Simplified beaconing and channel reservation techniques for short range wireless networks

• US 9,402,269 B2
• Filed: 12/24/2008
• Issued: 07/26/2016
• Est. Priority Date: 12/27/2007
• Status: Active Grant

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips N.V.
• Inventors: Cavalcanti, Dave A. T.
• Primary Examiner(s): YEUNG, MANG HANG
• Application Number:
  US12/747,572
• Publication Number:
  US 20100272076A1
• Time in Patent Office: 2,771 Days
• Field of Search: 370/329, 370/336, 370/322, 455450-455, 455/464, 455/509
• US Class Current: 1/1
• CPC Class Codes: H04W 74/004 in the uplink, i.e. towards network
• CPC Class Codes: H04W 74/08 Non-scheduled access, e.g. ALOHA hybrid access H04W74/02
• CPC Class Codes: H04W 74/0875 with assigned priorities based access
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

A system and method for wireless BANs and short-range wireless networks that support heterogeneous devices and applications are disclosed. In one example embodiment, a method of implementing a MAC superframe structure for short-range wireless networks includes transmitting multiple beacon slots (102) during a beacon period (404) wherein the multiple beacon slots (102) include one or more simplified beacon slots associated with one or more simple devices (102), and transmitting payload data during a data transfer period (410) substantially following the beacon period (404) and wherein the data transfer period (410) includes one or more RCA periods (412) associated with the one or more simple devices (102) for transmitting and/or receiving the payload data associated with the one or more simple devices (102) upon receipt of the indication that the RCA period (412) is present in the one or more simplified beacon slots associated with the simple devices (102).

Claims

1. A non-transitory computer readable medium with instructions stored therein which upon execution instruct at least one processor to:

generate a MAC superframe format for a wireless network, the MAC superframe format including a reserved channel access (RCA) period that is allocated exclusively to one or more simple devices for transfer or receipt of payload data within a beaconing group, the MAC superframe further comprising a distributed reservation protocol (DRP) period and a prioritized contention access (PCA) protocol period that are accessible by devices different from the one or more simple devices for transfer or receipt of payload data;

generate a beacon period including multiple beacon slots, the multiple beacon slots including one or more simplified beacon slots, the one or more simplified beacon slots used by a selected device to transmit a beacon on behalf of the one or more simple devices such that the beacon enables discovery of the one or more simple devices the one or more simple devices comprising sensor devices; and

transfer or receive payload data by the one or more simple devices substantially following the beacon period using the RCA period.

2. The non-transitory computer readable medium of claim 1, wherein the beacon period further comprises one or more beacon slots associated with complex devices within the beaconing group, the complex devices each being configured to transmit beacons at a rate greater than or equal to one beacon per superframe.

3. The non-transitory computer readable medium of claim 2, wherein each RCA period is used for data transmission between devices selected from the group consisting of the simple devices and between the simple devices and the complex devices.

4. The non-transitory computer readable medium of claim 3, wherein the one or more simple devices receive payload data during the RCA period and the one or more complex devices receive payload data durinq the DRP period or the PCA protocol period, wherein processing the payload data by the one or more simple and complex devices include acts selected from the group consisting of buffering, decoding, and demodulating.

5. The non-transitory computer readable medium of claim 1, wherein the beacon period is associated with a current MAC superframe and is used to coordinate operations in a MAC superframe selected from the group consisting of current superframe, next superframe, and substantially next superframe.

6. A method of implementing a MAC superframe for wireless networks, wherein each of the wireless networks includes multiple transceivers that communicate via wireless links, and wherein the multiple transceivers include one or more simple devices, the method comprising:

transmitting multiple beacons during a beacon period including multiple beacon slots, the multiple beacon slots including one or more simplified beacon slots, the one or more simplified beacon slots used by a selected transceiver to transmit a beacon on behalf of the one or more simple devices such that the beacon enables discovery of the one or more simple devices within a beaconing group, the one or more simple devices comprising sensor devices; and

transmitting payload data during a data transfer period substantially following the beacon period and wherein the data transfer period includes one or more reserved channel access (RCA) periods within the MAC superframe allocated exclusively to the one or more simple devices for transmitting the payload data associated with the one or more simple devices upon receipt of an indication in the one or more simplified beacon slots associated with the simple devices that the one or more RCA periods are present, the MAC superframe further comprising a distributed reservation protocol (DRP) period and a prioritized contention access (PCA) protocol period that are accessible by devices different from the one or more simple devices for transfer or receipt of payload data.

7. The method of claim 6, wherein the multiple transceivers further comprise one or more complex devices which are each configured to transmit beacons at a rate greater than or equal to one beacon per superframe, and wherein the beacon period further includes one or more beacon slots associated with the one or more complex devices.

8. The method of claim 7, wherein transmitting the payload data during the data transfer period substantially following the beacon period comprises:

determining whether the beacon period includes the one or more simplified beacon slots, the one or more simplified beacon slots being one or more beacon slots used by the selected transceiver to transmit the simplified beacon indicating a presence of the one or more simple devices; and

if the beacon period includes the one or more simplified beacon slots, then transmitting the payload data during the data transfer period substantially following the beacon period and wherein the data transfer period includes one or more RCA periods associated with the one or more simple devices for transmitting the payload data associated with the one or more simple devices upon receipt of the indication that the RCA period is present.

9. The method of claim 7, wherein transmitting the simplified beacon frame within the simplified beacon slot by the selected transceiver comprises:

transmitting the one or more simplified beacon frames using a physical layer (PHY) associated with devices selected from the group consisting of the one or more simple devices and the one or more complex devices.

10. The method of claim 7, wherein each RCA period is used for data transmission between devices selected from the group consisting of the simple devices and between the simple devices and the complex devices.

11. The method of claim 6, wherein, in transmitting, the selected transceiver is a device selected from the group consisting of a simple device and a complex device.

12. An apparatus, comprising:

multiple transceivers that communicate via wireless links in a wireless network within a beaconing group and wherein the multiple transceivers include one or more simple devices, wherein each of the transceivers operates according a MAC superframe structure, wherein the MAC superframe structure comprises a beacon period including multiple beacon slots, wherein the multiple beacon slots include one or more simplified beacon slots, the one or more simplified beacon slots used by a selected transceiver to transmit a beacon on behalf of the one or more simple devices within the beaconing group, the simplified beacon enabling discovery of the one or more simple devices within the beaconing group, the one or more simple devices comprising sensor devices; and

wherein the MAC superframe structure further comprises a data transfer period substantially following the beacon period including one or more reserved channel access (RCA) periods allocated exclusively to the one or more simple devices, the MAC superframe structure further comprising a distributed reservation protocol (DRP) period and a prioritized contention access (PCA) protocol period that are accessible by devices different from the one or more simple devices for transfer or receipt of payload data.

13. The apparatus of claim 12, wherein the beacon period further comprises one or more beacon slots associated with complex devices within the beaconing group that are each configured to transmit beacons at a rate greater than or equal to one beacon per superframe.