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Radio base station appts. and communication terminal appts.

A wireless base station and communication terminal technology, applied in wireless communication, communication between multiple stations, and selection devices, etc., can solve the problems of wasting frequency bands, wasting frequency bands, and not being able to fully use the allocated frequency bands, etc.

Inactive Publication Date: 2003-02-19
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, if image 3 As shown, if a margin is reserved on the channel in advance for retransmission of data, then in the interval where data retransmission is not performed ( image 3 In the slashed area), the allocated frequency band cannot be fully used, and the allocated frequency band is wasted
[0007] For example, when the data rate is 64kbps and the allocated channel is 70kbps, assuming that 100 users communicate at the same time, the wasted frequency band is 6kbps×100=600kbps, which is very large

Method used

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  • Radio base station appts. and communication terminal appts.
  • Radio base station appts. and communication terminal appts.
  • Radio base station appts. and communication terminal appts.

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as Figure 4 As shown, in this embodiment, the following situation is described: the base station (BS) performs wireless communication with the communication terminal of user A and the communication terminal of user B, the data is sent by a dedicated channel, and the retransmission data is sent by a common channel.

[0033] Figure 5 is a block diagram showing the configuration of the radio base station apparatus according to Embodiment 1 of the present invention.

[0034] User A transmission data (transmission data other than retransmission data) generated by a data generation unit (not shown) is sent to dedicated channel spreading unit 201, and subjected to spread modulation processing using code #0. The spread-modulated data is sent to the quadrature modulation unit 204 , where quadrature modulation such as QPSK (Quadrature Phase Shift Keying; Quadrature Phase Shift Keying) is performed, and output to the multiplexing unit 207 .

[0035] User B transmission da...

Embodiment 2

[0064] In this embodiment, a case will be described in which the transmission power of the common channel for transmitting retransmission data is adjusted according to the retransmission status.

[0065] Figure 9 It is a block diagram showing the configuration of a radio base station apparatus according to Embodiment 2 of the present invention. exist Figure 9 in, right with Figure 5 The same part is appended with Figure 5 The same reference numerals are used, and their detailed descriptions are omitted.

[0066] Figure 9 The wireless base station device shown is in addition to Figure 5 In addition to the configuration of the shown radio base station apparatus, it further includes a retransmission count counter 602 that measures the retransmission count, and a power adjustment unit 601 that adjusts transmission power according to the retransmission count.

[0067] In this embodiment, power adjustment is only performed on the channel for sending retransmission data a...

Embodiment 3

[0075]In this embodiment, a case where transmission data other than retransmission data is transmitted using a common channel will be described.

[0076] Figure 10 It is a block diagram showing the configuration of a radio base station apparatus according to Embodiment 3 of the present invention. exist Figure 10 in, right with Figure 5 The same part is appended with Figure 5 The same reference numerals are used, and their detailed descriptions are omitted. Figure 11 is a block diagram showing the configuration of a communication terminal device according to Embodiment 3 of the present invention. exist Figure 11 in, right with Figure 6 The same part is appended with Figure 6 The same reference numerals are used, and their detailed descriptions are omitted.

[0077] Figure 10 The wireless base station unit shown includes: replacing Figure 5 The individual channel spreading units 201 and 202 of the shown wireless base station apparatus, the common channel spre...

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PUM

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Abstract

Wireless base station apparatus and communication terminal apparatus that perform wireless transmission with high capacity, without losing the real time aspect where several users engage in communication simultaneously. User A's and user B's transmit data are respectively sent to dedicated CH spreading sections 201 and 202 for spreading-modulation processing using codes #0 and #1. The spread-modulated data are each orthogonal-modulated in orthogonal modulating sections 204 and 205 and output to multiplexing section 207. User A's and user B's transmit data buffered in retransmit buffer 215 are sent to shared CH spreading section 203 for spreading-modulation processing using code #2. The spread-modulated data are orthogonal-modulated in orthogonal modulating section 206 and output to multiplexing section 207. In multiplexing section 207, data respectively orthogonal-modulated are multiplexed, and, after predetermined wireless transmission processing is executed in radio frequency transmitting section 208, transmitted via antenna 209 to communication terminals as a downlink channel signal.

Description

technical field [0001] The present invention relates to a wireless base station device and a communication terminal device in a digital wireless communication system, especially a CDMA (Code Division Multiple Access; Code Division Multiple Access) system. Background technique [0002] With the development of digital wireless communication systems in recent years, streaming data distribution services such as moving images can be practically implemented by wireless communication systems. In the streaming data distribution service, the transmission data rate is predetermined (for example, 64 kbps), and the channel of the data rate is also allocated on the wireless line. [0003] On the other hand, in the radio channel section of the digital radio communication system, if a data error occurs, retransmission control is performed on the erroneous data. [0004] Such as figure 1 As shown, when the base station (BS) transmits the downlink signal to user ...

Claims

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Application Information

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IPC IPC(8): H04B1/707H04B1/04H04B7/26H04J13/00H04J13/16H04W4/06H04W16/02H04W28/00H04W28/04H04W72/04H04W92/10
CPCH04B7/2628H04L1/1692H04L1/1893H04B1/0483H04B1/69H04W88/02H04W88/08
Inventor 三好宪一上杉充
Owner PANASONIC CORP
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