Downlink control channel bandwidth adaptive adjustment method and device

An adaptive adjustment and control channel technology, applied in the field of communications, can solve problems such as increasing system overhead, and achieve the effects of reducing system overhead, optimizing resource ratio, and reducing system overhead

Inactive Publication Date: 2019-12-20
POTEVIO INFORMATION TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the shortening of TTI will make downlink control channels such as Physical Downlink Control Channel (PDCCH: Physical Downlink Control Channel) appear more frequently. At the same time, in order to ensure system throughput, symbols allocated to control channels in shortened TTI The number also needs to be reduced, and the Physical Control Format Indicator Channel (PCFICH: Physical Control Format Indicator Channel) will frequently indicate the number of symbols occupied by the downlink control channel, which will greatly increase the system overhead

Method used

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  • Downlink control channel bandwidth adaptive adjustment method and device
  • Downlink control channel bandwidth adaptive adjustment method and device
  • Downlink control channel bandwidth adaptive adjustment method and device

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Embodiment Construction

[0017] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] see figure 1 , figure 1 The flow chart of the method provided by the present invention. Such as figure 1 As shown, the process may include the following steps:

[0019] Step 101, fixedly allocate at least one symbol (symbol) in a newly defined subframe to a control channel.

[0020] In the present invention, in order to meet the requirement of low delay, a new type of subframe is redefined, and the newly defined subframe structure is composed of 1 to N symbols.

[0021] As an embodiment of the present invention, in step 101, permanently assigning at least one symbol symbol in the newly defined subframe to the control channel may include:

[0022] The first symbol in the newly defined subframe is fixedly allocated to the control channel...

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Abstract

The present application provides a downlink control channel bandwidth adaptive adjustment method and device. In the present invention, the corresponding control channel bandwidth is selected according to the current scheduling control channel bandwidth requirement, and the PCFICH only indicates to the UE the control channel bandwidth actually required for scheduling. Compared with the prior art, this makes reasonable use of effective spectrum resources and greatly reduces system overhead.

Description

technical field [0001] The present application relates to communication technology, in particular to a method and device for adaptively adjusting bandwidth of a downlink control channel. Background technique [0002] In order to meet the requirement of low delay, the system will shorten the scheduled transmission time interval (TTI: Transmission Time Interval). TTI is a parameter in UMTS (and other digital telecommunication networks, such as LTE systems), which refers to the length of an independently decoded transmission in a wireless link. [0003] However, shortening of TTI will make downlink control channels such as Physical Downlink Control Channel (PDCCH: Physical Downlink Control Channel) appear more frequently. At the same time, in order to ensure system throughput, symbols allocated to control channels in shortened TTI The number also needs to be reduced, and the physical control format indicator channel (PCFICH: Physical Control Format Indicator Channel) will freq...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H04W72/04
CPCH04W72/23
Inventor李迪
OwnerPOTEVIO INFORMATION TECH CO LTD