Coding methods of communicating identifiers in peer discovery in a peer-to-peer network

• US 8,630,281 B2
• Filed: 07/10/2007
• Issued: 01/14/2014
• Est. Priority Date: 07/10/2007
• Status: Expired due to Fees

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Li, Junyi, Laroia, Rajiv, Tavildar, Saurabh, Richardson, Thomas, Wu, Xinzhou, Grokop, Leonard
• Primary Examiner(s): HTUN, SAN A
• Application Number:
  US11/775,793
• Publication Number:
  US 20090016249A1
• Time in Patent Office: 2,380 Days
• Field of Search: 370/304, 370/324, 370/310.2, 370/328, 370/327, 370350-356, 370/315, 370/316, 370/338, 370503-520, 455/502, 455/41.2, 455/518, 455/519, 455/11.1, 455/13.2, 455/13.1, 375/272, 375354-357, 375/359, 375363-368
• US Class Current: 370/350
• 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: H04L 12/18 for broadcast or conference , e.g. multicast
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0032 Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 67/1061 using node-based peer discovery mechanisms static access to replicated servers H04L67/1006; service discovery H04L67/51
• CPC Class Codes: H04L 67/1093 Some peer nodes performing special functions
• CPC Class Codes: H04W 56/001 Synchronization between nodes
• CPC Class Codes: H04W 56/0015 one node acting as a reference for the others
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

Systems and methodologies are described that facilitate identifying peers based upon encoded signals during peer discovery in a peer to peer network. For example, direct signaling that partitions a time-frequency resource into a number of segments can be utilized to communicate an identifier within a peer discovery interval; thus, a particular segment selected for transmission can signal a portion of the identifier, while a remainder can be signaled based upon tones communicated within the selected segment. Moreover, a subset of symbols within the resource can be reserved (e.g., unused) to enable identifying and/or correcting timing offset. Further, signaling can be effectuated over a plurality of peer discovery intervals such that partial identifiers communicated during each of the peer discovery intervals can be linked (e.g., based upon overlapping bits and/or bloom filter information).

Claims

1. A method that facilitates incorporating reserved symbols within a peer discovery interval, comprising:

synchronizing timing within a peer to peer network;

transmitting at least a portion of an identifier during a peer discovery interval as specified by the timing; and

reserving at least one symbol within the peer discovery interval to enable identifying and recovering from timing offset,

wherein the identifier is transmitted via direct signaling within a selected one of the plurality of segments using respective tones upon seven symbols in the selected segment as a function of the identifier and reserving an eighth symbol in the selected segment.

2. A wireless communications apparatus that enables incorporating reserved symbols within a peer discovery interval, comprising:

means for synchronizing timing within a peer to peer network;

means for transmitting at least a portion of an identifier during a peer discovery interval as specified by the timing; and

means for reserving at least one symbol within the peer discovery interval to enable identifying and recovering from timing offset,

wherein the identifier is transmitted via direct signaling within a selected one of the plurality of segments using respective tones upon seven symbols in the selected segment as a function of the identifier and reserving an eighth symbol in the selected segment.

3. A non-transitory machine-readable medium having stored thereon machine-executable instructions for:

synchronizing timing within a peer to peer network;

transmitting at least a portion of an identifier during a peer discovery interval as specified by the timing; and

reserving at least one symbol within the peer discovery interval to enable identifying and recovering from timing offset,

wherein the identifier is transmitted via direct signaling within a selected one of the plurality of segments using respective tones upon seven symbols in the selected segment as a function of the identifier and reserving an eighth symbol in the selected segment.