Transmission method for physical downlink control channel

A physical downlink control and control channel technology, applied in wireless communication, multi-frequency code systems, electrical components, etc., can solve the problems of limited number of UEs, limited control channel transmission capacity, affecting MU-MIMO and CoMP performance gains, etc. The effect of increasing capacity

Active Publication Date: 2013-02-13
POTEVIO INFORMATION TECH
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Problems solved by technology

In the prior art, the number of UEs that can be carried by CRS-based PDCCH is limited, which seriously affects the performance gain of MU-MIMO and CoMP
At the same time, in the heterogeneous scenario, the PDCCH demodulated based on CRS is strong

Method used

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  • Transmission method for physical downlink control channel
  • Transmission method for physical downlink control channel
  • Transmission method for physical downlink control channel

Examples

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Example Embodiment

[0021] The core idea of ​​the technical scheme of the present invention is to design a "control channel indication field" (CCIF) to indicate the control information of the UE. The CCIF contains a small amount of indication information. / 9 / 10 UE has the same number of CCEs to ensure backward compatibility; at the same time, the control channel indicator field is only placed in the UE-specific search space, which reduces the number of blind detections, reduces the complexity of the UE and saves energy consumption, and the physical downlink of the UE The content domain information of the control channel is carried on the original PDSCH, which significantly improves the capacity of the subframe to carry the PDCCH. The transmission strategy based on the demodulation reference signal DMRS (Demodulation Reference Signal) is used, that is, the D-PDCCH solution is introduced (through DM-based -RS demodulation PDCCH), compared with the PDCCH scheme based on CRS demodulation in Rel-8 / 9 / 10,...

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Abstract

The invention provides a transmission method for a physical downlink control channel (PDCCH). The transmission method comprises the following steps that: (A) a network side sets a control channel indicator field (CCIF) for indicating the control information of user equipment (UE), and bears the contents of the PDCCH on an orthogonal frequency division multiplexing symbol of a physical downlink shared channel (PDSCH); and (B) the UE decodes the CCIF, determines the modulation mode and position of the control information, and acquires the contents of the PDCCH from the PDSCH according to the position. According to the scheme, the PDCCH bearing capacity of a sub-frame can be remarkably improved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method for sending a physical downlink control channel. Background technique [0002] The channel structure of LTE Release 8 / 9 / 10 is as follows figure 1 shown. In LTE Release 8 / 9 / 10, the Physical Downlink Control Channel (PDCCH) occupies 1-3 Orthogonal Frequency Division Multiplexing (OFDM) symbols. 4 resource elements (REs) form a REG, wherein the Physical Control Format Indicator Channel (PCFICH) occupies 4 REGs, the Physical Hybrid Automatic Repeat Request Indicator Channel (PHICH) occupies 6-39 REGs, and each control channel element ( CCE) consists of 9 REGs, excluding the REs occupied by the cell-specific reference signal (CRS, Cell-specific Reference Signal) port and the REGs occupied by PCFICH and PHICH, the maximum number of CCEs provided for 10M bandwidth is 42(2Tx) / 37( 4Tx), some of these CCEs are reserved for purposes such as power control a...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04W72/12
Inventor 鲁智陈哲池连刚吴联海
Owner POTEVIO INFORMATION TECH
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