CN100518002C - Method for Improving System Coverage of Wideband Code Division Multiple Access Mobile Communication System - Google Patents

Abstract

The present invention discloses a method of raising the system coverage for a wideband code division multiple access mobile communication system, which comprises the increase of the coverage of an uplA method for raising system covering of wideband CDMA mobile communication system includes monitoring user up link / down link emission power in real time, decreasing user up link / down link service ink and the increase of the coverage of a downlink. The method is realized through the real-time monitoring to a user's up and down emission power; when the up and the down emission power exceeds the rate when rate down - adjusting threshold is exceeded at certain period of time, raising user up link / down link service rate if down link load is allowable when up link / down link emission rate of downward adjusted threshold of rate for a time, the up and the down service rates of the user are reduced; if the up and the down emission power of a UE is smaller than the upward adjusted threshold oUE is less than rate up - adjusting threshold at certain period of time. f the rate after a time according to a monitoring result, the up and the down service rates are enhanced if down load permits. The method provided by the present invention can solve the problem that different rate services cover differently, and in addition, the switching success ratio can be enhanced. The high rate services can also carry out continuous coverage through certain processing, and simultaneously, the system capacity can also be enhanced.

Description

Method for Improving System Coverage of Wideband Code Division Multiple Access Mobile Communication System

technical field

The invention relates to a wideband code division multiple access mobile communication system, in particular to a method for improving system coverage of a wideband code division multiple access mobile communication system.

Background technique

Wideband Code Division Multiple Access (WCDMA) mobile communication system is a system that can carry high-speed business rates, and its maximum rate can reach 2M bandwidth, while the most commonly used maximum rate is 384kbps, and the minimum rate can be adaptive multiple Rate (AdaptiveMulti-Rate: AMR) 4.75kbps of coded business. According to the principle of WCDMA system closed-loop power control, in order to make different service rates meet the required service quality, closed-loop power control will achieve the purpose of satisfying the service quality by adjusting the user's transmit power. However, under the limitation of the user's maximum transmit power, there will be situations where the user's service quality cannot be satisfied even if the maximum transmit power is used for transmission, then there will be a service coverage blind area at this time, which is commonly referred to as the coverage of different rate services. Phenomena caused by different ranges.

Generally speaking, when the coverage is certain, high-rate services require large transmit power, while low-rate services require low transmit power. Obviously, under certain power conditions, the coverage of high-rate services is smaller than that of low-rate services. Figure 1 is the coverage area map of different service rates of WCDMA system. It can be seen from Figure 1 that with the continuous increase of service rate, the user's coverage area is continuously decreasing, so which rate is used in networking Determining coverage and planning for capacity is critical to controlling costs. In terms of networking cost, the cost of using high-speed services to determine coverage is much higher than that of low-speed services. Therefore, in order to reduce the cost of networking and ensure continuous coverage of different service rates in the entire system, it is necessary to use appropriate Methods.

technical content

The technical problem to be solved by the present invention is to provide a method for improving system coverage of a broadband code division multiple access mobile communication system, so that high-rate services can be continuously covered in the entire system, to solve the problem of different coverage of different rate services, and to improve handover Success rate.

In order to achieve the above object, the present invention provides a method for improving system coverage of a wideband code division multiple access mobile communication system, for improving the coverage of uplink and/or downlink, comprising the following steps:

(1) Setting the rate adjustment threshold of the mobile communication terminal service transmission power on the radio network controller side;

(2) Acquire the service transmission power of the mobile communication terminal or obtain the reporting event at the radio network controller side, and the service transmission power includes uplink service transmission power and/or downlink service transmission power;

(3) The radio network controller side adjusts the service rate of the mobile communication terminal according to the difference between the service transmission power of the mobile communication terminal and the rate adjustment threshold or the reported event, and the service rate includes an uplink service rate and/or downlink traffic rate,

Wherein, the transmit power of the uplink service of the mobile communication terminal is reported by the mobile communication terminal to the radio network controller, and the mobile communication terminal, according to the relevant threshold value sent by the radio network controller side, when monitoring the event trigger , report the measurement report to the radio network controller side,

The downlink service transmission power of the mobile communication terminal is reported by the Node B to the radio network controller, and the Node B reports a measurement report to the radio network controller when an event trigger is detected according to the relevant threshold value sent by the radio network controller .

