System and method for bandwidth reservation protocol for spatial reuse in a wireless communication network

• US 8,355,387 B2
• Filed: 07/24/2008
• Issued: 01/15/2013
• Est. Priority Date: 07/24/2008
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Qin, Xiangping, Xia, Pengfei, Ngo, Chiu
• Primary Examiner(s): Ngo, Ricky
• Assistant Examiner(s): Chang, Richard K
• Application Number:
  US12/179,457
• Publication Number:
  US 20100020770A1
• Time in Patent Office: 1,636 Days
• Field of Search: 370/336, 370/468, 4554521- 2
• US Class Current: 370/336
• CPC Class Codes: H04N 21/2381 Adapting the multiplex stream to a specific network, e.g. an Internet Protocol [IP] network transmission of MPEG streams over ATM H04L12/5601
• CPC Class Codes: H04N 21/2383 Channel coding or modulation of digital bit-stream, e.g. QPSK modulation arrangements for detecting or preventing errors in the information received by adapting the channel coding H04L1/0009; analogue front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002
• CPC Class Codes: H04N 21/2385 Channel allocation H04N21/266 takes precedence; Bandwidth allocation H04N21/24 takes precedence ; allocation of channels according to the instantaneous demands of the users in time-division multiplex systems H04J3/1682; admission control, resource allocation in open networks H04L12/5692; arrangements for maintenance or administration in data switching networks involving bandwidth and capacity management H04L41/0896; negotiating bandwidth in wireless networks H04W28/16
• CPC Class Codes: H04N 21/2402 Monitoring of the downstream path of the transmission network, e.g. bandwidth available traffic monitoring in data switching networks H04L43/00; monitoring data switching networks utilization H04L43/0876
• CPC Class Codes: H04N 21/2408 Monitoring of the upstream path of the transmission network, e.g. client requests monitoring data switching networks utilization H04L43/0876; scheduling or organising the servicing of application requests H04L67/60
• CPC Class Codes: H04N 21/44209 Monitoring of downstream path of the transmission network originating from a server, e.g. bandwidth variations of a wireless network arrangements for maintenance or administration in data switching networks involving bandwidth and capacity management H04L41/0896
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: H04W 74/0816 with collision avoidance

Abstract

A system and method for providing spatial reuse in a wireless network for communicating compressed and uncompressed audio/video is disclosed. A bandwidth reservation request for data communication with a receiver to a coordinator is transmitted. A first response indicating availability of the receiver for the data communication is received. A channel is listened to by a station for channel busy indication (CBI) messages transmitted by other stations in the wireless network. A local channel occupation report comprising data indicative of one or more time periods during which one or more other stations in the wireless network are scheduled to transmit data messages is transmitted to the coordinator. A second response comprising data indicative of one or more allocated channel time slots is received. Audio and/or video (A/V) data is transmitted to the receiver during the allocated channel time slots.

Claims

1. A method of providing spatial reuse in a wireless network for communicating compressed or uncompressed video/audio, the method comprising:

transmitting a bandwidth reservation request for data communication with a receiver to a coordinator;

receiving a first response indicating availability of the receiver for the data communication;

listening to a local channel for channel busy indication (CBI) messages transmitted by other stations in the wireless network;

forming a local channel occupation report by the receiver based on the CBI messages, wherein the local channel occupation report comprising data indicative of one or more time periods during which one or more stations in the wireless network other than the receiver are scheduled to transmit data messages to the coordinator that can interfere with data communication by the receiver;

transmitting the local channel occupation report from the receiver to the coordinator;

receiving a second response comprising data indicative of one or more allocated channel time slots scheduled by the coordinator based on the local channel occupation report; and

simultaneously transmitting audio and/or video (A/V) data by multiple stations to the receiver during the one or more allocated channel time slots while sharing a same frequency band channel.

2. The method of claim 1, wherein at least one of the allocated channel time slots is also allocated for other non-interfering stations in the wireless network.

3. The method of claim 1, wherein the bandwidth reservation request is transmitted during a contention period of a superframe.

4. The method of claim 1, wherein the first response comprises data indicative of a time period reserved for antenna training.

5. The method of claim 1, further comprising performing iterative antenna training at a time period reserved for antenna training.

