CN104125653A - Terminal ad hoc network access method - Google Patents
Terminal ad hoc network access method Download PDFInfo
- Publication number
- CN104125653A CN104125653A CN201310146695.XA CN201310146695A CN104125653A CN 104125653 A CN104125653 A CN 104125653A CN 201310146695 A CN201310146695 A CN 201310146695A CN 104125653 A CN104125653 A CN 104125653A
- Authority
- CN
- China
- Prior art keywords
- priority
- terminal
- access
- service
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention provides a terminal ad hoc network access method comprising a step a that a transmitting party transmits an access frame detection signal from a random position of a free time slot detected or a system preset position, receives signals of other terminals at other time frames of the time slot, reinitiates access randomly after a while if the access fails, and transmits business messages at the time slot if the access succeeds; and a step b that a receiving party receives synchronization information and the detected signals of other terminals, creates a local dynamic routing table, receives business messages of other terminals, conducts local processing when determining that the information destination address is the terminal, and forwards the business messages when the destination address is other terminals.
Description
Technical field
The present invention relates to radio communication, relate in particular to a kind of cut-in method of terminal MANET.
Background technology
Wireless Mesh technology taking 802.X.X as representative is current study hotspot and emphasis, this class Wireless Mesh technology is got up for Internet wireless access and application development, and its typical case application is mainly manifested in that specific region, city, complicated block, buildings are inside and outside, in Office Area, family room and the scene such as individual periphery.In this applied environment, each node often moves for fixing or low speed, and the variation of network topology structure is slow, and business is taking Internet access as main, and the enforcement business such as voice are also that mode taking VoiP is as main.Technology realizes upper, and physical layer is identical with PMP, only does the route processing for Mesh at MAC.
In the scene such as tactical communication and rescue and relief work, business is often taking cluster voice, short data real time multicast service as main, and will meet the demand that each access point is communicated by letter in movement, and therefore the change in topology of network is fast, the business of carrying is real-time, high to the coverage requirement of single-hop.Existing terminal MANET cannot meet the demand.
Summary of the invention
The present invention proposes a kind of cut-in method of terminal MANET, comprises the steps:
A transmit leg:
A.1 send access frame detect signal in random site or the systemic presupposition position of the free timeslot listening to, receive the signal of other-end in other periods of this time slot;
If a.2 access failure, initiates access again after random wait a period of time; If access successfully, take this time slot and send service message;
B recipient:
B.1 the detectable signal of receiving synchronous information and other-end, generates local dynamic routing table;
B.2 receive the service message of other-end, judge that this information object address is for this terminal, local processing; If destination address is other-end, forward this service message.
Preferably, a.1 step also comprises: if high-priority service, the high-priority service that superposes on access frame signal synchronous head is seized mark; If receive other-end and carried high-priority service and seize the access frame signal of mark, finish this access.
Preferably, the failure of step in a.2 can be: if detect conflict, find other free timeslots and again send access frame detect signal, all detect conflict if double, think access failure; Described access is successfully: on described free timeslot, two continuous frames does not all detect conflict, thinks and accesses successfully.
Further, the detectable signal user totem information that further superposes; User ID size is consistent with the User Priority of this terminal; Its medium priority can be User Priority, service priority or service priority and User Priority.
Preferably, b.1 step also comprises: recipient receives that the lower terminal of instruction priority accesses again from mutually each other when the detectable signal of two of hidden node and above terminal simultaneously; Described instruction completes by dodging index signal in the position transmission of the lower terminal transmission detectable signal of priority; Wherein dodge the detectable signal that index signal can be user ID extreme higher position 1.
The cut-in method that the present invention proposes has been avoided access negotiations process, can make terminal seize fast channel, meets the high demand of requirement of real-time of specific communication.
Brief description of the drawings
The resource division of Fig. 1 OFDM/TDMA and physical frame signal schematic representation;
The resource division of Fig. 2 GMSK/TDMA/FDMA and physical frame signal schematic representation;
Fig. 3 accesses frame signal schematic diagram;
Fig. 4 access procedure schematic diagram;
The application scenarios schematic diagram of the hidden node of Fig. 5;
Fig. 6 traffic frame form schematic diagram;
Fig. 7 on-demand routing protocol schematic diagram.
