Synchronizing peer-to-peer operation for outside network coverage and partial network coverage using LTE air interface
First Claim
1. An apparatus to:
- select a portion of an uplink (UL) frame, used by a first User Equipment (UE), to establish a direct communication (D2D) between the first UE and one or more second UEs;
generate timing information and synchronization source type information, wherein the timing information is used to synchronize the one or more second UEs with the first UE;
transmit a synchronization signal comprising the timing information, wherein the timing information is included in the portion of the UL frame used by the first UE, and wherein the first UE is to act as a reference source in a local synchronization area;
determine interference with a remote synchronization area that at least partially overlaps with the local synchronization area; and
in response to the interference, autonomously change transmission of the synchronization signal to a different subchannel, timeslot or subframe.
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Abstract
A user equipment (UE) enables synchronous peer-to-peer communication between devices for out of network coverage and partial network coverage scenarios. The UE performs a synchronization procedure and selects a spectrum resource within an uplink (UL) spectrum for device-to-device (D2D) communication. The UE, representing a synchronization source, generates timing information and synchronization signals for synchronizing a group of wireless communication devices (peer UEs) with the UE in a local synchronization area. The UE transmits, in selected or pre-allocated time or frequency resources, a synchronization signal including the timing information in order to synchronize devices in the local synchronization area.
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Citations
21 Claims
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1. An apparatus to:
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select a portion of an uplink (UL) frame, used by a first User Equipment (UE), to establish a direct communication (D2D) between the first UE and one or more second UEs; generate timing information and synchronization source type information, wherein the timing information is used to synchronize the one or more second UEs with the first UE; transmit a synchronization signal comprising the timing information, wherein the timing information is included in the portion of the UL frame used by the first UE, and wherein the first UE is to act as a reference source in a local synchronization area; determine interference with a remote synchronization area that at least partially overlaps with the local synchronization area; and in response to the interference, autonomously change transmission of the synchronization signal to a different subchannel, timeslot or subframe. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A User Equipment (UE) comprising processing circuitry, the processing circuitry to:
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select a portion of a Up Link (UL) frame, used by the UE, to establish a direct communication (D2D) between the UE and one or more other UEs; generate timing information and synchronization source type information, wherein the timing information is used to synchronize the one or more other UEs with the UE; transmit a synchronization signal comprising the timing information, wherein the timing information is included in the portion of the UL frame used by the UE, and wherein the UE is to act as a reference source in a local synchronization area; determine interference with a remote synchronization area that at least partially overlaps with the local synchronization area; and in response to the interference, autonomously change transmission of the synchronization signal to a different subchannel, timeslot or subframe. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A non-transitory computer readable storage medium that stores instructions for execution by one or more processors of a user equipment (UE), comprising:
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selecting a portion of a Up Link (UL) frame, used by the UE, to establish a direct communication (D2D) between the UE and one or more other UEs; generating timing information and synchronization source type information, wherein the timing information is used to synchronize the one or more other UEs with the UE; transmitting a synchronization signal comprising the timing information, wherein the timing information is included in the portion of the UL frame used by the UE, and wherein the UE is to act as a reference source in a local synchronization area; determining interference with a remote synchronization area that at least partially overlaps with the local synchronization area; and in response to the interference, autonomously changing transmission of the synchronization signal to a different subchannel, timeslot or subframe. - View Dependent Claims (20, 21)
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Specification