WO2007003137A1

WO2007003137A1 - A method for finding adjacent station and establishing connection with adjacent station by coexistence bs when initializing

Info

Publication number: WO2007003137A1
Application number: PCT/CN2006/001556
Authority: WO
Inventors: Xuyong Wu
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2005-07-05
Filing date: 2006-07-04
Publication date: 2007-01-11
Also published as: CN1863345A; CN100544470C

Abstract

A method for finding adjacent station and establishing connection with adjacent station by coexistence BS when initializing, the method comprises: setting a DCTS (downlink coexistence dedicated time piece) in downlink frame structure of the coexistence BS; the BS started up newly transmits connection request message to terminals located in the overlapped area with adjacent station by utilizing said DCTS, and finding adjacent station and establishing connection with the adjacent station In accordance with the connection message returned. By using the method of the present invention, coexistence BS can find adjacent station quickly and establish connection and the adjacent station when initializing.

Description

Method for coexisting base station to discover neighboring stations and establish contact with neighboring stations at initialization time

The present invention relates to the field of communications, and in particular, to a method for coexisting a base station to discover a neighboring station and establish contact with a neighboring station at initialization. Background of the invention

Broadband wireless access BWA (Broadband wireless access) devices can provide users with convenient broadband access. There are currently broadband wireless access devices based on proprietary protocols, as well as broadband wireless access devices based on standard protocols. Broadband wireless access technology is currently booming, and the technology of using broadband resources to carry out broadband urban access has strong vitality and market space.

Wireless spectrum resources are invaluable in wireless access networks. Especially in some unplanned areas or in networks where there are some unlicensed bands, there are often multiple base stations operating on the same channel, causing signals from different base stations to interfere with each other. Therefore, in order to coordinate the coexistence between the base station devices in the same frequency band, especially among the base station devices on the unlicensed frequency band, it is necessary to establish a coexistence mechanism between the base station devices, that is, to establish a corresponding coexistence base station system.

Before introducing the coexistence base station system, first introduce the definition of the neighbor station to be mentioned later. A neighboring station is a base station that has a common coverage area and that has a valid terminal in the common coverage area. For example, in the network shown in FIG. 1, although BS1 and BS2 are geographically close, and the BS1 and BS2 stations are each in the coverage area of the other party, since there is no valid terminal in the common coverage area of the BS1 and BS2 sites, The BS1 and BS2 stations are not considered neighbors. However, although the overlapping areas between BS2 and BS3 are relatively small, each of them is not in the coverage area of the other party, but there are valid terminals in the overlapping coverage area, which constitutes interference to the other party's wireless network, so BS2 and BS3 are called neighboring stations.

In a coexisting base station system, it is often required that each base station must ensure that the transmission and reception are mutually synchronized, and that the transmission and reception signal frame timings between the base stations are strictly aligned, so that the sites with similar geographical locations are not mutually transmitted and received. interference. For example, in BS1 and BS2 in Fig. 1, if BS2 is transmitting when BS1 is transmitting, BS1 will cause serious interference to the signal that BS2 receives the subordinate terminal.

The basic structure of the coexisting base station is shown in Figure 2. It consists of three parts: the wireless function part, the wired function part, and the coexistence function part (including the coexistence database). The coexistence function part and the other two parts have interfaces, the wired function part is connected to the wired core network or the access network is responsible for the transmission and reception and processing related to the wired communication, and the wireless function part is connected to the air interface for the wireless communication receiving and processing and processing, the wired function Partially connected to the wireless function section.

