Resource allocation for transmissions on unlicensed carriers

Patent metadata

Field	Value
Publication number	US-10292148-B2
Application number	US-201415521872-A
Country	US
Kind code	B2
Filing date	Nov 7, 2014
Priority date	Nov 7, 2014
Publication date	May 14, 2019
Grant date	May 14, 2019

Abstract

The invention relates to a method for allocating radio resources to a user terminal for performing communication between a radio control entity and the user terminal in a communication system. At least first predetermined radio resources are configured in the user terminal for use in connection with a particular carrier and are associated with a particular format of a downlink control information, DCI, message. The user terminal receives a DCI message of the particular format from the radio control entity. Upon receiving the DCI message of the particular format, the user terminal identifies the first predetermined radio resources associated with this received DCI message, and using the identified first predetermined radio resources for communication between the user terminal and the radio control entity via the particular carrier. The particular carrier can be an unlicensed carrier.

First claim

The invention claimed is:

1. A method for allocating radio resources to a user terminal for performing communication between a radio control entity and the user terminal in a communication system, wherein at least first predetermined radio resources are configured in the user terminal for use in connection with a particular carrier and are associated with a particular format of a downlink control information, DCI, message, the method being performed by the user terminal and comprising:
receiving a DCI message of the particular format from the radio control entity,
upon receiving the DCI message of the particular format, identifying the first predetermined radio resources associated with this received DCI message, and using the identified first predetermined radio resources for communication between the user terminal and the radio control entity via the particular carrier,
wherein the particular carrier is an unlicensed carrier,
wherein the first predetermined radio resources are defined according to a particular resource allocation type, and
wherein the particular resource allocation type is either:
one of the downlink resource allocation types 0, 1, or 2, or uplink resource allocation types 0, or 1 according to a 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) specification, or
a further resource allocation type specific to the first predetermined radio resources for use in connection with the particular carrier.

2. The method according to claim 1 , wherein:
the content of the DCI message does not indicate particular radio resources, or
the size of the DCI message is independent from a bandwidth of the particular carrier.

3. The method according to claim 1 , wherein the DCI message is received via the particular carrier, or
the DCI message is received via another carrier, in which case the DCI message additionally indicates the DCI message is related to the particular carrier, by use of a carrier identification in a carrier identification field of the DCI message,
wherein the other carrier is a licensed carrier of the primary cell of the user terminal.

4. The method according to claim 1 , wherein the particular format of the DCI message is a format for a downlink communication, and the identified first predetermined radio resources are used by the user terminal to receive the downlink communication from the radio control entity, wherein the DCI message includes:
a carrier identification field in case of cross carrier scheduling; or
a transmit power command field in case transmit power for transmitting in the uplink is to be adapted; or
a Hybrid Automatic Repeat ReQuest, HARQ, process number; or
at least one modulation and coding scheme field; or
at least one new data indicator field; or
at least one redundancy version field; or
a precoding information field.

5. The method according to claim 1 , wherein the particular format of the DCI message is a format for an uplink communication, and the identified first predetermined radio resources are used by the user terminal to transmit the uplink communication to the radio control entity, wherein the DCI message includes:
a carrier identification field in case of cross carrier scheduling; or
a transmit power command field in case transmit power for transmitting in the uplink is to be adapted; or
at least one field for indicating a modulation and coding scheme; or
at least one new data indicator field; or
a field for indicating a Cyclic shift for demodulation reference signal; or
a precoding information field.

6. The method according to claim 1 , wherein the first predetermined radio resources comprise:
all resource blocks of the particular carrier for respectively one or a plurality of subframes, or
a part of all resource blocks of the particular carrier for respectively one or a plurality of subframes,
wherein said part of all resource blocks is either:
a plurality of contiguous resource blocks at a lower frequency end of the carrier, or
a plurality of contiguous resources blocks at a higher frequency end of the carrier, or
plurality of contiguous resource blocks around the middle frequency of the carrier.

7. A user terminal for performing communication with a radio control entity in a communication system, wherein at least first predetermined radio resources are configured in the user terminal for use in connection with a particular carrier and are associated with a particular format of a downlink control information, DCI, message, the user terminal comprising:
a receiving unit adapted to receive receiver circuit which, in operation, receives a DCI message of the particular format from the radio control entity, and
a processor which, in operation, identifies first predetermined radio resources associated with this received DCI message, upon receiving the DCI message of the particular format, and uses the identified first predetermined radio resources for communication between the user terminal and the radio control entity via the particular carrier,
wherein the particular carrier is an unlicensed carrier,
wherein the first predetermined radio resources are defined according to a particular resource allocation type, and
wherein the particular resource allocation type is either:
one of the downlink resource allocation types 0, 1, or 2, or uplink resource allocation types 0, or 1 according to a 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) specification, or

a further resource allocation type specific to the first predetermined radio resources for use in connection with the particular carrier.

8. The user terminal according to claim 7 , wherein:
the content of the DCI message does not indicate particular radio resources, or
the size of the DCI message is independent from a bandwidth of the particular carrier.

9. The user terminal according to claim 7 , wherein the receiver circuit, in operation, receives the DCI message via the particular carrier, or
to receive the DCI message via another carrier, in which case the DCI message additionally indicates the DCI message is related to the particular carrier, by use of a carrier identification in a carrier identification field of the DCI message,
wherein the other carrier is a licensed carrier of the primary cell of the user terminal.

10. The user terminal according to claim 7 , wherein the particular format of the DCI message is a format for a downlink communication, and the identified first predetermined radio resources are used by the user terminal to receive the downlink communication from the radio control entity, wherein the DCI message includes:
a carrier identification field in case of cross carrier scheduling; or
a transmit power command field in case transmit power for transmitting in the uplink is to be adapted; or
a Hybrid Automatic Repeat ReQuest, HARQ, process number; or
at least one modulation and coding scheme field; or
at least one new data indicator field; or
at least one redundancy version field; or
a precoding information field.

11. The user terminal according to claim 7 , wherein the particular format of the DCI message is a format for an uplink communication, and the identified first predetermined radio resources are used by the user terminal to transmit the uplink communication to the radio control entity, wherein the DCI message includes:
a carrier identification field in case of cross carrier scheduling; or
a transmit power command field in case transmit power for transmitting in the uplink is to be adapted; or
at least one field for indicating a modulation and coding scheme; or
at least one new data indicator field; or
a field for indicating a Cyclic shift for de

Assignees

• Panasonic Ip Corp America

Inventors

• Golitschek Edler Von Elbwart Alexander
• Einhaus Michael
• Suzuki Hidetoshi
• Feng Sujuan
• Wang Lilei

Classifications

• H04W72/23 Primary

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W16/14 Primary

  Spectrum sharing arrangements {between different networks} · CPC title

• H04W72/044

  based on the type of the allocated resource · CPC title

• H04W72/04

  Wireless resource allocation · CPC title

• H04W72/042 Primary

  Electricity · mapped topic