Radio communication apparatus

• US 20050128996A1
• Filed: 11/04/2004
• Published: 06/16/2005
• Est. Priority Date: 11/07/2003
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Kawamoto, Kiyoshi, Yoshida, Akihiko, Mazawa, Shiro, Takahashi, Yosuke, Usuba, Keiji
• Granted Patent: US 7,724,724 B2
• Time in Patent Office: Days
• US Class Current: 370/349
• CPC Class Codes: H04B 7/2659 for data rate control
• CPC Class Codes: H04L 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06
• CPC Class Codes: H04W 28/12 using signalling between network elements
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services

Abstract

In order to realize such communication control as to reliably reconstruct communication information transmitted from a plurality of ANs at a plurality of ATs even when a BCMCS flow is added or deleted, a radio communication system includes a transmitter for transmitting control information necessary for the ATs to receive the communication information from a radio communication system at intervals of a predetermined period, and a controller for controlling to transmit a plurality of pieces of communication information to the ATs at intervals of a constant cycle and in synchronism with a transmission period of the control information.

Claims

1. A radio communication apparatus for communicating with a plurality of AT(Access Terminal)s, comprising:

a transmitter for transmitting control information necessary for said ATs to receive communication information from said radio communication apparatus to said ATs; and

a controller for controlling to transmit the communication information to said ATs at intervals of a constant cycle.

2. A radio communication apparatus for communicating with a plurality of ATs, comprising:

a transmitter for transmitting control information necessary for said ATs to receive communication information from said radio communication apparatus at intervals of a predetermined period to said ATs; and

a controller for controlling to transmit a plurality of pieces of the communication information to said ATs at intervals of a predetermined constant cycle and in synchronism with a transmission period of said control information.

3. A radio communication apparatus according to claim 2, wherein the control information transmitted from said transmitter to said ATs include information about a transmission time and a transmission timing in said constant cycle at which each piece of communication information is transmitted to said ATs.

4. A radio communication apparatus according to claim 3, wherein said controller allocates said pieces of communication information in said constant cycle using the information about the transmission time and the transmission timing, and transmits the allocated information in synchronism with the transmission period of said control information.

5. A radio communication apparatus according to claim 2, wherein, when transmission of any of the plurality of pieces of communication information becomes unnecessary, said controller can shift the transmission timing of the communication information during said transmission having the transmission timing after said transmission-unnecessary information to a transmission timing position of said transmission-unnecessary information.

6. A radio communication apparatus connected to a plurality of AN(Access Network)s for wirelessly communicating with a plurality of ATs, comprising:

a first memory for storing information necessary for finding a transmission time of communication information to be transmitted from said ANs to said ATs;

a second memory for storing as a fixed value a cycle of transmitting a plurality of pieces of communication information from said ANs to said plurality of ATs in a broadcast manner;

a receiver for receiving an allocation request of said communication information from any of said plurality of ANs;

a processor, on the basis of said allocation request received at said receiver and information of said first memory, for finding a transmission time of said communication information and finding timing of transmitting said communication information in said fixed cycle; and

a transmitter for transmitting information about the transmission time and the transmission timing of said communication information found by said processor to said ANs.