Method for transmitting control information, method and device for receiving control information

Abstract

The invention relates to a method for transmitting control information, a method and device for receiving control information. The method for transmitting control information comprises the steps of: scrambling cyclic redundancy check (CRC) bits of different carriers by adopting different kinds of scrambling information, wherein the cyclic redundancy check bits of different carriers are obtained through carrying out cyclic redundancy check on control information of the different carriers; and sending the control information and the scrambled cyclic redundancy check bits. The CRC bits of the different carriers are scrambled by different kinds of scrambling information to ensure that the scrambling information corresponds to the carriers one by one, thus the different carriers of the same device are distinguished to ensure that UE (User Equipment) side can obtain the control information of different carriers of the device through a PDCCH (Packet Dedicated Control Channel), so that a plurality of downlink or uplink carriers are controlled by one downlink carrier PDCCH, and the backward compatibility is maximally maintained without remarkably increasing the processing complexity of the UE.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method for transmitting control information, a method and equipment for receiving control information. Background technique [0002] The 3rd Generation Partnership Project (3GPP) long-term evolution (LTE) project, which is regarded as a "quasi-4G" technology, uses Orthogonal Frequency Division Multiple Access (OFDMA) and multiple-input MIMO (Multiple-Input Multiple-Output, MIMO) is the core, and its main performance goals include: providing a peak rate of downlink 100Mbps and uplink 50Mbps in a 20MHz spectrum bandwidth; improving the performance of cell edge users; increasing cell capacity; reducing system delay, Specifically, the one-way transmission delay within the user plane is less than 5ms, the transition time of the control plane from the sleep state to the active state is less than 50ms, and the transition time from the resident state to the activ...

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Problems solved by technology

[0015] In the process of realizing the present invention, the inventor found that the prior art has at least the following defects: the LTE 8 system uses a C-RNTI scrambling method to indicate a certain Which UE is the PDCCH sent to? The UE at the receiving end cannot distinguish which carrier the received PDCCH is a control message for. Therefore, it is impossible to control multiple downlink or uplink carriers on a downlink carrier PDCCH.

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