User equipment, base station, information reporting method, and information receiving method

• US 10,476,702 B2
• Filed: 08/03/2016
• Issued: 11/12/2019
• Est. Priority Date: 08/13/2015
• Status: Active Grant

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Takahashi, Hideaki, Umeda, Hiromasa, Hapsari, Wuri Andarmawanti, Uchino, Tooru
• Primary Examiner(s): Soe, Kyaw Z
• Application Number:
  US15/541,729
• Publication Number:
  US 20180019898A1
• Time in Patent Office: 1,196 Days
• CPC Class Codes: H04L 25/0204 of multiple channels
• CPC Class Codes: H04L 27/2657 Carrier synchronisation
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0098 Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/51 based on terminal or device properties
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 8/24 Transfer of terminal data

Abstract

There is provided user equipment for communicating with a base station in a radio communication system supporting carrier aggregation, the user equipment including a generator that generates band combination information indicating one or more band combinations capable of being used for the carrier aggregation in the user equipment; and a transmitter that transmits the generated band combination information to the base station, wherein the generator generates the band combination information including highest band combination information indicating a highest band combination having a largest number of CCs to be combined, among the one or more band combinations capable of being used for the carrier aggregation in the user equipment.

Claims

1. A user equipment for communicating with a base station in a radio communication system supporting carrier aggregation, the user equipment comprising:

a processor that generates, upon detecting that a plurality of bands supported by the base station is reported from the base station, band combination information indicating one or more band combinations capable of being used for the carrier aggregation in the user equipment; and

a transmitter that transmits the generated band combination information to the base station,

wherein the processor generates the band combination information including highest band combination information corresponding to the band combination having the largest number of component carriers (CCs) to be combined, among the one or more band combinations capable of being used for the carrier aggregation in the user equipment.

2. The user equipment according to claim 1, wherein, upon being instructed by the base station, the processor generates the band combination information;

and, upon not being instructed by the base station, the processor generates band combination information in accordance with a specific format.

3. The user equipment according to claim 2, wherein, upon being instructed by the base station to report, among all band combinations with numbers of CCs that are less than a number of CCs of a predetermined band combination, a band combination including a parameter that is different from a parameter corresponding to the predetermined band combination, the processor generates, instead of the highest band combination information, the band combination information including information indicating the band combination including the parameter that is different from the parameter corresponding to the predetermined band combination, among all the band combinations with the numbers of CCs that are less than the number of CCs of the predetermined band combination.

4. The user equipment according to claim 1, wherein, upon being instructed by the base station to report, among all band combinations with numbers of CCs that are less than a number of CCs of a predetermined band combination, a band combination including a parameter that is different from a parameter corresponding to the predetermined band combination, the processor generates, instead of the highest band combination information, the band combination information including information indicating the band combination including the parameter that is different from the parameter corresponding to the predetermined band combination, among all the band combinations with the numbers of CCs that are less than the number of CCs of the predetermined band combination.

5. A base station for communicating with user equipment in a radio communication system supporting carrier aggregation, the base station comprising:

a transmitter that reports to the user equipment a plurality of bands supported by the base station;

a receiver that receives, from the user equipment, upon the user equipment detecting that the plurality of bands supported by the base station is reported, band combination information indicating one or more band combinations for the carrier aggregation; and

a processor that determines a band combination capable of being used in the user equipment depending on the one or more band combinations included in the band combination information received by the receiver,

wherein, upon detecting that the band combination information includes highest band combination information corresponding to the band combination having the largest number of component carriers (CCs) to be combined, among the one or more band combinations capable of being used for the carrier aggregation in the user equipment, the processor determines that the user equipment is capable of using the highest band combination and all band combinations, each having a number of CCs that is less than the number of CCs in the highest band combination.

6. An information reporting method to be executed by user equipment for communicating with a base station in a radio communication system supporting carrier aggregation, the information reporting method comprising:

a generation step of generating, upon detecting that a plurality of bands supported by the base station is reported from the base station, band combination information indicating one or more band combinations capable of being used for the carrier aggregation in the user equipment; and

a transmission step of transmitting the generated band combination information to the base station,

wherein the generation step generates the band combination information including highest band combination information corresponding to the band combination having the largest number of component carriers (CCs) to be combined, among the one or more band combinations capable of being used for the carrier aggregation in the user equipment.

7. An information receiving method to be executed by a base station for communicating with user equipment in a radio communication system supporting carrier aggregation, the information receiving method comprising:

a reporting step of reporting to the user equipment a plurality of bands supported by the base station;

a reception step of receiving, from the user equipment, upon the user equipment detecting that the plurality of bands supported by the base station is reported, band combination information indicating one or more band combinations for the carrier aggregation; and

a determination step of determining a band combination capable of being used in the user equipment depending on the one or more band combinations included in the received band combination information,

wherein, upon detecting that the band combination information includes highest band combination information corresponding to the band combination having the largest number of component carriers (CCs) to be combined, among the one or more band combinations capable of being used for the carrier aggregation in the user equipment, the determination step determines that the user equipment is capable of using the highest band combination and all band combinations, each having a number of CCs that is less than the number of CCs in the highest band combination.