Data synchronization for multicast/broadcast service in wireless relay network

A multicast broadcast service and relay network technology, applied in the field of data synchronization for multicast/broadcast services in wireless relay networks, can solve problems such as weak signal strength and increased wireless communication error rate

Inactive Publication Date: 2009-01-28
ZTE (USA) INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the edge of a wireless cell, the signal strength may be weak, thus potentially increasing the error rate in wireless communication

Method used

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  • Data synchronization for multicast/broadcast service in wireless relay network
  • Data synchronization for multicast/broadcast service in wireless relay network
  • Data synchronization for multicast/broadcast service in wireless relay network

Examples

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Embodiment Construction

[0020] Among other things, the present application describes systems, devices and methods for providing synchronous data transmission for multicast / broadcast services over OFDMA wireless relay networks.

[0021] Figure 1 shows an example of a wireless mobile relay accessing a network. Referring to FIG. 1, a traffic flow of a Multicast Broadcast Service (MBS) can be transmitted from a BS to a plurality of MSs through a unidirectional point-to-multipoint connection. One MBS service flow can be transmitted through a group of BSs forming the service area of ​​the MBS service flow. In order to improve the wireless coverage area of ​​the BS, signal transmission from the BS to the MS may pass through one or more relay stations (RS). In an OFDMA wireless relay network, for a multi-BS MBS, a group of BSs and associated multiple RSs form a service area to provide MB services to MSs. For single-BS MBS, the BS and its associated RS form a traffic area to transmit MBS data to the MB in c...

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Abstract

The invention discloses wireless communication relay networks and techniques for providing data synchronization in Multicast Broadcast Services (MBS). In one aspect, a wireless communication relay network includes a plurality of base stations forming a radio network; a plurality of relay stations in communication with the base stations, each relay station being slaved to a base station to extend radio coverage of the base station; a Multicast Broadcast Services (MBS) scheduler to determine a target transmission time for transmitting a MBS data packet for one or more base stations; a mechanismto operate a base station to send the target transmission time along with the MBS data packet to one or more relay stations that carry the MBS service; and a mechanism to operate, a respective relay station in a relay path of the MBS data packet from the base station, to transmit the MBS data packet to a subscriber or mobile station in the network at the target transmission time, and to send a failure indication to a base station when the relay station is not able to transmit the MBS data packet due to a late arrival or abnormal early arrival of the MBS data packet.

Description

technical field [0001] This application claims priority to U.S. Provisional Application No. 60 / 910,559, entitled "Data Synchronization for Multicast / Broadcast Services in Wireless Relay Networks," filed April 6, 2007, the entire contents of which are incorporated in This is part of the specification for this application. Background technique [0002] The present application relates to wireless communication systems and techniques for using one or more relay stations for wireless communication in addition to base stations. [0003] Wireless communication systems use electromagnetic waves to communicate with fixed and mobile wireless communication devices, such as mobile wireless phones and portable computers with wireless communication cards, which are located within cells of the system's coverage area. A range or band of radio spectrum designated or allocated for radio communication services or a particular class of radio services may be divided into different radio carrier...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L7/00H04L1/16H04L12/18H04B7/26H04W72/00
CPCH04W84/047H04B7/2606H04W72/005H04W28/04H04W72/30
Inventor 江辉曲红云许玲周白立
Owner ZTE (USA) INC
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