Base station device and packet transmission method
A technology of base station and modulation mode, applied in the direction of transmission modification based on link quality, transmission system, adjustment of transmission rate, etc., can solve problems such as no public scheduling technology
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Embodiment 1
[0021] In Embodiment 1 of the present invention, in '(b) the communication terminal device estimates or estimates the quality of the downlink and reports it to the base station device, and the base station device sets the most suitable transmission format according to the reported value ( That is, a method of "modulation scheme and error correction coding scheme"), and a case where a combination of a modulation scheme and an error correction coding scheme suitable for each service class is determined will be described. In addition, in this embodiment, it is assumed that radio resources are allocated by the maximum C / I method.
[0022] Fig. 1 is a block diagram showing the configuration of a base station apparatus according to Embodiment 1 of the present invention. In Figure 1, the base station device has:
[0023] An antenna 101 , a duplexer 102 , a receiving RF unit 103 , a demodulation unit 104 , an error correction decoding unit 105 , a separation unit 106 , and an ARQ con...
Embodiment 2
[0043] In Embodiment 2 of the present invention, regarding the method of setting an appropriate transmission format (i.e. modulation method and error correction coding method) by the base station device without receiving a report from the communication terminal device in (c)", it is determined The combination of the modulation scheme and the error correction coding scheme most suitable for each service class will be described.
[0044] Fig. 3 is a block diagram showing the configuration of a base station apparatus according to Embodiment 2 of the present invention. In addition, in the base station apparatus in FIG. 3, the same components as those in FIG. 1 are given the same symbols as those in FIG. 1, and detailed description thereof will be omitted.
[0045] The base station apparatus in FIG. 3 has a configuration in which a radio channel quality estimating unit 301 is added to that in FIG. 1 . Furthermore, in the base station apparatus of FIG. 3 , the role of MCS selection...
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