The present invention judges in real time the distance between the user and the base station or whether the signal in the area where the user is located is poor according to the user's uplink and downlink transmission power, thereby reducing the real-time service rate of the user and improving service coverage. The method for improving system coverage of the wideband code division multiple access mobile communication system provided by the present invention can solve the problem of different coverage of different rate services, and can improve the handover success rate, so that high rate services can also be processed throughout the entire network through certain processing. The continuous coverage of the system can also increase the capacity of the system.

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Figure 1 is a coverage diagram of different service rates of the WCDMA system;

Fig. 2 is a step diagram of a specific embodiment of the uplink service rate adjustment of the technical solution of the present invention;

Fig. 3 is a step diagram of a specific embodiment of downlink service rate adjustment in the technical solution of the present invention.

Detailed ways

The method steps of the broadband code division multiple access mobile communication system mentioned in the present invention to improve system coverage are as follows:

Step 1: Set the rate-up threshold and rate-down threshold of the transmit power of different services;

Step 2: Real-time monitoring of UE (User Equipment) up and down transmit power;

Step 3: The radio network controller (Radio Network Control: RNC) judges whether to reduce the user's service rate or increase the user's service rate according to the UE's uplink and downlink transmission power: when the UE's transmission power is high, the user's service rate is lowered. The real-time service transmission rate of the UE; when the transmission power of the UE is relatively low, the real-time service transmission rate of the user is increased.

Among them, the first step includes:

Set the rate increase threshold of the service uplink transmit power: including the rate increase start threshold and rate increase termination threshold;

Set the rate reduction threshold of the service downlink transmit power: including the rate reduction start threshold and rate reduction termination threshold;

The second step includes:

The UE periodically reports the uplink transmission power of the UE, or the UE reports a measurement report to the RNC side when an event trigger is detected according to the relevant threshold value sent by the RNC side;

The Node B (Node B) periodically reports the downlink transmission power of the UE, or the Node B reports a dedicated measurement report to the RNC when an event trigger is detected according to the relevant threshold value sent by the RNC;

The third step includes:

When the uplink transmission power of the UE exceeds the rate reduction start threshold of the uplink transmission power for a period of time, start to reduce the uplink service rate of the UE;

When the UE is in the uplink rate reduction state, and the UE's uplink transmission power is between the rate reduction start threshold and the rate reduction termination threshold, the service rate will continue to be reduced after a period of time after the previous service rate reduction until the minimum rate of the service is reached or guaranteed rate;

When the UE's uplink transmission power is less than the rate downlink termination threshold of uplink transmission power after a period of time, stop downlinking the UE's uplink service rate;

When the uplink transmission power of the UE is less than the rate increase start threshold of the uplink transmission power after a period of time, if the uplink load is allowed to be adjusted up, the uplink service rate of the UE is increased;

When the UE's uplink service rate is allowed to be increased, and the UE's uplink transmit power is between the rate increase start threshold and the rate increase end threshold, if the uplink load is allowed to be increased, the UE's uplink service rate will continue to be increased until the service rate is reached. the maximum rate of

When the UE's uplink service rate is in a state where the uplink service rate is allowed to be adjusted, and the UE's uplink transmission power is greater than the rate increase termination threshold, stop the UE from increasing the uplink rate;

When the downlink transmission power of the UE exceeds the downlink transmission power rate reduction start threshold for a period of time, the downlink service rate of the UE is reduced;

When the UE is in the downlink rate reduction state, and the downlink transmission power of the UE is between the rate reduction start threshold and the rate reduction termination threshold, the service rate will continue to be reduced after a period of time after the previous service rate reduction until the minimum rate of the service is reached or guaranteed rate

When the downlink transmission power of the UE is less than the rate downlink termination threshold of the downlink transmission power after a period of time, stop downlink service rate reduction of the UE;

When the uplink transmission power of the UE is less than the rate increase start threshold of the downlink transmission power after a period of time, if the uplink load is allowed to be adjusted up, then increase the downlink service rate of the UE;

When the UE's downlink service rate is allowed to be increased, and the UE's downlink transmission power is between the rate increase start threshold and the rate increase end threshold, if the uplink load is allowed to be adjusted, the UE's downlink service rate will continue to be increased until it reaches the UE The maximum rate of downlink business;

When the downlink service rate of the UE is allowed to be increased, and the downlink transmit power of the UE is greater than the rate increase termination threshold, the UE is stopped from increasing the downlink service rate.