The base station is divided into a normal working state and a startup initial state. In the coexisting base station system, when the base station is often connected to the core network through a wired path and can be interconnected by wire, a newly activated base station is in a certain normal working state. When initializing near a base station, there are many problems in the interaction of establishing messages with neighboring stations. Taking the coexistence base station network shown in FIG. 3 as an example, the starting base station SBS1 faces a plurality of base stations with similar geographical locations: WBS1, WBS2, WBS3, and WBS4. In FIG. 3, WBS1 and SBS1 have common coverage areas. Terminals A and B, and there are terminals in the common coverage area of WBS2 and SBS1, and terminal D is in the common coverage area of WBS3 and SBS1. Therefore, WBS1, WBS2, WBS3 and SBS1 are neighbors. The terminal G is in the overlapping portion of the coverage areas of the base stations WBS1 and WBS2. The other terminals E/F/H/I/J/K are not in the overlapping area between the base stations.

At this time, SBS1 cannot communicate directly with each WBS on the air interface, and the contact side (such as IP address) of the other party is not known on the wired side. Therefore, SBS1 cannot discover its neighbors and establish contact with neighbors. However, the SBS1 in the air interface will directly interfere with the terminal in the overlapping part of the WBS coverage area with the SBS1. The uncoordinated terminals of the multiple WBSs interfere with each other for the SBS1, so that the SBS1 cannot parse the information it carries.

In the above case, a neighboring station discovers and establishes a contact method in the prior art: after the base station is started, the message sent by the neighboring station is detected by the signal of the air interface, and the message is parsed to obtain the information of the neighboring station.

The disadvantages of this method are as follows: Since neighboring stations often cannot directly receive signals from each other's stations, they cannot parse the information of the neighboring stations. For example, in the network of Figure 3, SBS1 cannot directly detect the signal of WBS1.

Another method for discovering and establishing a contact between neighboring stations in the prior art is as follows: After the base station is started, the SBS detects the signal of the terminal of the neighboring station through a simple detection method, and parses the message to obtain the information of the neighboring station.

The disadvantages of this method are as follows: Since there is no guarantee mechanism, the terminals of multiple neighboring stations interfere with each other on SBS1, so that SBS1 can receive the signal, but cannot correctly parse the content in the signal. For example, in Figure 2, A, B, The signals of the four terminals of C and D may collide, and SBS1 can receive the signals sent by each terminal when starting up, but cannot parse the information carried in each signal.

Another method for discovering and establishing a connection between neighboring stations in the prior art is: after the base station SBS1 is started, information such as its latitude and longitude is registered by wire to a coexistence information server (CIS), and the server judges its neighboring station by using information such as latitude and longitude, and Information (IP address, etc.) sent to these neighbors of SBS1.

The disadvantage of this method is that the server cannot provide reliable neighbor information to the base station SBS1 because it can not directly judge whether it interferes with each other according to the distance from other stations. Moreover, since the coexistence base station system is often not owned by a unified fixed operator, the setup and management of the coexistence information server is also problematic. In addition, the method needs to introduce devices other than the coexisting base station system, which increases the cost. Summary of the invention

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for coexistence base stations to discover neighboring stations and establish contact with neighboring stations upon initialization, thereby enabling the coexisting base station to quickly discover neighboring stations and establish contact with neighboring stations upon startup.

The object of the invention is achieved by the following technical solutions:

The present invention provides a method for a neighboring station to discover a neighboring station and establish a contact with a neighboring station at the time of initialization. The law mainly includes:

A, setting a downlink coexistence dedicated time slice DCTS in the downlink frame structure of the coexisting base station;

B. The newly activated base station actively sends a contact request message to the terminal in the overlapping area with the neighboring station by using the DCTS, and discovers the neighboring station according to the returned contact message and establishes contact with the neighboring station.

The locations defined by the DCTS include:

Any time position in the original downlink frame format, where the time position adjacent to the beginning or end of the original downlink frame format portion is included.

The step A described specifically includes:

One DCTS is set in the downlink frame of each coexistence base station, or one DCTS is set only in the downlink frame of the coexistence base station that satisfies the set condition.

The step A described further includes:

In a certain area, the time starting point and the continuous length of the DCTS are fixed and described in the respective frequency band conditions.

