Method and device for transmitting control information

Abstract

The invention discloses a control information transmission method and device. The control information transmission method comprises the steps of respectively conducting preprocessing on first control information transmitted through each PDCCH, respectively conducting scrambling and modulating processing on the first control information after preprocessing is carried out to obtain second control information corresponding to each PDCCH, conducting PDCCH multiplex processing on the second control information, enabling invalid information to be inserted according to a preset rule in the multiplex process, obtaining a continuous information stream, and transmitting the continuous information stream. By means of the technical scheme, the operation complexity can be reduced, and the processing resources of a system can be better saved.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a method and device for transmitting control information. Background technique [0002] The Long Term Evolution (LTE, Long Term Evolution) mobile communication system is the long-term evolution (Long Term Evolution, LTE) of the Universal Mobile Telecommunications System (UMTS) technology by the 3rd Generation Partnership Project (3Gpp). In the LTE system, downlink control information mainly includes scheduling information for downlink data transmission, Hybrid Automatic Repeat reQuest (HARQ, Hybrid Automatic Repeat reQuest) response information for uplink data transmission, and control information such as uplink scheduling assignment. These control information correspond to The control signaling is generated by the physical layer or the MAC layer, and is generally also referred to as "layer 1 / layer 2 control signaling". The Physical Downlink Control Channel (PDC...

AI Technical Summary

Problems solved by technology

[0013] The first defect: when the control information is multiplexed by PDCCH to form a continuous information flow, some invalid information will be inserted, and when the formed continuous information flow is subsequently scrambled, all the multiplexed information will be scrambled processing (including DCI and NIL), which increases the amount of calculation

[0014] The second defect: when modulating the scrambled continuous information flow, it needs to occupy a large amount of processing resources to analyze the scrambled continuous information flow, determine the DCI and NIL contained in the continuous information flow, and determine the determined NIL is set to zero, and the determined DCI is modulated

As a result, the operating efficiency of the code is reduced, the computational complexity is relatively large, and more time resources are wasted

For example, for figure 2 When the scrambled control information is modulated, such as figure 1 As shown, it is necessary to make 432 judgments on the 432 elements contained in 12 CCEs to determine the effective elements for modulation, which increases the complexity of the operation

[0015] To sum up, the transmission method of control information in the prior art has high complexity and needs to occupy more system processing resources for calculation.

Images