Patent ID: 8842597
Filing Date: 2014-09-23
Classification: H04W

Abstract:
1. A data transmission method, comprising: establishing, by a Relay Node, RN, a first correspondence relationship between a Multimedia Broadcast Multicast Service, MBMS, bearer identifier and a user plane data tunnel identifier of an MBMS session and a second correspondence relationship between the user plane data tunnel identifier of the MBMS session and an MBMS session identifier; and obtaining, by the RN, user plane data of the MBMS session transmitted from a Donor eNB, DeNB, according to the first correspondence relationship and transmitting the user plane data of the MBMS session to a User Equipment, UE, according to the second correspondence relationship; wherein the RN establishes the first correspondence relationship comprises: receiving, by the RN, an MBMS Session Start Request message sent from the DeNB and obtain therefrom the user plane data tunnel identifier of the MBMS session; and in a process of establishing or updating an MBMS bearer of a Un interface triggered by the DeNB, obtaining, by the RN, the MBMS bearer identifier and establishing the first correspondence relationship between the MBMS bearer identifier and the user plane data tunnel identifier of the MBMS session.