Mobile communication terminal and method of detecting received signal strength

A technology of mobile communication terminal and reception strength, applied in wireless communication, selection device, communication between multiple stations, etc., can solve the problems of delay, communication quality degradation, communication time extension, etc.

Inactive Publication Date: 2003-11-12
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, in the conventional wireless receiving apparatus, since the number of times of extracting the receiving strength is the same, regardless of the receiving strength of each pilot signal A, B, C, and D, there is a problem that the received strength of each pilot signal reaches The strength detection timing takes a long time, and the selection of the handover destination cell B in the console is delayed
[0011] Due to the delay in the selection of the handover destination cell B, the handover of the mobile station to the base station located in the cell B with the highest reception strength is also delayed. The communication time of the communicating base station is extended, and the communication quality is degraded

Method used

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  • Mobile communication terminal and method of detecting received signal strength
  • Mobile communication terminal and method of detecting received signal strength
  • Mobile communication terminal and method of detecting received signal strength

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] image 3 It is a block diagram showing the structure of the wireless receiving device in the mobile communication terminal device according to the first embodiment of the present invention.

[0025] In radio receiving apparatus 101 , receiving unit 103 applies predetermined radio processing and demodulation processing to each pilot signal of a mobile station peripheral cell received by antenna 102 .

[0026] The strength extracting unit 104 applies despreading processing to the pilot signal demodulated by the receiving unit 103 using the phase and spreading code specified by the control unit 107, and extracts the received strength of the pilot signal.

[0027] The strength table 105 stores the reception strength of each pilot signal extracted by the strength extraction unit 104 until the reception strength detection timing described later is reached. In addition, the strength meter 105 calculates the average value of the reception strength of each pilot signal when the...

Embodiment 2

[0052] use image 3 and Figure 5 Embodiment 2 of the present invention will be described. Figure 5 It is a schematic diagram of an operation in which the radio receiving apparatus 101 detects the reception strength of each pilot signal of the cells surrounding the mobile station.

[0053] The basic structure of wireless receiving apparatus 101 of the second embodiment is substantially the same as that of the first embodiment, and the method of setting the timing of detection of reception strength preset in the strength table 105 is different from that of the first embodiment. Therefore, only the reception strength detection timing will be described here, and other descriptions will be omitted. In addition, a description will be given assuming that the preset number of times and the threshold are set to the same values ​​as in the first embodiment.

[0054] In Embodiment 1, the reception strength detection timing is the timing at which the reception strength of pilot signa...

Embodiment 3

[0059] use image 3 and Figure 6 Embodiment 3 of the present invention will be described. Figure 6 It is a schematic diagram of the operation of the radio receiving apparatus 101 to detect the reception strength of each pilot signal of the cells surrounding the mobile station.

[0060] The basic configuration of wireless receiving device 101 of the third embodiment is substantially the same as that of the first embodiment, and the operation of the control unit 107 is different from that of the first embodiment. Therefore, only the operation of the control unit 107 and the reception strength detection timing will be described here, and other descriptions will be omitted. In addition, a description will be given assuming that the preset number of times and the threshold are set to the same values ​​as in the first embodiment.

[0061] The control unit 107 removes, from the candidate handover destination cells, the cells where the base stations that transmit the pilot signal...

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Abstract

A comparator (106) compares the strength of received pilot signals stored in a strength table (105) with a predetermined reception threshold and informs a controller (107) of the pilot signals exceeding the predetermined threshold. The controller (107) instructs a strength sampler (104) to increase the frequency of strength sampling for the pilot signals exceeding the predetermined threshold. The strength sampler (104) samples the strength of pilot signals at the instructed frequency. When the samples reach a predetermined number, the strength table (105) detects the strength of the pilot signals.

Description

technical field [0001] The present invention relates to a mobile communication terminal device and a method for detecting reception strength in mobile communication systems such as mobile phones and car phones. Background technique [0002] Handover in a mobile communication system using Code Division Multiple Access (CDMA) is realized by the mobile station detecting the reception strength of neighboring cells and reporting the detected reception strength to the control station via the communicating base station. [0003] That is, the mobile station despreads pilot signals received from a plurality of base stations located in neighboring cells, and detects the reception strength of each pilot signal. The control station compares the reception strengths of the pilot signals of the surrounding cells notified by the mobile station to the control station via the communicating base station, and selects the cell with the highest reception strength of the pilot signal as the handov...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H04B7/26H04B7/02H04W24/00H04W36/30H04W36/36
CPCH04B17/318H04W36/30H04B17/0057H04B7/022H04W36/362H04W36/302
Inventor中野隆之
OwnerPANASONIC CORP