Method for establishing backhaul link, base station, relay node, and system

Patent metadata

Field	Value
Publication number	US-10034221-B2
Application number	US-201615067753-A
Country	US
Kind code	B2
Filing date	Mar 11, 2016
Priority date	Sep 13, 2013
Publication date	Jul 24, 2018
Grant date	Jul 24, 2018

Abstract

Embodiments of the present invention provide a method for establishing a backhaul link, a base station, a relay node and a system, and relate to the field of wireless communications, where the method includes: establishing a connection between a first user equipment part and a first base station; instructing a relay node and a second base station to establish a connection between a second user equipment part and the second base station, where the second base station switches a connection between the second user equipment part and the second base station over to a backhaul link; and switching the connection between the first base station and the first user equipment part over to a backhaul link.

First claim

What is claimed is:

1. A method for establishing a backhaul link for use with a first base station, the method comprising:
performing, by the first base station, interaction with a relay node to establish at least one connection between the first base station and the relay node, wherein the relay node comprises a first user equipment part and a second user equipment part, and the at least one connection comprises a first radio resource control (RRC) connection between the first base station and the first user equipment part;
sending, by the first base station, a first connection establishment indication to the relay node by using the at least one connection between the first base station and the relay node, and sending a second connection establishment indication to a second base station by using an original connection between the first base station and the second base station, the first connection establishment indication for instructing the relay node to perform interaction with the second base station for establishing a second RRC connection between the second user equipment part and the second base station and for switching the second RRC connection between the second user equipment part and the second base station over to a backhaul link; and
switching, by the first base station, the first RRC connection between the first base station and the first user equipment part over to a backhaul link;
wherein performing interaction with a relay node to establish at least one connection between the first base station and the relay node comprises:
performing first connection establishment interaction with the relay node to establish a first connection, wherein the first connection is the first RRC connection between the first base station and the first user equipment part; or
performing second connection establishment interaction with the relay node to establish a second connection and a third connection, wherein the second connection is the first RRC connection between the first base station and the first user equipment part, and the third connection is a third RRC connection between the first base station and the second user equipment part;
wherein, after performing first connection establishment interaction with the relay node to establish a first connection, the method further comprises:
receiving, by using the first connection, an indication message sent by the relay node, and
generating the first connection establishment indication and the second connection establishment indication according to the indication message; and

sending a first connection establishment indication to the relay node by using the at least one connection between the first base station and the relay node comprises:
sending the first connection establishment indication to the relay node by using the first connection; and

wherein before generating the first connection establishment indication and the second connection establishment indication according to the indication message, the method further comprises:
receiving, by using the first connection, a type identifier sent by the relay node for indicating a type of the relay node;
detecting according to the type identifier whether the type of the relay node conforms to a predetermined type; and
when a detection result is that the type of the relay node conforms to the predetermined type, performing generating the first connection establishment indication and the second connection establishment indication according to the indication message.

2. The method according to claim 1 , wherein:
after performing second connection establishment interaction with the relay node to establish a second connection and a third connection, the method further comprises:
receiving, by using the second connection or the third connection, an indication message sent by the relay node, and
generating the first connection establishment indication and the second connection establishment indication according to the indication message; and

sending a first connection establishment indication to the relay node by using the at least one connection between the first base station and the relay node comprises:
sending the first connection establishment indication to the relay node by using the second connection or the third connection.

3. The method according to claim 2 , wherein before generating the first connection establishment indication and the second connection establishment indication according to the indication message, the method further comprises:
receiving, by using the second connection, a first identifier sent by the relay node for representing a relay node at which the first user equipment part is located;
receiving, by using the third connection, a second identifier sent by the relay node for representing a relay node at which the second user equipment part is located;
detecting whether the first identifier matches the second identifier; and
when a detection result is that the first identifier matches the second identifier, performing generating the first connection establishment indication and the second connection establishment indication according to the indication message.

4. The method according to claim 1 , wherein:
the indication message comprises an identifier of the second user equipment part, or the indication message comprises an identifier of the first user equipment part and an identifier of the second user equipment part;
the first base station stores an identifier of the second base station;
sending a first connection establishment indication to the relay node by using the at least one connection between the first base station and the relay node comprises:
sending the first connection establishment indication comprising the identifier of the second user equipment part and the identifier of the second base station to the relay node by using the at least one connection between the first base station and the relay node, wherein the relay node performs interaction with the second base station according to the identifier of the second user equipment part and the identifier of the second base station to establish the connection between the second user equipment part and the second base station; and

sending a second connection establishment indication to a second base station by using an original connection between the first base station and the second base station comprises:
sending the second connection establishment indication comprising the identifier of the second user equipment part to the second base station by using the original connection between the first base station and the second base station, wherein the second base station performs interaction with the relay node according to the identifier of the second user equipment part to establish the connection between the second user equipment part and the second base station.

5. The method according to claim 4 , further comprising:
receiving, by using the original connection between the first base station and the second base station, an access channel resource sent by the second base station; and
sending the access channel resource to the relay node by using the at least one connection between the first base station and the relay node, wherein the relay node performs interaction with the second base station according to the access channel resource to establish the connection between the second user equipment part and the second base station, wherein the access channel resource comprises an access channel preamble code preamble code.

6. The method according to claim 4 , further comprising:
sending configuration information to the second base station by using the original connection between the first base station and the second base station for configuring the connection between the second use

Assignees

• Huawei Tech Co Ltd

Inventors

• Cao Zhenzhen
• Xiong Xin
• Li Mingchao

Classifications

• H04W84/047

  using dedicated repeater stations · CPC title

• H04W76/10 Primary

  Connection setup · CPC title

• H04W88/04

  adapted for relaying to or from another terminal or user · CPC title

• H04W76/20

  Manipulation of established connections · CPC title

• H04W40/22 Primary

  using selective relaying for reaching a BTS [Base Transceiver Station] or an access point · CPC title