Base station device, mobile station device, communication system, and communication method

• US 10,264,536 B2
• Filed: 08/31/2016
• Issued: 04/16/2019
• Est. Priority Date: 12/26/2008
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Nogami, Toshizo, Aiba, Tatsushi, Yamada, Shohei, Tsuboi, Hidekazu, Uemura, Katsunari, Nakashima, Daiichiro, Suzuki, Shoichi
• Primary Examiner(s): Wei, Siren
• Application Number:
  US15/252,589
• Publication Number:
  US 20160374033A1
• Time in Patent Office: 958 Days
• CPC Class Codes: H04J 11/0069 Cell search, i.e. determining cell identity [cell-ID] design of multiplexing codes H04J13/00; processing access restriction or access information H04W48/16; discovery of network devices for network data management H04W8/005; sounding signals for channel estimation H04L25/0226; structure of reference signals in multicarrier modulation systems H04L27/2613; frame, time or carrier synchronisation in multicarrier modulation systems H04L27/2655
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 56/00 Synchronisation arrangements
• CPC Class Codes: H04W 76/10 Connection setup

Abstract

A mobile station (MS) receives a first reception signal using a first downlink component carrier (DCC) and receives a second reception signal using the second DCC. The first reception signal includes a synchronization signal, a first physical channel, and a first reference signal. The first physical channel and the first reference signal are obtained using a first cell identity. The second reception signal includes a second physical channel and a second reference signal. The second physical channel and the second reference signal are obtained using a second cell identity. The MS acquires information relating the second cell identity, the information being carried by the first reception signal. The MS extracts the information from the first reception signal carried after the mobile station establishes connection in a first cell via a cell search using the synchronization signal. The second DCC is used simultaneously with the first DCC.

Claims

1. A base station device configured to communicate with a mobile station device by carrier aggregation using a first downlink component carrier and a second downlink component carrier, the base station device comprising:

data control circuitry configured to

generate a synchronization signal corresponding to a first cell identity,

generate a first transmission signal including the synchronization signal, a first physical channel, and a first reference signal, wherein the first physical channel and the first reference signal are generated based on the first cell identity, and

generate a second transmission signal including a second physical channel and a second reference signal, wherein the second physical channel and the second reference signal are generated based on a second cell identity;

upper layer circuitry configured to, after the mobile station device establishes connection in a first cell corresponding to the first cell identity, start to send information indicating the second cell identity by using radio resource control (RRC) signaling dedicated to the mobile station device, the information being carried by the first transmission signal; and

transmission circuitry configured to

transmit the first transmission signal using the first downlink component carrier, and

transmit the second transmission signal using the second downlink component carrier, wherein

the second downlink component carrier is used with the first downlink component carrier.

2. A mobile station device configured to communicate with a base station device by carrier aggregation using a first downlink component carrier and a second downlink component carrier, the mobile station device comprising:

reception circuitry configured to

receive a first reception signal using the first downlink component carrier, and

receive a second reception signal using the second downlink component carrier, wherein

the first reception signal includes a synchronization signal, a first physical channel, and a first reference signal,

the first physical channel and the first reference signal are obtained using a first cell identity,

the second reception signal includes a second physical channel and a second reference signal, and

the second physical channel and the second reference signal are obtained using a second cell identity, and

upper layer circuitry configured to acquire information indicating the second cell identity by using radio resource control (RRC) signaling dedicated to the mobile station device, the information starting to be carried by the first reception signal after the mobile station device establishes connection in a first cell corresponding to the first cell identity; and

data extraction circuitry configured to extract the information from the first reception signal, wherein

the second downlink component carrier is used with the first downlink component carrier.

3. A communication method for use in a mobile station device configured to perform communication with a base station device by carrier aggregation using a first downlink component carrier and a second downlink component carrier, the communication method comprising:

receiving a first reception signal using the first downlink component carrier and receiving a second reception signal using the second downlink component carrier, wherein

the first reception signal includes a synchronization signal, a first physical channel,

the first physical channel and the first reference signal are obtained using a first cell identity,

the second reception signal includes a second physical channel and a second reference signal, and

the second physical channel and the second reference signal are obtained using a second cell identity;

acquiring information indicating the second cell identity by using radio resource control (RRC) signaling dedicated to the mobile station device, the information starting to be carried by the first reception signal after the mobile station device establishes connection in a first cell corresponding to the first cell identity; and

extracting the information from the first reception signal, wherein

the second downlink component carrier is used with the first downlink component carrier.