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Method for controlling speed rate of reverse link based on channel quality

A reverse link and rate control technology, applied in wireless communication, network traffic/resource management, electrical components, etc., can solve problems such as low system efficiency and unreasonable allocation of channel resources, achieve high system throughput and improve resources Effect of Utilization, Small System Load

Active Publication Date: 2012-12-19
THE PLA INFORMATION ENG UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies in the prior art, the present invention proposes a reverse link rate control method based on channel quality, which solves the problem of unreasonable channel resource allocation and low system efficiency of the rate control algorithm under the cdma2000 1x EV-DO reverse link T2P mechanism question

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  • Method for controlling speed rate of reverse link based on channel quality
  • Method for controlling speed rate of reverse link based on channel quality

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Experimental program
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Effect test

Embodiment 1

[0046] Embodiment one: see figure 1 , figure 2 . The system network structure of the application of the reverse link rate control method based on channel quality in the present invention is as follows: figure 1 As shown, the system is mainly composed of an access terminal 102 , a radio access network 104 , a packet core network 106 and an IP network 108 . The access terminal is a device that provides data connection for users; the wireless access network provides the wireless bearer between the packet core network and the access terminal, and transmits user data and non-access level signaling messages, and the access terminal passes these signaling Messages interact with the packet core network for service information; the packet core network is mainly used to provide access terminals to access the IP network.

[0047] The reverse link rate control method based on the channel quality of the present invention is mainly used for controlling the rate of the cdma2000 1x EV-DO ...

Embodiment 2

[0054] Embodiment two: see figure 1 , figure 2 . The reverse link rate control method based on channel quality in this embodiment is different from Embodiment 1 in that step C specifically includes the following steps:

[0055] C1. The terminal counts the average value of its own transmission pilot power in 4 time slots;

[0056] C2. The terminal compares the statistical mean value with the pilot threshold, and takes the difference;

[0057] C3. Assign a weighting factor m to the difference;

[0058] C4. Sum the result of step C3 and the FRAB calculated by the RTCMAC subtype 3 rate control algorithm to jointly generate a new long-term system load reference mFRAB; when the sum of the result of step C3 and the FRAB calculated by the RTCMAC subtype 3 rate control algorithm is less than When -1, the value is -1; when the sum of the result of step C3 and the FRAB calculated by the RTCMAC subtype 3 rate control algorithm is greater than 1, the value is 1;

[0059] C5. Replace ...

Embodiment 3

[0061] Embodiment three: see figure 1 , figure 2 . The reverse link rate control method based on channel quality in this embodiment is slightly different from Embodiment 2, and specifically includes the following steps:

[0062] 1. Preset the system load threshold and the value of the weighting factor m;

[0063] 2. Measure the pilot energy and noise power spectral density of each chip at all antennas of the sector, and measure once for each time slot. Combining the data channel gains corresponding to different rate levels, calculate the corresponding reverse link load factor value at each antenna, and take the maximum value as the final reverse link load factor value;

[0064] 3. Comparing the reverse link load factor with the load threshold to obtain the RAB value;

[0065] 4. Take the RAB statistics of 4 time slots to generate QRAB, and take the RAB statistics of 384 time slots to generate FRAB;

[0066] 5. The terminal counts the average value of its own transmission...

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Abstract

The invention relates to a method for controlling the speed rate of a reverse link based on the channel quality. In a system comprising an access terminal, a wireless access network, a grouped core network and an IP (Internet Protocol) network, the activated access terminal is graded according to the pilot power and the method for weighting factors is introduced to flexibly adjust the allocation of T2P streams. The method comprises the following steps of: (1) presetting a threshold value of a system load and calculating a load factor of the reverse link; (2) comparing the calculated load factor of the reverse link with the threshold value of the load to obtain an RAB (Radio Access Bearer) value; (3) adjusting the resource allocation of the T2P by the access terminal according to the current RAB value and the quality condition of the reverse channel of the access terminal; and (4) adjusting the transmission speed by the access terminal according to the allocated T2P resources and a mapping table of the data speed rate. The invention has higher system throughout, lower terminal transmission power and smaller system load, improves the utilization rate of the resources and simultaneously avoids the instability of the system because the terminal with poorer channel quality improves the transmission power.

Description

technical field [0001] The invention relates to a reverse link rate control method based on channel quality, which is suitable for the third generation mobile communication technology cdma2000 1x EV-DO (Evolution-Data Optimized, standard-data optimized) reverse link rate control. Background technique [0002] cdma2000 is one of the three mainstream technologies of 3G. With the rapid development of Internet and information technology, people's demand for wireless data services is increasing day by day, and data services are developing rapidly in the direction of diversity, large capacity and asymmetry. The data business capabilities of the company are very limited and cannot meet future business needs. cdma2000 1x EV-DO mainly completes the high-speed data transmission function of the cdma2000 1x system, and can solve the problem of wireless transmission of high-speed asymmetric packet data services. 1x EV-DO is an extension of cdma2000 in the direction of data functions. Its...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/22H04W72/08
CPCY02B60/50
Inventor 柴远波刘冰洋戚建平张伟谷立鹏傅敏张鑫解思瑞刘亮亮
Owner THE PLA INFORMATION ENG UNIV
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