Bl, the newly activated base station uses the DCTS to send a contact request message to the terminal in the overlapping area with the neighboring station, and the terminal submits the valid information carried in the received contact request message or contact request message to the terminal. Neighboring station

B2. The neighboring station to which the terminal belongs returns a contact message to the newly activated base station according to the received contact request message or the valid information carried in the message converted by the terminal format, and the newly activated base station receives the contact according to the received contact. The message establishes contact with the neighboring station.

The step B1 specifically includes:

Bl l, the newly activated base station uses the DCTS to send a contact request message including the contact information of the newly activated base station to the terminal in the overlapping area with the neighboring station;

B12. The terminal sends a request for reporting a coexistence message to the neighboring station to which the terminal belongs, and after receiving the report that can be reported by the neighboring station, the terminal submits the received contact request message to the neighboring station. .

The step B12 further includes: the terminal directly submitting the received contact request message to the neighboring station to which it belongs by using the remaining bandwidth originally allocated by the terminal.

The step B2 specifically includes:

B21. When the newly activated base station and the neighboring station to which the terminal belongs can be interconnected by wire, the ^ station returns a contact message to the newly activated base station by using a wired path;

B22. After receiving the contact message, the newly activated base station initiates a communication interaction with the neighboring station, and the two parties establish Effective wired contact.

The step B2 specifically includes:

B23, when the newly activated base station and the neighboring station to which the terminal belongs cannot be interconnected by wire, set an uplink coexistence dedicated time slice UCTS in the uplink frame structure of the coexisting base station;

B24. The neighboring station to which the terminal belongs selects a coexisting contact terminal, and instructs the coexisting contact terminal to use the UCTS to send the returned contact message to the newly activated base station on behalf of the network of the neighboring station;

B25. After receiving the contact message, the newly activated base station initiates a communication interaction with the neighboring station, and the newly activated base station and the neighboring station use the DCTS and the UCTS to perform information interaction through the contact terminal, and the two parties establish an effective wireless contact. .

The step B23 specifically includes:

One UCTS is set in the upstream frame of each coexistence base station, or one UCTS is set only in the upstream frame of the coexistence base station that satisfies the set condition.

The step B23 further includes:

In a certain area, the time starting point and the continuous length of the UCTS are fixed and described in the respective frequency bands. The step B24 specifically includes:

The contact terminal for a pair of newly activated base stations and neighboring stations may be one or more, and the contact terminal may be temporary or fixed for a period of time.

A method for coexisting a base station to discover a neighboring station and establish a contact with a neighboring station at the time of initialization, characterized in that it comprises:

C. Using the ranging slot Ranging Slot in the protocol or a UCTS set in the uplink frame of each coexistence base station, let the terminal transmit the interrogation signal to the base station outside the original base station in turn, and the bearer terminal in the interrogation signal Contact information of the original base station;

D. The base station in the initial state in which the signal is received or the base station in the normal working state will obtain the contact information of the terminal base station.

The step C described further includes:

In a certain area, the time starting point and the continuous length of the UCTS are fixed in each frequency band condition. As can be seen from the technical solution provided by the present invention, the present invention has the following advantages compared with the prior art:

1. The present invention can quickly discover neighboring stations through a simple mechanism for a newly activated base station SBS, and establish a wired or wireless connection with neighboring stations, thereby avoiding hidden problems of neighboring stations;

2. The working base station WBS can also know the situation of the base station being started in time, collect the status information of each terminal in the overlapping interference area, and quickly make the coexistence negotiation and corresponding operation with the SBS; 3. The present invention is compatible with the existing 802.16 frame format, and the neighboring station discovery phase does not require a public server, which reduces the requirements for network setup and management. The DCTS and UCTS provided by the present invention can also be used to solve some low levels other than initialization. Coexistence of informational information interaction. BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a schematic diagram of the concept of a neighboring station;

2 is a schematic diagram of a basic structure of a coexistence base station;