6. The method of claim 1, wherein the CBI messages comprise a Request-To-Send (RTS) message.

7. The method of claim 1, wherein the CBI messages comprise a Clear-To-Send (CTS) message.

8. The method of claim 1, wherein the available channel time slots comprise one or more channel time blocks (CTBs).

9. The method of claim 1, further comprising periodically transmitting RTS messages.

10. The method of claim 1, wherein time slots previously allocated for transmission by the stations in the wireless network other than the receiver are determined for receiving A/V data by the receiver without interference from the stations in the wireless network other than the receiver.

11. The method of claim 1, wherein the time slots previously allocated for transmission by the stations in the wireless network other than the receiver are reused for the receiver.

12. The method of claim 1, wherein the local channel occupation report is used by the coordinator for scheduling transmission for spatial reuse by multiple stations on a same frequency channel during the one or more allocated channel time slots.

13. The method of claim 1, wherein each of the multiple stations forms a local channel occupation report and transmits the local channel occupation report to the coordinator.

14. The method of claim 1, wherein the receiver only receives CBI messages transmitted by a portion of the other stations in the wireless network due to a geometrical arrangement of the other stations in the wireless network.

15. The method of claim 8, wherein the CTBs include one or more CTBs allocated for non-interfering data streams from one or more other stations in the wireless network.

16. The method of claim 12, wherein the coordinator determines available time slots that the receiver can receive data communication without interference based on the local channel occupation report.

17. The method of claim 14, wherein the local channel occupation report is used by the coordinator for scheduling transmission for spatial reuse by multiple stations on a same frequency channel during a same allocated channel time slot.

18. A method of providing a spatial reuse in a wireless network for communicating compressed or uncompressed audio/video, the method comprising:

receiving a bandwidth reservation request from a transmitter for data communication with a receiver;

determining that the receiver is available for data communication;

transmitting a first response indicating availability of the receiver to the transmitter;

receiving local channel time occupation reports formed by each of the receiver and the transmitter, the local channel time occupation reports comprising data indicative of one or more time periods during which one or more stations other than the transmitter and the receiver in the wireless network are scheduled to transmit data messages that can interfere with data communication by the transmitter and the receiver;

allocating a bandwidth for the data communication between the transmit and receivers a coordinator based at least in part on the local channel time occupation reports; and

transmitting to the transmitter a second response comprising data indicative of one or more allocated channel time slots scheduled by the coordinator based on the local channel occupation reports to the transmitter, wherein multiple non-interfering stations transmit data simultaneously while sharing a same frequency band channel.

19. The method of claim 18, wherein at least one of the allocated channel time slots is also allocated for other non-interfering stations in the wireless network.

20. The method of claim 18, wherein the first response comprises data indicative of a time period reserved for antenna training.

21. The method of claim 18, wherein allocating the bandwidth comprises determining one or more available channel time slots based at least in part on the local channel occupation report.

22. The method of claim 18, wherein the local channel time occupation report comprising data indicative of one or more time periods during which one or more other stations in the wireless network are scheduled to transmit data messages that may interfere with transmissions by the transmitter and receptions by the receiver.

23. A method of providing a spatial reuse in a wireless network for communicating compressed or uncompressed audio/video, the method comprising:

receiving a probe inquiring availability for data communication with a transmitter;

transmitting a probe response indicating availability;

listening to a channel for channel busy indication (CBI) messages transmitted by one or more other stations in the wireless network;

forming a local channel occupation report by the transmitter, wherein the local channel occupation report comprising data indicative of one or more time periods during which one or more stations other than the transmitter in the wireless network are scheduled to transmit to the coordinator that can interfere with data communication by the transmitter;

transmitting the local channel occupation report to a coordinator from the transmitter; and

waiting for transmission of audio and/or video (A/V) data from the transmitter during one or more allocated channel time slots scheduled by the coordinator based on the local channel occupation report, wherein multiple non-interfering stations transmit A/V data simultaneously while sharing a same frequency band channel during the one or more allocated channel time slots.

24. The method of claim 23, further comprising performing antenna training with the transmitter at a reserved time period.

