US 10,098,147 B2 · Wireless communication system, receiving device, transmitting device, and wireless communication method

Abstract

Provided is a wireless communication system in which high-speed communication is implemented. A receiving device includes an RA managing unit that transmits Msg1 through a PRACH over an SCELL and a D-SR managing unit that transmits a D-SR through a PUCCH over a PCELL before or after the PRACH. A transmitting device includes an RA managing unit that receives Msg1 and a D-SR managing unit that receives the D-SR. The RA managing unit associates a scheduling request with a preamble, and identifies a receiving device.

Drawings

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Drawings

Claims14

Dependent claims

A wireless communication system that performs wireless communication between a receiving device and a transmitting device using a plurality of radio carriers, the wireless communication system comprising:

the receiving device including:
a first random access managing unit that transmits a preamble, which is selected by the receiving device at random, through a random access channel of a first radio carrier among the plurality of radio carriers, for which an uplink synchronization between the receiving device and the transmitting device has not been obtained, wherein the preamble transmitted through the random access channel does not include information identifying the receiving device, and
a first scheduling request managing unit that transmits a scheduling request through a control channel of a second radio carrier among the plurality of radio carriers, for which an uplink synchronization between the receiving device and the transmitting device has been obtained, before or after the random access channel of the first radio carrier, through which the preamble is transmitted by the first random access managing unit, wherein the scheduling request transmitted through the control channel includes the information identifying the receiving device;
and
the transmitting device including:
a second random access managing unit that receives the preamble transmitted through the first radio carrier, and
a second scheduling request managing unit that receives the scheduling request through the second radio carrier from the receiving device,
wherein the second random access managing unit of the transmitting device determines that the receiving device that has transmitted the scheduling request received through the second radio carrier has also transmitted the preamble through the first radio carrier, when the scheduling request received through the second radio carrier is received before transmitting a response to the preamble.

5 more elements

A receiving device configured to receive data from a transmitting device using a plurality of radio carriers, the receiving device comprising:

a random access managing unit that transmits a preamble, which is selected by the receiving device at random, through a random access channel of a first radio carrier among the plurality of radio carriers, for which an uplink synchronization between the receiving device and the transmitting device has not been obtained, wherein the preamble transmitted through the random access channel does not include information identifying the receiving device;
and
a scheduling request managing unit that transmits a scheduling request through a control channel of a second radio carrier among the plurality of radio carriers, for which an uplink synchronization between the receiving device and the transmitting device has been obtained, before or after the random access channel of the first radio carrier, through which the preamble is transmitted by the random access managing unit,
wherein the scheduling request transmitted through the control channel includes information identifying the receiving device, and the receiving device that has transmitted the scheduling request received through the second radio carrier is determined to have also transmitted the preamble through the first radio carrier, when the scheduling request received through the second radio carrier is received before a response to the preamble is transmitted from the transmitting device.

1 more element

Dependencies are inferred from the claim text.

Description15,447 words

Summary894 words

#The present invention relates to a wireless communication system in which communication can be performed using a plurality of frequency carriers.

#As one of wireless communication methods according to a related art, there is data transmission based on random access. For example, in the mobile communication system, when uplink data is generated, a mobile station performs random access using a physical random access channel (PRACH), and requests a base station to permit uplink transmission. In the random access, when a plurality of mobile stations transmit the same preamble ID through the same PRACH, contention occurs. When contention occurs, the base station has a problem in detecting the PRACH, and it is finally difficult to detect whether or not the mobile station has performed the random access. Hereinafter, this random access is referred to as “contention-based random access.”

#Here, an operation of the contention-based random access according to a related art will be briefly described. For example, when uplink data is generated, the mobile station starts random access, and transmits a randomly selected preamble ID to the base station through Msg1 that is transmitted through the PRACH. Here, a plurality of mobile stations are assumed to transmit the same preamble ID through the same PRACH, and in this case, contention occurs. Then, the base station transmits a response to Msg1 through Msg2 together with, for example, a synchronisation signal or transmission grant for uplink communication. The mobile station acquires an uplink synchronisation timing through Msg2. Then, the mobile station transmits its own identifier through Msg3. Thereafter, the base station resolves the contention through Msg4. In other words, when an identifier of a mobile station is detected, Msg4 is transmitted to the corresponding mobile station to notify of the fact that the mobile station has won the contention. Then, after exchanging Msg1 to Msg4, the mobile station performs transmission and reception of data with the base station.

Brief description of the drawings55 figures

#FIG. 1 is a diagram illustrating a configuration example of a mobile station (a receiving device) in a wireless communication system.

#FIG. 2 is a diagram illustrating a configuration example of a base station (a transmitting device) in a wireless communication system.

#FIG. 3 is a diagram illustrating carrier aggregation.

Detailed description13,440 words

#Hereinafter, exemplary embodiments of a wireless communication system according to the present disclosure will be described in detail with reference to the accompanying drawings. The invention is not limited to the following embodiments.

#FIG. 1 is a diagram illustrating a configuration example of a mobile station (a receiving device) in a wireless communication system, and FIG. 2 is a diagram illustrating a configuration example of a base station (a transmitting device) in a wireless communication system.

#Referring to FIG. 1, the mobile station includes a transmitting/receiving unit 11, an uplink transmitting unit 12, a control unit 13 including a control plane unit 20 and a data plane unit 30, and an antenna 14. The transmitting/receiving unit 11 transmits or receives a wirelessly transmitted signal through the antenna 14. The uplink transmitting unit 12 performs a process of transmitting uplink transmission data (data, an acknowledgment response (ACK/NACK), or the like) based on control from the control unit 13.

Facts

Application

13/912,974Filed 7 Jun 2013 · continuation

Priority

10 Dec 2010

Published

US 2013/0272241 A117 Oct 2013

Granted

9 Oct 2018

Term ends

31 Oct 2031

Estimated · how

20 years from earliest known nonprovisional domestic filing plus recorded patent term adjustment, including 325 days of 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.

Classification5 codes

H04W 74/006
Transmission of channel access control information: in the downlink, i.e. towards the terminal
H04W 72/21
Control channels or signalling for resource management: in the uplink direction of a wireless link, i.e. towards the network
H04W 74/0833
Non-scheduled access, e.g. ALOHA: random access procedures, e.g. with 4-step access
H04W 74/0838
Random access procedures, e.g. with 4-step access: using contention-free random access [CFRA]

Timeline

10 Dec 2010Priority claimedParent application PCT/JP2,010/072,278
7 Jun 2013Application filedUS 13/912,974
10 Jun 2013Assigned to Fujitsu Limitedassignment of assignor's interest
17 Oct 2013PublishedUS 2013/0272241 A1
9 Oct 2018GrantedUS 10,098,147 B2
20 Nov 2018Assigned to Fujitsu Connected Technologies Limitedassignment of assignor's interest
19 Mar 2024Assigned to Fcnt Limitedchange of name
21 Mar 2024Assigned to Yamato Kanzai Limitedchange of name
26 Mar 2024Assigned to Lenovo (Singapore) Pte. Ltd.assignment of assignor's interest
12 Oct 2026TodayWithin its term
31 Oct 2031Term endsEstimated, includes 325 days of adjustment

Wireless communication system, receiving device, transmitting device, and wireless communication method

Life of this patent

Wireless communication system, receiving device, transmitting device, and wireless communication method

Life of this patent

Life of this patent

Abstract

Drawings

Drawings

Claims14

Description15,447 words

Drawings

Classification5 codes

Life of this patent

Description15,447 words