Patent ID: 8442049
Filing Date: 2013-05-14
Classification: H04B,H04W

Abstract:
1. An attaching method for use in a base station (BS), the BS being adapted for use in a relay network system, the relay network system comprising the BS, a relay station (RS) and a core network (CN), the BS being connected with the CN via a backhaul link, the network system conforming to long term evolution (LTE) standard, the BS being a donor evolved Node B (eNB), the RS being a relay node (RN), a Relay E-UTRAN NodeB (ReNB) or a relay eNB and the CN being an Evolved Packet Core (EPC) which comprises a serving gateway (S-GW), a home subscribe server (HSS), an operation and maintenance (O&M) system, and a mobility management entity (MME), the attaching method comprising the following steps: (a) enabling the BS to setup a communication link procedure between the RS and the CN corresponding to a link request from the RS; (b1) enabling the BS to create a mapping table of mapping a GPRS tunneling protocol for user plane (GTP-U) connection and a tunnel endpoint identifier (TEID) for connecting the RS and the S-GW of the CN after step (a); (b2) enabling the BS to, after step (a), record an MME mapping identifier, an eNB mapping identifier and relation between an MME S1-AP identifier and an eNB S1-AP identifier in the mapping table, and connect the RS and the MME of the CN by mapping the eNB mapping identifier with the eNB S1-AP identifier and mapping the MME mapping identifier with the MME S1-AP identifier, wherein the eNB S1-AP identifier is comprised in an uplink S1-AP message from the RS and the MME S1-AP identifier is comprised in a downlink S1-AP message from the MME of the CN; (c) enabling the BS to receive and forward network packets and control signals between the RS and the CN based on the mapping table.