Embodiment
Taking McWiLL terminal as example, by reference to the accompanying drawings, specific embodiment of the invention is described in further detail below.System and method in this specific embodiment can be supported maximum 8 Tiao Wu center Real-Time Cluster business, and the user in group service has priority, in the time of 8 jumping, be less than 50mS the turn-on time of group service, and propagation delay time is less than 200mS, meets the needs of Real-Time Cluster voice command scheduling call; Support maximum 8 Tiao Wu center real-time Data Transmission, in the time of 8 jumping, be less than 50mS the turn-on time of data service, and unidirectional maximum delay is less than 100mS, and two-way maximum delay is less than 200mS; The real-time Transmission of supporting the maximum 8 point-to-point voice and videos in Tiao Wu center, in the time of 8 jumping, transmission delay is less than 200mS.
Ad hoc network terminal can realize by changing the mode of software two kinds of mode of operations of terminal, i.e. node in terminal and MANET under McWiLL.The replacing of mode of operation can be manual mode, can be also automated manner.
One, application scenarios is described
Battalion and the following combat unit field operations commander of battalion, emergency repair, field work.Support real-time concentrated speech business, support short data, picture transmission and transfer of data.Under the environment that has GPS/DB to support, mutual positional information is provided, dynamically present with the form of marking on a map.Rely on the ability of transfer of data, share overall situation information.The terminal of MANET, can be by the form realization of radio network gateway and interconnecting of McWiLL network.Therefore terminal MANET can regard that McWiLL network extends in the one of network edge as.
Two, physical layer
Taking 5MHz × 10mS or 1MHz × 10mS as a Resource Block, this Resource Block is divided into 8 or 4 mutually orthogonal independent sub-blocks.Each independent sub-block is the minimum transfer resource that each terminal is seized to intercept the mode of competition, and terminal is being seized after idle transfer resource, sends the information of this terminal.The information of this terminal is that base band code stream that local user produces adds the base band code stream forwarding into other-end, and synthetic code stream sends eating dishes without rice or wine with the form at alone family.Consider the use of Flood routing or part Flood routing, transmitting is with the pattern of broadcast, and chnnel coding suggestion adopts 1/2 convolution code.
While selecting 5MHz radio frequency bandwidth, adopt the modulation system of OFDM, carry out the division of Resource Block with TDMA, this kind of working method more stresses meeting the demand of transmission bandwidth.The resource division of employing OFDM/TDMA and frame structure are as shown in Figure 1.10ms is 1 frame, and 1 frame is divided into 8 time slots, the protection interval that each time slot comprises 97uS and 63uS synchronous head.Reserved 7uS in protection interval is as transmitting-receiving translation and protection, and 90uS is distance protection, and the distance of 90uS estimates to meet the needs of 13Km transmission range.Also 8 time slots can be merged into 4 time slots, now maximum hop count is 4.When two time slots merge, the expansion of load transmittability is twice, and synchronous head and transmitting-receiving translation and protection interval become one, and 187uS is expanded at distance protection interval to, corresponding maximum transmission distance 28Km.
While selecting 1MHz radio frequency bandwidth, adopt the GMSK modulation mode of permanent envelope, carry out resource division as main taking TDMA, take into account FDMA.In the situation that terminal adopts identical power amplifier, the transmitting power of GMSK@1MHz in theory can high 19dB than the transmitting power of OFDM@5MHz.As shown in Figure 2, in frame format, synchronous head is identical with load for the resource division of employing GMSK/TDMA/FDMA and frame structure, and other are identical with 5MHz.
MANET synchronously can adopt three kinds of modes, the first adopts global positioning system or dipper system (GPS/BD) to carry out synchronously, receiving in the environment of GPS/BD, can obtain the absolute time benchmark of positional information and the system of terminal by GPS/BD.From utilizing the pulse per second (PPS) that GPS/BD obtains can carry out synchronously, utilize the positional information of GPS/BD acquisition simultaneously, can present cooperation personnel's positional information.As fruit product, selection in the time designing has the DB module of emission mode, can also utilize the SMS of BD, carries out short message communication under the environment without other transmission means; Its two mode that adopts relevant range to send synchronous time mark realizes the demarcation of terminal 10mS time reference; The third mode is to utilize the synchronizing signal sending, and terminal is carried out the locking of time reference each other.
