Wireless base station, wireless base station selection method, multicast signal transmission method, and wireless terminal

Abstract

One preferred embodiment of the invention provides a wireless base station which provides a multicasting service to simultaneously transmit identical data to a plurality of wireless terminals. A wireless base station is connected to a plurality of wireless terminals and provides a multicasting service for a plurality of wireless terminals. The wireless base station determines autonomously whether it provides the multicasting service for the plurality of wireless terminals. Another preferred embodiment of the invention provides a method of selecting a wireless base station for a wireless terminal, the wireless base station providing a multicasting service for the wireless terminal. When the wireless terminal can receive the same multicasting information from a plurality of wireless base stations, the wireless terminal selects one of the plurality of wireless base stations so as to make the number of the wireless base stations that send the same multicasting information as small as possible.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a wireless base station which provides a multicasting service to simultaneously send identical data to a plurality of wireless terminals, and relates to a method of selecting a wireless base station, a method of transmitting a multicast signal, and a wireless terminal. BACKGROUND OF THE INVENTION [0002] Generally, in a wireless communication system, a number of wireless base stations have respective service areas to which the service of each base station is provided, and the service areas of the wireless base stations are overlapped each other. [0003] In the IP (Internet protocol) network, there is an increasing demand for broadcasting communication applications, such as music or vide distributions. The studies of the protocols suitable for such applications in the IP network have been carried out. Hence, the wireless access communication system that supports the multicasting service is the important issue. [0004] Multic...

AI Technical Summary

Benefits of technology

[0013] In order to eliminate the above-mentioned problems, one object of the present invention is to make efficient use of the radio resources and lower the maintenance and operation cost.

Problems solved by technology

Hence, the wireless access communication system that supports the multicasting service is the important issue.

However, the service areas of wireless base stations are not necessarily appropriate for providing the wireless terminals with the multicasting services.

Hence, in the present example, the multicasting service provided to the wireless terminal “a” by the wireless base station A is inefficient.

The radio resources are utilized inefficiently in the present example, and the efficiency of utilization of the radio resources is lowered.

Such conventional method requires high cost from the standpoint of maintenance and operation.

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