Method and device for monitoring downlink control channel
AssigneeLG Electronics Inc.
InventorsHakseong Kim, Hanbyul Seo, Byounghoon Kim
Life of this patent
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Abstract
A method for monitoring a control channel in a wireless communication system and a wireless device using the same are provided. The wireless device monitors a downlink control channel in at least one physical resource block (PRB) pair of a subframe that is assigned for an enhanced physical downlink control channel (EPDCCH) set. A beatstream for downlink control information of the downlink control channel is scrambled by a scrambling sequence that is initialized on the basis of a scrambling initialization value allocated to the EPDCCH set.
Claims12
A method for monitoring a control channel in a wireless communication system, the method comprising:
- receiving, by the wireless device, configuration information to configure an enhanced physical downlink control channel (EPDCCH) set from a base station, the configuration information including a resource assignment indicating at least one physical resource block-pair and scrambling initialization information indicating a scrambling initialization value,
- wherein the configuration information further includes an identifier of the EPDCCH set;
- monitoring, by a wireless device, a downlink control channel in the EPDCCH set;
- generating, by the wireless device, a scrambling sequence;
- and
- descrambling, by the wireless device, a bit stream for downlink control information on the downlink control channel with the scrambling sequence,
- wherein the generation of the scrambling sequence is initialized with Cinit=(floor(ns/2))29+ni, where ns denotes a slot number within a radio frame, floor (x) denotes a largest integer not greater than x, and ni denotes the scrambling initialization value assigned for the EPDCCH set.
A device configured to monitor a control channel in a wireless communication system, the device comprising:
- a processor;
- and
- a radio frequency (RF) unit configured to receive configuration information to configure an enhanced physical downlink control channel (EPDCCH) set from a base station, the configuration information including a resource assignment indicating at least one physical resource block-pair and scrambling initialization information indicating a scrambling initialization value,
- wherein the configuration information further includes an identifier of the EPDCCH set;
- and
- a memory operatively coupled with the processor and storing instructions that, when executed by the processor, cause the device to monitor a downlink control channel in the EPDCCH set,
- wherein the processor is configured to generate a scrambling sequence and descramble a bit stream for downlink control information on the downlink control channel with the scrambling sequence, and
- wherein the processor initializes the generation of the scrambling sequence with cinit=(floor (ns/2))29+ni, where ns denotes a slot number within a radio frame, floor (x) denotes a largest integer not greater than x, and ni denotes a the scrambling initialization value assigned for the EPDCCH set.
A method for transmitting downlink control information in a wireless communication system, performed by a base station, the method comprising:
- transmitting configuration information to configure an enhanced physical downlink control channel (EPDCCH) set to a user equipment, the configuration information including a resource assignment indicating at least one physical resource block-pair and scrambling initialization information indicating a scrambling initialization value,
- wherein the configuration information further includes an identifier of the EPDCCH set;
- generating a bit stream for the downlink control information;
- generating a scrambling sequence;
- scrambling the bit stream for the downlink control information with the scrambling sequence;
- and
- transmitting the scrambled bit stream in the EPDCHH set,
- wherein the generation of the scrambling sequence is initialized with cinit=(floor(ns/2))29+ni, where ns denotes a slot number within a radio frame, floor (x) denotes a largest integer not greater than x, and ni denotes the scrambling initialization value assigned for the EPDCCH set.
Dependencies are inferred from the claim text.