WO1997013353B1 - Communication system and method - Google Patents

Communication system and method

Info

Publication number
WO1997013353B1
WO1997013353B1 PCT/US1996/015190 US9615190W WO9713353B1 WO 1997013353 B1 WO1997013353 B1 WO 1997013353B1 US 9615190 W US9615190 W US 9615190W WO 9713353 B1 WO9713353 B1 WO 9713353B1
Authority
WO
WIPO (PCT)
Prior art keywords
base station
user
information
messages
signaling
Prior art date
Application number
PCT/US1996/015190
Other languages
French (fr)
Other versions
WO1997013353A1 (en
WO1997013353A9 (en
Filing date
Publication date
Priority claimed from US08/532,466 external-priority patent/US6021333A/en
Priority claimed from US08/610,193 external-priority patent/US6094575A/en
Application filed filed Critical
Priority to EP96933857A priority Critical patent/EP0873641A4/en
Priority to AU72430/96A priority patent/AU7243096A/en
Publication of WO1997013353A1 publication Critical patent/WO1997013353A1/en
Publication of WO1997013353B1 publication Critical patent/WO1997013353B1/en
Publication of WO1997013353A9 publication Critical patent/WO1997013353A9/en

Links

Abstract

A mobile communication system (101) having a layered architecture (401) communicates user and signaling data (1105) among components of the communication system in the form of information elements which are encapsulated within packets (1005) which may be passed across one or more system interfaces (1401). The mobile communication system comprises mobile user stations (102), base stations (104), and base station controllers (105) and operates as a transparent data pipeline between application end users, such as a telephone service (126), connected at base station controllers (105) and mobile user stations (102). In a particular embodiment, the interface between the base station (104) and the user stations (102) is a TDMA interface, and signaling traffic between the base station (104) and each of the user stations (102) is conducted in either a fast control traffic mode or a slow control traffic mode. In the fast control traffic mode, signaling messages are exchanged between the base station (104) and a user station (102) in a plurality of time slots (302) within a timespan of a single time frame (301); in the slow control traffic mode, signaling messages are exchanged between the base station (104) and a user station (102) in no more than a single time slot (302) within a timespan of a single time frame (301).

