US 11,540,320 B2 · User terminal, radio base station and radio communication method

Abstract

In order to realize appropriate communications in a next generation communication system, the present invention provides a user terminal including: a reception section that receives broadcast information transmitted from a radio base station; and a control section that controls reception in a random access procedure. The reception section receives given broadcast information in the random access procedure. The given broadcast information may be broadcast information for a specific user terminal group.

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Drawings

Claims5

Dependent claims

A terminal comprising:

a transmitter that transmits a random access preamble in at least one resource, of resources that are respectively associated with a plurality of services the terminal wishes to use;
and
a receiver that receives system information to use at least one of the plurality of services the terminal wishes to use, the system information corresponding to the at least one resource in which the random access preamble is transmitted,
wherein the receiver receives the system information by use of a random access response or a contention resolution message,
a type of the system information, that is received by use of the random access response or the contention resolution message, corresponds to:
the at least one resource in which the random access preamble is transmitted, and
the at least one of the plurality of services the terminal wishes to use,
the plurality of services the terminal wishes to use are respectively associated with different random access preamble resources the terminal wishes to use,
the terminal transmits the random access preamble in the resource corresponding to the type of the system information, and
the resource comprises a frequency bandwidth and one or more time-domain symbols available for transmitting the random access preamble.

7 more elements

Dependencies are inferred from the claim text.

Description11,724 words

Summary642 words

#The present invention relates to a user terminal, a radio base station and a radio communication method in a next-generation communication system.

#In a UMTS (Universal Mobile Telecommunications System) network, for the purposes of achieving higher-speed data rates, providing low delay and so on, long-term evolution (LTE) has been standardized (see Non Patent Literature 1). For the purposes of achieving further broadbandization and higher speed beyond LTE (also called LTE Rel. 8), LTE Advanced (also called Rel. 10, 11 or 12) has been standardized and successor systems to LTE (LTE Rel. 13 or later) have been also studied.

#In LTE Rel. 10/11, in order to achieve broadbandization, there has been introduced carrier aggregation (CA) in which a plurality of component carriers (CCs) are aggregated. Each CC corresponds one unit of the system band of LTE Rel. 8. In CA, a user terminal (UE: User Equipment) is configured with a plurality of CCs of the same radio base station (eNB: eNodeB).

Brief description of the drawings16 figures

#FIGS. 1A and 1B are diagrams illustrating an example of operation of a future radio communication system;

#FIGS. 2A and 2B area diagrams illustrating another example of operation of a future radio communication system;

#FIG. 3 is a diagram for explaining the random access procedure in the existing system;

Detailed description10,764 words

#As the access scheme used in future new communication systems (which may be called 5G RAT, New RAT or the like), there has been studied an extension to the access scheme used in the existing LTE/LTE-A system (also called LTE RAT, LTE-Based RAT).

#A New RAT cell may be arranged overlapping the coverage of the LTE RAT cell or may be arranged independently. FIG. 1A illustrates the New RAT cell overlaps the coverage of the LTE-based RAT cell.

#The user terminal is considered to be connected to both of the LTE system and 5G system by using carrier aggregation (CA) and/or dual connectivity (DC). Further, in New RAT, operation of stand-alone has been also expected. Stand-alone means that the user terminal operates (camps on) in New RAT alone. In this case, the user terminal is able to have initial connection with respect to the New RAT.

Facts

Application

16/070,013Filed 12 Jan 2017

Priority

JP JP2016-00654915 Jan 2016

Published

US 2019/0037606 A131 Jan 2019

Granted

27 Dec 2022

Term ends

12 Jan 2037

Estimated · how

20 years from earliest known nonprovisional domestic filing plus recorded patent term adjustment. Maintenance-fee lapses, terminal disclaimers and statutory extensions have not been checked. The continuity chain may be incomplete; this is not an enforceability determination.

Classification16 codes

H04W 48/16
Access restriction ; Network selection; Access point selection: discovering, processing access restriction or access information
H04W 68/02
User notification, e.g. alerting and paging, for incoming communication, change of service or the like: arrangements for increasing efficiency of…
H04W 48/08
Access restriction ; Network selection; Access point selection: access restriction or access information delivery, e.g. discovery data delivery
H04W 48/14
Access restriction or access information delivery, e.g. discovery data delivery: using user query or user detection

Timeline

15 Jan 2016Priority claimedJP JP2016-006549
12 Jan 2017Application filedUS 16/070,013
13 Jul 2018Assigned to Ntt Docomo, Inc.assignment of assignor's interest
31 Jan 2019PublishedUS 2019/0037606 A1
27 Dec 2022GrantedUS 11,540,320 B2
12 Oct 2026TodayWithin its term
12 Jan 2037Term endsEstimated

User terminal, radio base station and radio communication method

Life of this patent

User terminal, radio base station and radio communication method

Life of this patent

Life of this patent

Abstract

Drawings

Drawings

Claims5

Description11,724 words

Drawings

Classification16 codes

Life of this patent

Description11,724 words