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Uplink congestion control

A technology for link congestion and control methods, applied in network traffic/resource management, electrical components, wireless communication, etc., can solve problems such as increasing complexity of hardware, increasing block error rate, and not being able to use FCC schemes aggressively

Active Publication Date: 2014-07-09
ERICSSON (CHINA) COMMUNICATION COMPANY LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This increases complexity and requires higher capability hardware
[0013] Another disadvantage of FCC is that it will substantially increase the block error rate (BLER) of the target UE as FCC
This can especially cause problems for UEs with relatively high QoS requirements
At this point, the FCC scheme cannot be exploited aggressively, some load margin still needs to be preserved

Method used

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Examples

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Embodiment Construction

[0047] Hereinafter, embodiments of the present disclosure will be described based on the drawings. In the following description, some specific embodiments are for illustrative purposes only, and should not be construed as any limitation to the present disclosure, but as examples thereof. Descriptions of conventional structures or constructions will be omitted so as not to obscure the understanding of the present disclosure.

[0048] To alleviate the problems with the FCC approach (i.e., high demand for fast RoT measurements that may not be supported by current mainstream Node B hardware), proposed in U.S. Provisional Application No. 61 / 555,669, filed November 4, 2011 The Slow Congestion Control (SCC) scheme, the entire contents of which are incorporated herein by reference. In the SCC scheme, congestion control is based on radio frame-based RoT measurements (eg, a sampling rate of 10 ms). The basic idea is that when a newly received RoT measurement is above a configurable SC...

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Abstract

The present disclosure relates to an uplink congestion control scheme. In one embodiment, there provides an uplink congestion control method, comprising steps of: determining whether or not a congestion status of a serving cell is changed based on a rise over thermal, RoT, measurement; sending to a set of user equipment, UEs, a signaling to indicate the change of the congestion status; and performing an uplink congestion control based on the RoT measurement and with enhanced transmission format combination, E-TFC, reselection by at least one UE from the set of UEs based at least on the signaling.

Description

technical field [0001] The present disclosure relates to a wireless communication system, and more particularly, to an uplink congestion control scheme. Background technique [0002] In the uplink, the common radio resource shared by user terminals is the total amount of tolerable interference, which is defined as the average interference over all receive (Rx) antennas. A relative measure of total interference is lift over thermal (RoT), ie total interference relative to thermal noise. [0003] Uplink load control adjusts the load headroom of the cell to steer the measured RoT towards the target RoT. Typically, RoT measurements are available every radio frame (eg, 10 ms). The uplink scheduler allocates the available uplink (UL) load to the scheduled UEs that require higher bit rate, and reduces the granted uplink bit rate of some scheduled UEs when the system is overloaded . Large RoT oscillations (either above or below RoT target), and the RoT summit lasts long before ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/02H04W52/14H04W52/24
CPCH04W52/146H04W52/241H04W52/343H04W28/0236H04W28/0284H04W52/24
Inventor 张璋顾昕钰托尔比约恩·维格伦
Owner ERICSSON (CHINA) COMMUNICATION COMPANY LTD
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