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US 2014/0370904 A1Published application
Device-to-device discovery
AssigneeResearch In Motion Limited
InventorsJack Anthony Smith, Masoud Ebrahimi Tazeh Mahalleh, Robert Novak, Robert Mark Harrison, JoonBeom Kim
Life of this patent
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Abstract
A wireless access network node assigns different base sequences to respective user equipments (UEs) to use for discovery beacon signals for device-to-device (D2D) discovery.
Claims20
A method comprising:
- assigning, by a wireless access network node, different base sequences to respective user equipments (UEs) to use for discovery beacon signals for device-to-device (D2D) discovery, wherein the discovery beacon signals include one or more of a sounding reference signal and a reference signal of a Physical Uplink Control Channel (PUCCH).
A user equipment (UE) comprising:
- at least one processor configured to:
- receive, from a wireless access network node, an indication of a first base sequence to use for a discovery beacon signal to be transmitted or received by the UE for device-to-device (D2D) discovery, wherein the first base sequence is one of a plurality of base sequences assigned by the wireless access network node for use in D2D discovery,
- wherein the discovery beacon signal includes a sounding reference signal or a reference signal of a Physical Uplink Control Channel (PUCCH).
A wireless access network node comprising:
- at least one processor configured to:
- reserve one or more base sequences or preambles of a random access channel to use for discovery beacon signal transmissions from UEs served by the wireless access network node for device-to-device (D2D) discovery, the reserved one or more base sequences or preambles different from base sequences or preambles used for random access procedures;
- and
- send, to a first UE, information relating to a discovery beacon signal, the information indicating a timing advance value of a second UE, and information pertaining to one or more of a base sequence and preamble for the discovery beacon signal.
1 more element
Dependencies are inferred from the claim text.