3 is a schematic diagram of a network of a coexisting base station according to the illustrated example of the present invention;

4 is a flow chart of a specific process of the method of the present invention;

5 is a schematic diagram showing the position of a DCTS in a frame structure according to the present invention;

6 is a schematic diagram of setting a DCTS in a multi-physical frame;

FIG. 7 is a schematic diagram showing the timing of transmitting and receiving the SBS air interface before the SBS is started when only the DCTS is set;

Figure 8 is a schematic diagram of the specific working process of the SBS during the initialization process;

FIG. 9 is a schematic diagram of a specific working process of a terminal in an overlapping area between an SBS and a WBS in an SBS initialization process; FIG. 10 is a schematic diagram of a specific working process of a TOS in an SBS initialization process;

11 is a schematic diagram of setting a pair of UCTS and DCTS in multiple frames;

12 is a schematic diagram of setting UCTS and DCTS in different frames in multiple frames;

FIG. 13 is a schematic diagram of the air interface transmission and reception timing of the SBS during the SBS startup process when only the DCTS is set; FIG. 14 is a schematic diagram of the air interface transmission and reception timing of the SBS during the SBS startup process when the DCTS and the UCTS are simultaneously set; FIG. 15 is started in the SBS. After completion, the SBS air interface occupation diagram;

16 is a schematic diagram of a coexistence base station network according to an embodiment of the present invention;

FIG. 17 is a schematic diagram of a network topology structure according to an embodiment of the present invention; FIG.

FIG. 18 is a schematic diagram of an interaction process between SBS1, terminal A, and WBS1 according to an embodiment of the present invention; FIG. 19 is a schematic diagram of a coexistence base station network according to another embodiment of the present invention;

20 is a schematic diagram of a network topology structure according to another embodiment of the present invention;

FIG. 21 is a schematic diagram of an interaction process between SBS1, terminal A, and WBS1 in another embodiment of the present invention. 'The way of implementing the invention

The present invention provides a method for coexistence base stations to discover neighboring stations and establish contact with neighboring stations upon initialization. The core of the present invention is: in the downlink frame structure of the coexistence base station, a downlink dedicated time slice DCTS is opened, which is specifically used for information interaction with terminals in the overlapping area of the neighboring station, according to the interaction of the information, Get neighbors Station contact information.

The location that the DCTS may specifically define includes: any time position in the original downlink frame format, where the time position adjacent to the beginning or end of the original downlink frame format portion is included, and, of course, when the DCTS is set to When the time position adjacent to the beginning or end of the original downlink frame format portion is left, the portion of the time slice that needs to be adjacent to the original frame format retains a guard time interval.

The present invention will be described in detail below with reference to the accompanying drawings. The specific processing flow of the method of the present invention is as shown in FIG. 4, and includes the following steps:

Step 4-1: In the downlink frame structure channel of the coexistence base station, a downlink dedicated time slice DCTS is opened. The present invention firstly needs to define a DCTS (downlink coexistence dedicated time slice) in the DL (downstream) part of the original frame format of the coexistence base station, where the time position adjacent to the beginning or end of the original downlink frame format portion is included, and The time position and time slice length at which the time slice is located must be easily known and unified by all relevant base stations. The starting point and length can be fixed and unified under certain frequency bands in a certain country area, so that the base station can initiate the contact request in an accurate time when starting.

For example, the time slice is set to a fixed length time slice at a fixed position after the start position of the frame, as shown in FIG. The time slice may not be set in every frame, and all the frames may be uniformly labeled, and the DCTS is set only on a regular part of the frame, as shown in FIG. 6. After numbering frames of all base stations, DCTS is set on each frame whose frame number can be divisible by N.

The DCTS is used to send an initialization message to the SBS. Therefore, before the SBS is started, the time slice is idle and is not occupied by the base station. At this point, the SBS air interface transmission and reception timing diagram is shown in Figure 7.

