METHOD AND APPARATUS FOR PROVIDING MULTI-RATE BROADCAST SERVICES

摘要

A method and apparatus for providing multi-rate broadcast services in a wireless communication system are disclosed. The present invention takes advantage of the higher capacity of better channels by providing a certain data rate common to all users, while sending additional information to users with better channel conditions. A base station transmits a broadcast message including common information at a basic rate and additional information at a rate higher than the basic rate. The basic rate guarantees successful receipt by all WTRUs in a coverage area and the rate for the additional information is set such that only certain WTRUs with a channel condition above a threshold may decode the additional information successfully. The WTRU decodes the common information and subtracts the common information from received signals to decode the additional information. The additional information may be information supplementing the common information, such as video information.

主权项

1. A wireless transmit/receive unit (WTRU) comprising:
a receiver configured to receive a broadcast signal having a first part and a second part; wherein the first part includes basic information and is received at a first data rate that is common to all wireless transmit/receive units (WTRUs) in a coverage area; and wherein the second part includes additional information received at a higher data rate that only a subset of WTRUs in the coverage area are able to decode, wherein the WTRU is in the subset of WTRUs and wherein the subset of WTRUs have a channel condition above a threshold.