IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0030920
(2005-01-06)
|
등록번호 |
US-7436809
(2008-10-14)
|
우선권정보 |
JP-2004-063984(2004-03-08) |
발명자
/ 주소 |
- Harada,Hiroshi
- Ahn,Chang Jun
- Takahashi,Satoshi
- Kamio,Yukiyoshi
- Sampei,Seiichi
|
출원인 / 주소 |
- National Institute of Information and Communications Technology, Incorporated Administrative Agency
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
8 인용 특허 :
7 |
초록
▼
A communicating system is disclosed. The communicating system has a base station and a plurality of mobile stations that radio-communicate through an uplink channel and a downlink channel with frames each of which is composed of a plurality of time divided slots, each of the frames of the uplink cha
A communicating system is disclosed. The communicating system has a base station and a plurality of mobile stations that radio-communicate through an uplink channel and a downlink channel with frames each of which is composed of a plurality of time divided slots, each of the frames of the uplink channel and the downlink channel being transmitted in accordance with OFDM transmitting system. An OFDM sub carrier used in the OFDM transmitting system is divided in accordance with a predetermined diving method, each of the frames of the uplink channel or downlink channel being allocated to the divided portions of the OFDM sub carrier, a plurality of frames of the uplink channel or downlink channel being radio-communicated between one base station and a plurality of mobile stations.
대표청구항
▼
The invention claimed is: 1. A communicating system having a base station and a plurality of mobile stations that radio-communicate through an uplink channel and a downlink channel with frames each of which is composed of a plurality of time divided slots, each of the frames of the uplink channel a
The invention claimed is: 1. A communicating system having a base station and a plurality of mobile stations that radio-communicate through an uplink channel and a downlink channel with frames each of which is composed of a plurality of time divided slots, each of the frames of the uplink channel and the downlink channel being transmitted in accordance with OFDM transmitting system, an OFDM sub carrier used in the OFDM transmitting system being divided, each of the frames of the uplink channel and the downlink channel being allocated to the divided portions of the OFDM sub carrier to form a plurality of sub channels that are independent from each other, a plurality of frames of the uplink channel and downlink channel being radio-communicated between one base station and the plurality of mobile stations through the sub channels, a frame control message slot (FCMS) being allocated to each frame of the sub channel of the downlink channel, slot allocation information of the uplink channel, slot allocation information of the downlink channel, response information against data transmitted through the uplink channel, response information against connection setup--connection release request transmitted from one of the mobile stations, and response information against registration--deregistration request transmitted from one of the mobile stations being transmitted from the base station to one of the mobile stations with the frame control message slot, an activation slot (ACTS) being allocated to each frame of the sub channel of the uplink channel, the connection setup--connection release request and the registration--deregistration request transmitted from one of the mobile stations being transmitted from one of the mobile stations to the base station with the activation slot (ACTS), one of the mobile stations receiving all the divided portions of the OFDM sub carrier transmitted in accordance with the OFDM transmission system from the base station through the downlink channel, the frame message control slot allocated to all the received sub channels being received, the allocated information of the frames of the uplink and downlink channels being received, an available one of the sub channels being determinable based on the allocated information, a registration request being performed for the activation slot of the available sub channel, a communication being performed with the frames of the uplink and the downlink channels allocated to the sub channel that has been registered. 2. The communicating system as set forth in claim 1, wherein download request, upload request, and user data transmitted from one of the mobile stations and response information against data transmitted through the downlink channel are transmitted from one of the mobile stations to the base station with a message data slot (MDS) allocated in a frame of the uplink channel, the frame being transmitted with the sub channels. 3. The communicating system as set forth in claim 1, wherein when the base station receives the download request from the plurality of mobile stations through the uplink channel, the slots of the downlink channel and the slots of the uplink channel are allocated to the plurality of mobile stations in accordance with a predetermined rule. 4. The communicating system as set forth in claim 3, wherein the predetermined rule is one of the round robin method, the FIFO method, and the modified FIFO method. 5. The communicating system as set forth in claim 1, wherein when the base station and each of the plurality of mobile stations transmit data, the modulating system and the transmission power can be selected for each slot of the uplink channel and the downlink channel. 6. The communicating system as set forth in claim 1, wherein the slots of each frame allocated to the divided portions of the OFDM sub carrier and transmitted through the downlink channel are independent from those through the downlink channel. 7. A communicating method of a base station and a plurality of mobile stations that radio-communicate through an uplink channel and a downlink channel with frames each of which is composed of a plurality of time divided slots, each of the frames of the uplink channel and the downlink channel being transmitted in accordance with OFDM transmitting system, an OFDM sub carrier used in the OFDM transmitting system being divided, each of the frames of the uplink channel and the downlink channel being allocated to the divided portions of the OFDM sub carrier to form a plurality of sub channels that are independent from each other, a plurality of frames of the uplink channel and downlink channel being radio-communicated between one base station and the plurality of mobile stations through the sub channels, comprising the steps of: transmitting slot allocation information of the uplink channel, slot allocation information of the downlink channel, response information against data transmitted through the uplink channel, response information against connection setup--connection release request transmitted from one of the mobile stations, and response information against registration--deregistration request transmitted from one of the mobile stations from the base station to one of the mobile stations with the frame control message slot; allocating an activation slot (ACTS) to each frame of the sub channel of the uplink channel; transmitting the connection setup--connection release request and the registration--deregistration request transmitted from one of the mobile stations to the base station with the activation slot (ACTS); causing one of the mobile stations to receive all the divided portions of the OFDM sub carrier transmitted in accordance with the OFDM transmission system from the base station through the downlink channel; receiving the frame message control slot allocated to all the received sub channels and the allocated information of the frames of the uplink and downlink channels and determining an available one of the sub channels based on the allocated information; and performing a registration request for the activation slot of the available sub channel and communicating with the frames of the uplink and the downlink channels allocated to the sub channel that has been registered. 