Beacon frame

• US 9,172,484 B2
• Filed: 05/19/2010
• Issued: 10/27/2015
• Est. Priority Date: 10/17/2005
• Status: Expired due to Fees

• Current Assignee: Creative Technology Ltd.
• Original Assignee: Creative Technology Ltd.
• Inventors: Leow, Siew Kiat, Lim, Song Gee, Tong, Vincent, Zeng, Zhaozhen
• Primary Examiner(s): Ton, Dang
• Assistant Examiner(s): Preval, Lionel
• Application Number:
  US12/783,486
• Publication Number:
  US 20100226300A1
• Time in Patent Office: 1,987 Days
• Field of Search: 370/389, 370/350, 370/322, 370/311, 370/349, 370/395.4, 370/338, 455/343, 455/509, 709/221, 725/89
• US Class Current: 1/1
• CPC Class Codes: H04J 3/0638 Clock or time synchronisation among nodes; Internode synchronisation synchronization for ring networks H04L12/422; data switching networks with synchronous transmission H04L12/43
• CPC Class Codes: H04W 56/00 Synchronisation arrangements

Abstract

A beacon frame (5) for transmission during a beacon period for a wireless device to maintain synchronization with other wireless devices of a community in a wireless communications network, the frame (5) comprising: a header (8) containing routing information for the frame (5); beacon parameters (9) to indicate signaling methods in use by the wireless devices; at least one information element (7) comprising at least one identifier to identify the wireless device; wherein the at least one identifier comprises a signature identifier (104) for the frame (5), an interface version, and a name and unique identifier for the device.

Claims

1. A method for saving power in a mobile device of a wireless ad hoc network community, the method comprising:

(a) providing a beacon frame for transmission by each member of a community of mobile devices during a beacon period, the beacon frame associable with a community time period, a community entry time indicator and a community clock, the community entry time indicator indicating when the member joined the community;

(b) detecting the existence of the community of mobile devices using the community time period;

(c) determining the member with the highest seniority among the community of mobile devices by comparing the community entry time indicator of the members;

(d) synchronizing with the community clock of the member with the highest seniority; and

(e) using the community time period to determine whether or not the community is in community gathering time,

if the community is not in community gathering time, deactivating a radio frequency transceiver of the mobile device, and

if the community is in community gathering time, activating the radio frequency transceiver of the mobile device.

2. The method according to claim 1, wherein after deactivating the radio frequency transceiver, a predetermined amount of time passes before re-checking whether a community of mobile devices is being created.

3. The method according to claim 1, wherein the community gathering time includes determining predetermined time intervals to join the community activities.

4. The method according to claim 1, wherein if the community is in community gathering time:

joining the community gathering for synchronization with other members in the community,

transmitting information related to the mobile device to other members in the community,

receiving information related to other members in the community, and

determining whether there are new members in the community,

wherein for each new member determined in the community, a list of available content that the new member will share with the members in the community is requested.

5. The method according to claim 1, wherein the community gathering time is for a predetermined period of time and that the radio frequency transceiver of the mobile device remains activated during this predetermined period of time.

6. The method according to claim 1, wherein if the community is in community gathering time:

joining the community gathering for synchronization with other members in the community, and at least one of;

transmitting information related to the mobile device to other members in the community; and

receiving information related to other members in the community,

wherein the information is associable with a shared object which enables local browsing to reduce power consumption while browsing.

7. The method according to claim 1 further comprising downloading a shared object, the shared object being part of a device database,

wherein the downloaded shared object enables local browsing to reduce power consumption while browsing when the community is not in community gathering time.