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Out-ring power control method for upline enhancement special channel

An outer loop power control and power technology, applied in the direction of transmission control/equalization, radio/inductive link selection arrangement, selection device, etc., can solve the problems of narrowing SIRtarget differences, large SIRtarget differences, and differences, so as to reduce uplink interference Effect

Inactive Publication Date: 2006-02-15
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the different characteristics of E-DCH and DCH channels, for example: E-DCH and DCH may carry different services (for example: E-DCH carries packet services, DCH carries voice services), so the QoS is different; E-DCH has a physical layer Retransmission mechanism, but DCH does not; the encoding chain of E-DCH and DCH is different; the TTI of E-DCH and DCH can be different; the effect of macro diversity is different, these differences lead to the different SIRtarget required by E-DCH and DCH
[0011] The difference from Rel99 is that E-DCH and DCH cannot reduce the difference of SIR target through non-uniform rate matching, so the difference of SIR target may be relatively large
If the SIR target is set according to the reception quality and QoS requirements of one channel, the reception quality of the other channel may not meet the requirements
Or if the SIR target is set according to the service with a higher SIR target according to the principle of Rel99, it may cause another channel that requires a lower SIR target to transmit with unnecessary high power, thus causing greater uplink interference

Method used

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  • Out-ring power control method for upline enhancement special channel
  • Out-ring power control method for upline enhancement special channel
  • Out-ring power control method for upline enhancement special channel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Embodiment 1: Embodiment of an outer loop power control method for an uplink data channel in an E-DCH

[0085] Node B measures uplink reception quality and reports to RNC, including DCH uplink reception quality and E-DCH uplink reception quality, uplink reception quality includes DCH and E-DCH block error rate, that is, CRC check result, DCH and E-DCH transmission channel The bit error rate may also report the number of E-DCH data transmissions to the RNC.

[0086] The RNC sets the target signal-to-noise ratio (SIR target) of the outer loop power control according to the uplink reception quality of the DCH transmission channel, which is based on the uplink reception quality of the DCH transmission channel. When the DCH uplink reception quality is higher than the target value, the SIR target will be Decrease, when the DCH uplink reception quality is lower than the target value, the SIR target will be increased, and then the RNC will send the value of the SIR target to th...

Embodiment 2

[0115] Embodiment 2: Outer Loop Power Control Method of Uplink Control Channel in E-DCH Embodiment RNC sets the initial value of E-DPCCH / DPCCH power offset and transmits it to UE and Node B. The RNC reconfigures the power offset of the E-DPCCH / DPCCH.

[0116] The RNC resets the power offset of the E-DPCCH / DPCCH according to the change of the power offset of the E-DPDCH / DPCCH. When the additional E-DPDCH / DPCCH power offset increases, the E-DPCCH / DPCCH power offset also increases; when the additional E-DPDCH / DPCCH power offset decreases, the E-DPCCH / DPCCH power offset remains remain unchanged or decrease. In order to ensure the quality of the E-DPCCH, the speed at which the power offset of the E-DPCCH / DPCCH decreases is lower than the speed at which it increases. This method is relatively simple to adjust the power offset of the E-DPCCH / DPCCH, and does not require the Node B to estimate and report the quality of the E-DPCCH.

[0117] In order to enable the RNC to accurately s...

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Abstract

The operation method for upward exterior ring power control in E-DCH comprises steps: using Node B to detect upward receiving quality and report to RNC; the RNC arranges the target signal-noise rate for exterior ring power control according to received quality and sends the said rate to Node B, arranges an added E-DPDCH / DPCCH power off-set value according to QoS and upward received quality of E-DCH and DCH and sends the said off-set value to UE; the RNC determines the emission power for upward E-DPDCH and sends E-DCH data according to power off-set in Rel99 and added power off-set value. This invention can compensate the difference between E-DCH and SIR target of DCH, decreases upward disturbance, and makes RNC control the physical layer transmission number for E-DCH data.

Description

technical field [0001] The present invention relates to the third generation of mobile communication, in particular to an uplink outer loop power control method in E-DCH. Background technique [0002] The second generation mobile communication system includes GSM (Global System for Mobile Communications) and IS (Interim Standard)-95, the main goal is to provide voice services. GSM adopts TDMA technology and was commercialized in 1992, mainly used in Europe and China. What IS-95 uses is code division multiple access technology, mainly used in the United States and South Korea. [0003] At present, mobile communication technology has evolved into the third generation mobile communication system, which provides high-speed and high-quality data services and multimedia services in addition to voice services. The third-generation mobile communication system includes the asynchronous CDMA system (or WCDMA system, or UMTS) studied by the 3GPP International Organization for Standar...

Claims

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Application Information

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IPC IPC(8): H04B7/005H04Q7/38
Inventor 王婷李小强张玉建杜高科李周镐
Owner BEIJING SAMSUNG TELECOM R&D CENT
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