Communications system, communications apparatus, communications terminal and communications method
View Patent ↗According to a communications method according to the present invention, data is transmitted from a base station to two or more terminals via a common channel, and transmission power, with which the data is transmitted from the base station to the two or more terminals, is controlled according to a reception state of at least one of the two or more terminals. Furthermore, the terminal transmits reception capability information at a time of selection combining, and at least one of the two or more base stations receives the reception capability information at the time of selective combining and notifies the reception capability information to a radio network controller (RNC) which controls the two or more base stations. When a connection request is issued to the terminal, the RNC refuses assignment of a dedicated channel to the connection request when determining that the assignment of the dedicated channel to the terminal cannot be done based on the reception capability information at the time of selective combining.
1. A communication method which is executed by a Multimedia Broadcast Multicast Service (MBMS) system which broadcasts multimedia data from at least one base station to communications terminals using at least one common channel which is used for the multimedia data transmission, comprising:
receiving the multimedia data transmitted via the at least one common channel from the at least one base station;
receiving dedicated data transmitted via a dedicated channel set up for a specific communications terminal;
carrying out a selective combining operation to select the multimedia data from among two or more sets of multimedia data when the sets of multimedia data transmitted via two or more common channels are received in the multimedia data receiving step; and
signaling to a core network to stop the reception of the dedicated data via the dedicated channel when the terminal is not able to perform simultaneously the reception of the multimedia data by the multimedia data receiving step and the reception of the dedicated data by the dedicated data receiving step during the selective combining operation.
2. A communication system applicable to a Multimedia Broadcast Multicast Service (MBMS) system in which at least one base station broadcasts a multimedia data using at least one common channel which is used for the multimedia data transmission, the communication system comprising:
a communications terminal including:
a plurality of receiving units configured to receive the multimedia data transmitted via the at least one common channel from the at least one base station and to receive dedicated data transmitted via a dedicated channel set up for a specific communications terminal;
a selective combining unit configured to carry out a selective combining operation to select the multimedia data from among two or more sets of multimedia data when the sets of multimedia data transmitted via two or more common channels are received in the receiving units; and
a transmitting unit configured to transmit signaling to a core network to stop receiving the dedicated data via the dedicated channel when the communications terminal is not able to receive the multimedia data and the dedicated data simultaneously during the selective combining operation.