Terminal is before transmission information, if do not receive the synchronizing signal of other-end, carry out the transmission of signal by own local clock, the synchronizing signal that this terminal sends is exactly the seed clock in self-organization network, the interior other-end of net that receives synchronizing signal is synchronizeed with this seed synchronizing signal, can not directly receive the terminal of this seed synchronizing signal, receive the synchronizing signal of other-end forwarding and synchronize with the signal of receiving.
Resource Block adopts the mode that sends m sequence to cut apart on time shaft, this m sequence modulation the information of 2bit, represent that respectively high-priority service robs and the important information such as frequency pattern sequence number.The signal power of this m sequence transmitting is high and spreading gain is large, and therefore this m sequence has synchronously, wireless link budget measurement between time slot mark, 2, the transmission of the whole network broadcast, terminal wake-up, economize on electricity, business are shared, receiver gain adjustment, receiver frequency offset correction, realize the functions such as receiver coherent demodulation.
No matter be the radio frequency bandwidth of 1MHz or the radio frequency bandwidth of 5MHz, synchronous head all sends by the bandwidth of 1MHz, adopts the m sequence that length is 63, and chip duration is 1uS, takies altogether the time of 63uS.The synchronous head of different time-gap adopts different m sequences, in search synchronous head, also can know the sequence number of time slot used like this.In the m sequence of 63, mould two two 31 the long m sequences that superpose, 63uS time when synchronous in order to utilize and power transmit the information of 2bit, representative respectively: 00 high-priority service is seized, receive this mark, all terminals time-outs send 2 frames on the time slot having taken, and wait for after high-priority service accesses and again accessing, the rear continuity business of access.01,10,11 represent frequency pattern sequence number.The do not superpose information of this 2bit is normal synchronous head.
For the system of 5MHz bandwidth, the transmitting power of synchronous head is than the high 7dB of the power of Traffic Channel, 63 long m sequence despreadings gain up to 18dB, the link budget of synchronous head, than the link budget of Traffic Channel high 25dB in the time adopting 5MHz radio frequency bandwidth, is wanted high 18dB in the time adopting 1MHz radio frequency bandwidth theoretically.Adopt synchronous head to carry out link budget measurement, in the time adopting 5MHz radio frequency bandwidth, can measure isolation more than identical services time slot 20dB, in the time adopting 1M radio frequency bandwidth, can measure isolation more than 15dB.There is the measurement result of identical services time slot isolation, just can multiplexing time slot.Tentatively think and adopt the modulation scheme of OFDM, for reaching the ability of transmission 16QAM, need the isolation of 20db, and GMSK needs the isolation of 15dB.
The power saving design of terminal, while not having signal demand to send in network, terminal is in sleep state, now only there is the LNA work of front end, if there is the transmitted signal of other-end to arrive, the signal of LNA output can, higher than certain threshold value, utilize this status signal, wakes terminal up and receives and complete other relevant operations.Do not wake up if exceed regular hour terminal, terminal can be waken up according to the timing of oneself, and the interval of timing can arrange according to different needs.Terminal, after being waken up, receive the signal of GPS/BD, carries out position renewal and clock alignment.
In the time that electric weight is not enough, can reduce the transmitting power of this nodal terminal.Reduce the link budget that transmitting power has been equivalent to adjust most critical in routing table and measure, network according to route can automatic reduction need to this node forwarding traffic carrying capacity, also represented that in network, other nodes are shared energy, reach the object of the whole network balancing energy.According to the point-to-point transmission link-quality in routing table, should select as much as possible high-order modulating, in the situation that transmitting power is constant, shorten as far as possible call duration time like this.