25. The method of claim 23, further comprising periodically transmitting CTS messages.

26. A system for providing spatial reuse in a wireless network for communicating uncompressed video, the system comprising:

a processor configured to;

transmit a bandwidth reservation request for data communication with a receiver to a coordinator,

receive a first response indicating availability of the receiver for the data communication,

listen to a channel for channel busy indication (CBI) messages transmitted by other stations in the wireless network,

forming a local channel occupation report by the receiver, wherein the local channel occupation report comprising data indicative of one or more time periods during which one or more stations other than the receiver in the wireless network are scheduled to transmit interfering data messages to the coordinator that can interfere with data communication by the receiver,

transmit the local channel occupation report to the coordinator, and

receive a second response comprising data indicative of one or more allocated channel time slots scheduled by the coordinator based on the local channel occupation report; and

an antenna or an antenna array in data communication with the processor that transmits audio and/or video (A/V) data during the one or more allocated channel time slots, wherein multiple non-interfering stations transmit A/V data simultaneously during the one or more allocated time slots while sharing a same frequency band channel.

27. The system of claim 26, wherein the antenna or the antenna array includes a directional antenna, wherein the processor is further configured to train the directional antenna.

28. A system for providing a spatial reuse in a wireless network for communicating compressed or uncompressed audio/video, the system comprising:

a processor configured to;

receive a bandwidth reservation request from a transmitter for data communication with a receiver,

determine that the receiver is available for data communication, transmit a first response indicating availability of the receiver to the transmitter,

form local channel occupation reports by the receiver and the transmitter based on channel busy indication (CBI) messages transmitted by other stations in the wireless network, wherein the local channel occupation reports comprising data indicative of one or more time periods during which one or more stations in the wireless network other than the receiver and the transmitter are scheduled to transmit data messages to the coordinator that can interfere with data communication by the receiver;

receive the local channel time occupation reports from at least one of the transmitter and receiver by a coordinator, and

allocate bandwidth for the data communication between the transmitter and the receiver based at least in part on the local channel time occupation reports, and transmit a second response comprising data indicative of the allocated bandwidth to the transmitter, wherein the allocated bandwidth is scheduled by the coordinator based on the local channel occupation report; and

an antenna or an antenna array in data communication with the processor that communicates control data with the transmitter and the receiver, wherein multiple non-interfering stations transmit data simultaneously while sharing a same frequency band channel during the allocated bandwidth.

29. The system of claim 28, wherein the processor is further configured to perform bandwidth reservations for all stations in the wireless network.

30. A system for providing a spatial reuse in a wireless network for communicating compressed or uncompressed video, the system comprising:

a processor configured to;

receive a probe inquiring availability for data communication with a transmitter,

transmit a probe response indicating availability, listen to a channel for channel busy indication (CBI) messages transmitted by other stations in the wireless network,

form a local channel occupation report by the transmitter, wherein the local channel occupation report comprising data indicative of one or more time periods during which one or more stations other than the transmitter in the wireless network are scheduled to transmit data messages to the coordinator that can interfere with data communication by the transmitter,

transmit the local channel occupation report to a coordinator from the transmitter, and

wait for transmission of audio and/or video (A/V) data from the transmitter; and

an antenna or an antenna array in data communication with the processor that receives audio and/or video (A/V) data from the transmitter, wherein multiple non-interfering stations transmit A/V data simultaneously while sharing a same frequency band channel during one or more allocated time slots scheduled by the coordinator based on the local channel occupation report.

31. A non-transitory computer-usable medium in a system for wireless communication of compressed or uncompressed audio/video having computer readable code comprising instructions for:

transmitting a bandwidth reservation request from a physical (PHY) layer for data communication with a receiver to a coordinator;

receiving a first response indicating availability of the receiver for the data communication;

listening to a local channel for channel busy indication (CBI) messages transmitted by other stations in the wireless network;

forming a local channel occupation report by the receiver, wherein the local channel occupation report comprising data indicative of one or more time periods during which one or more stations other than the receiver in the wireless network are scheduled to transmit data messages to the coordinator that can interfere with data communication by the receiver;

transmitting the local channel occupation report to the coordinator from the receiver;

receiving a second response comprising data indicative of one or more allocated channel time slots scheduled by the coordinator based on the local channel occupation report; and

transmitting audio and/or video (A/V) data to the receiver during the one or more allocated channel time slots, wherein multiple non-interfering stations transmit A/V data simultaneously while sharing a same frequency band channel during the one or more allocated channel time slots.