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Uplink control method for reducing error rate of TD-HSUPA (Time Division-High Speed Uplink Packet Access)

A control method and bit error rate technology, applied in the field of third-generation mobile communications, can solve problems such as the impact of terminal rate, achieve reasonable power control, improve and stabilize the rate, and reduce the number of attempts to send

Active Publication Date: 2012-06-13
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these two methods are completely dependent on the network. Once the network end is abnormal or the TPC adjustment and authorization adjustment of the network are not carried out in time, the terminal rate will be seriously affected.
It can be seen that there are defects in the way of completely relying on the adjustment of the network to resist the high bit error rate of the terminal, achieve stability and increase the speed

Method used

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  • Uplink control method for reducing error rate of TD-HSUPA (Time Division-High Speed Uplink Packet Access)
  • Uplink control method for reducing error rate of TD-HSUPA (Time Division-High Speed Uplink Packet Access)
  • Uplink control method for reducing error rate of TD-HSUPA (Time Division-High Speed Uplink Packet Access)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0056] 101. Set the E-PUCH block error sliding window statistical window length T;

[0057] The window length is based on the number of scheduling times. The terminal starts to count the feedback information received from the network on the hybrid automatic repeat request (referred to as HARQ) acknowledgment indication channel (referred to as E-HICH) of the E-DCH transmission channel. HICH, the window length counter W is increased by 1, and when W increases to the window length T, it starts to slide.

[0058] Among them, T is the project realization experience value, the value range is [6, 640], and the preferred value is 64.

[0059] 102 count the bit error rate Er of the E-PUCH in the sliding window of the error block;

[0060] Through the acknowledgment (ACK for short) or non-acknowledgment (NACK for short) information fed back by the network on the hybrid automatic repeat request (HARQ for short) acknowledgment indicator channel (E-HICH for short), each time the terminal ...

Embodiment approach 2

[0075] 201-202. Consistent with 101 and 102;,

[0076] 203. The bit error threshold th1 and th2 used in 103 can be combined into one, called th3,

[0077] 203-1 When Er<=th3, the terminal considers that the bit error rate is acceptable at this time, and does not interfere. The power control of the E-PUCH channel is completely controlled by the TPC of the network, and responds to the TPC of the network in a timely manner.

[0078] 203-2 When Er>th3, the terminal judges whether the network increases the transmission power of the E-PUCH physical channel through TPC, and if so, responds; The step size upStep increases the transmission power on its own initiative, and increases the probability of successful transmission by increasing the transmission power of the terminal.

[0079] Among them, the value range of th3 is [5%, 100%], preferably 10% or 20%;

[0080] In this simplified implementation mode, because the judgment range of the bit error threshold is reduced, the implement...

Embodiment approach 3

[0083]If the bit error rate remains above the preset threshold after the transmission power adjustment in Embodiment 1 or Embodiment 2 above, the network has adjusted the transmission power of the E-PUCH physical channel to the maximum, or if the network has not adjusted, And the terminal increases the transmission power of the E-PUCH physical channel by itself through the method used in the first major step, and also makes it reach the maximum transmission power, then this implementation mode can be enabled; for the specific process, see image 3 .

[0084] 301. Define variable β max

[0085] 302. Judgment beta max Update condition, whether P E-PUCH >=Maximum transmission power Pmax, and the bit error rate Er>th4 on the E-PUCH channel that the terminal counts, if so, go to 303, otherwise go to 309;

[0086] Among them, the value range of th4 is [5%, 90%];

[0087] 303. Update beta max , and increase P with step size upStep e-base The value of is used to calculate the E...

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Abstract

The invention relates to the technical field of third generation mobile telecommunication, in particular to an uplink control method for reducing an error rate of a TD-HSUPA (Time Division-High Speed Uplink Packet Access) terminal of an enhanced technology high speed uplink packet access system of TD-SCDMA (Time Division-Synchronous Code Division Multiple Access). The method comprises the following steps of controlling the power of the terminal by using different E-PUCH (Enhanced-Uplink Physical Channel) power control strategies according to a threshold range of an E-PUCH error rate Er counted within an E-PUCH error block sliding window; and transmitting data on the E-PUCH by using the adjusted transmission power. The power of the terminal is more reasonably controlled and the error rate is largely reduced to achieve the purpose of increasing and stabilizing the speed; moreover, the size of the selected transmission block is limited through a special E-TFC (Enhanced-Transmission Channel Format Combination) selecting process; and a small data block is tried to be transmitted on the EPUCH so that the transmission time number of a big data block analyzed in a wrong way is reduced andthe error rate is also reduced.

Description

technical field [0001] The present invention relates to the technical field of the third generation mobile communication, in particular to an enhanced technology for reducing the bit error rate of the terminal of the Time Division Synchronous Code Division Multiple Access System (TD-SCDMA for short) High Speed ​​Uplink Packet Access System (TD-HSUPA for short) uplink control method. Background technique [0002] In the TD-HSUPA system, the network controls and manages all wireless resources in the cell. The network will determine the grant size for the terminal according to the scheduling information (SI for short) reported by the terminal, and at the same time, power the terminal according to the bit error rate. Control, the terminal completes the process of selecting the transmission format according to the authorization of the network, and at the same time uses the transmission power adjusted by the network to transmit data on the enhanced uplink physical channel (E-PUCH ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/14H04W52/24
Inventor 李进朴虎哲谭舒戴葵
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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