Therefore, synchronous head has synchronously, wireless link budget measurement between time slot mark, 2, the transmission of the whole network broadcast, terminal wake-up, economize on electricity business share this six major functions.Certainly, can also adjust receiver gain, realize receiver frequency offset correction by synchronous head, realize the coherent demodulation of receiver etc.
Three, terminal access procedure
In order to reach the requirement of the quick connecting system of 50mS business, design terminal in receiving, directly judge idle frame, the time slot that is idle frame in terminal judges, directly send the spread spectrum coding sequence that carries user ID or dodge mark, because spread spectrum sequence has very high spreading gain, can in the Business Stream of proper communication, detect accurately and conveniently, and have than the high a lot of link budget of proper communication business, can survey larger scope, thus the problem of hidden terminal efficiently solve self-organization network in ensureing access fast in.
Need the terminal of access, in receiving 10mS complete signal, just know which time slot is idle.Send access frame at the free timeslot place of ensuing next 10mS frame, access frame signal schematic diagram as shown in Figure 3.Access frame is in the random site (angle that this random site is simplified from Project Realization, can define 8 fixing time points, while realization, only put and carry out random probing in these 8 regular times) the upper collision detection signal that sends, collision detection signal duration 64uS, adopt m sequence mould two to add the mode of Walsh code, design 64 long, 8 × 8 Walsh carries the user totem information of 1 byte.Recipient is receiving after synchronizing signal, detectable signal like this, just knows this time slot of what CU of what time slot, for dynamic routing provides route required relevant information.User's identification information takies 7bit, if by the extreme higher position 1 in 1 byte, in the scene for hidden node, is used for doing access and dodges instruction having each other.
The access procedure of terminal as shown in Figure 4.The detectable signal duration 64uS of access frame, only account for the part that time slot is very little, on the time period not sending at this time slot, receive the signal of other-end, judge whether access interference according to the situation that receives signal, show to have occurred access collision if find that there is access interference (having received the collision detection signal that other-end sends), continue to receive, find other free timeslot.If access interference do not detected, continue to send out access frame at next 10mS, the detectable signal in this access frame is random generation equally.If collision detected, continue to find free timeslot, repeat access procedure.If all have collision double, think access failure, random wait a period of time is accessed again.If double access frame does not all detect collision, think and can normally take this time slot, access successfully.If can not find idle time slot always, think that network is in full load condition, this thing is if general business receives 10mS frame always, until find idle frame.If high-priority service, the high-priority service that superposes on synchronous head is seized mark, carries out high priority and seizes access.Conflict detectable signal, according to the designing requirement difference of product, also can adopt the mode of frequency spreading code division to send.
Be each other the application scenarios schematic diagram of hidden node as shown in Figure 5.Node A and Node B are because the reason of landform cannot be received the other side's signal each other, and now we claim that node A and Node B are hidden node each other.But node A and Node B all have good transmission of wireless signals passage with node C, if now node A and Node B access respectively on identical time slot, this time slot is again without other node accesses, there will be node A and Node B all can normally access, but the signal that in fact two nodes send respectively can bump at node C place, causes node C correctly not receive and forwarding information.Node C, receiving after the access frame that node A and Node B send at same time slot respectively, should receive two detectable signals, and now node C can be according to the prioritization of user ID, and the user of instruction low priority accesses again.The method of operation is, the next frame of the time slot that node C chooses at A, two nodes of B simultaneously sends the position of detectable signal in the terminal that will dodge, send and dodge index signal, and dodging index signal is being up in user ID to be put to 1 detectable signal.The node that priority is low, that in the time doing collision detection, can receive that node C sends dodges index signal, and now low priority user reselects free timeslot and accesses, and high-priority users is normally access.If the quantity of mutual hidden node is greater than two, by same processing method.
Four, network routing Design thinking
The core of network route is to set up and dynamically to maintain the dynamic routing table of a similar MAC table, dynamic routing table can be under the state of network underloading, the transmission of carrying out is each other upgraded, and uses so that the dynamic routing table on single-point improves into the dynamic routing table that can reflect the whole network state as much as possible.The visual environment for use of frequency of upgrading is set.
