BASE STATION DEVICE, MOBILE STATION DEVICE, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD

• US 20130250863A1
• Filed: 05/29/2013
• Published: 09/26/2013
• 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: AIBA, Tatsushi, YAMADA, Shohei, UEMURA, Katsunari, SUZUKI, Shoichi, NOGAMI, Toshizo, TSUBOI, Hidekazu, NAKASHIMA, Daiichiro
• Granted Patent: US 9,456,430 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• 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 communication system which performs communication between a base station device configuring at least one cell and a mobile station device, wherein: the base station device includes: a synchronization signal generation unit which generates a synchronization signal corresponding to a cell identity for identifying a cell; and a transmission unit which generates a first transmission signal including the synchronization signal using a first parameter obtained from the cell identity, generates a second transmission signal excluding the synchronization signal using a second parameter obtained from a virtual cell identity different from the cell identity, transmits the first transmission signal using a first frequency band, and transmits the second transmission signal via a second frequency band different from the first frequency band. The mobile station device includes: a reception unit which receives a first reception signal including the synchronization signal using the first parameter obtained from the cell identity via the first frequency band and receives a second reception signal using the second parameter obtained from the virtual cell identity via the second frequency band.

Claims

1. A base station device which communicates with a mobile station device, the base station device comprising:

a synchronization signal generation unit configured to generate a synchronization signal corresponding to a first cell identity for identifying a cell; and

a data control unit configured to 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 different from the first cell identity; and

a transmission unit configured to transmit the first transmission signal via a first frequency band, and transmit the second transmission signal via a second frequency band different from the first frequency band.

2. The base station device according to claim 1, wherein the data control unit is configured to generate the second transmission signal not including a synchronization signal.

3. The base station device according to claim 1, wherein the data control unit is configured to generate the first transmission signal including an information indicating the second cell identity.

4. The base station device according to claim 3, wherein the information indicating the second cell identity is included upper-layer control information that is control information of an upper layer.

5. The base station device according to claim 1, wherein the data control unit is configured to map the first reference signal to a position obtained based on the first cell identity and map the second reference signal to a position obtained based on the second cell identity.

6. The base station device according to claim 1, wherein the data control unit is configured to scramble the first physical channel based on the first cell identity and scramble the second physical channel based on the second cell identity.

7. The base station device according to claim 6, wherein the first physical channel and the second physical channel includes at least one of physical broadcast channel, physical control channel and physical shared channel.

8. A mobile station device which communicates with a base station device, the mobile station device comprising:

a reception unit configured to receive a first reception signal via a first frequency band and receive the second reception signal via a second frequency band different from the first frequency band, wherein the first reception signal includes a synchronization signal, a first physical channel and a first reference signal, wherein the first physical channel and the first reference signal are obtained from the first cell identity, and

the second reception signal includes a second physical channel and a second reference signal, wherein the second physical channel and the second reference signal are obtained from a second cell identity different from the first cell identity.

9. The mobile station device according to claim 8, wherein the second reception signal does not include a synchronization signal.

10. The mobile station device according to claim 8, further comprising a data extraction unit,

wherein the data extraction unit is configured to extract information indicating the second cell identity from the first reception signal.

11. The mobile station device according to claim 10, further comprising a radio resource control unit,

wherein the radio resource control unit is configured to acquire information indicating the second cell identity from upper-layer control information.

12. The mobile station device according to claim 8, further comprising a data extraction unit,

wherein the data extraction unit is configured to extract the first physical channel based on the first cell identity and extract the second physical channel based on the second cell identity.

13. The mobile station device according to claim 8, wherein the reception unit configured to extract the first reception signal based on a position obtained from the first cell identity and extract the second reception signal based on a position obtained from the second cell identity.

14. The mobile station device according to claim 8, further comprising a data extraction unit,

wherein the data extraction unit is configured to extract the first reception signal based on a sequence obtained from the first cell identity and extract the second reception signal based on a sequence obtained from the second cell identity.

15. The mobile station device according to claim 10, wherein the data extraction unit configured to descramble the first physical channel based on the first cell identity and descramble the second physical channel based on the second cell identity.

16. The mobile station device according to claim 8, further comprising:

a mobile station-related reference signal generation configured to generate a third reference signal based on the first cell identity and generate a fourth reference signal based on the second cell identity; and

a mobile station-transmission unit configured to transmit a signal including the third reference signal via a third frequency band corresponding to the first frequency band and transmit a signal including the fourth reference signal via a fourth frequency band corresponding to the second frequency band.

17. A communication system comprising:

a base station device; and

a mobile station device, wherein;

the base station device and the mobile station device are configured to communicate with each other,

the base station device comprises;

a synchronization signal generation unit configured to generate a synchronization signal corresponding to a first cell identity for identifying a cell; and

a data control unit configured to 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 different from the first cell identity; and

a transmission unit configured to transmit the first transmission signal via a first frequency band, and transmit the second transmission signal via a second frequency band different from the first frequency band, and

the mobile station device comprises;

a reception unit configured to receive a first reception signal via a first frequency band and receive the second reception signal via a second frequency band different from the first frequency band, wherein the first reception signal includes a synchronization signal, a first physical channel and a first reference signal, wherein the first physical channel and the first reference signal are obtained from the first cell identity and

the second reception signal includes a second physical channel and a second reference signal, wherein the second physical channel and the second reference signal are obtained from a second cell identity different from the first cell identity.

18. A communication method for use in a communication system configured to perform communication between a base station device and a mobile station device, the communication method comprising:

generating a synchronization signal corresponding to a first cell identity for identifying a cell; and

generating 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 generating 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 different from the first cell identity; and

transmitting the first transmission signal via a first frequency band, and transmitting the second transmission signal via a second frequency band different from the first frequency band; and

receiving a first reception signal via a first frequency band and receiving the second reception signal via a second frequency band different from the first frequency band,

wherein the first reception signal includes a synchronization signal, a first physical channel and a first reference signal, wherein the first physical channel and the first reference signal are obtained from the first cell identity, and

the second reception signal includes a second physical channel and a second reference signal, and wherein the second physical channel and the second reference signal are obtained from a second cell identity different from the first cell identity.