Fig. 2 is the specific embodiment of the uplink service rate adjustment used in the WCDMA system according to the technical solution provided by the present invention, wherein the event is defined as:

6A1 event: UE uplink transmit power exceeds the start threshold of uplink down-regulation

6B1 event: UE uplink transmit power is lower than uplink downlink termination threshold

6A2 event: UE uplink transmit power exceeds the uplink uplink termination threshold

6B2 event: UE uplink transmit power is lower than uplink uplink start threshold

A1 event: UE downlink transmit power exceeds downlink downlink start threshold

B1 event: UE downlink transmit power is lower than downlink downlink termination threshold

A2 event: UE downlink transmit power exceeds downlink uplink termination threshold

B2 event: UE downlink transmit power is lower than downlink uplink start threshold

This embodiment is aimed at the event reporting and measurement report mode for the UE. For the periodic reporting mode, the event judgment process is performed on the RNC side, and the subsequent actions are the same:

First RNC performs A401 step: the uplink down-regulation start threshold (6A1), the uplink down-regulation termination threshold (6B1), the uplink up-regulation start threshold (6A2) and the uplink up-regulation termination threshold (6B2) of the uplink transmission power of the UE are set for different service rates, and then Execute step A402: send an internal measurement control message to the UE, and notify the UE of the threshold value set in step A401 as the event threshold (6A1, 6B1, 6A2, 6B2). When the RNC monitors A501: the UE reports the 6A1 event, execute A502: set the UE uplink status to the down-regulation state, lower the first-level uplink service rate, and start the timer T; when the RNC monitors A601: the UE reports the 6B1 event, then execute Step A602: Set the UE uplink state to the non-adjusted state, and stop the downward adjustment of the uplink service rate; when the RNC monitors the A701 step: the UE reports the 6B2 event, then perform A702: set the UE uplink state to the uplink state, and if the uplink load allows the uplink service rate Adjust up, and start timer T; when RNC monitors step A801: UE reports 6A2 event, then execute step A802: set UE uplink status to non-adjustment status, stop uplink service rate up-regulation;

When the RNC monitors the A901 step: the timer T has not received any event reported by the UE, then execute the A902 step: judge whether the UE uplink state is the unadjusted state, if so, then execute the A904 step: keep the original state unchanged; Otherwise, go to step A903: judge whether the uplink status is down-regulated, if so, go to step A905: continue to down-regulate the uplink service rate, and start the timer, otherwise go to step A906: at this time, it means that the uplink status of the UE is in the up-up state, if the uplink load of the cell allows If the rate is increased, continue to increase the uplink service rate and start the timer T.

Fig. 3 is according to the concrete embodiment of the downlink service rate adjustment that the technical scheme provided by the present invention is used in WCDMA system, and this embodiment is to report the event report measurement report mode for Node B, for periodic report mode, then in The RNC side performs event judgment processing on it, and the follow-up actions are the same:

At first RNC carries out B401 step: the downlink downward adjustment start threshold (A1), the downlink downward adjustment termination threshold (B1), the downlink upward adjustment start threshold (A2) and the downlink upward adjustment termination threshold (B2) of the user's downlink transmission power are set for different service rates, and then Execute step B402: send a dedicated measurement initialization message to Node B, and notify NodeB of the threshold value set in step B401 as the event threshold (A1, B1, A2, B2). When the RNC monitors B501: Node B reports the A1 event, execute B502: set the UE downlink status to the downlink state, lower the downlink service rate by one level, and start the timer T; when the RNC monitors B601: Node B reports the B1 event, Then perform step B602: set the UE downlink state to the non-adjusted state, and stop the downward adjustment of the downlink service rate; when the RNC monitors the B701 step: the Node B reports the B2 event, then perform B702: set the UE downlink state to the upward adjustment state, if the downlink load allows The downlink service rate is raised, and timer T is started; when the RNC monitors step B801: Node B reports the A2 event, then executes step B802: setting the UE downlink state to the non-adjusted state, and stopping the uplink service rate increase;

