Systems, methods, and devices for device-to-device discovery

• US 9,504,088 B2
• Filed: 06/26/2014
• Issued: 11/22/2016
• Est. Priority Date: 09/26/2013
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel IP Corporation (Intel Corporation)
• Inventors: Xiong, Gang, Niu, Huaning, Chatterjee, Debdeep, Fwu, Jong-Kae
• Primary Examiner(s): Nguyen, Phuongchau Ba
• Application Number:
  US14/316,156
• Publication Number:
  US 20150085764A1
• Time in Patent Office: 880 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G06F 9/4856 resumption being on a different machine, e.g. task migration, virtual machine migration G06F9/5088 takes precedence
• CPC Class Codes: H04L 1/12 by using return channel
• CPC Class Codes: H04L 1/1607 Details of the supervisory signal
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 47/12 Avoiding congestion; Recovering from congestion
• CPC Class Codes: H04L 47/122 by diverting traffic away from congested entities
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 67/025 for remote control or remote monitoring of applications
• CPC Class Codes: H04L 67/104 Peer-to-peer [P2P] networks
• CPC Class Codes: H04W 24/04 Arrangements for maintaining operational condition
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 28/02 Traffic management, e.g. flow control or congestion control
• CPC Class Codes: H04W 36/03 Reselecting a link using a direct mode connection
• CPC Class Codes: H04W 36/32 by location or mobility data, e.g. speed data
• CPC Class Codes: H04W 40/22 using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
• CPC Class Codes: H04W 40/24 : Connectivity information management, e.g. connectivity discovery or connectivity update
• CPC Class Codes: H04W 48/16 : Discovering, processing access restriction or access information
• CPC Class Codes: H04W 52/0274 : by switching on or off the equipment or parts thereof
• CPC Class Codes: H04W 72/0446 : Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0453 : Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/23 : in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 76/14 : Direct-mode setup
• CPC Class Codes: H04W 76/18 : Management of setup rejection or failure
• CPC Class Codes: H04W 76/27 : Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 76/38 : triggered by timers
• CPC Class Codes: H04W 8/005 : Discovery of network devices, e.g. terminals
• CPC Class Codes: H04W 84/12 : WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 88/08 : Access point devices
• CPC Class Codes: H04W 92/20 : between access points
• CPC Class Codes: Y02D 10/00 : Energy efficient computing, e.g. low power processors, power management or thermal management
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

A user equipment (UE) includes a reference signal component, a guard period component, and a transmission component. The reference signal component is configured to randomly select a sequence for a reference signal for transmission in an open device-to-device discovery packet. The guard period component is configured to determine a first symbol signal for transmission during a first symbol of the device-to-device discovery packet. The first symbol comprises a partially punctured symbol. The transmission component is configured to transmit the device-to-device discovery packet. The device-to-device discovery packet includes the first symbol having the partially punctured symbol and a reference signal based on the randomly selected sequence.

Claims

1. User equipment (UE) comprising:

a radio configured to transmit and receive signals in a licensed wireless spectrum;

a receiver component configured to receive, with the radio in a reception mode, a downlink transmission from a radio access network;

a communication mode component configured to switch the UE from the reception mode to a transmission mode; and

a transmission component configured to transmit a device-to-device discovery packet during an orthogonal frequency division multiplexing (OFDM) resource block, wherein;

transmitting the device-to-device discovery packet comprises transmitting a first symbol of the OFDM resource block comprising a guard period; and

the guard period is a signal for the first symbol that does not include power in a first portion of the first symbol and has power or information during a second portion of the first symbol, wherein the first portion precedes the second portion.

2. The UE of claim 1, wherein transmitting the first symbol comprising the guard period comprises transmitting the first symbol with an unused portion of the first symbol and a used portion of the first symbol, wherein the unused portion precedes the used portion in time.

3. The UE of claim 2, wherein the unused portion of the first symbol comprises about 20 milliseconds or more.

4. The UE of claim 2, wherein the unused portion of the first symbol comprises about one-third of the first symbol.

5. The UE of claim 2, wherein the unused portion of the first symbol comprises about one-half of the first symbol.