Step 4-2. The newly activated base station (SBS) uses the DCTS to issue a contact request to the terminal in the overlapping area with the adjacent station (TOS).

In this method, the specific working process of the SBS (newly activated base station) in the initialization process is as shown in FIG. 8, and the specific description is as follows:

After the SBS (newly activated base station) is powered on, it first completes the initialization of its wired part, such as obtaining an IP address. Then select the target channel. Detecting whether there is interference on the target channel. If there is no interference, it indicates that there is no interference between the base station and the neighboring station in the overlapping area, and the independent default configuration initialization procedure is started. If there is interference, the base station and the neighbor are There is a valid terminal in the overlapping area of the station, and then the timing information of the DCTS is obtained through the global timing information. And transmitting, in the DCTS time, a contact request message to the neighboring base station to the active terminal, where the message contains information required by the neighboring station to contact the SBS.

In the process described above, the process of detecting the target channel is optional. Specifically, since the effective terminal is likely to have limited transmission power when the SBS is started due to the communication requirement, it is possible that the SBS may interfere with the signal reception of the terminal but the SBS may not detect the transmission signal of the terminal, so the process of detecting the target channel is optional. Step 4: 3. The terminal in the overlapping area between the SBS and the WBS submits the received contact request message to the WBS to which the terminal belongs.

In this method, the specific working process of the terminal in the overlapping area between the SBS and the WBS in the SBS initialization process is as shown in FIG. 9, and the specific description is as follows:

The terminal in the overlapping area between the SBS and the TOS listens to the signal on the DCTS time slice while receiving the normal data, and reports the received message to the original base station (WBS) upon receiving the contact request of the base station (SBS). .

The terminal may directly send the original bandwidth allocated to the original base station (WBS), or may send a request to report the coexistence message first, and then wait for the WBS indication, if the WBS indication is received. If the terminal can report the request, it reports the valid information in all the contact request messages received.

Since the uplink bandwidth is allocated on demand, the terminal does not necessarily have sufficient uplink bandwidth. In principle, the user of the terminal needs to pay for a larger amount of traffic, and the traffic is used for the base station, so the application is applied. And the way of reporting is more reasonable. In this way, the base station can allocate a free reporting bandwidth for the terminal that needs to be reported.

Step 4 4. The WBS sends a contact message to the SBS using the wired network or the contact terminal according to the received contact request. In the method, the specific working process of the WBS in the SBS initialization process is as shown in FIG. 10, and the specific description is as follows: If the working coexistence base station WBS receives the request for reporting the coexistence message reported by the subordinate terminal, All the report requests received in a period of time are allocated uplink bandwidth to the reporting terminal in a certain order, and then instruct the terminal to report the contact request messages obtained by the terminal, and the contact request messages contain the necessary information of the wired contact SBS. Of course, the WBS can also receive the message that the terminal directly reports the remaining bandwidth without being requested.

After receiving the contact request information, the WBS can initiate a contact message to the SBS through a cable between the coexisting base stations.

When the WBS is an independent network or the WBS cannot interact with the SBS through the wired core network, the WBS may also designate a contact terminal, and then initiate a contact message to the SBS through the contact terminal.

In this case, a UCTS (uplink coexistence dedicated time slice) is also defined in the UL (upstream) part of the original frame format of the coexisting base station, and the UCTS and DCTS time slices may not be set in each frame, and all frames may be used. Uniform labeling, DCTS and UCTS are only determined on a regular part of the frame; DCTS can be configured on some frames, and UCTS is provided on some frames, for example, after frame numbering for all base stations, for every N frames (N is a natural number) A DCTS and UCTS are given, such as a frame (0, N, 2N, 3N-. . . ) that is divisible by the frame number; and, for example, a DCTS is given to a frame that can be divisible by N, and the remainder is divided by N. The UCTS is given on the frame.

