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Method for sending and detecting downlink control information, base station and user equipment

A technology for controlling information and user equipment, applied in wireless communication, communication between multiple stations, advanced technology, etc., can solve problems such as adding anchor carrier blind detection

Inactive Publication Date: 2011-07-13
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this scheme is that improper choice of DCI format size will increase the blind detection in the anchor carrier, because each new DCI format size doubles the number of blind detections

Method used

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  • Method for sending and detecting downlink control information, base station and user equipment
  • Method for sending and detecting downlink control information, base station and user equipment
  • Method for sending and detecting downlink control information, base station and user equipment

Examples

Experimental program
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Effect test

Embodiment 1

[0082] In this embodiment, the indication information related to the user equipment physical downlink control channel monitoring set and / or component carrier activation / deactivation included in the second type of DCI is used to indicate the first type of information on each component carrier in the UE downlink component carrier set. Presence or absence of UE-specific DCI, or activation or deactivation of each component carrier.

[0083] The second type of DCI in this embodiment can be designed as a bitmap (bitmap) indication format whose size (number of bits) is the same as the number of component carriers in the UE downlink component carrier set, that is, each UE downlink component carrier occupies One bit, the 1 / 0 of the bit indicates whether the UE needs to perform blind detection on the component carrier corresponding to the bit, or whether the component carrier corresponding to the bit needs to be activated. The corresponding relationship between each component carrier an...

Embodiment 2

[0089] In this embodiment, the indication information related to the user equipment physical downlink control channel monitoring set and / or component carrier activation / deactivation contained in the second type of DCI is used to indicate the PDSCH / PDSCH in each component carrier in the UE downlink component carrier set. The aggregation level of the first type of UE-specific DCI corresponding to the PUSCH. The second type of DCI is sent on the UE-specific anchor carrier. Note that the first type of UE-specific DCI corresponding to the PDSCH / PUSCH in a certain component carrier is not necessarily in the component carrier, but may be implemented in other component carriers through cross-carrier scheduling.

[0090] Different from the scheme proposed in R1-083609, the second type of DCI in this embodiment can be designed as a format with the same size as the DCI format 0 / 1A format in LTE, so as to avoid the increase in the size of the new DCI format However, the number of times o...

Embodiment 3

[0113] In this embodiment, the indication information related to the user equipment physical downlink control channel monitoring set and / or component carrier activation / deactivation includes: indicating the first type of UE-specific DCI in each component carrier except the UE-specific anchor carrier The presence or absence of the UE-specific DCI aggregation level of the first type of UE-specific DCI corresponding to the PDSCH / PUSCH in each component carrier except the UE-specific anchor carrier. The combination of special aggregation levels is used to indicate the component carrier corresponding to the combination If there is no PDSCH / PUSCH corresponding to the current UE or the component carrier corresponding to the combination can turn off reception. The second type of DCI is sent on the UE-specific anchor carrier. Note that the UE-specific DCI of the first type corresponding to the PDSCH / PUSCH in a certain component carrier is not necessarily in the component carrier, but m...

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Abstract

The invention discloses a base station, which comprises a downlink control information generating and sending unit, wherein the downlink control information generating and sending unit is used for sending downlink control information to user equipment through a physical downlink control channel on a component carrier; the downlink control information comprises first type downlink control information and / or second type downlink control information; the first type downlink control information comprises shared downlink control information and user equipment special downlink control information; and the second type downlink control information comprises indication information related to monitoring collection of the physical downlink control channel of the user equipment and component carrier activation / close. Correspondingly, the invention also discloses the user equipment, and a method which is used for sending and detecting the downlink control information of the base station and the user equipment respectively. According to the invention, the user equipment can realize fast and effective blind detection process and component carrier activation and close processes, so that the complexity of the blind detection and the power consumption for receiving component carrier data are effectively reduced.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method for transmitting downlink control information, a method for detecting downlink control information, a base station and user equipment in an LTE-Advanced system using carrier aggregation technology or other 4G mobile communication systems. Background technique [0002] The LTE (Long Term Evolution, long-term evolution) system defines the following three downlink physical control channels: [0003] PCFICH (Physical Control Format Indicator CHannel, Physical Control Format Indicator Channel): used to indicate OFDM (Orthogonal Frequency Division Multiplex, Orthogonal Frequency Division Multiplexing) used to transmit PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel) in a subframe ) number information of symbols. [0004] PHICH (Physical Hybrid ARQ Indicator CHannel, Physical Hybrid ARQ Indicator CHannel): ACK / NACK feedback information ...

Claims

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Application Information

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IPC IPC(8): H04W88/08H04B7/26
CPCY02D30/70
Inventor 杨曾刘仁茂张应余梁永明丁铭
Owner SHARP KK
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