Method for communicating in network supporting licensed and unlicensed bands
AssigneeElectronics and Telecommunications Research Institute
InventorsJung Sun Um, Hoi Yoon Jung, Seung Keun Park, Sung Jin Yoo
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Abstract
Disclosed is a method for communicating in a network supporting licensed and unlicensed bands. A terminal operation method comprises the steps of: detecting a control channel of a subframe #n transmitted from a base station; obtaining, from the control channel, a DCI for an uplink grant; executing channel sensing on the basis of channel connection-related information included in the DCI; and transmitting, to the base station, a subframe #(n+1) if the result of executing channel sensing is an idle state. Thus, the performance of the communication network may be improved.
Claims20
An operation method of a terminal in a communication network, the operation method comprising:
- detecting a control channel of a subframe #n transmitted from a base station;
- obtaining a downlink control information (DCI) for an uplink grant from the control channel;
- performing channel sensing based on channel access related information included in the DCI;
- and
- transmitting an uplink channel in a subframe #(n+I) to the base station when a result of the channel sensing is an idle state,
- wherein the subframe #(n+I) is an unlicensed band subframe, n is an integer equal to or greater than 0, and I is an integer equal to or greater than 0,
- wherein the channel access related information includes information indicating a channel access type 2 among a channel access type 1 and the channel access type 2, wherein the channel access type 1 indicates that the channel sensing is performed during a period corresponding to a backoff counter selected within a contention window, and the channel access type 2 indicates that the channel sensing is performed during a preconfigured period without a random backoff operation.
An operation method of a base station in a communication network, the operation method comprising:
- generating a downlink control information (DCI) including a channel access related information;
- transmitting the DCI to a terminal via a subframe #n;
- and
- receiving an uplink channel in a subframe #(n+I) scheduled by the DCI from the terminal,
- wherein the subframe #(n+I) is received from the terminal when a result of a channel sensing based on the channel access related information is determined to be an idle state, n is an integer equal to or greater than 0, and I is an integer equal to or greater than 0,
- wherein the channel access related information includes information indicating a channel access type 2 among a channel access type 1 and the channel access type 2, wherein the channel access type 1 indicates that the channel sensing is performed during a period corresponding to a backoff counter selected within a contention window, and the channel access type 2 indicates that the channel sensing is performed during a preconfigured period without a random backoff operation.
A terminal in a communication network, the terminal comprising a processor and a memory storing at least one instruction executed by the processor, wherein the at least one instruction is configured to:
- detect a control channel of a subframe #n transmitted from a base station;
- obtain a downlink control information (DCI) for an uplink grant from the control channel;
- perform channel sensing based on channel access related information included in the DCI;
- and
- transmit an uplink channel in a subframe #(n+I) to the base station when a result of the channel sensing is determined to be an idle state,
- wherein the subframe #(n+I) is an unlicensed band subframe, n is an integer equal to or greater than 0, and I is an integer equal to or greater than 0,
- wherein the channel access related information includes information indicating a channel access type 2 among a channel access type 1 and the channel access type 2, wherein the channel access type 1 indicates that the channel sensing is performed during a period corresponding to a backoff counter selected within a contention window, and the channel access type 2 indicates that the channel sensing is performed during a preconfigured period without a random backoff operation.
An operation method of a terminal in a communication network, the operation method comprising:
- receiving, from a base station, information indicating a channel access type 2 among a channel sensing type 1 and the channel sensing type 2 which is used for transmitting an uplink channel;
- performing a channel sensing operation according to the channel sensing type 2 indicated by the information in an unlicensed band;
- and
- transmitting, to the base station, the uplink channel in the unlicensed band when a result of the channel sensing operation is an idle state,
- wherein the channel sensing operation is performed based on a random backoff operation when the information indicates the channel sensing type 1, and the channel sensing operation is performed without the random backoff operation when the information indicates the channel sensing type 2.
Dependencies are inferred from the claim text.