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Method and apparatus for selecting CCE (control channel element) optional locations under PDCCH (physical downlink control channels) aggregation levels

An aggregation level, downlink technology, applied in digital transmission systems, electrical components, transmission systems, etc., can solve the problems of CCE candidate location conflict, inability to plan avoidance, and small CCE numbers, achieve optimal resource utilization, and reduce CCE candidates. Position conflict probability, excellent effect

Active Publication Date: 2018-01-23
POTEVIO INFORMATION TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once the public information is allocated, when it is the user's turn to schedule, because the number of CCEs is small and the space is limited, it is easy for CCE candidate positions to conflict, resulting in failure to schedule
Based on the above analysis, the location of CCEs will be randomly distributed in the entire available CCEs based on the randomization factors in the formula, and it is impossible to plan and avoid them when CCEs are allocated.

Method used

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  • Method and apparatus for selecting CCE (control channel element) optional locations under PDCCH (physical downlink control channels) aggregation levels
  • Method and apparatus for selecting CCE (control channel element) optional locations under PDCCH (physical downlink control channels) aggregation levels
  • Method and apparatus for selecting CCE (control channel element) optional locations under PDCCH (physical downlink control channels) aggregation levels

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Embodiment Construction

[0034] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0035] In general, an embodiment of the present invention provides a method for selecting CCE candidate positions under the PDCCH aggregation level, the method includes: Step 1, calculating the total number of CCEs in each downlink subframe under the current subframe configuration; Step 2, for all The C_RNTI value is traversed and calculated to obtain the first CCE position of all available PDCCH authorizations in each downlink subframe under the set subframe ratio; step 4, filter out the C-RNTI that meets the conditions according to the set principle, and determine that the constraints are different The range of CCE candidate positions at the aggregation level. Preferabl...

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Abstract

The present invention provides a method and apparatus for selecting CCE (control channel element) optional locations under PDCCH (physical downlink control channels) aggregation levels. The method includes the following steps that: the total number of CCEs of downlink subframes under a current subframe ratio is calculated; traversal calculation is performed on all C_RNTI values, a first CCE location which is authorized by all available PDCCHs in the downlink subframes under a set subframe ratio is obtained according to the total number of the CCEs of the downlink subframes under the current subframe ratio; and C_RNTI values which satisfy conditions are screened out according to set principles, and a range that can limit the CCE (control channel element) optional locations under different PDCCH aggregation levels can be determined. According to the method of the invention, the range that can limit the CCE (control channel element) optional locations under different PDCCH aggregation levels can be determined, so that CCEs that may be occupied by public information can be avoided, and therefore, the conflict probability of CCE optional locations can be decreased, and the resource utilization rate of a system can be improved.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, and more specifically, to a method and device for selecting CCE candidate positions under PDCCH aggregation level. Background technique [0002] In the LTE wireless mobile communication system, the Physical Downlink Control Channel (PDCCH) is used to carry the downlink control information (Downlink Control Information, DCI), which is shared by uplink and downlink scheduling. The DCI information mainly includes scheduling allocation information and other control information. . The user equipment (User Equipment, UE) obtains the required DCI information through blind detection, and after correctly receiving the PDCCH information, the UE decodes the physical downlink shared channel (PDSCH) information to obtain an uplink authorization. The correctness of PDCCH decoding determines the transmission rate. [0003] The number of available Orthogonal Frequency Division Multiplexing...

Claims

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Application Information

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IPC IPC(8): H04W72/04H04L5/00
Inventor 朱雅琼
Owner POTEVIO INFORMATION TECH
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