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Carrier switching method and system

A carrier switching and carrier technology, which is applied in modulation carrier systems, transmission systems, multi-frequency code systems, etc., and can solve problems such as inability to achieve fast carrier switching, inability to utilize channels, and inability to ensure switching.

Inactive Publication Date: 2021-05-14
POTEVIO INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current RAN4 standard, a maximum of 2 carriers are configured for the uplink. In this case, if the carrier aggregation technology is used, the uplink is only concentrated on a small number of carriers (for example, two carriers) for aggregation, and the number of carriers considered during carrier switching is too small. It may not be possible to utilize the uplink carrier with good channel quality, and cannot achieve fast carrier switching
[0004] It can be seen that in the existing LTE system, due to the small number of uplink carriers configured for the UE, the application of fast carrier switching in carrier aggregation is limited, and it is impossible to ensure that the uplink carrier with good channel quality is selected for switching. Advantages of Carrier Switching

Method used

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  • Carrier switching method and system
  • Carrier switching method and system

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Embodiment Construction

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] The core idea of ​​the present invention is: when carrier switching is required, the base station notifies the UE to perform SRS detection on the unconfigured uplink carrier. Carrier switching processing is performed within the carrier range. In this way, by triggering the UE to measure the channel quality of the unconfigured uplink carrier, the channel quality of the unconfigured uplink carrier can be used to assist the base station in selecting the optimal carrier for transmission, so that the UE can use the uplink carrier with the best channel quality for transmission. Transmission, therefore, can give full play to the advantages of fast carrier switching in carrier aggregation.

[0021] figure 1 It is a schematic flow diagram...

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Abstract

The present application discloses a carrier switching method and system, including: the network side pre-groups the unconfigured uplink carriers of the user equipment UE, and notifies the UE of the obtained unconfigured uplink carrier groups; when the When the UE needs to perform uplink carrier switching, the base station selects the unconfigured uplink carrier group that the UE currently needs to detect from the unconfigured uplink carrier group and notifies the UE; Notify that the sounding reference signal (SRS) is sent on each carrier in the selected unconfigured uplink carrier group; the base station uses the SRS to obtain the uplink channel quality of the corresponding carrier, and the UE's downlink carrier corresponding to the unconfigured Within the range of the uplink carrier and the configured uplink carrier of the UE, perform uplink carrier switching for the UE according to the quality of the uplink channel. By adopting the present invention, the advantages of fast carrier switching can be fully utilized.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular to a carrier switching method and system in carrier aggregation. Background technique [0002] In an LTE network, it is expected that each base station (eNB) has a large number of available carriers for data transmission, and the carriers can be configured as PCells or SCells. Due to the existence of authorized secondary cells (SCells) and unlicensed LAA SCells, the LTE standard 3GPP Rel-13 version supports a maximum of 32 component carriers. For efficient operation of a large number of carriers, advanced carrier aggregation techniques are meaningful. For example, fast load balancing and migration between carriers, fast interference coordination and avoidance. This load balancing and migration facilitates increased throughput and reduced disruption. For unlicensed LAA carriers, less occupied carriers are selected when the interference increases. This kind of fast handove...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04W72/04H04W72/08
CPCH04L27/261H04W72/0453H04W72/542
Inventor 鲁智池连刚
Owner POTEVIO INFORMATION TECH CO LTD