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Method, system and device for allocating and identifying physical downlink control channel (PDCCH)

A technology of equipment and user equipment, applied in the direction of electrical components, wireless communication, etc.

Active Publication Date: 2011-11-02
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the current scheme, there is no scheme for allocating PDCCH resources under the enhanced PDCCH

Method used

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  • Method, system and device for allocating and identifying physical downlink control channel (PDCCH)
  • Method, system and device for allocating and identifying physical downlink control channel (PDCCH)
  • Method, system and device for allocating and identifying physical downlink control channel (PDCCH)

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0114] Example 1. At the sending end, if the transmission mode of the user equipment is to perform channel measurement and signal demodulation based on CRS, the sending end allocates the CSS and UESS corresponding to the user equipment in the Legacy PDCCH domain; otherwise, the sending end allocates the CSS and UESS corresponding to the user equipment The corresponding CSS is allocated in the Legacy PDCCH domain, and the UESS is allocated in the Enhanced PDCCH domain, or the CSS and UESS of such users are allocated according to other rules. For example, in the LTE-A system, the transmission mode of the user equipment is one of modes 1 to 6 (modes 1 to 6 are based on CRS measurement and demodulation, see Table 1), and the CSS and UESS corresponding to the user are allocated in Legacy PDCCH field.

example 2

[0115] Example 2. At the sending end, if the transmission mode of the user equipment is CRS-based channel measurement, the sending end allocates the CSS and UESS corresponding to the user equipment in the Legacy PDCCH domain, otherwise the sending end allocates the CSS corresponding to the user equipment In the Legacy PDCCH domain, the UESS is allocated in the Enhanced PDCCH domain, or the CSS and UESS of this type of user are allocated according to other rules. For example, in the LTE-A system, the transmission mode of the user equipment is one of modes 1 to 8 (modes 1 to 8 are based on CRS measurement, see Table 1), then the CSS and UESS corresponding to the user equipment are allocated on the Legacy PDCCH area.

Embodiment 3

[0116] Embodiment 3: At the sending end, if the transmission mode of the user equipment is based on CRS for channel measurement and demodulation based on UE-RS port 5 or CRS, then the sending end allocates the CSS and UESS corresponding to the user equipment in the Legacy In the PDCCH domain, otherwise, the transmitting end allocates the CSS corresponding to the user equipment in the Legacy PDCCH domain, and allocates the UESS in the Enhanced PDCCH domain, or realizes the allocation of CSS and UESS of such users according to other rules. For example, in the LTE-A system, the transmission modes of the user equipment are modes 1 to 7 (modes 1 to 7 are based on CRS for channel measurement and demodulation based on UE-RS port 5 or CRS, see Table 1) one, the CSS and UESS corresponding to the user equipment are allocated in the Legacy PDCCH domain.

[0117] It should be noted that the above specific mode numbers are illustrated by taking Table 1 as an example. If there is any change...

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PUM

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Abstract

The embodiment of the invention provides a method, system and device for allocating and identifying physical downlink control channel (PDCCH), belonging to the technical field of wireless communication. The invention is used for allocating PDCCH resource according to a PDCCH enhanced scheme. The method comprises the following steps: a physical downlink shared channel (PDSCH) transmission mode is notified to user equipment (UE) by the network side; and corresponding PDCCH resource is allocated to the UE by the network side based on the PDSCH transmission mode corresponding to the UE, wherein the PDCCH resource includes a Legacy PDCCH domain and an Enhanced PDCCH domain. According to the invention, the PDCCH resource can be allocated according to the PDCCH enhanced scheme, so as to send and receive the PDCCH effectively.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method, system and equipment for allocating and determining PDCCH. Background technique [0002] In the LTE (Long Term Evolution; long-term evolution) system, PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel) is sent in each radio subframe, and is connected with PDSCH (Physical Downlink Shared Channel, Physical Downlink shared channel) to form a TDM (Time Division Multiple, Time Division Multiplexing) relationship. The PDCCH is sent through the first N OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) symbols of a downlink subframe. [0003] The control region for transmitting the PDCCH in the LTE system is composed of logically divided CCEs (Control Channel Elements, control channel elements). The transmission of DCI (Downlink Control Information, downlink control information) is al...

Claims

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Application Information

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IPC IPC(8): H04W72/04
CPCH04W72/04
Inventor 张然然苏昕沈祖康赵锐潘学明丁昱
Owner DATANG MOBILE COMM EQUIP CO LTD
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