A schematic diagram of setting a pair of UCTS and DCTS in multiple frames is shown in FIG. 11, and a schematic diagram of setting UCTS and DCTS in different frames in multiple frames is shown in FIG.

Then, after the terminal reports the contact request message to the WBS, the WBS can designate it as the CLSS (Coexistence Contact Terminal) with the SBS. At this time, the base station WBS sends a contact indication, instructing the CLSS to use the UCTS to send the message to the SBS. Coexistence Sexual negotiation signaling. After receiving the indication, the terminal buffers other signaling that needs to be sent, and uses the UCTS to send a corresponding contact message to the SBS as required.

If the terminal is not designated as CLSS, the terminal will continue to monitor the signal on the DCTS time slice. The CLSS is selected by the WBS and can be temporary. For example, each message specifies a CLSS, or it can be fixed for a period of time. It can specify a CLSS for a pair of WBS and SBS connections, or multiple CLSSs at the same time.

The above-mentioned messages sent to the WBS and sent by the SBS can use the ARQ mechanism (Automatic Retransmission Request).

In the SBS startup process described above, when only the DCTS is set, the timing diagram of the air interface transmission and reception of the SBS is as shown in FIG.

In the SBS startup process described above, when DCTS and UCTS are set at the same time, the timing diagram of the air interface transmission and reception of the SBS is as shown in FIG. 14.

Step 4: After the SBS receives the contact message from the WBS, the SBS and the TOS complete mutual coexistence configuration, and the two parties establish an effective contact communication. '

After the SBS sends a contact request to the terminal in the overlapping area with the WBS by using the DCTS, it waits for the contact message returned by the WBS (possibly more).

If the SBS receives the contact information sent by the neighboring station TOS through the wired mode within the specified time, the communication interaction with the neighboring station is initiated, and the two parties establish an effective wired connection to complete the coexistence negotiation and configuration of the local station and the neighboring station. And carry on the subsequent communication interaction, after the SBS completes the initialization, it starts to work normally and becomes the WBS.

If the SBS receives the contact information sent by the CLSS through the UCTS within the specified time, initiates the communication interaction with the neighboring station (the base station to which the CLSS belongs), and completes the coexistence negotiation and configuration of the local station and the neighboring station by using the DCTS and the UCTS. And the subsequent communication interaction, the SBS starts the normal work of the base station after the initialization is completed, and becomes the WBS.

If the SBS does not receive the contact information within the specified time, the DCTS contact request can be resent. After repeating the above process several times and still not obtaining the neighbor message, the default configuration initialization scheme is started, and the SBS starts the normal operation of the base station after the initialization is completed, and becomes the WBS.

After the SBS is started, the DCTS and UCTS will be idle again. The air interface occupation of the SBS is shown in Figure 15. The present invention further provides an embodiment of the method according to the present invention. The coexistence base station network shown in FIG. 16 is taken as an example, and the network topology is as shown in FIG. 17.

Each base station is connected by a wired network. Each base station has its own terminal connected below it. The A/B/E/G terminal is connected under WBS1, the C/F terminal is hung under WBS2, and D/H is hung under WBS3. terminal. (The terminal connected to SBS1 cannot be initialized before SBS1 works normally.) The corresponding terminal in the coverage area of SBS1 has A/B/C/D, and G is in the coverage of WBS2 at the same time. However, before completing the coexistence contact, SBS1 could not know the wired contact information of the neighboring station, such as the IP address. In the startup process of SBS1, according to the method of the present invention, the interaction processing between SBS1, terminal A and WBS1 is as shown in FIG. The specific process is as follows:

1. SBS1 starts and completes the wired part initialization, obtains the information for wired connection with the neighboring station, such as the IP address of the local station, selects the wireless channel, and then uses DCTS to send the contact to all the terminals (including terminal A) reachable by the air interface. Requesting a message, the contact request message includes information such as an IP address of SBS 1;