When RNC monitors step B901: timer T has not received any event reported by Node B, then execute step B902: judge whether the UE downlink state is not adjusted state, if so, execute step B904: keep the original state unchanged ; Otherwise, perform step B903: judge whether the UE downlink status is a downlink state, if so, perform step B905: continue to downlink the downlink service rate, and start the timer T, otherwise perform B906 step: at this time, the UE downlink status is in the uplink state, if the downlink The load is allowed to continue to increase the downlink service rate and start the timer T.

Of course, the present invention can also have other various embodiments, and those skilled in the art can make various corresponding changes and deformations according to the present invention without departing from the spirit and essence of the present invention, but these corresponding Changes and deformations should belong to the scope of protection of the appended claims of the present invention.

Claims (6)

1. A wideband code division multiple access mobile communication system improves the method for system coverage, is used for improving the coverage of uplink and/or downlink, is characterized in that, comprises the following steps: (1) Setting the rate adjustment threshold of the mobile communication terminal service transmission power on the radio network controller side; (2) Acquire the service transmission power of the mobile communication terminal or obtain the reporting event at the radio network controller side, and the service transmission power includes uplink service transmission power and/or downlink service transmission power; (3) The radio network controller side adjusts the service rate of the mobile communication terminal according to the difference between the service transmission power of the mobile communication terminal and the rate adjustment threshold or the reported event, and the service rate includes an uplink service rate and/or downlink traffic rate, Wherein, the transmit power of the uplink service of the mobile communication terminal is reported by the mobile communication terminal to the radio network controller, and the mobile communication terminal, according to the relevant threshold value sent by the radio network controller side, when monitoring the event trigger , report the measurement report to the radio network controller side, The downlink service transmission power of the mobile communication terminal is reported by the Node B to the radio network controller, and the Node B reports a measurement report to the radio network controller when an event trigger is detected according to the relevant threshold value sent by the radio network controller . 2. The method for improving system coverage of a wideband code division multiple access mobile communication system according to claim 1, wherein: the rate adjustment threshold of said service transmit power comprises a rate-up start threshold, a rate-up termination threshold, and a rate-down termination Threshold and rate reduction start threshold, when the service transmission power is lower than the rate increase start threshold for a period of time, if the uplink load allows, increase the service rate of the mobile communication terminal, and the service transmission power is within a period of time When both are higher than the rate reduction start threshold, the service rate of the mobile communication terminal is reduced. 3. The method for improving system coverage of a broadband code division multiple access mobile communication system according to claim 2, characterized in that: the radio network controller side periodically obtains the service transmission power of the mobile communication terminal. 4. the method for improving system coverage of wideband code division multiple access mobile communication system according to claim 1, is characterized in that, also further comprises the step: setting a timer, in described radio network controller according to described reporting event After adjusting the service rate of the mobile communication terminal, start the timer. When the timer expires and the reported event is not received, it is judged whether the uplink state of the mobile communication terminal is not adjusted, and if so, the original state is not adjusted. Otherwise, it is judged whether the uplink status is a down-regulation state, if so, continue to down-regulate the uplink service rate, and start the timer, otherwise, if the uplink load of the cell is allowed to be adjusted up, then continue to uplink service rate up-regulation, and start the timer. 5. the method for improving system coverage of wideband code division multiple access mobile communication system according to claim 4, is characterized in that: described service transmission power is lower than described rate and then increases the termination threshold and then increases described mobile communication terminal service rate, If the service transmission power is higher than the rate reduction termination threshold, the service rate of the mobile communication terminal is reduced. 6. The method for improving system coverage of the wideband code division multiple access mobile communication system according to claim 3 or 5, characterized in that: the service rate of the mobile communication terminal after adjustment is less than or equal to the highest rate and greater than or equal to the minimum rate Or service guaranteed rate.

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