Signaling in a wireless network with sequential coordinated channel access

• US 20060034219A1
• Filed: 08/11/2004
• Published: 02/16/2006
• Est. Priority Date: 08/11/2004
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Research Laboratories, Inc. (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Electric Research Laboratories, Inc. (Mitsubishi Electric Corporation)
• Inventors: Zhang, Jinyun, Tao, Zhifeng, Gu, Daqing
• Granted Patent: US 7,328,026 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 47/15 in relation to multipoint traffic arrangements for broadcast or multicast in data networks H04L12/18
• CPC Class Codes: H04L 47/70 Admission control; Resource allocation
• CPC Class Codes: H04L 47/72 using reservation actions during connection setup
• CPC Class Codes: H04L 47/765 triggered by the end-points
• CPC Class Codes: H04L 47/788 Autonomous allocation of resources
• CPC Class Codes: H04L 47/824 Applicable to portable or mobile terminals
• CPC Class Codes: H04W 28/20 Negotiating bandwidth
• CPC Class Codes: H04W 74/04 Scheduled access hybrid access H04W74/02
• CPC Class Codes: H04W 74/0808 using carrier sensing, e.g. carrier sense multiple access [CSMA]
• CPC Class Codes: H04W 74/0866 using a dedicated channel for access
• CPC Class Codes: H04W 8/04 Registration at HLR or HSS [Home Subscriber Server]

Abstract

A method signals data in a channel of a network including multiple stations and an access point connected by a wireless channel. A station first requests access to the channel using a sequential coordinated channel access method of an access point. After the station receives permission to access the channel during a contention free period at a time corresponding to a sequence index value received by the station from the access point, the station transmits a resource request message to the access point to obtain a bandwidth allocation. In response, the station receives the bandwidth allocation, and the station can then transmit data during the contention free period according to the bandwidth allocation.

Claims

1. A method for signaling in a channel of a network including a plurality of stations and an access point connected by a wireless channel, comprising:

requesting, by a station, access to a channel using a sequential coordinated channel access method of an access point;

receiving, in the station, permission to access the channel during a contention free period at a time corresponding to a sequence index value received by the station from the access point;

transmitting, by the station, a resource request message to the access point to obtain a bandwidth allocation from the access point;

receiving from the access point a resource allocation message including the bandwidth allocation; and

transmitting data during the contention free period according to the bandwidth allocation.

2. The method of claim 1, further comprising:

transmitting a resource renegotiation message to the access point to modify the bandwidth allocation;

receiving from the access point a new resource allocation message including a modified bandwidth allocation; and

transmitting data during the contention free period according to the modified bandwidth allocation.

3. The method of claim 2, in which a format of the renegotiation message is identical to the resource request message.

4. The method of claim 2, in which the renegotiation message is transmitted during the contention free period.

5. The method of claim 2, in which the renegotiation message is transmitted during a contention period.

6. The method of claim 1, further comprising:

transmitting a resource relinquishment message to the access point to terminate the bandwidth allocation.

7. The method of claim 6, in which the resource relinquishment message is transmitted during a contention free period.

8. The method of claim 6, in which the resource relinquishment message is transmitted during a contention period.

9. The method of claim 1, in which the resource request message is for data to be transmitted as a single traffic stream.

10. The method of claim 1, in which the resource request message is for data to be transmitted as a plurality of traffic-streams.

11. The method of claim 1, in which the resource allocation message includes a transmission duration period indicating a length of time that the station can transmit during the contention free period.

12. The method of claim 1, in which the bandwidth allocation is for data of a single traffic stream.

13. The method of claim 1, in which the bandwidth allocation is for data of a plurality of traffic streams.

14. The method of claim 1, in which a traffic specification in the resource request message includes a minimum data rate, a mean data rate, and a peak data rate for the data.

15. The method of claim 1, in which a traffic specification in the resource request message includes a direction of transmitting the data.

16. The method of claim 1, in which the bandwidth allocation in the resource allocation message includes sequence index value.

17. The method of claim 6, in which the resource relinquishment is for data transmitted as a single data stream.

18. The method of claim 7, in which the resource relinquishment is for data transmitted as a plurality of traffic streams.