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Base station device, mobile station device, communication system, and communication method

A mobile station and base station technology, applied in the baseband system, communication between multiple stations, transmission system, etc., can solve the problems of increased circuit scale and increased calculation amount of mobile station devices, and achieve the reduction of selection error probability, The effect of reducing the time spent and reducing the number of candidates

Inactive Publication Date: 2010-07-07
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] However, in the conventional method of multiplying two types of scrambling codes, in order to specify the S-SCH to be scrambled, many inverse scrambling codes are required, which increases the circuit scale of the mobile station apparatus and increases the amount of calculation. question

Method used

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  • Base station device, mobile station device, communication system, and communication method
  • Base station device, mobile station device, communication system, and communication method
  • Base station device, mobile station device, communication system, and communication method

Examples

Experimental program
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no. 1 Embodiment approach

[0102] The first embodiment of the present invention will be described below. figure 1 It is a block diagram showing an example of the configuration of the mobile station device according to the first embodiment of the present invention. The mobile station device consists of a receiving unit 10, a control unit 11, a demodulation unit 12, a control signal processing unit 13, a data processing unit 14, a downlink synchronization adjustment unit 15, a cell search unit 16, a cell information processing unit 17, a coding unit 18, a modulation unit 19, transmission unit 20, and upper layer 21.

[0103] A reception signal (transmission signal from the base station apparatus) is received by the reception unit 10 . According to an instruction from the control unit 11 , a reception signal is sent to the cell search unit 16 if the cell search sequence is in progress. If the cell search sequence is step 1, the cell search unit 16 detects one sequence from three P-SCH sequences, and per...

no. 2 Embodiment approach

[0134] Next, a second embodiment of the present invention will be described. In the second embodiment, a method of expressing frame timing using individual scrambling codes is shown. The details of the SCH signal generation section except the configuration of the base station apparatus become Figure 9 , The details of the cell search unit in the configuration of the mobile station apparatus are as follows: Figure 10 In addition, you can use the figure 1 and figure 2 same structure. In addition, S-SCH configuration can be done with image 3 same. In this embodiment, two individual scrambling codes are determined based on the S-SCH1, and different subframe numbers are used in association with the scrambling codes.

[0135] Figure 8A For a scrambling code Dx determined on the basis of S-SCH1 (x indicates the sequence number of S-SCH1), subframe number #0 and subframe number #5 are multiplied by another different scrambling code to generate individual scrambling Examp...

no. 3 Embodiment approach

[0153] Next, a third embodiment of the present invention will be described. Figure 12 It is a diagram showing an example of the subcarrier mapping in which the S-SCH is arranged in the third embodiment. S-SCH is divided into S-SCH1 and S-SCH2. exist Figure 12 In , S-SCH1 and S-SCH2 are sequences with a code length of 31, which are alternately configured on the remaining subcarriers except the central DC subcarrier. No signal is allocated in the DC subcarrier. In addition, the subcarrier number at the left end is subcarrier #0, and the subcarrier number at the right end is subcarrier #62. In addition, as shown in the figure, in subframe number #0 and subframe number #5, the configurations of S-SCH1 and S-SCH2 are reversed.

[0154] in addition, Figure 12 Two methods of multiplication of individual scrambling codes in the subcarrier mapping method of S-SCH are considered.

[0155] (1) Regardless of the subframe number, an individual scrambling code is determined based o...

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Abstract

To reduce a number of codes that have to be held by a mobile station device by changing a scramble code by which a secondary synchronization channel of a different sub-frame number is multiplied while keeping the effect of randomizing an interference from an adjacent cell and also to reduce the circuit scale of the mobile station device and a calculation amount. A primary synchronization channel generation unit (50) for generating a primary synchronization channel according to base station device information, a secondary synchronization channel generation unit (51) for generating the secondary synchronization channel that is formed with a combination of a first signal and a second signal according to the base station device information, a first scramble code generation unit (52) for generating a first scramble code by which the secondary synchronization channel is multiplied according to the primary synchronization channel, and a second scramble code generation unit (53) for generating a second scramble code by which the second signal is multiplied according to the first signal are included.

Description

technical field [0001] The present invention relates to a base station apparatus and a mobile station apparatus applied to a multicarrier communication system, a communication system and a communication method using multicarriers. Background technique [0002] Currently, EUTRA (Evolved Universal Terrestrial RadioAccess, Evolved Universal Terrestrial Radio Access), which aims to increase the communication speed by introducing a part of technology for fourth-generation research into the third-generation frequency band, is being adopted by the standardization body 3GPP ( 3rd Generation Partnership Project (3rd Generation Partnership Project) research (non-patent literature 1). [0003] In EUTRA, as a communication method, it is decided to adopt an OFDMA (Orthogonal Frequency Division Multiple Access) method that is strong against multipath interference and suitable for high-speed transmission. In addition, the detailed specification related to the operation of the upper layer ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04B1/707H04B7/26H04J13/00H04J13/10
CPCH04J11/0069H04L25/03343H04L27/2647H04L5/0053
Inventor 上村克成坪井秀和
Owner SHARP KK