Communication methods and apparatus

• US 8,494,437 B2
• Filed: 04/22/2009
• Issued: 07/23/2013
• Est. Priority Date: 04/22/2009
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Laroia, Rajiv, Li, Junyi, Park, Vincent D., Wang, Ying, Jovicic, Aleksandar
• Primary Examiner(s): Choe, Henry
• Application Number:
  US12/427,890
• Publication Number:
  US 20100272081A1
• Time in Patent Office: 1,553 Days
• Field of Search: 455/3.01, 455/3.03, 455/3.06, 455/418, 455/419, 455/509, 455/510
• US Class Current: 455/3.01
• CPC Class Codes: H04W 4/12 Messaging; Mailboxes; Announcements
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]

Abstract

Methods and apparatus well suited for efficiently communicating small amounts of information relatively frequently in a wireless communications system are described. An uplink timing frequency structure for an access point includes a set of dedicated uplink communications resources, e.g., expression advertisement interval air link resources. Different ones of the set of dedicated uplink communications resources correspond to different individual wireless communications devices currently registered with the access point. In the downlink timing frequency structure for the access point there are dedicated downlink broadcast communications resources, e.g., expression broadcast interval air link resources and neighbor expression broadcast interval air link resources. Information received on dedicated uplink air link resources is echoed back or selectively echoed back on the dedicated downlink air link resources. Wireless communications devices monitor downlink dedicated air link resources to recover expression information being communicated by other wireless communications devices in its local vicinity.

Claims

1. A method of operating an access point, the method comprising:

receiving a first set of information from a plurality of different wireless communications devices in dedicated uplink resources corresponding to individual wireless communications devices, information from an individual wireless communications device being received in a dedicated uplink resource corresponding to the individual wireless communications device, wherein said first set of information includes information transmitted by at least one wireless communications device operating in a sleep state with respect to the access point; and

transmitting a first portion of the received first set of information from the plurality of different wireless communications devices in dedicated downlink broadcast communications resources corresponding to the individual wireless communications devices.

2. The method of claim 1, wherein said first set of information also includes information transmitted by at least one wireless communications device operating in an active state with respect to the access point.

3. The method of claim 1, wherein said first set of information is received during an expression advertisement interval.

4. The method of claim 3, wherein transmitting the first portion of the received first set of information is performed during an expression broadcast interval.

5. The method of claim 3, wherein a dedicated uplink communications resource corresponding to an individual wireless communications device is a set of OFDM tone-symbols.

6. An access point comprising:

means for receiving a first set of information from a plurality of different wireless communications devices in dedicated uplink resources corresponding to individual wireless communications devices, information from an individual wireless communications device being received in a dedicated uplink resource corresponding to the individual wireless communications device, wherein said first set of information includes information transmitted by at least one wireless communications device operating in a sleep state with respect to the access point; and

means for transmitting a first portion of the received first set of information from the plurality of different wireless communications devices in dedicated downlink broadcast communications resources corresponding to the individual wireless communications devices.

7. The access point of claim 6, wherein said first set of information also includes information transmitted by at least one wireless communications device operating in an active state with respect to the access point.

8. The access point of claim 6, wherein said first set of information is received during an expression advertisement interval.

9. The access point of claim 8, wherein transmitting the first portion of the received first set of information is performed during an expression broadcast interval.

10. An access point comprising:

at least one processor configured to;

receive a first set of information from a plurality of different wireless communications devices in dedicated uplink resources corresponding to individual wireless communications devices, information from an individual wireless communications device being received in a dedicated uplink resource corresponding to the individual wireless communications device, wherein said first set of information includes information transmitted by at least one wireless communications device operating in a sleep state with respect to the access point; and

transmit a first portion of the received first set of information from the plurality of different wireless communications devices in dedicated downlink broadcast communications resources corresponding to the individual wireless communications devices;

and memory coupled to said at least one processor.

11. The access point of claim 10, wherein said first set of information also includes information transmitted by at least one wireless communications device operating in an active state with respect to the access point.