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Uplink resource scheduling method

A scheduling method and link resource technology, applied in the field of uplink resource scheduling, can solve problems such as terminal uplink interference, high uplink transmission power, and poor transmission quality

Inactive Publication Date: 2014-09-24
BEIJING XINWEI TELECOM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the inventor found at least the following problems in the above-mentioned prior art: if the link quality of the uplink of the terminal is degraded due to sudden interference, the base station finds that the received signal-to-noise ratio of the uplink does not satisfy the modulation of the uplink configuration The signal-to-noise ratio threshold required by the encoding method will send a power control command to the uplink of the terminal to request the terminal to increase the transmit power in the uplink. However, if the interference is large, even if the terminal transmits to the maximum transmit power, it will not be able to make the base station The received signal-to-noise ratio on the side meets the SNR threshold required by the modulation and coding method configured on the uplink. At this time, the service requirements of the terminal remain unchanged and bandwidth reconfiguration will not be initiated. If the service requirements change, the terminal initiates bandwidth reconfiguration. The bandwidth reconfiguration request cannot be correctly received by the base station when the uplink is greatly disturbed, so the terminal can only continue to work with the current uplink resource configuration. High transmit power, causing uplink interference to adjacent terminals

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0015] In this embodiment, the base station estimates the uplink transmission power of the terminal, and when it is judged that the uplink transmission power of the terminal is greater than or equal to the transmission power threshold, triggers the uplink reconfiguration of the terminal, by reducing the subchannel occupied by the terminal or reducing the modulation mode of the subchannel occupied by the terminal , to reduce the uplink transmit power of the terminal. Specific steps are as follows:

[0016] Step 1, the base station estimates the uplink transmit power of the terminal.

[0017] Taking the McWiLL system as an example, the uplink power control of the terminal is performed on the base station side. The base station will perform power control calculations on the uplink transmission power of the terminal in each wireless frame, and send a power control command through the downlink to allow the terminal to adjust the uplink transmission power. , in order to make the up...

Embodiment 2

[0027] In wireless communication, due to self-interference caused by multipath, imprecise signal detection, and receiver / transmitter nonlinearity, increasing power does not necessarily improve received signal quality, on the contrary, it may increase the overall interference level of the network and reduce system throughput. In another preferred embodiment of the invention, a quantity called saturated signal power is estimated to reflect reception conditions under which an increase in received signal power does not translate into an increase in received signal quality, eg SINR or SNR.

[0028] At this time, the base station estimates the uplink transmission power of the terminal, and when it is judged that the uplink transmission power of the terminal is greater than or equal to the saturated signal power, triggers the uplink reconfiguration of the terminal, and reduces the subchannel occupied by the terminal or the modulation mode of the subchannel occupied by the terminal. R...

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Abstract

The invention proposes an uplink resource scheduling method which includes the following steps: a base station estimates an uplink transmission power of a terminal; and when the uplink transmission power of the terminal is larger than or equal to a maximum value of a transmittable power of the terminal, uplink bandwidth reallocation is carried out through triggering of the terminal so that the uplink transmission power of the terminal is reduced. Through adoption of the method, when the terminal is subjected to sudden uplink interferences and incapable of ensuring effective signaling interaction with the base station, the base station is capable of effectively preventing saturation of the uplink transmission power of the terminal so that the uplink transmission quality of the terminal is ensured as far as possible and interference of uplinks of adjacent terminals is prevented.

Description

technical field [0001] The present invention relates to the field of mobile communication, in particular to an uplink resource scheduling method. Background technique [0002] In the current mobile communication field, resource scheduling in a mobile communication system (such as a McWiLL system) usually includes bandwidth reconfiguration and power control. The uplink is established by the terminal due to service requirements. Therefore, the terminal usually triggers the bandwidth reconfiguration of the uplink in real time according to the service requirements, and the base station performs resource reconfiguration for it according to the available resources of the system. The terminal can be configured The occupied sub-channels and the modulation and coding methods used to meet the uplink service requirements of the terminal; to ensure that the transmit power of the uplink of the terminal can adapt to changes in channel conditions, so that the terminal can use the occupied ...

Claims

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Application Information

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IPC IPC(8): H04W72/12
CPCY02D30/70
Inventor 黄其华曹伟义余西西李倩
Owner BEIJING XINWEI TELECOM TECH