The physical identification number that dynamic routing table comprises node, to the network of maximum 120 nodes, can adopt 1 byte (8) to identify, and this mark is the unique identifying number of physical node in network.Wherein 8～127 these 120 user ID are to user, 0～7 these 8 be designated system special identifier, represent different cluster groups.User ID is arranged priority by order from small to large, and 00H represents limit priority cluster group, and 08H represents highest priority user.
The longitude and latitude position of each terminal that routing table is measured according to GPS/BD, calculate distance each other, can be according to the intensity that receives synchronous head signal, calculate link budget each other, there is position each other, particularly link budget each other, the algorithm of physics route has just had basis.To there is no the node of position and link budget data each other, can only adopt the simple and the most sane algorithm that floods, the signal broadcast transmission that is about to receive.
Routing table is 128 × 128 matrix, and in matrix, each element is used for description chain line state, and this state is judged by the power that receives synchronizing signal, adopts 4 bytes to describe.Wherein high two: 00 representative does not have measured value, 01 represents that Link State is poor, and 10 represent that Link State is good, and 11 represent that Link State is outstanding; Low two is temporarily reservation position.On diagonal, element is described the state of this node, comprising: busy-idle condition, routing table dynamically update record.Busy wherein can reflect from the situation of each nodal cache.Real-Time Cluster business is high-priority service, and system has 8 groups of concurrent abilities of support, and each node is (or suspending the storage forwarding class business that sends) in the situation that not transmitting other messaging services, can ensure that group service is unobstructed.
The traffic frame form of MANET as shown in Figure 6, is made up of frame head and load two parts.Frame head comprises: the source user mark of 7bit, targeted customer's mark of 7bit, the transmission frame number record of the type of service of 2bit and 3bit.The service identification of 2bit is respectively: 00 represents group service, and 01 represents individual calling business, and 10 represent video traffic, 11 representative data business.In group service, in targeted customer's mark, 0～7 represents 8 different cluster groups.The frame number of 3bit has two effects, and the first is eliminated the inundation that may occur on network.Repeatedly receive the transmission frame of same forwarding when receiving node, have identical original subscriber's mark, identical targeted customer's mark, show has duplicate packages within maximum 8 transmission times (80mS) of jumping, and the duplicate packages receiving is abandoned.It two is business packet sequences of realize target node.In self-organization network, exist different business packet to walk the situation of different transmission path, cause destination node to receive data packet disorder, the frame count of 3bit is set, be equivalent to be a Buffer, can utilize this Buffer to adjust the order that receives packet.
The route of group service adopts the method that simply floods, and after terminal is received, according to collection group identification, one's own group of business, takes off voice packet, hands to also original sound of local vocoder.The cluster bag of to one's name not organizing, forwards.Design supports that 8 speech businesses are concurrent, can meet all groups and work simultaneously.
As multiple users independent PTT that initiates while seizing (almost simultaneously) from the network without direct radio path each other, each receiving node can be received multiple from the bag of group service on the same group of homologous address not, and each node takes out business be reduced into sound by limit priority.To carrying out the user that PTT seizes, in seizing, also can receive the business packet of PTT on the same group that other users send, press and receive that source node node identification number compares with this section, if receive the information on the same group lower than this node, proceed PTT originating traffic.If receive the group service on the same group higher than this node, adopt the mode of sound or vibrations or word to remind the user traffic access of this group high priority, now operator should unclamp PTT key, releases PTT telephone condition, enters the state of paying attention to the class.
In the time that node has been received high priority bank, should adopt equally prompting or the mode without prompting, directly enter the state of paying attention to the class of high priority bank.
The route of data service adopts the auxiliary routing mode of local node.Destination address in the packet of receiving according to terminal, determines whether to send to the data of this node, if so, just packet is taken off, and no longer forwards.If not, will determine whether will forward according to the routing table of this node.From the routing table of this node, can find and whether have the link that can arrive with destination node, if had, on behalf of forwarding.If no, can be according to the busy-idle condition of this node, determine whether send out in the mode flooding, the spare time is sent out, busy do not send out.The busy-idle condition of this node can be fixed according to the situation of this node Dai Fa data queue.Sky is not busy, has and queues up as busy.
