Handover method and system in relay network, relay node, control base station and base station
Embodiments of the present invention provide a handover method and system in a relay network, a relay node, a control base station and a base station. The method includes: receiving, by a relay node, a first area identifier that identifies the relay node; sending a system information broadcast message carrying the first area identifier to a terminal in a coverage area; receiving a handover request message forwarded by a control base station; and performing, according to the handover request message, a control operation of accessing the relay node on the terminal. The first area identifier that identifies the relay node is allocated to the relay node, so that the terminal in the relay network can be normally handed over from the base station to the relay node.
1. A handover method in a relay network, comprising:
sending, by a control base station, a response message to a relay node according to a received interface setup request message, wherein the response message carries a first area identifier allocated to the relay node when an interface is setup to connect the relay node; and
receiving a handover request message sent by a mobility management entity, and forwarding the handover request message to the relay node by identifying the relay node from the first area identifier obtained from the response message, so that the relay node performs, according to the handover request message, a control operation enabling access to the relay node from a terminal, and
wherein the first area identifier enables the mobility management entity to send the handover request message to the control base station.
2. The handover method in the relay network according to claim 1 , wherein the allocated first area identifier is a first evolved universal terrestrial radio access network cell global identifier ECGI carried in the response message, and the first ECGI comprises an identifier of the control base station.
3. The handover method in the relay network according to claim 1 , wherein the allocated first area identifier is a first tracking area identity carried in the response message, and the first tracking area identity is corresponding to an identifier of the control base station.
4. The handover method in the relay network according to claim 3 , further comprising:
sending a base station configuration update message to the mobility management entity, wherein the base station configuration update message carries the first tracking area identity.
5. The handover method in the relay network according to claim 1 , wherein a portion of the first area identifier represent an identifier of the control base station, and the hand over request message is sent in accordance with the identifier of the control base station.
6. A control base station, comprising:
a transceiver configured to:
send a response message to a relay node according to a received interface setup request message, wherein the response message carries a first area identifier allocated to the relay node; and
receive a handover request message sent by a mobility management entity, the handover request message carrying the first area identifier and the first area identifier enabling the mobility management entity to send the handover request message to the control base station, and
a processor coupled to the transceiver, configured to identify the relay node from the first area identifier obtained from the response message, and
wherein the transceiver is configured to forward the handover request message to the relay node identified by the processor.
7. The control base station according to claim 6 , wherein, the transceiver is configured to send a base station configuration update message to the mobility management entity; the base station configuration update message carries the first area identifier; the first area identifier is a first tracking area identity carried in the response message; and the first tracking area identity is corresponding to an identifier of the control base station uniquely.
8. A handover method in a relay network, comprising:
allocating, by a control base station, a first area identifier to a relay node when an interface is setup to connect the relay node;
forwarding a handover request message to the relay node by identifying the relay node using the first area identifier, the relay node performing a control operation enabling access to the relay node from a terminal according to the handover request message, and
wherein the handover request message is sent to the control base station that is identified by a mobility management entity using the first area identifier.
9. The handover method in the relay network according to claim 8 , wherein system information broadcast message carrying the first area identifier is sent to terminals in a coverage area.