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Base station connection method and radio internet controller and mobile station

A technology of wireless network control and connection method, applied in the field of wireless network control device and mobile station, can solve the problem of not considering the directional beam signal transmission and reception of the base station, and achieve the effect of improving the quality of signal reception

Inactive Publication Date: 2004-03-10
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to the above-mentioned prior art, when the base station is switched during the transfer or the mobile station is on standby, whether the base station is suitable for receiving and sending directional beam signals is not considered, so it is not an appropriate control aimed at improving the receiving quality of the base station and the mobile station.

Method used

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  • Base station connection method and radio internet controller and mobile station
  • Base station connection method and radio internet controller and mobile station
  • Base station connection method and radio internet controller and mobile station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] First, the first embodiment of adding a radio link to connect to the base station 120 when the mobile station 100 transfers will be described.

[0086] Figure 10 The relationship between the position of the mobile station 100 and the received power of the common pilot channel signal in the first embodiment is shown. It is assumed that the base station BS1 is a base station not suitable for directional beam signal reception.

[0087] The power measurement unit 108 of the mobile station 100 measures the received power of the common pilot channel signal transmitted by the surrounding base stations BS1 and BS2 with constant transmission power at predetermined time intervals, and transmits the measurement results to the RNC 140 .

[0088] The base station connection unit 110 of the mobile station 100 establishes a radio link with the source base station of the common pilot channel signal whose measured received power is the largest, sets a dedicated channel, and transmits ...

Embodiment 2

[0105] Next, a second embodiment of deleting the radio link connection destination base station 120 when the mobile station 100 transfers will be described.

[0106] Figure 12 The relationship between the position of the mobile station and the received power of the common pilot channel signal in the second embodiment is shown. It is assumed that the base station BS2 is not suitable for receiving the directional beam signal.

[0107] When the base station BS2 is added in addition to the base station BS1 among the radio link connection destinations and handover is started, the mobile station (MS) 100 communicates with the base station BS1 and the base station BS2.

[0108] Thereafter, when the mobile station 100 moves away from the base station BS1 and approaches the base station BS2, the received power of the common pilot channel signal from the base station BS2 becomes larger than the received power of the common pilot channel signal from the base station BS1.

[0109] The ...

Embodiment 3

[0124] Next, a third embodiment of switching the radio link connection target base station 120 when the mobile station 100 is on standby will be described.

[0125] Figure 14 The relationship between the position of the mobile station 100 and the received power of the common pilot channel signal in the third embodiment is shown. It is assumed that the base station BS1 is a base station not suitable for directional beam signal reception.

[0126] The power measurement unit 108 of the mobile station (MS) 100 measures the received power of the common pilot channel signal transmitted with a certain transmission power by surrounding base stations such as base station BS1 and base station BS2 at predetermined time intervals. The base station connection unit 110 of the mobile station 100 establishes a radio link with the base station of the source base station of the common pilot channel signal whose measured received power is the largest, and the mobile station 100 enters the stan...

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Abstract

A method for connecting the radio link between a mobile station and a base station is provided to improve quality of received signals at the base station and the mobile station. A radio network controller (RNC) monitors the difference between the reception power of signals from the source base station BS1 and the destination base station BS2. If the base station BS2 is incapable of directional beam signal transmission and reception, and when the reception power difference becomes smaller than a first handover threshold, the radio network controller adds the base station BS2 as a radio link connection destination of the mobile station. If the base station BS2 is capable of directional beam signal transmission and reception, and when the reception power difference becomes smaller than a second handover threshold, which is larger than the first handover threshold, the radio network controller adds the base station BS2 as a radio link connection destination of the mobile station.

Description

technical field [0001] The present invention relates to a method for connecting a mobile station to a base station in a mobile communication system in which a base station suitable for receiving and sending directional beam signals and a base station not suitable for receiving and sending directional beam signals coexist, and a wireless network control system using the method devices and mobile stations. Background technique [0002] The DS-CDMA (Direct Sequence-Code Division Multiple Access) communication method is a method in which multiple mobile stations communicate with the base station in the same frequency band. According to the DS-CDMA method, the signals sent and received by each mobile station are identified by the diffusion code. The diffusion code adopts an orthogonal code, such as a gold code (gold code). [0003] When sending and receiving signals between a specific mobile station and the base station, in the process of inverse diffusion, the sending and rece...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/12H04W36/20H04W36/36H04W36/38H04W48/20H04W92/10
CPCH04W36/12H04W16/28H04W36/00837
Inventor 大川耕一田中晋也中村武宏
Owner NTT DOCOMO INC
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