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Method for indicating modulation mode of high speed descending grouping access

A technology of modulation mode and high-speed shared control, which is applied in the direction of digital transmission system, data exchange network, and error prevention. It can solve the problems of compatibility, failure to express 64QAM, etc., and achieve the effect of functional support.

Inactive Publication Date: 2009-07-01
ZTE CORP
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Problems solved by technology

[0016] With the advancement of technology, it is possible to use 64QAM in HSDPA, but because the modulation information can only be represented by one 1bit, only two modulation modes can be represented, which makes it impossible to represent 64QAM according to the current structure
If the HS-SCCH frame structure is changed, it will cause compatibility problems

Method used

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  • Method for indicating modulation mode of high speed descending grouping access

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Embodiment Construction

[0034] The technical solutions of the present invention will be further described below in combination with specific embodiments and accompanying drawings.

[0035] It can be seen from the background technology that HSDPA is a high-speed downlink packet service, and the network side configures the modulation mode, physical time slot, code channel resource and transport block size information used by the UE through the HS-SCCH. When the modulation mode is determined, the configured physical time slot and code channel resources can determine the actual carrying capacity of the physical layer of the air interface; according to the configured transmission block size, the allowed puncturing limit and coding method are used to calculate the transmission block size. Physical load requirements. The actual physical layer bearer capacity must meet the physical bearer requirements of the transport block.

[0036] In the TD-SCDMA system, the process of indicating the modulation mode thro...

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Abstract

The invention discloses a method for instructing a modulation mode in a high speed downlink packet access (HSDPA). The method comprises the following steps: a wireless network controller receives a capacity message reported from a terminal and transmits the capacity message to a NodeB; and the NodeB determines the size, the modulation mode and the code channel resource of a transmission block to be instructed according to capacity restriction conditions and the capacity message, and, if judging that the terminal support a 64QAM (quadrature amplitude modulation) modulation mode, determines a modulation mode message according to the following way and transmits to the terminal: if the determined modulation mode is 64QAM or QPSK (quadrature phase shift keying), setting the modulation mode message of a share control channel for high speed downlink shared channel (HS-DSCH) (HS-SCCH) to be zero, and if the determined modulation mode is 64QAM, setting the modulation mode message of the HS-SCCH to be 1. The method needs not to change the available variable HS-SCCH frame structure, and can be compatible to user equipment (UE) supporting higher-order modulation scheme like 64QAM or not.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a method for indicating a 64QAM (Quadrature Amplitude Modulation) modulation mode through a high-speed shared control channel HS-SCCH in a Time Division Synchronous Code Division Multiple Access (TD-SCDMA) system. Background technique [0002] An important feature of the third-generation mobile communication system is the unbalanced traffic volume of the uplink and downlink, and the traffic volume of the downlink will generally be greater than that of the uplink. In response to this demand feature, 3GPP (3rd Generation Partnership Project, 3rd Generation Partnership Project) introduced a High Speed ​​Downlink Packet Access (HSDPA: High Speed ​​Downlink Packet Access) feature in the 3G specification. In the HSDPA feature, by introducing Adaptive Modulation and Coding (AMC: Adaptive Modulation and Coding), Hybrid Automatic Retransmission Request (HARQ: Hybrid Automatic Retransmi...

Claims

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Application Information

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IPC IPC(8): H04L27/34H04L1/00H04L12/56
Inventor 赵静黄河陈冠马志锋严太玉
Owner ZTE CORP
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