To point-to-point speech business and video traffic, can adopt above routing mode, also can adopt route as required, on-demand routing protocol schematic diagram is as shown in Figure 7.Point-to-point speech business and video traffic are had before business is initiated to the process of a dialing, utilize the process of dialing to adopt the mode flooding to send route request information to destination node.Destination node is being received after route request information, according to the routing condition recording in route request information, selects best route in many routes.Selected best route messages returns to origin node by destination node again, and business packet is afterwards transmitted by this route.
Routing algorithm is the algorithm that present node participates in.The present nodes such as user's state, service priority, type of service are all known, and these information generally do not change in network uses, or the frequency frequency changing is very low, utilizes to greatest extent these information the dynamic routing table in conjunction with present node, just can route optimization.
Terminal data business external interface adopts Ethernet interface and the Ethernet protocol of standard, the agency who realizes IP agreement in terminal.
The system and method that the present invention proposes has carried out special design in physical layer, especially makes full use of that synchronous head signal is synchronous, wireless link budget measurement between time slot mark,, the transmission of the whole network broadcast, terminal wake-up, economize on electricity, business share this six major functions at 2.Certainly, can also adjust receiver gain, realize receiver frequency offset correction by synchronous head, realize the coherent demodulation of receiver etc.Synchronous head adopts long sequence spread spectrum code, and its link budget is far above service transmission channel, the problem of hidden terminal in solution self-organization network that therefore can be comparatively succinct.
The particular design of physical layer makes system can obtain easily the routing table that comprises link-quality between node in the process of work, the routing table broadcast in cooperation cycle, compared with other system design, by the particular design of physical layer synchronization head, can be with low-down network cost, obtain the network routing table of the whole network, increase the problem that efficiency sharply declines thereby solve in self-organization network with network size.
Tentatively setting up on the basis of network routing table, system can effectively solve the problem of cluster and data multicast service inundation in the time that use floods algorithm, thereby makes system compared with macroreticular scale in the situation that, still can well support real time business.To point-to-point service, owing to there being a routing table, can utilize existing achievement in research, effectively the performance of optimized network.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (15)
1. a cut-in method for terminal MANET, is characterized in that, comprises the steps:
A transmit leg:
A.1 send access frame detect signal in random site or the systemic presupposition position of the free timeslot listening to, receive the signal of other-end in other periods of this time slot;
If a.2 access failure, initiates access again after random wait a period of time; If access successfully, take this time slot and send service message;
B recipient:
B.1 the detectable signal of receiving synchronous information and other-end, generates local dynamic routing table;
B.2 receive the service message of other-end, judge that this information object address is for this terminal, local processing; If destination address is other-end, forward this service message.
2. method according to claim 1, is characterized in that, a.1 described step further comprises: if high-priority service, the high-priority service that superposes on access frame signal synchronous head is seized mark; If receive other-end and carried high-priority service and seize the access frame signal of mark, finish this access.
3. a.2 method according to claim 1, is characterized in that step, and described access failure is: if detect conflict, find other free timeslots and again send access frame detect signal, all detect conflict if double, think access failure; Described access is successfully: on described free timeslot, two continuous frames does not all detect conflict, thinks and accesses successfully.
4. method according to claim 1, is characterized in that, the described detectable signal user totem information that further superposes.
5. method according to claim 4, is characterized in that, described user ID size is consistent with the User Priority of this terminal.
6. method according to claim 1, is characterized in that, b.1 described step further comprises: recipient receives that the lower terminal of instruction priority accesses again from mutually each other when the detectable signal of two of hidden node and above terminal simultaneously.
7. method according to claim 6, is characterized in that, described instruction completes by dodging index signal in the position transmission of the lower terminal transmission detectable signal of priority.
8. method according to claim 7, is characterized in that, described in dodge the detectable signal that index signal is user ID extreme higher position 1.
9. method according to claim 6, is characterized in that, described priority is User Priority or service priority or service priority and User Priority.
