A mobile communication system and a base station therein

A technology of mobile communication system and mobile station, applied in the field of mobile communication system and its base station, which can solve the problems of deterioration of detection probability and increase of processing capacity, etc.

Active Publication Date: 2014-03-19
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0036] As shown in the above-mentioned Non-Patent Document 5, when using the cell-specific pilot signals of subframe #0 and #5 multiplexed with the synchronization channel to obtain the correlation degree, if the phase shift of the cell-specific scrambling code occurs, due to the subframe The phase of the cell-specific pilot signal of #5 is unknown, so blind detection can only be performed, resulting in an increase in processing capacity and a deterioration in detection probability

Method used

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  • A mobile communication system and a base station therein
  • A mobile communication system and a base station therein
  • A mobile communication system and a base station therein

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Figure 4 It is a block diagram showing the configuration of main parts of the base station transmitting apparatus according to the present invention.

[0078] Should Figure 4 The illustrated base station transmission device is configured to include: a data selection unit 1, a cell-specific pilot signal channel sequence storage unit 2, a cell-common pilot signal sequence storage unit 3, a pilot signal selection unit 4, a phase control unit 5, a first Synchronization channel storage unit 6, second synchronization channel storage unit 7, channel multiplexing unit 8, serial / parallel conversion processing unit 9, IFFT processing unit 10, guard interval (GI) insertion unit 11, wireless processing unit 12, transmission antenna 13.

[0079] The data selection unit 1 selects unicast data A or MBMS data B according to the schedule, and transmits data for one subframe to the channel multiplexing unit 8 . In the data selection unit 1, when the MBMS data B is selected, an instr...

Embodiment 2

[0118] Embodiment 2 is an example of applying Embodiment 1 to a system that can transmit downlink signals using any of a plurality of frequency bands. The configuration example of the base station and the configuration of the mobile station are the same as those described above. Figure 4 and Figure 7 The structures shown are essentially the same.

[0119] Figure 8 It is a diagram illustrating Embodiment 2, and it is Example I when there are 1200 subcarriers as a frequency band, Example II when there are 600 subcarriers, Example III when there are 300 subcarriers, Example IV when there are 144 subcarriers, and Example IV when there are 72 subcarriers. Example V when carrier.

[0120] In any one of the frequency bands I to V characterized by having a plurality of subcarriers, the synchronization channel SCH is transmitted in the center with a bandwidth W equal to the minimum frequency band of 72 subcarriers.

[0121] Figure 9 The phases of the cell-specific pilot signal...

Embodiment 3

[0127] Embodiment 3 is also an example applied on the premise of Embodiment 1, and the configurations of the base station transmission device and the mobile station are also the same as those described in Embodiment 1.

[0128]Embodiment 3 is the case where the cell-specific pilot signal in the MBMS subframe is sent only in a limited part of the band.

[0129] This configuration can be applied to a case where a unicast control signal is transmitted only in a limited part of the band in an MBMS subframe.

[0130] Figure 10 A configuration example of a radio frame according to Embodiment 3 is shown. That is, in Figure 10 In the example shown, subframes #0 and #2 are unicast subframes, and subframe #1 is an MBMS subframe. In the MBMS subframe, cell-specific pilot signals are multiplexed only on the first center four subcarriers of the subframe.

[0131] The phase control unit 5 sets the phase of the first cell-specific pilot signal to 23 in the subframe #1 in which the 19th...

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Abstract

The invention provides a mobile communication system and a base station therein. The mobile communication system comprises a base station and a mobile station which wirelessly communicates with the base station in a cell of a wireless communication area formed by the base station and which may mix and then transmit unicast data and broadcast/multicast data as downstream data from the base station to the mobile station. The base station enables same differences of two following initial phases: the difference between the initial phase of a cell inherent pilot signal transmitted in a subframe that the unicast data is transmitted and the initial phase of a cell inherent pilot signal transmitted in a following subframe, and the difference between the initial phase of a cell inherent pilot signal transmitted in a subframe that the broadcast/multicast data is transmitted and the initial phase of a cell inherent pilot signal transmitted in a following subframe.

Description

[0001] This application is a divisional application of an invention patent application with an application date of March 26, 2007, an application number of 2007800522334, and an invention title of "pilot signal transmission method, base station, mobile station and cellular system applicable to the method". technical field [0002] The present invention relates to a mobile communication system and a base station therein. Background technique [0003] In a cellular system, generally, a mobile station performs cell search processing for searching for a cell to which a radio link is connected. [0004] The cell search is performed using a synchronization channel (Synchronization Channel, SCH) included in a downlink radio frame. Furthermore, in addition to the synchronization channel, there are cases where a cell-specific pilot channel and broadcast channel (BCH) are used (Non-Patent Document 1). An example of cell search will be described with reference to the drawings. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707
Inventor 瀬山崇志
Owner FUJITSU LTD
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