Allocation method, device and base station for physical downlink control channel time domain symbolic number

A technology of physical downlink control and time-domain symbols, applied in the field of communication, can solve the problems of frequency-domain resource waste, unschedulable, PDCCH resource waste, etc., and achieve the effect of improving QoS, increasing average throughput rate, and reducing PDCCH resource waste

Active Publication Date: 2009-11-25
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the number of time-domain symbols allocated by the configured PDCCH is too large, the scheduling information for the UE will only occupy a small amount of PDCCH resources, and a large amount of PDCCH resources will be wasted. If the number of time-domain symbols allocated by the configured PDCCH is too small , it will cause the UE that needs to be scheduled to be scheduled due to insufficient PDCCH resources, and the frequency domain resources of PDSCH are more likely to be wasted

Method used

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  • Allocation method, device and base station for physical downlink control channel time domain symbolic number
  • Allocation method, device and base station for physical downlink control channel time domain symbolic number
  • Allocation method, device and base station for physical downlink control channel time domain symbolic number

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Embodiment 1

[0024] In order to reasonably allocate PDCCH resources and PDSCH frequency domain resources, an embodiment of the present invention provides a method for allocating the number of symbols in the time domain of the physical downlink control channel. The method for allocating the number of symbols in the time domain of the physical downlink control channel in the embodiment of the present invention includes:

[0025] According to the number of time-domain symbols allocated by the physical downlink control channel of the previous M historical transmission time intervals and the usage of the number of time-domain symbols allocated by the physical downlink control channel of the previous transmission time interval, the current transmission time to be scheduled is The interval physical downlink control channel allocates the number of symbols in the time domain, where M is a natural number.

[0026] The "historical transmission time interval" is the transmission time interval before th...

Embodiment 2

[0031] The embodiment of the present invention also provides a method for allocating the number of symbols in the time domain of the physical downlink control channel, such as figure 1 shown, including:

[0032] 201. Obtain the number of time-domain symbols allocated by the physical downlink control channel of the previous M historical transmission time intervals, where M is a natural number;

[0033] Specifically, an array may be set for storing the number of time-domain symbols allocated by the PDCCH of the previous M historical TTIs, and M may be set as any positive integer value. For example, set the array abySymbNum[M], M is set to 4.

[0034] In addition, before allocating PDCCH resources to the first TTI that needs to be scheduled, initialize the array and the correction flag described later, and assign effective values ​​to the number of symbols in the time domain stored in the array. For example, before performing PDCCH resource allocation for the first TTI that nee...

Embodiment 3

[0047] The embodiment of the present invention also provides a device for allocating the number of symbols in the time domain of the physical downlink control channel, such as image 3 shown, including:

[0048] The number of symbols determination unit 301 is configured to use the number of time-domain symbols allocated to the physical downlink control channel of the previous M historical transmission time intervals and the number of time-domain symbols allocated to the physical downlink control channel of the previous transmission time interval , to determine the number of time-domain symbols allocated to the physical downlink control channel of the transmission time interval that currently needs to be scheduled, where M is a natural number.

[0049] The number of symbols determination unit 301 may be to obtain one of the number of time-domain symbols allocated by the physical downlink control channel of the previous M historical transmission time intervals, and then accordin...

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Abstract

The invention discloses an allocation method, a device and a base station for the physical downlink control channel time domain symbolic number, relating to the communications field. The invention allocates the time domain symbolic number for the physical downlink control channel of the transmission time interval which needs scheduling based on the application circumstance of the time domain symbolic number which is allocated by the physical downlink control channel of the former M history transmission time interval and the time domain symbolic number which is allocated by the physical downlink control channel of the previous transmission time interval so as to decrease the waste of the physical downlink control channel resource and the physical downlink shared channel frequency domain resource.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a method, device and base station for allocating the number of symbols in the time domain of a physical downlink control channel. Background technique [0002] The air interface communication of the LTE (Long Term Evolution, long term evolution) system is based on a 1 ms TTI (Transmission Time Interval, transmission time interval) scheduling manner. A UE (UserEquipment, user equipment) detects a PDCCH (Physical Downlink ControlChannel, physical downlink control channel) at each activated TTI, and when the UE determines that there is scheduling information for the UE according to the PDCCH, if the scheduling information is downlink scheduling information, then The UE receives corresponding PDSCH (Physical Downlink Shared Channel, Physical Downlink Shared Channel) data according to the scheduling information. [0003] The sum of the number of time-domain symbols allocated by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04W72/14
Inventor 杨炼
Owner HUAWEI TECH CO LTD
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