Claims

AMENDED CLAIMS
[received by the International Bureau on 19 May 1997 (19.05.97) ; original claims 1, 7, 10, 12, 22, 23, 25, 27 and 28 amended ; new claims 49-53 added ; remaining claims unchanged (11 pages)]
1. A system for transferring information within a communication system, comprising a base station comprising a transceiver and a backhaul interface element, said transceiver capable of communicating with a plurality of user stations, one in each of a plurality of time slots of a time frame, a base station controller coupled to said backhaul interface element, and an interface coupled between said transceiver and said backhaul interface element, said interface housed within said base station, said interface comprising memory capable of storing information received from sa d user stations and capable of being accesseα by said backhaul interface element, and said memory capable of storing information received from said base station controller and capable of being accessed by said transceiver.
2. The system of claim 1 wherein sa d interface comprises a dual-port random access memory.
3. The system of claim 2 further comprising a plurality pf prioritized queues, each of said prioritized queues located m a designated portion of said dual-port random access memory.
4. The system of claim 3 wherein a signaling message received by said transceiver is selectively placed in one of said prioritized queues.
5. The system of claim 3 wherein said prioritized queues are three in number.
6. The system of claim 1 wherein said backhaul interface element comprises a line card processor. 7. A base station [interface] comprising a transceiver capable of communicating using a time division multiple access technique with a plurality of user stations in each of a plurality time slots of a time frame, said transceiver comprising a transceiver processor, a backhaul interface element, said backhaul interface element comprising a backhaul interface processor, and a dual-port RAM coupled between said transceiver and said backhaul interface element, said dual-port RAM comprising a first memory portion, and a second memory portion.
8. The base station interface of claim 7 wherein said dual-port RAM comprises a plurality of queues according to a relative priority of each signaling message.
9. The base station interface of claim 8 wherein signaling messages are stored in said queues according to a relative priority of each signaling message.
10. The base station interface of claim 7 further comprising a base station controller coupled to said backhaul interface element.
11. The base station of claim 7 wherein said base station communicates with said user stations using spread spectrum communication .
12. A system for transporting messages in a mobile communication system, comprising a plurality of user stations, a plurality of base stations each comprising a backhaul interface element and a transceiver capable of carrying out time division multiple access communication with said user stations, a base station controller coupled to said backhaul interface element in each of said plurality of base stations, an internal interface within each base station, coupling said oackhaul interface element to said transceiver, a first set of messages for communicating signaling and user information between said plurality of user stations and said base stations, a second set of messages for communicating said signaling and user information across said internal interface, and a third set of messages for communicating said signaling and user information from said base stations to said base station controller.
13. The system of claim 12 wherein messages from said first set of messages are transmitted in information packets including a header field, a bearer field, and a byte-serial field.
1 . The system of claim 13 wherein a message from said first set of messages is sent either within said bearer field m a single one of said information packets, or within said byte- serial field over a plurality of said information packets.
15. The system of claim 12 wherein messages from said second set of messages are stored in a shared memory accessible by said backhaul interface element and said transceiver.
16. The system of claim 15 wherein a first message from said second set of messages is derived from a second message from said first set of messages or said third set of messages.
17. The system of claim 12 wherein messages from said third set of messages are transmitted in data frames comprising an opening flag, an address field, a control field, and an information field.
18. The system of claim 15 wherein a message from said third set of messages s sent within said information field in a single one of said data frames.
19. The system of claim 12 wherein messages from said second set of messages is sent in the same format as messages from said third set of messages.
20. The system of claim 12 wherein said base stations communicate with said user stations using direct sequence spread spectrum communication.
21. The system of claim 12 wherein said base station controller is connected to a telephone network.
22. A communication system comprising a plurality of communication channels, each of said channels defined by a time slot from a plurality of time slots and a code from a plurality of codes, a base station comprising a transceiver and a line card processor housed therein, a plurality of user stations, each capable of communicating with said base station over one of said communication channels, an interface housed within said base station, said interface comprising a shared memory between said transceiver and said line card processor, a base station controller coupled to said line card processor, whereby information is transported between said base station controller and said user stations by way of said line card processor, said internal interface and said transceiver.
23. The communication system of claim 22 further comprising a plurality of base stations coupled to said base station controller .
24. The communication system of claim 22 wherein said shared memory comprises a dual-port RAM. 25. A method for transferring information withm a wireless communication system, comprising the steps of denning a continuous series of time frames, defining a plurality of time slots in each time frame, whereby one of a plurality of user stations may communicate with a base station in each one of said time slots, receiving a signaling message to be communicated between a base station and one of a plurality of user stations, and transmitting in a designated time slot of said plurality of time slots, using a spread spectrum technique, an information packet between said one user station and said base station, said information packet having a header flag set to a first value to indicate that said signaling message is contained in a first field, and set to a second value to indicate that a segment of said signaling message is contained in a second field smaller than said first field.
