# US 8,787,235 B2 · Method and apparatus for transmitting data in a wireless communication system

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- Number: US 8,787,235 B2
- Document ID: US8787235B2
- Status: Granted
- Kind: B2
- Application number: 13/063,068
- Filed: 2009-10-14
- Published: 2011-07-07
- Granted: 2014-07-22
- Earliest claimed: 2008-10-15
- Assignees: LG Electronics Inc.
- Applicants: Dong Cheol Kim; Min Seok Noh; Jin Sam Kwak; Seung Hee Han; Yeong Hyeon Kwon
- Inventors: Dong Cheol Kim; Min Seok Noh; Jin Sam Kwak; Seung Hee Han; Yeong Hyeon Kwon
- Web page: https://patentgrep.com/patent/US8787235B2

## CPC

- H04W 16/32: Hierarchical cell structures
- H04W 4/06: Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A data transmission method and apparatus in a wireless communication system is provided. The data transmission method include dividing a multicast broadcast single frequency network (MBSFN) zone including a plurality of cells into at least one sub-zone including at least one cell, enabling a plurality of cells belonging to the MBSFN zone to transmit first multicast broadcast service (MBS) data, and enabling the cell belonging to the at least one sub-zone to transmit sub-zone data superposed with the first MBS data, wherein the sub-zone data is second MBS data.

## Claims

### Claim 1

A data transmission method in a wireless communication system, the method comprising:
dividing, by at least one base station, a multicast broadcast single frequency network MBSFN zone including a plurality of cells into at least one sub-zone including at least one cell,
wherein the at least one sub-zone is configured only with all edge cells of the plurality of cells included in the MBSFN zone;
transmitting first multicast broadcast service (MBS) data through the plurality of cells belonging to the MBSFN zone; and
transmitting second MBS data through the all edge cells belonging to the at least one sub-zone transmitted,
wherein the second MBS data is retransmission data of the first MBS data only if the at least one sub-zone is configured with all edge cells in the MBSFN zone.

### Claim 2 (depends on 1)

The data transmission method of claim 1, wherein the first MBS data and the second MBS data are transmitted by multiplying different code sets.