Heterogeneous network switching control method, signal transmission method, equipment and communication system

Abstract

The embodiment of the invention discloses a heterogeneous network switching control method, a signal transmission method, signal transmission equipment and a communication system. In the embodiment of the invention, adjacent/covered overlapped base stations all adopt the combination design of first-type and second-type carriers, and at least a pair of the first-type and second-type carriers of the adjacent/covered overlapped base stations are identical in frequency; and the adjacent/covered overlapped base stations transmit physical downlink control channel (PDCCH) signaling, physical control format indicator channel (PCFICH) signaling, physical hybrid automatic repeat request indicator channel (PHICH) signaling and cell-specific reference symbols (CRS) in physical control channels of the first-type carriers, and transmit the CRSs on the second-type carriers. Therefore, user equipment (UE) can be ensured to obtain accurate physical control channel mobility measurement results of cells of the adjacent/covered overlapped base stations and timely trigger measurement reporting in same-frequency measurement; moreover, the service continuity of a user can be relatively better ensured, and unnecessary uplink/downlink data channel interference between neighbor cells can be avoided.

Description

Technical field [0001] The present invention relates to the field of communication technology, in particular to a heterogeneous network switching control method, a signal sending method and equipment, and a communication system. Background technique [0002] With the continuous evolution of communication systems, some cell / network communication nodes suitable for different scenarios and with different coverage areas have developed. [0003] Taking the Long Term Evolution / LTE-Advanced (LTE / LTE-A) system of the 3rd Generation Partnership Project (3GPP) as an example, it has developed a system suitable for home / office coverage. Home base station (HeNB, Home eNB), pico eNB suitable for residential cell coverage, relay station suitable for expanding the edge throughput of macro cell, and macro base station. Among them, the deployment of multiple nodes can form such as Figure 1-a In the illustrated heterogeneous network communication scenario, in the middle of some coverage overlapping ...

AI Technical Summary

Problems solved by technology

[0006] During the research and practice of the existing technology, the inventors found that the mechanism for avoiding co-frequency interference in the existing heterogeneous network may cause the UE of LTE Rel-8 / 9 version to perform too many inter-frequency measurements, thus Increase the power consumption of the UE due to inter-frequency measurement; and, when the UE of the Rel-8 / 9 version enters a cell with a small coverage from a cell with a large coverage, the signal strength of the physical control channel on carrier f1 is better than that of the physical data channel, while the UE performs mobility measurements on the physical control channel and scheduling measurements on the data channel

At this time, due to the orthogonality of the physical control channels between the two cells, when the UE enters the coverage area of ​​the adjacent cell, the source cell still has good mobility measurement performance, so the UE's mobility report cannot be triggered in time. Perform cell handover, which may lead to strong interference on the physical data channel

Images