26. The method of claim 25 further comprising the step of, where said header flag was set to said second value, transmitting in said αesignated time slot and using a spread spectrum technique additional information packets in subsequent time frames, each of said additional information packets containing a different segment of said signaling message, until the entirety of said signaling message has been transmitted between said base station and said one user station.
27. The method of claim 25 wherein said first field s used for sending bearer data when not used for sending said signaling message .
28. The method of claim 25 further comprising the step of storing saiα signaling message in a queue in said base station.
29. A communication system comprising a base station, said base station comprising a base station transceiver; a plurality of user stations comprising a user station transceiver for communication with said base station over a base station to user station interface, said base station and said user station comprising circuitry for establishing a time frame comprising a plurality of time slots; a base station controller in communication with said base station through a base station to base station controller interface; a dual access memory comprising a first input and a second input, said first input coupled to said base station to base station controller interface and said second input coupled to said base station to user station interface, control traffic signals are communicated across said base station to user station interface, said control traffic signals comprising a fast traffic control mode and a slow traffic control mode; said fast control traffic mode comprising an exchange of signals across said base station to user station interface in a plurality of time slots within a timespan of a single time frame and said slow control traffic mode comprising an exchange of signals across said base station to user station interface a maximum of once per time frame and wherein said exchange of signals across said base station to user station interface in said slow control traffic mode need not occur in every successive ti eframe .
30. The communication system of claim 30 wherein said exchange of signaling messages within a specific time frame in said fast control traffic mode comprises a base station transmission comprising information directing said user station to exchange signals in said slow control traffic mode.
31. The communication system of claim 30 wherein said base station transmission is responsive to a user station transmission, said user station transmission comprising a signaling message comprising information requesting said base station to exchange signals in said slow control traffic mode. 32. The communication system of claim 29 wherein said control traffic signals comprise a message in said slow control traffic mode including information for setting the rate of said exchange of signaling messages over a number of consecutive time frames .
33. The communication system of claim 29 wherein said traffic control signals exchanged within a single time frame in said fast control traffic mode comprises a base station transmission comprising information for determining the quantity and position of time slots to be used for said exchange of signaling messages in said fast control mode.
34. A communication system for supporting a low rate continuous signaling link, comprising a base station, a first user station wherein said first user station and said base station periodically exchange control traffic information using a periodic time frame, said periodic time frame comprising one or more time slots, said periodic exchange of control traffic information occurring in a single time slot within a time frame, and said periodic exchange of control traffic information occurring no more frequently than once every other time frame.
35. The communication system of claim 34 wherein said exchange of control traffic information comprises a base station transmission comprising information for adjusting said frequency of said exchange of control traffic information.
36. The communication system of claim 34 further comprising a second user station which periodically exchanges control traffic information with said base station, wherein said periodic exchange of control traffic information between said base station and said second user station occurs in the same time slot as said time slot used by said first user station and said base station, and wherein said periodic exchange of control traffic information between said base station and said second user station occurs m a periodic time frame different from said periodic time frame wherein said periodic exchange of control traffic information between said base station and said first user station occurs.
37. The communication system of claim 34 wherein the number of consecutive time frames m which said periodic exchange of control traffic information does not occur is not greater than thirty-one.
38. A communication system using a slow control traffic mode, comprising a base station, and a plurality of user stations, wherein each of said user stations exchanges signaling information with said base station in a single time slot within a periodic t me frame, and wherein said exchange of signaling information between said base station and each respective user station occurs no more frequently than every other periodic time frame.
39. The communication system of claim 38 wherein at least two of said user stations alternately exchange signaling information with said base station using the same time slot in a different time frame.
40. The communication system of claim 39 wherein the number of said user stations exceeds the number of available time slots within said periodic time frame.
41. A communication system for dynamically varying the transmission of signaling information, comprising a base station, a user station, and 357
a signaling link between said base station and said user station, said signaling link comprising a first exchange of signaling information between said base station and said user station in a plurality of time slots in a first periodic time frame, wherein said first exchange of signaling information comprises a base station transmission comprising information data for determining the number and position of time slots to be used in a second time frame for a second exchange of signaling information.
42. The communication system of claim 41 further comprising a second exchange of signaling information between said base station and said user station in a second time frame using said time slots determined by said information data in said base station transmission in said first time frame.
43. The communication system of claim 42 wherein said number of said time slots used for said second exchange of signaling information in said second time frame is greater than the number of said time slots used for said first exchange of signaling information in said first time frame.
