User equipment, base station, and cell discovery method

Patent metadata

Field	Value
Publication number	US-2016337952-A1
Application number	US-201615219481-A
Country	US
Kind code	A1
Filing date	Jul 26, 2016
Priority date	Jan 26, 2014
Publication date	Nov 17, 2016
Grant date	—

Abstract

Embodiments of the present invention disclose use equipment (UE), a base station, and a cell discovery method. The method includes: receiving, by the UE, auxiliary information, where the auxiliary information includes resource information of a second reference signal of a first neighboring cell; detecting, by the UE, a first reference signal of the first neighboring cell according to the auxiliary information to make the UE synchronize with the first neighboring cell; and detecting, by the UE according to the auxiliary information, the first reference signal of the first neighboring cell, or the second reference signal of the first neighboring cell, or the first reference signal and the second reference signal that are of the first neighboring cell, to acquire a cell identity ID or a virtual ID of the first neighboring cell.

First claim

What is claimed is:

1 . User equipment (UE), comprising:
a receiver, configured to receive auxiliary information, wherein the auxiliary information comprises resource information of a second reference signal of the first neighboring cell, and the first neighboring cell is any neighboring cell of a serving base station of the UE; a processor, comprising:
synchronization unit, configured to detect a first reference signal of the first neighboring cell according to the auxiliary information received by the receiver, to make the UE synchronize with the first neighboring cell; and
an acquisition unit, configured to: according to the auxiliary information received by the receiver, detect the first reference signal of the first neighboring cell, or detect the second reference signal of the first neighboring cell, or detect the first reference signal and the second reference signal that are of the first neighboring cell, to acquire a cell identity ID or a virtual ID of the first neighboring cell.

2 . The user equipment according to claim 1 , wherein the second reference signal of the first neighboring cell is a non-zero power channel state indication reference signal NZP-CSI-RS of the first neighboring cell or a quasi NZP-CSI-RS of the first neighboring cell, wherein
a scrambling code ID for generating the quasi NZP-CSI-RS is different from a scrambling code ID for generating the NZP-CSI-RS.

3 . The user equipment according to claim 1 , wherein the resource information of the second reference signal of the first neighboring cell comprises at least one of the following information:
a resource configuration for the second reference signal of the first neighboring cell, a quantity of antenna ports for the second reference signal of the first neighboring cell, or subframe information of the second reference signal of the first neighboring cell.

4 . The user equipment according to claim 1 , wherein the first reference signal of the first neighboring cell is a primary synchronization signal (PSS) of the first neighboring cell or a quasi PSS of the first neighboring cell, wherein
a root sequence number for generating the quasi PSS is different from a root sequence number for generating the PSS.

5 . The user equipment according to claim 1 , wherein
the first reference signal and the second reference signal are quasi co-sited.

6 . The user equipment according to claim 1 , wherein the synchronization unit is configured to:
detect and acquire a first reference signal sequence of the first neighboring cell according to the auxiliary information; and perform a correlation operation between the detected first reference signal sequence of the first neighboring cell and each local protocol-specified first reference signal sequence to acquire multiple correlation values, wherein the UE is synchronized with the first neighboring cell if there exists a first correlation value greater than a preset threshold, wherein the first correlation value is any one of the multiple correlation values acquired by the performing a correlation operation between the detected first reference signal sequence of the first neighboring cell and each local protocol-specified first reference signal sequence.

7 . The user equipment according to claim 1 , wherein the acquisition unit is configured to:
acquire an actual sending resource location of the first reference signal of the first neighboring cell according to the resource information of the second reference signal of the first neighboring cell; detect and acquire, at the actual sending resource location of the first reference signal of the first neighboring cell, the first reference signal of the first neighboring cell to acquire a first reference signal ID of the first neighboring cell; and acquire the virtual ID of the first neighboring cell according to the first reference signal ID of the first neighboring cell, or acquire the cell ID of the first neighboring cell according to a correspondence between the first reference signal ID of the first neighboring cell and the cell ID of the first neighboring cell; or acquire an actual sending resource location of the second reference signal of the first neighboring cell according to the resource information of the second reference signal of the first neighboring cell; detect and acquire, at the actual sending resource location of the second reference signal of the first neighboring cell, the second reference signal of the first neighboring cell to acquire a second reference signal scrambling code ID of the first neighboring cell; and acquire the virtual ID of the first neighboring cell according to the second reference signal scrambling code ID of the first neighboring cell, or acquire the cell ID of the first neighboring cell according to a correspondence between the second reference signal scrambling code ID of the first neighboring cell and the cell ID of the first neighboring cell; or acquire actual sending resource locations of the first reference signal and the second reference signal that are of the first neighboring cell according to the resource information of the second reference signal of the first neighboring cell; detect and acquire, at the actual sending resource location of the first reference signal of the first neighboring cell, the first reference signal of the first neighboring cell to acquire a first reference signal ID of the first neighboring cell; detect and acquire, at the actual sending resource location of the second reference signal of the first neighboring cell, the second reference signal of the first neighboring cell to acquire a second reference signal scrambling code ID of the first neighboring cell; and acquire the cell ID of the first neighboring cell according to a correspondence among the second reference signal scrambling code ID of the first neighboring cell, the first reference signal ID of the first neighboring cell, and the cell ID.

8 . A base station, wherein the base station is a serving base station of user equipment (UE), and the base station comprises:
a processor, comprising
an acquisition unit, configured to acquire a sending parameter of a first reference signal of a first neighboring cell and a sending parameter of a second reference signal of the first neighboring cell;
a generation unit, configured to generate auxiliary information according to the sending parameter of the first reference signal of the first neighboring cell and the sending parameter of the second reference signal of the first neighboring cell that are acquired by the acquisition unit, wherein the auxiliary information comprises resource information of the second reference signal of the first neighboring cell; and
a transmitter, configured to send the auxiliary information generated by the generation unit to user equipment UE in a cell to make the UE perform cell discovery.

9 . The base station according to claim 8 , wherein the second reference signal of the first neighboring cell is a non-zero power channel state indication reference signal NZP-CSI-RS of the first neighboring cell or a quasi NZP-CSI-RS of the first neighboring cell, wherein
a scrambling code ID for generating the quasi NZP-CSI-RS is different from a scrambling code ID for generating the NZP-CSI-RS.

10 . The base station according to claim 8 , wherein the first reference signal of the first neighboring cell is a primary synchronization signal (PSS) or a quasi PSS of the first neighboring cell, wherein
a root sequence number for generating the quasi PSS is different from a root sequence number for generating the PSS.

11 . The base station according to claim 8 , wherein the resource information of the se

Assignees

• Huawei Tech Co Ltd

Inventors

• Li Qiang
• Liu Jinnan
• Sun Jingyuan
• Guan Lei
• Mazzarese David Jean-Marie

Classifications

• H04W88/02

  Terminal devices · CPC title

• H04W56/0015

  one node acting as a reference for the others · CPC title

• H04W48/16 Primary

  Discovering, processing access restriction or access information · CPC title

• H04W72/0466

  the resource being a scrambling code · CPC title