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Adaptive modulation coding method and adaptive modulation coding system

A technology of adaptive coding and modulation method, which is applied in the field of AMC method and system, can solve the problems of HS-DSCH transmission pause, resumption, no solution, no scheduling, etc., and achieve the effect of improving link adaptive performance

Active Publication Date: 2009-10-28
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

[0009] However, in the enhanced CELL-FACH state of the TDD system, most of the data arrives at intervals, and the HS-DSCH transmission often stops and then resumes. If the data arrival time interval is long, the base station does not schedule the UE for a period of time. Therefore, the new requirement is to improve the AMC mechanism of HS-DSCH, so that the UE can update and feed back the channel quality measurement results to the base station in time, so that Improved link adaptation performance for HS-DSCH transmission
However, there is currently no effective solution for the above new requirements

Method used

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  • Adaptive modulation coding method and adaptive modulation coding system

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Embodiment Construction

[0036] The core idea of ​​the present invention is: the base station at the network side selects the AMC of the HS-DSCH according to the last updated and fed back channel quality measurement result.

[0037] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail by citing the following embodiments and referring to the accompanying drawings.

[0038] Such as figure 1 Shown, a kind of adaptive coding modulation method, this method comprises the following steps:

[0039] Step 101, the UE feeds back the updated channel quality measurement result to the network side.

[0040] Here, step 101 is further: setting a timer on the UE side, and when the timer expires, the UE feeds back the updated channel quality measurement result to the network side on the non-HS-SICH feedback channel in the uplink transmission initiated for the first time ; and whenever the UE feeds back an updated cha...

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Abstract

The invention discloses an adaptive modulation coding method, which comprises the following steps that: user equipment (UE) feeds updated channel quality measuring results back to a network side; and a base station performs adaptive modulation coding (AMC) selection of a high speed downlink shared channel (HS-DSCH) according to a received latest updated and feedback channel quality measuring result. The invention also discloses an adaptive modulation coding system, which comprises a feedback unit, a receiving unit and a selection unit, wherein the selection unit is used for performing AMC selection of the HS-DSCH by the base station according to the received latest updated and feedback channel quality measuring result. By the method and the system, the base station performs AMC selection of the HS-DSCH according to the latest updated channel quality measuring result which is fed back by the UE, and improves the adaptive performance of links for the HS-DSCH transmission.

Description

technical field [0001] The present invention relates to Adaptive Coding and Modulation (AMC) technology, in particular to an AMC method and system for a Time Division Duplex (TDD) system in an enhanced CELL-FACH state. Background technique [0002] The so-called CELL-FACH state refers to the state of continuously monitoring the Forward Access Channel (FACH) Radio Resource Control (RRC). At present, for the data transmission mechanism of the FDD system in the enhanced CELL-FACH state, the Frequency Division Duplex (FDD) system can increase the CELL-FACH state by introducing the High Speed ​​Downlink Packet Access (HSDPA) operation in the CELL-FACH state. The lower peak rate, and effectively reduce the signaling delay, improve the user's business service quality. Moreover, no matter the user equipment (UE) adopts public or dedicated HSDPA terminal identification code H-RNTI, the base station adopts a fast and repeated transmission mode for data transmission. That is, the cha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04L1/00
Inventor 刘亚伟高卓
Owner DATANG MOBILE COMM EQUIP CO LTD