44. A method for establishing a low rate continuous signaling link between a base station and a user station in a communication system, comprising the steps of transmitting in one or more time slots within a periodic time frame a first transmission from said base station to said user station, said transmission comprising a signaling message comprising both a command for said user station to acknowledge entry into said signaling link and data specifying the rate of exchange of signaling messages over a fixed number of time frames in said signaling link, receiving said first base station transmission at said user station, transmitting from said user station in one or more time slots within said time frame a user transmission comprising an acknowledgment of said command by said base station, receiving said user station transmission at said base station, and exchanging signaling messages periodically between said base station and said user station over the course of a plurality of time frames, said periodic exchange of said signaling messages occurring at said rate specified by said base station.
45. The method of claim 44 further comprising the step of transmitting from said base station within a time frame during said signaling link a signaling message which varies said rate of said periodic exchange of said signaling messages in said signaling link, said rate-varying signaling message comprising information specifying a new rate.
46. The method of claim 44 further comprising the step of transmitting from said base station within a time frame during said signaling link a signaling message which varies the slot position used by said base station and said user station for said exchange of signaling messages in said signaling link, said slot- position-varying signaling message comprising information specifying a new slot position.
47. A method for accelerating signaling information over a communication interface, said interface comprising a plurality of control messages transmitted and received by a base station and a user station in one or more time slots within a periodic time frame, comprising the steps of exchanging control messages between said base station and said user station in one or more slot positions in a first time frame, during said exchange in said first time frame, transmitting from said base station a control message comprising information for designating a plurality of available slot positions to be used for a second exchange in a succeeding time frame, and exchanging control messages between said base station and said user station in said designated slot positions in said succeeding time frame.
48. The method of claim 47, wherein a quantity of said designated plurality of slot positions in said subsequent time frame is greater than quantity of said one or more slot positions in said first frame.
49. A method for transferring information within a base station used in wireless communication comprising: transmitting a plurality of messages in an order from a first element in the base station; storing the plurality of messages transmitted by the first element in a memory; and retrieving a message of the plurality of messages from the memory by a second element in the base station without regard to the order.
50. The method of claim 49 wherein the first element is a transceiver and the second element is a backhaul interface.
51. The method of claim 49 wherein the first element is a backhaul interface and the second element is a transceiver.
52. The method of claim 49 wherein the step of storing the plurality of messages comprises a step of storing the plurality of messages in a random access memory.
53. The method of claim 49 wherein the step of storing the plurality of messages comprises a step of storing the plurality of messages in a priority queue of the memory depending on the relative priority of the message. 360
STATEMENT UNDER ARTICLE 19
Pursuant to PCT Article 19 and Rule 46.4(a) Applicants hereby present arguments concerning the applicability of PCT Rule 33 to the pending claims.
Claim 1 as amended recites amongst other things, "an interface coupled between said transceiver and said backhaul interface element, said interface housed within said base station, said interface comprising memory capable of storing information received from said user stations and capable of Demg accessed by saiα backhaul interface element, and said memory capable of storing information received from said base station controller and capable of being accessed by said transceiver." None of the cited references teach or suggest th s element. Therefore, claim 1 as amended has both novelty and inventive step.
Further, there is nothing in Dillworth (U.S. Patent No. 5,497,400) relating to a "backhaul interface element" and nothing in either Dillworth or Rinnback (U.S. Patent No. 5,555,200) that would suggest the addition of a backhaul interface element to the system in Rinnback. Similarly, there is nothing to suggest a combination of the system in Rinnback or Dillworth with Nazarenko (U.S. Patent No. 5,512,724) . Therefore, the combination of Rmnbach, Dillworth and Nazarenko with respect to the pending claims is improper.
New independent claim 49 recites amongst other things a step of retrieving a message of the plurality of messages from the memory by a second element in the base station without regard to an order of receipt of the plurality of messages. This step is not taught or disclosed by the cited references either individually or in their combination. Therefore, claim 29 has both novelty and inventive step over the cited references.
Claims 50-53 are dependent on claim 49 and therefore, it is respectfully submitted, have both novelty and inventive step by virtue of their dependency on claim 49.
PCT/US1996/015190 1995-09-22 1996-09-20 Communication system and method WO1997013353A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP96933857A EP0873641A4 (en) 1995-09-22 1996-09-20 Communication system and method
AU72430/96A AU7243096A (en) 1995-09-22 1996-09-20 Communication system and method

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US08/532,466 1995-09-22
US08/532,466 US6021333A (en) 1993-11-01 1995-09-22 Method and system for transferring information within a mobile communication system
US08/610,193 1996-03-04
US08/610,193 US6094575A (en) 1993-11-01 1996-03-04 Communication system and method

Publications (3)

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WO1997013353A1 WO1997013353A1 (en) 1997-04-10
WO1997013353B1 true WO1997013353B1 (en) 1997-06-19
WO1997013353A9 WO1997013353A9 (en) 1997-10-16

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US (1) US6094575A (en)
EP (2) EP0873641A4 (en)
AR (1) AR003690A1 (en)
AU (1) AU7243096A (en)
WO (1) WO1997013353A1 (en)

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