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Method for self-adaptive adjustment on symbol occupation amount of PDCCH (Physical Downlink Control Channel)

A technology of self-adaptive adjustment and number of symbols, applied in electrical components, wireless communication, etc., can solve problems such as decreased service satisfaction of cells, limited system capacity, and inability to adapt to dynamic changes in system load and service characteristics.

Inactive Publication Date: 2013-04-03
POTEVIO INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, PDCCH and PDSCH time-domain resource control is realized by statically configuring PCFICH values. Due to the uncertainty of the number of system users, the number of services, and the characteristics of service data transmission, this simple and extensive resource division method cannot adapt to the load of the system. and dynamic changes in service characteristics, resulting in limited system capacity or decreased service satisfaction in the community

Method used

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  • Method for self-adaptive adjustment on symbol occupation amount of PDCCH (Physical Downlink Control Channel)
  • Method for self-adaptive adjustment on symbol occupation amount of PDCCH (Physical Downlink Control Channel)
  • Method for self-adaptive adjustment on symbol occupation amount of PDCCH (Physical Downlink Control Channel)

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specific Embodiment approach

[0051] Step 201-1, judging whether the detection period timer is overtime, if so, execute step 201-2, otherwise continue to execute step 201-1;

[0052] Step 201-2. Calculate the satisfaction Sat(i, t) of the service i in the cell to the service provided by the network in the current subframe t, and the value range is [0-1];

[0053] Step 201-3, judging whether i is equal to the current total business number N of the system services , if so, execute step 201-4, otherwise, set i=i+1, and return to step 201-2;

[0054] Step 201-4, calculate the satisfaction degree of the cell service according to the formula (1), wherein, N TTI is the duration of the detection cycle timer measured in the number of subframes.

[0055] Sat(i, t) of service i in subframe t can be defined in many ways, and two examples are given below:

[0056] For GBR services, the satisfaction Sat(i, t) of service i in subframe t is obtained by the ratio of the actual transmission rate of the service to the app...

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Abstract

The invention provides a method for self-adaptive adjustment on symbol occupation amount of a PDCCH (Physical Downlink Control Channel). The method comprises the following steps of: A, periodically detecting the degree of satisfaction to cell service within a period of time; B, judging whether the degree of satisfaction to the cell service is lower than a first threshold, and if so, executing a step C, otherwise, returning back to execute the step A; C, calculating the occupation rate of cell bandwidth resources, judging whether the occupation rate of the cell bandwidth resources is lower than a second threshold, and if so, executing a step D, otherwise, executing a step E; D, increasing the symbol occupation amount of the PDCCH, and returning back to the step A; E, acquiring the quantity of current system users, and judging whether the user quantity is lower than a third threshold, and if so, executing a step F, otherwise, returning back to the step A; and F, reducing the symbol occupation amount of the PDCCH, and returning back to the step A.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for adaptively adjusting the number of symbols occupied by a physical downlink control channel (PDCCH). Background technique [0002] When the UE transmits data services, it needs to blindly detect the downlink control information (DCI, Downlink Control Information) of the physical downlink control channel (PDCCH) in the public and dedicated search spaces through the Hashing algorithm to obtain the physical resources required for uplink and downlink data transmission. The blind detection process first needs to use the PDCCH occupied symbol resources indicated by the Physical Control Format Indicator Channel (PCFICH) channel and the resources occupied by PCFICH and Physical Hybrid ARQ Indicator Channel (PHICH, Physical Hybrid ARQ Indicator Channel) to calculate the control channel element (CCE) The size of the space and the starting position of the blind de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04W72/08H04W72/54
Inventor 张书园
Owner POTEVIO INFORMATION TECH CO LTD
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