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US 9,854,573 B2Granted
Reception and configuration of downlink control channel
AssigneeGoogle Inc.
InventorsKyu Jin Park, Woo-Jin Choi
Life of this patent
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Abstract
The disclosure is related to reception and configuration of a downlink control channel. Particularly, the present disclosure relates to a method and an apparatus (e.g., user equipment) for receiving a downlink control channel located in a data region, and a method and an apparatus (e.g., a transmission/reception point) for configuring and transmitting the downlink control channel.
Claims18
A method of receiving a downlink control channel located in a data region, in user equipment (UE), the method comprising:
- receiving an enhanced physical downlink control channel (EPDCCH) from a transmission/reception point, wherein the EPDCCH includes a data region of one or more physical resource-block (PRB) pairs forming each of a plurality of EPDCCH sets in a subframe, and wherein (i) each PRB pair includes a plurality of enhanced resource element groups (EREGs), and (ii) an enhanced control channel element (ECCE) corresponding to a basic unit of an EPDCCH transmission includes a plurality of EREGs;
- and
- decoding the EPDCCH in a corresponding EPDCCH set according to a downlink control information (DCI) format in an EPDCCH UE-specific search space, wherein ECCEs monitored by the user equipment for the decoding of the EPDCCH are defined by a function of (i) a radio network temporary identifier (RNTI) of the user equipment, (ii) an index of the subframe, (iii) an aggregation level, and (iv) a total number of ECCEs of the corresponding EPDCCH set,
- wherein in the case that each PRB pair includes an M number of EREGs,
- the ECCE includes an M/4 number of EREGs or an M/2 number of EREGs, wherein the M is a natural number.
2 more elements
A method of configuring a downlink control channel located in a data region, in a user equipment (UE)-specific search space, in a transmission/reception point, the method comprising:
- forming an enhanced physical downlink control channel (EPDCCH), wherein the forming the EPDCCH includes defining enhanced control channel elements (ECCEs) corresponding to a basic unit of an EPDCCH transmission in an EPDCCH UE-specific search space, by using a function of a radio network temporary identifier (RNTI) of user equipment, an index of the subframe, an aggregation level, and a total number of ECCEs of a corresponding EPDCCH set, and wherein (i) the EPDCCH includes a data region of one or more physical resource-block (PRB) pairs forming each of a plurality of EPDCCH sets in a subframe, (ii) each PRB pair includes a plurality of enhanced resource element groups (EREGs), and (iii) each of the ECCEs includes a plurality of EREGs;
- and
- transmitting the ECCEs defined in the EPDCCH UE-specific search space, through the EPDCCH to the user equipment,
- wherein in the case that each PRB pair includes an M number of EREGs,
- the ECCE includes an M/4 number of EREGs or an M/2 number of EREGs, wherein the M is a natural number.
2 more elements
User equipment (UE) for receiving a downlink control channel located in a data region, the user equipment comprising:
- a receiver configured to receive an enhanced physical downlink control channel (EPDCCH) from a transmission/reception point, wherein the EPDCCH includes a data region of one or more physical resource-block (PRB) pairs forming each of a plurality of EPDCCH sets in a subframe, and wherein (i) each PRB pair includes a plurality of enhanced resource element groups (EREGs), and (ii) an enhanced control channel element (ECCE) corresponding to a basic unit of an EPDCCH transmission includes a plurality of EREGs;
- and
- a control processor configured to decode the EPDCCH in a corresponding EPDCCH set according to a downlink control information (DCI) format in an EPDCCH UE-specific search space, wherein ECCEs monitored by the user equipment for the decoding of the EPDCCH is defined by a function of a radio network temporary identifier (RNTI) of the user equipment, an index of the subframe, an aggregation level, and a total number of ECCEs of the corresponding EPDCCH set,
- wherein in the case that each PRB pair includes an M number of EREGs,
- the ECCE includes an M/4 number of EREGs or an M/2 number of EREGs, wherein the M is a natural number.
2 more elements
A transmission/reception point for configuring a downlink control channel located in a data region, in an EPDCCH user equipment (UE)-specific search space, the transmission/reception point comprising:
- a control processor to configured to form an enhanced physical downlink control channel (EPDCCH), wherein the forming the EPDCCH includes defining enhanced control channel elements (ECCEs) corresponding to a basic unit of an EPDCCH transmission, in the EPDCCH UE-specific search space, by using a function of a radio network temporary identifier (RNTI) of user equipment, an index of the subframe, an aggregation level, and a total number of ECCEs of a corresponding EPDCCH set, and wherein (i) the EPDCCH includes a data region of one or more physical resource-block (PRB) pairs forming each of a plurality of EPDCCH sets in a subframe, (ii) each PRB pair includes a plurality of enhanced resource element groups (EREGs), and (iii) each of the ECCEs includes a plurality of EREGs;
- and
- a transmitter configured to transmit the ECCEs defined in the EPDCCH UE-specific search space, through the EPDCCH to the user equipment,
- wherein in the case that each PRB pair includes an M number of EREGs,
- the ECCE includes an M/4 number of EREGs or an M/2 number of EREGs, wherein the M is a natural number.
2 more elements
Dependencies are inferred from the claim text.