2. The terminal A intercepts the contact request message and its affiliate information, and sends a coexistence message report request to the original base station WBS1. The qualified terminal that receives the contact request message on the DCTS sends a coexistence message report request to the WBS1 to which the terminal belongs. ;

3. After the WBS1 learns the report request, it allocates the bandwidth for reporting the coexistence message to the designated terminal and specifies that it performs coexistence message reporting. For example, if both terminals A and B apply for coexistence message reporting, WBS1 can specify that A reports it. The coexistence message can also report all the terminals that apply for reporting in order;

4. After receiving the report indication, the terminal A reports the obtained contact request message sent by the SBS1 to the WBS1;

5. After receiving the contact request message reported by the terminal A, the WBS1 sends a contact message to the SBS1 through the wired network according to the obtained wired contact information (such as an IP address, etc.);

6. SBS1 learns the contact method with the neighboring station WBS1 from the message, and then sends a contact message to the WBS1 through the wired network. After the WBS1 receives the contact message of the SBS1 again from the cable, the SBS1 and the WBS1 are established. Wired contact. The two parties can then begin various information interactions, including coexistence negotiations.

Take the coexistence base station network shown in Figure 19 as an example, and its network topology is shown in Figure 20.

The base stations WBS2 and WBS3 are connected by a wired network, and SBS1 and WBS1 cannot implement wired network interworking. Before the wireless side interface completes the coexistence contact, SBS1 cannot know the specific contact mode of the neighboring station. Each base station has its own terminal connected below, and the A/B/E/G terminal is hung under WBS1. G is in the coverage of TOS2 at the same time. The C/F terminal is hung under TOS2, and the D/H terminal is hung under WBS3. The corresponding terminal in the coverage of SBS1 has A/B/C/D, and the terminal connected under SBS1 cannot be initialized before SBS1 works normally.

During the startup process of SBS1, the interaction process between SBS1, terminal A and WBS1 is as shown in Fig. 21 according to the method of the present invention. The specific process is as follows -

1. SBS1 starts and completes some initialization of the cable and some parts of itself, and obtains some necessary information for connecting with the neighboring station, such as the site ID of the station, selects the wireless channel, and then uses the DCTS to reach all the terminals that are available to the air interface (including the terminal). A) sending a contact request message, where the contact request message includes information such as the ID of the SBS1;

2. The terminal A intercepts the contact request message and its affiliate information, and sends a coexistence message report request to the original base station WBS1. The qualified terminal that receives the contact request message on the DCTS sends a coexistence message report request to the WBS1 to which the terminal belongs. ; '

3. After the TOS1 learns the report request, it allocates the bandwidth for reporting the coexistence message to the designated terminal and specifies that it coexists. The message is reported, for example, if both A and B terminals apply for coexistence message reporting, and WBS1 can specify A to report the coexistence message it receives, it can also report all the terminals that apply for reporting in sequence;

4. After receiving the report indication, the terminal A reports the contact request message sent by the obtained SBS1 to the WBS1;

5. The WBS selects one or more reporting terminals as coexistence contact terminals (CLSS) according to the received information, and instructs it to forward the signaling of the coexistence contact by using the UCTS through a normal downlink channel.

6. After receiving the contact message sent by the WBS, the CLSS sends the contact message to the SBS by using the UCTS;

7. The SBS learns the contact message of the neighboring WBS from the contact message forwarded by the CLSS, and then uses the DCTS to send the coexistence message to the CLSS;

8. The CLSS will report the coexistence message received by the SBS and send it to the WBS. An effective wireless connection has been established between SBS and WBS. The two parties can then begin the exchange of information, including coexistence negotiations.