10. method according to claim 9, is characterized in that, recipient is service priority first relatively, if the identical User Priority that compares again of service priority; Or recipient is User Priority first relatively, if the identical service priority that compares again of User Priority.
11. according to the method described in claim 1 to 10 any one, it is characterized in that, described terminal is SCDMA terminal, taking 5MHz × 10mS or 1MHz × 10mS as a Resource Block, each Resource Block is divided into again mutually orthogonal 8 or 4 independent sub-blocks, and each independent sub-block is the minimum transfer resource that terminal is seized.
12. methods according to claim 11, is characterized in that, the method also comprises: adopting TDMA to carry out resource division: 10ms is 1 frame, and 1 frame comprises 8 time slots, the protection interval that each time slot comprises 97uS and 63uS synchronous head; Or 1 frame comprises 4 time slots, the protection interval that each time slot comprises 187uS and 63uS synchronous head.
13. methods according to claim 12, is characterized in that, described synchronous head is made up of the m sequence of one 63 length, and different time-gap adopts 63 different long m sequences.
14. methods according to claim 13, is characterized in that, described synchronous head further comprises: the m sequence of 2 31 length that superpose in the m sequence of 63 length transmits 2 bit informations, is respectively used to indicate high-priority service to seize and frequency pattern sequence number.
15. methods according to claim 12, is characterized in that, described detectable signal duration 64uS, and the mode of employing m sequence stack walsh code, Walsh code carries user totem information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310146695.XA CN104125653B (en) | 2013-04-25 | 2013-04-25 | A kind of cut-in method of terminal ad hoc network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310146695.XA CN104125653B (en) | 2013-04-25 | 2013-04-25 | A kind of cut-in method of terminal ad hoc network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104125653A true CN104125653A (en) | 2014-10-29 |
| CN104125653B CN104125653B (en) | 2018-05-11 |
Family
ID=51770882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310146695.XA Expired - Fee Related CN104125653B (en) | 2013-04-25 | 2013-04-25 | A kind of cut-in method of terminal ad hoc network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104125653B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106899942A (en) * | 2015-12-18 | 2017-06-27 | 北京信威通信技术股份有限公司 | The control method that a kind of broadcast message is cycled through |
| CN111757532A (en) * | 2019-03-27 | 2020-10-09 | 电信科学技术研究院有限公司 | Method, device and node for detecting and resolving synchronous channel conflict of wireless ad hoc network |
| CN111953441A (en) * | 2019-05-15 | 2020-11-17 | 电信科学技术研究院有限公司 | Synchronization method and device |
| CN113055133A (en) * | 2021-03-11 | 2021-06-29 | 宸芯科技有限公司 | Hybrid automatic repeat request HARQ response method, device, equipment and medium |
| CN116249077A (en) * | 2023-02-27 | 2023-06-09 | 北京云智软通信息技术有限公司 | Method and device for acquiring communication routing state of working group member |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040100929A1 (en) * | 2002-11-27 | 2004-05-27 | Nokia Corporation | System and method for collision-free transmission scheduling in a network |
| CN1717879A (en) * | 2002-10-25 | 2006-01-04 | 哈里公司 | Method and device for establishing links in an ad hoc wireless system |
| CN101137230A (en) * | 2007-09-30 | 2008-03-05 | 东南大学 | Time-division synchronous CDMA and mobile self-organizing network combined dual-busy tone media access method |
| US20080198815A1 (en) * | 2007-02-21 | 2008-08-21 | Itt Manufacturing Enterprises, Inc. | Nearly Collision-Free Channel Access System and Method |
-
2013
- 2013-04-25 CN CN201310146695.XA patent/CN104125653B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1717879A (en) * | 2002-10-25 | 2006-01-04 | 哈里公司 | Method and device for establishing links in an ad hoc wireless system |
| US20040100929A1 (en) * | 2002-11-27 | 2004-05-27 | Nokia Corporation | System and method for collision-free transmission scheduling in a network |
| US20080198815A1 (en) * | 2007-02-21 | 2008-08-21 | Itt Manufacturing Enterprises, Inc. | Nearly Collision-Free Channel Access System and Method |
