Method for sending and receiving physical downlink control channel (PDCCH) signaling, base station, user equipment (UE) and system thereof

Abstract

The present invention provides a PDCCH signaling sending and receiving method, base station, UE and system, wherein the sending method includes: the base station determines the positions of the first search space and the second search space; if the first search space does not include the PDCCH signal of CIF The length of the command is equal to the length of the PDCCH signaling including the CIF in the second search space, and there is a physical overlapping area between the first search space and the second search space, then in the physical overlapping area, the base station only transmits the non- PDCCH signaling including CIF to UE. The method, base station, UE and system provided by the embodiments of the present invention can avoid ambiguous scheduling of the base station, thereby avoiding the problem of UE parsing error.

Description

technical field [0001] Embodiments of the present invention relate to the field of communication technologies, and in particular, to a physical downlink control channel (Physical Downlink Control Channel, PDCCH for short) signaling sending and receiving method, base station, user equipment (User Equipment, UE for short) and system. Background technique [0002] In the evolved LTE system (LTE-Advanced, referred to as LTE-A), the carrier aggregation (Carrier Aggregation, referred to as CA) technology is introduced, that is, the resources of multiple component carriers (Component Carrier, referred to as CC) are simultaneously scheduled to a user equipment (User Equipment, referred to as UE) to meet higher peak rates and business needs. [0003] In a system that does not adopt the CA technology, one Physical Downlink Control Channel (PDCCH for short) signaling can only schedule resources of one carrier. In a system using the CA technology, if a UE aggregates multiple carriers t...

AI Technical Summary

Problems solved by technology

However, after the base station sends the semi-static RRC signaling, it needs to receive the RRC Connection Reconfiguration Complete signaling (RRC Connection Reconfiguration Complete) fed back by the UE to determine that the UE has correctly received the semi-static RRC signaling. During the period from the static RRC signaling to the base station receiving the RRC connection reconfiguration completion signaling fed back by the UE, the base station has the problem of ambiguous scheduling

[0006] The following problems exist in the prior art: during the period from when the base station sends the semi-static RRC signaling to when the base station receives the RRC connection reconfiguration completion signaling fed back by the UE, the base station has the problem of ambiguous scheduling, which leads to UE parsing wrong question

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