Resource allocation for transmissions on unlicensed carriers

Patent metadata

Field	Value
Publication number	US-11445494-B2
Application number	US-202017037314-A
Country	US
Kind code	B2
Filing date	Sep 29, 2020
Priority date	Nov 7, 2014
Publication date	Sep 13, 2022
Grant date	Sep 13, 2022

Abstract

The disclosure 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. An integrated circuit which, in operation, controls a process of a communication apparatus for performing communication between the communication apparatus and a radio control entity in a communication system, the process comprising:
receiving a downlink control information (DCI) message of a particular format from the radio control entity;
identifying first radio resources associated with the received DCI message of the particular format; and
performing communication between the communication apparatus and the radio control entity using the identified first radio resources via a particular carrier,
wherein the particular carrier is an unlicensed carrier,
wherein the first radio resources are defined according to a particular resource allocation type,
wherein the particular resource allocation type is a resource allocation type, from a plurality of uplink and downlink resource allocation types, which is specific to the first radio resources for use in connection with the particular carrier, and
wherein the plurality of uplink and downlink resource allocation types includes one or more of downlink resource allocation types 0, 1, and 2 according to a 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) specification and at least one of the one or more of downlink resource allocation types 0, 1, and 2 is reused for defining the first radio resources for use in connection with the particular carrier.

2. The integrated circuit according to claim 1 , wherein the particular format of the DCI message is a format for a downlink communication, and the identified first radio resources are used by the communication apparatus to receive the downlink communication from the radio control entity, and
wherein the DCI message includes:
a carrier identification field in a case of cross carrier scheduling; or
a transmit power command field in a 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.

3. The integrated circuit according to claim 1 , wherein the particular format of the DCI message is a format for an uplink communication, and the identified first radio resources are used by the communication apparatus to transmit the uplink communication to the radio control entity, and
wherein the DCI message includes:
a carrier identification field in a case of cross carrier scheduling; or
a transmit power command field in a 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.

4. The integrated circuit according to claim 1 , wherein the first radio resources include:
all resource blocks of the particular carrier respectively for one or more subframes, or
a part of all resource blocks of the particular carrier respectively for one or more subframes, and
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
a plurality of contiguous resource blocks around a middle frequency of the carrier.

5. The integrated circuit according to claim 1 , wherein second radio resources are configured in the communication apparatus for use in connection with the particular carrier and are associated with the particular format of the DCI message, and
wherein the communication apparatus is preconfigured with at least one of the first or second radio resources by the radio control entity, and upon receiving the DCI message of the particular format received from the radio control entity, said at least one of the first or second radio resources are identified by the circuitry and used for communication between the communication apparatus and the radio control entity via the particular carrier, or
the communication apparatus is allocated one of the at least one of the first or second radio resources based on the DCI message of the particular type, received from the radio control entity, the received DCI message indicating one or more of the at least one of the first or second radio resources that shall be used for communication over the particular carrier.

6. The integrated circuit according to claim 1 , wherein the process further comprises:
attempting to decode DCI messages of different formats based on an association between different transmission modes and the DCI messages of the different formats,
wherein the communication apparatus operates in at least one transmission mode that is associated with the DCI messages of different formats, and the communication apparatus attempts to decode one or more of the DCI messages of different formats associated with the transmission mode,
wherein the at least one transmission mode is also associated with the particular format of the DCI message for use with the particular carrier, and the communication apparatus attempts to decode a DCI message of the particular format on a particular carrier, and
wherein according to an association between the at least one transmission mode and the particular format of the DCI message the communication apparatus attempts to decode the DCI message of the particular format only on the particular carrier.

7. The integrated circuit according to claim 1 , wherein the first radio resources are configured for use with a licensed carrier, and the first radio resources are used for communication between the communication apparatus and the radio control entity via the licensed carrier, upon the communication apparatus receiving the DCI message of the particular format.

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

• H04W72/04

  Wireless resource allocation · CPC title

• H04W72/044

  based on the type of the allocated resource · CPC title

• H04W72/1289

  Electricity · mapped topic