| CN101137230A (en) * | 2007-09-30 | 2008-03-05 | 东南大学 | Time-division synchronous CDMA and mobile self-organizing network combined dual-busy tone media access method |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106899942A (en) * | 2015-12-18 | 2017-06-27 | 北京信威通信技术股份有限公司 | The control method that a kind of broadcast message is cycled through |
| CN106899942B (en) * | 2015-12-18 | 2020-02-14 | 北京信威通信技术股份有限公司 | Control method for broadcast information cycle transmission |
| CN111757532A (en) * | 2019-03-27 | 2020-10-09 | 电信科学技术研究院有限公司 | Method, device and node for detecting and resolving synchronous channel conflict of wireless ad hoc network |
| CN111757532B (en) * | 2019-03-27 | 2022-08-30 | 大唐移动通信设备有限公司 | Method, device and node for detecting and resolving synchronous channel conflict of wireless ad hoc network |
| CN111953441A (en) * | 2019-05-15 | 2020-11-17 | 电信科学技术研究院有限公司 | Synchronization method and device |
| CN111953441B (en) * | 2019-05-15 | 2021-09-10 | 大唐移动通信设备有限公司 | Synchronization method and device |
| CN113055133A (en) * | 2021-03-11 | 2021-06-29 | 宸芯科技有限公司 | Hybrid automatic repeat request HARQ response method, device, equipment and medium |
| CN116249077A (en) * | 2023-02-27 | 2023-06-09 | 北京云智软通信息技术有限公司 | Method and device for acquiring communication routing state of working group member |
| CN116249077B (en) * | 2023-02-27 | 2023-10-20 | 北京云智软通信息技术有限公司 | Method and device for acquiring communication routing state of working group member |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104125653B (en) | 2018-05-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104125617A (en) | System and method for mobile terminal ad-hoc network | |
| Parkvall et al. | 5G NR release 16: Start of the 5G evolution | |
| CN106688288B (en) | Synchronization process and resource control method and device for communication in D2D system | |
| EP3198956B1 (en) | Synchronization procedure and resource control method and apparatus for communication in d2d system | |
| Rajendran et al. | Energy-efficient, application-aware medium access for sensor networks | |
| CN110167099B (en) | Ad hoc network routing method and system suitable for narrow-band condition | |
| CN102612152B (en) | Ad Hoc network MAC (Media Access Control) protocol realizing method based on STDMA (Self Organizing Time Division Multiple Access) | |
| CN104125619B (en) | A kind of method for routing of terminal ad hoc network | |
| CN108029110A (en) | The method and apparatus of on-demand broadcasting system information | |
| WO2019192466A1 (en) | Method and device for allocating relay resources | |
| CN101616479A (en) | In the TDMA multi-hop wireless network, carry out the method and apparatus of time synchronized | |
| JP2014507091A (en) | Communication method and system | |
| CN104125653A (en) | Terminal ad hoc network access method | |
| WO2020019297A1 (en) | Method, device and system for transmitting information between internet of vehicles devices | |
| JP2010016809A (en) | Network topology formation | |
| CN106535207B (en) | One kind miniaturization multi-service wireless ad hoc network system | |
| CN106105103A (en) | Clock synchronizing method, equipment and communication system | |
| CN109076321A (en) | System information transmission method, apparatus and system between car networking equipment | |
| JP2012124663A (en) | Radio communication system, radio communication method, and radio communication program | |
| CN113573408A (en) | Resource coordination method and device | |
| KR101751757B1 (en) | Time slot allocation and frequency slot allocation algorithm in a tree-based wireless sensor network | |
| CN102386991B (en) | Timeslot interchange operating method for time division multiple address access system in wireless mobile self-organized network | |
| EP2745437B1 (en) | Method of transmission between nodes of a manet communication network operating on an hf band with tdma sharing of the radio channel | |
| KR100804860B1 (en) | Early termination of low data rate traffic in a wireless network | |
| WO2020029560A1 (en) | Method and apparatus for paging |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20191121 Granted publication date: 20180511 |
|
| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20200710 Granted publication date: 20180511 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180511 Termination date: 20200425 |