Local and wide-area transmissions in a wireless broadcast network

A wireless broadcast network and wide-area technology, applied in the field of communication, can solve the problem that the technology for distributing programs is not suitable for wireless broadcast networks

Active Publication Date: 2007-01-17
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because of these differences, the techniques used to distribute programming in cable broadcast networks are generally not suitable for wireless broadcast networks

Method used

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  • Local and wide-area transmissions in a wireless broadcast network
  • Local and wide-area transmissions in a wireless broadcast network
  • Local and wide-area transmissions in a wireless broadcast network

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Embodiment Construction

[0024] The word "exemplary" is used herein to mean "serving as an example, illustration or illustration". Any embodiment or design described herein as "exemplary" is not to be construed as preferred or advantageous over other embodiments or designs.

[0025] figure 1 Shown is a wireless broadcast network 100 that can broadcast different types of transmissions, such as wide area transmissions and local area transmissions. Wide area transmissions may be broadcast by a set of base stations in the network, which may include all or most of the base stations in the network. Typically, wide area transmissions are broadcast over a large geographic area. A subset of a given set of base stations for a given wide area transmission broadcasts each local area transmission. Typically, local area transmissions are broadcast over a small geographic area. For simplicity, the large geographical area of ​​wide area transmission is also referred to as wide coverage area or simply "wide area",...

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Abstract

TO BROADCAST DIFFERENT TYPES OF TRANSMISSION HAVING DIFFERENT TIERS OF COVERAGE IN A WIRELESS BROADCAST NETWORK, EACH BASE STATION PROCESSES DATA FOR A WIDE-AREA TRANSMISSION IN ACCORDANCE WITH A FIRST MODE (OR CODING AND MODULATION SCHEME) TO GENERATE DATA SYMBOLS FOR THE WIDE-AREA TRANSMISSION AND PROCESSES DATA FOR A LOCALTRANSMISSION IN ACCORDANCE WITH A SECOND MODE TO GENERATE DATA SYMBOLS FOR THE LOCAL TRANSMISSION. THE FIRST AND SECOND MODES ARE SELECTED BASED ON THE DESIRED COVERAGE FOR WIDE-AREA AND LOCAL TRANSMISSIONS, RESPECTIVELY. THE BASE STATION ALSO GENERATES PILOTS AND OVERHEAD INFORMATION FOR LOCAL AND WIDE-AREA TRANSMISSIONS. THE DATA, PILOTS AND OVERHEAD INFORMATION FOR LOCAL AND WIDE-AREA TRANSMISSIONS ARE MULTIPLEXED ONTO THEIR TRANSMISSION SPANS, WHICH MAY BE DIFFERENT SETS OF FREQUENCY SUBBANDS, DIFFERENT TIME SEGMENTS, OR DIFFERENT GROUPS OF SUBBANDS IN DIFFERENT TIME SEGMENTS. MORE THAN TWO DIFFERENT TYPES OF TRANSMISSION MAY ALSO BE MULTIPLEXED AND BROADCAST.

Description

[0001] This application claims priority to US Provisional Application No. 60 / 514,152, filed October 24, 2003, entitled "Method for Transmitting Local and Wide-Area Content over a Wireless Multicast Network." field of invention [0002] The present invention relates generally to communications, and more particularly to data transmission in wireless communications networks. technical background [0003] In order to provide various services to a large number of users, wireless and wireline broadcasting networks are widely deployed. A common broadcast cable network is a wired network that delivers multimedia content to a large number of homes. Typically, a wired network includes headends and distribution nodes. Each headend receives programs from various sources, generates a separate modulated signal for each program, multiplexes the modulated signals of all programs onto one output signal, and sends its output signal to the distribution node. Each program can be distributed o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04H1/00H04L12/18H04L12/56
Inventor 拉马斯瓦米·穆拉利林福远拉吉夫·维贾亚恩肯特·G·沃克阿肖克·曼特拉瓦迪阿南德·D·苏布拉马尼亚姆
Owner QUALCOMM INC
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