The present invention also provides an alternative to the present invention: using a Ranging Slot in an existing protocol or a UCTS according to the present invention to cause a terminal to transmit an interrogation signal to a base station outside the original base station in turn. The inquiry signal or mechanism carries the contact information of the original base station of the terminal, such as an IP address. The base station SBS. or WBS that received the signal will obtain the contact information of the original base station of the terminal. However, this solution will increase the burden of Ranging Slot ranging slots, and it is necessary to coordinate the Ranging slot ranging slots uniformly between stations. .

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or within the technical scope disclosed by the present invention. Alternatives are intended to be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

Rights request

A method for discovering a neighboring station and establishing a contact with a neighboring station by the coexistence base station at the time of initialization, characterized in that it comprises:

B. The newly activated base station actively sends a contact request message to the terminal in the overlapping area with the neighboring station by using the DCTS, and discovers the neighboring station according to the contact information carried by the returned contact message and establishes contact with the neighboring station.

2. The method for discovering a neighboring station and establishing a liaison with a neighboring station by the coexistence base station according to claim 1, wherein the location defined by the DCTS comprises:

The method as claimed in claim 1, wherein the coexistence base station finds a neighboring station and establishes a contact with the neighboring station at the time of initialization, wherein the step A specifically includes:

One DCTS is set in the downlink frame of each coexistence base station, or only one DCTS is set in the downlink frame of the coexistence base station that satisfies the set condition.

The method of claim 3, wherein the coexistence base station finds a neighboring station and establishes a contact with the neighboring station according to claim 3, wherein the step A further comprises:

In a certain area, the time starting point and the duration of the DCTS are fixed and unified under the conditions of each frequency band.

The method as claimed in claim 1, 2, 3 or 4, wherein the coexistence base station finds a neighboring station and establishes a connection with the neighboring station, and the step B includes:

The method for discovering a neighboring station and establishing a contact with a neighboring station by the coexistence base station according to claim 5, wherein the step B1 specifically includes -

ΒΠ, the newly activated base station uses the DCTS to send a contact request message including the contact information of the newly activated base station to the terminal in the overlapping area with the neighboring station; B12. The terminal sends a request for reporting a coexistence message to the neighboring station to which the terminal belongs, and after receiving the report that can be reported by the neighboring station, the terminal submits the received contact request message to the neighboring station. .

The method for discovering a neighboring station and establishing a communication with a neighboring station by the coexistence base station according to claim 6, wherein the step B12 further comprises: the terminal using the remaining bandwidth originally allocated by the terminal, directly Submit the received contact request message to the neighboring station.

The method of claim 5, wherein the step B2 comprises:

B21, when the newly activated base station and the neighboring station to which the terminal belongs can be interconnected by wire, the neighboring station returns a contact message to the newly activated base station by using a wired path;

B22. After receiving the contact message, the newly activated base station initiates communication interaction with the neighboring station, and the two parties establish an effective wired connection.

The method of claim 5, wherein the step B2 specifically includes:

The method of claim 9, wherein the step B23 includes:

One UCTS is set in the uplink frame of each coexistence base station, or only one UCTS is set in the uplink frame of the coexistence base station that satisfies the set condition.

The method of claim 10, wherein the coexistence base station finds a neighboring station and establishes a liaison with the neighboring station according to claim 10, wherein the step B23 further includes:

In a certain area, the time starting point and the duration of the UCTS are fixed and unified under the conditions of each frequency band.

12. The method for discovering a neighboring station and establishing a contact with a neighboring station by the coexistence base station at the time of initialization according to claim 9. The method is characterized in that: the step B24 includes:

13. A method for coexisting a base station to discover a neighboring station and establish a contact with a neighboring station at initialization, characterized in that:

C. Using the ranging slot Ranging Slot in the protocol or one UCTS set in the uplink frame of each coexistence base station, let the terminal transmit the interrogation signal to the base station outside the original base station in turn, and the bearer terminal in the interrogation signal Contact information of the original base station;

14. The method of claim 13, wherein the coexistence base station finds a neighboring station and establishes a liaison with the neighboring station according to claim 13, wherein the step C further comprises: