Patent ID: 7647429
Filing Date: 2010-01-12
Classification: H04L,H04W

Abstract:
1. A method for providing point-to-multipoint services in a radio communication system, the method comprising: performing Internet protocol header compression to form header compressed data; in a point-to-point service, transmitting the header compressed data to one or more user equipment (UE) of the radio communication system; in a point-to-multipoint service, transmitting the header compressed data from a packet data convergence protocol (PDCP) entity to a plurality of UEs, wherein the header compressed data is transmitted over a common transport channel to each of the plurality of UEs of the radio communication system; wherein the Internet protocol header compression is performed in a PDCP entity located within a serving radio network controller (SRNC) in the case of the point-to-point service and within a controlling radio network controller (CRNC) in the case of the point-to-multipoint service, wherein in the case of the point-to-point service, the PDCP entity is located within a layer of a first network protocol stack that is located above a layer in which a radio link control (RLC) entity is located and above a layer in which a medium access control (MAC) entity is located; wherein the point-to-multipoint service is a multimedia broadcast/multicast service (MBMS) and one PDCP entity exists in the CRNC for the plurality of UEs of the radio communication system which individually receive the point-to-multipoint service from the CRNC in the case of the point-to-multipoint service, and wherein in the case of the point-to-multipoint service, the PDCP entity is located within a layer of a second network protocol stack, which does not include a physical layer, that is located above a layer in which a radio link control (RLC) entity is located, and above a layer in which a medium access control (MAC) entity is located.