Selection method and device for transmission speed and modulation code in HSUPA

Abstract

The utility model relates to a selection method of transmission rate and modulation code and the device, which comprises the following steps: a lowest and a highest transmission block threshold mapping relation is established to get the spread factors used by each transmission block under a certain time slot number and the corresponding modulation code mode; a power relative value mapping relation is established, and the biggest and the smallest values of the transmission block supported by QPSK and 16QAM modulation modes are acquired according to the dispatching information to determine the transmission block range; the power thresholds needed by the smallest value and the biggest value of each transmission block are calculated; the power threshold value proximal to the power permitted value within the power threshold range is selected, and the lowest and the highest transmission block threshold mapping relation is searched to get the supported biggest transmission block; the data quantity waiting for transmission in current cache is checked to determine the selected transmission block; based on the finally selected transmission block, the transmission format combination is set up, and the emission power value corresponding to the finally selected transmission block is calculated. Based on the base station dispatching information and under the premise of ensuring transmission quality, the utility model selects the highest transmission rate as soon as possible to decide the modulation mode and coding rate.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and device for selecting transmission rate and modulation coding in HSUPA. Background technique [0002] In order to improve uplink access capability, Frequency Division Duplex (FDD: Frequency Division Duplex) and Time Division Duplex (TDD: Time Division Duplex) successively introduced Enhanced Uplink (Enhanced Uplink) technology in 3GPP Release6 and Release7. High Speed ​​Uplink Packet Access (HSUPA, High Speed ​​Uplink Package Access) is similar to High Speed ​​Downlink Packet Access (HSDPA, High Speed ​​Downlink Packet Access). The most important key technologies in the uplink enhancement technology include: NodeB fast scheduling, adaptive modulation and coding ( AMC, Adaptive Modulation and Coding), Hybrid Automatic Repeat Request (HARQ, Hybrid Automatic Repeat Request), etc. [0003] As an uplink enhancement technology, AMC needs to solve problems including: selecting an ...

AI Technical Summary

Problems solved by technology

[0019] 3) blocking

[0041] 1. Due to the slow change, it is not suitable for the AMC requirements of HSUPA

[0042] 2. Due to the small number of optional states, the method of judging whether TFC is supported based on historical power and transmission block information is not suitable for 64 rates

[0043] 3. In HSUPA, it is necessary to flexibly judge whether to support it according to the scheduling information, and the rate selection method for non-HSUPA services does not solve this problem

[0044] 4. HSUPA also needs to select the rate according to the scheduled physical resources, and select the appropriate modulation and coding rate from a variety of modulation and coding rate options. Non-HSUPA scheduling does not solve this problem

[0046] 1. The power and resources scheduled by HSUPA are changing rapidly, while HSDPA is basically unchanged, and its CQI indication method is not suitable for HSUPA

[0047] 2. It does not solve the problem of how to perform rate selection without CQI

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