Identifying a serving cell

• US 9,781,693 B2
• Filed: 02/28/2017
• Issued: 10/03/2017
• Est. Priority Date: 11/03/2014
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Ji, Tingfang, Horn, Gavin Bernard, Smee, John Edward, Soriaga, Joseph Binamira, Bhushan, Naga, Jiang, Jing, Azarian Yazdi, Kambiz, Ang, Peter Pui Lok, Gaal, Peter, Mukkavilli, Krishna Kiran, Gorokhov, Alexei Yurievitch
• Primary Examiner(s): GHOWRWAL, OMAR J
• Application Number:
  US15/445,616
• Publication Number:
  US 20170171830A1
• Time in Patent Office: 217 Days
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0058 Allocation criteria
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 48/14 using user query or user detection
• CPC Class Codes: H04W 56/00 Synchronisation arrangements
• CPC Class Codes: H04W 56/0015 one node acting as a reference for the others
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 76/20 Manipulation of established connections
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals

Abstract

Methods, systems, and devices are described for wireless communication. In one method, a method of wireless communication at a user equipment (UE) includes receiving a synchronization signal. The synchronization signal may be common to a plurality of cells within a network. The method further includes acquiring a timing of the network based on the synchronization signal, and transmitting a pilot signal in response to acquiring the timing of the network. The pilot signal may identify the UE and be concurrently receivable by the plurality of cells within the network. Other aspects, features, and embodiments are also claimed and described.

Claims

1. A method of wireless communication at a central node, comprising:

receiving, from a plurality of base stations, information corresponding to a number of pilot signals transmitted by a number of UEs;

identifying, based at least in part on the information, a serving cell for at least one of the UEs; and

transmitting to at least one of the base stations an indication of a set of one or more UEs for which the at least one of the base stations is identified as a serving cell.

2. The method of claim 1, wherein the information corresponding to the number of pilot signals comprises measurements of the number of pilot signals.

3. The method of claim 1, wherein identifying the serving cell for the at least one of the UEs comprises:

identifying the serving cell as a handover target for the at least one of the UEs.

4. A device for wireless communication at a central node, comprising a processor, memory in electronic communication with the processor, and instructions stored in the memory, the instructions being executable by the processor to:

receive, from a plurality of base stations, information corresponding to a number of pilot signals transmitted by a number of UEs;

identify, based at least in part on the information, a serving cell for at least one of the UEs; and

transmit to at least one of the base stations an indication of a set of one or more UEs for which the at least one of the base stations is identified as a serving cell.

5. The device of claim 4, wherein the information corresponding to the number of pilot signals comprises measurements of the number of pilot signals.

6. The device of claim 4, wherein the instructions executable by the processor to identify the serving cell for the at least one of the UEs comprise instructions executable by the processor to identify the serving cell as a handover target for the at least one of the UEs.

7. A device for wireless communication at a central node, comprising:

means for receiving, from a plurality of base stations, information corresponding to a number of pilot signals transmitted by a number of UEs;

processor for identifying, based at least in part on the information, a serving cell for at least one of the UEs; and

means for transmitting to at least one of the base stations an indication of a set of one or more UEs for which the at least one of the base stations is identified as a serving cell.

8. The device of claim 7, wherein the information corresponding to the number of pilot signals comprises measurements of the number of pilot signals.

9. The device of claim 8, wherein the processor for identifying the serving cell for the at least one of the UEs is configured to:

identify the serving cell as a handover target for the at least one of the UEs.

10. A non-transitory computer-readable medium storing computer-executable code for wireless communication at a central node, the code executable by a processor to:

receive, from a plurality of base stations, information corresponding to a number of pilot signals transmitted by a number of UEs;

identify, based at least in part on the information, a serving cell for at least one of the UEs; and

transmit to at least one of the base stations an indication of a set of one or more UEs for which the at least one of the base stations is identified as a serving cell.

11. The non-transitory computer-readable medium of claim 10, wherein the information corresponding to the number of pilot signals comprises measurements of the number of pilot signals.

12. The non-transitory computer-readable medium of claim 10, wherein the code executable by the processor to identify the serving cell for the at least one of the UEs comprise code executable by the processor to identify the serving cell as a handover target for the at least one of the UEs.