Patent ID: 9648585
Date: 2017-05-09
CPC Classifications: H04L,H04W

Claim:
1. A method of transmitting data, the method comprising: determining, by a base station, a group air interface identity corresponding to an Internet Protocol, IP, broadcast address or an IP multicast destination address, wherein the group air interface identity is a Group Radio Network Temporary Identity, G-RNTI, wherein the base station is connected with a network side via an IP interface; configuring, by the base station, user equipments in a group with the group air interface identity, wherein the base station configuring the group air interface identity comprises: the base station transmitting the group air interface identity to each of the user equipments in the group in a downlink transmission bearer configuration command scrambled by a Cell Radio Network Temporary Identity, C-RNTI, of the user equipment; scheduling, by the base station, and transmitting data via an air interface using the group air interface identity; wherein scheduling, by the base station, and transmitting data via the air interface using the group air interface identity comprises: scheduling, by the base station, and transmitting data via the air interface over a specific group channel using the group air interface identity; wherein the specific group channel includes a logic channel Group Control Channel, GCCH, a logic channel Group Traffic Channel, GTCH, and a transport channel Group Channel, GCH, wherein the GCCH is configured to carry air interface configuration information of an IP multicast group, the GTCH is configured to carry IP multicast data packets with a same IP multicast destination address and with a same transmission characteristic or transmission characteristics in a same range; and the GCH is a point-to-multipoint transport channel configured to transport IP multicast data to all of user equipments in a group; and wherein the GCCH and the GTCH are mapped to the GCH and further to a Physical Downlink Shared Channel, PDSCH; or the GCCH and the GTCH are mapped to a Downlink Shared Channel, DL-SCH, and further to a Physical Downlink Shared Channel, PDSCH.