8. The communicating method as set forth in claim 7, wherein download request, upload request, and user data transmitted from one of the mobile stations and response information against data transmitted through the downlink channel are transmitted from one of the mobile stations to the base stations with a message data slot (MDS) allocated in a frame of the uplink channel, the frame being transmitted with the sub channels. 9. The communicating method as set forth in claim 7, wherein when the base station receives the download request from the plurality of mobile stations through the uplink channel, the slots of the downlink channel and the slots of the uplink channel are allocated to the plurality of mobile stations in accordance with a predetermined rule. 10. The communicating method as set forth in claim 9, wherein the predetermined rule is one of the round robin method, the FIFO method, and the modified FIFO method. 11. The communicating method as set forth in claim 9, wherein when the base station and each of the plurality of mobile stations transmit data, the modulating system and the transmission power can be selected for each slot of the uplink channel and the downlink channel. 12. The communicating method as set forth in claim 9, wherein the slots of each frame allocated to the divided portions of the OFDM sub carrier and transmitted through the downlink channel are independent from those through the downlink channel. 13. A base station in a communicating system having a base station and a plurality of mobile stations that radio-communicate through an uplink channel and a downlink channel with frames each of which is composed of a plurality of time divided slots, each of the frames of the uplink channel and the downlink channel being transmitted in accordance with OFDM transmitting system, an OFDM sub carrier used in the OFDM transmitting system being divided, each of the frames of the uplink channel and the downlink channel being allocated to the divided portions of the OFDM sub carrier to form a plurality of sub channels that are independent from each other, a plurality of frames of the uplink channel and downlink channel being radio-communicated between one base station and the plurality of mobile stations through the sub channels, a frame control message slot (FCMS) being allocated to each frame of the sub channel of the downlink channel, slot allocation information of the uplink channel, slot allocation information of the downlink channel, response information against data transmitted through the uplink channel, response information against connection setup--connection release request transmitted from one of the mobile stations, and response information against registration--deregistration request transmitted from one of the mobile stations being transmitted from the base station to one of the mobile stations with the frame control message slot, an activation slot (ACTS) being allocated to each frame of the sub channel of the uplink channel, the connection setup--connection release request and the registration--deregistration request transmitted from one of the mobile stations being transmitted from one of the mobile stations to the base station with the activation slot (ACTS), one of the mobile stations receiving all the divided portions of the OFDM sub carrier transmitted in accordance with the OFDM transmission system from the base station through the downlink channel, the frame message control slot allocated to all the received sub channels being received, the allocated information of the frames of the uplink and downlink channels being received, an available one of the sub channels being determinable based on the allocated information, a registration request being performed for the activation slot of the available sub channel, a communication being performed with the frames of the uplink and the downlink channels allocated to the sub channel that has been registered. 14. The base station as set forth in claim 13, wherein download request, upload request, and user data transmitted from one of the mobile stations and response information against data transmitted through the downlink channel are transmitted from one of the mobile stations to the base station with a message data slot (MDS) allocated in a frame of the uplink channel, the frame being transmitted with the sub channels. 15. The base station as set forth in claim 13, wherein when the download request is received from the plurality of mobile stations through the uplink channel, the slots of the downlink channel and the slots of the uplink channel are allocated to the plurality of mobile stations in accordance with a predetermined rule. 16. The base station as set forth in claim 15, wherein the predetermined rule is one of the round robin method, the FIFO method, and the modified FIFO method. 17. The base station as set forth in claim 13, wherein when data are transmitted, the modulating system and the transmission power can be selected for each slot of the uplink channel and the downlink channel. 18. The base station as set forth in claim 13, wherein the slots of each frame allocated to the divided portions of the OFDM sub carrier and transmitted through the downlink channel are independent from those through the downlink channel. 19. A mobile station in a communicating system having a base station and a plurality of mobile stations that radio-communicate through an uplink channel and a downlink channel with frames each of which is composed of a plurality of time divided slots, each of the frames of the uplink channel and the downlink channel being transmitted in accordance with OFDM transmitting system, an OFDM sub carrier used in the OFDM transmitting system being divided, each of the frames of the uplink channel and the downlink channel being allocated to the divided portions of the OFDM sub carrier to form a plurality of sub channels that are independent from each other, a plurality of frames of the uplink channel and downlink channel being radio-communicated between one base station and the plurality of mobile stations through the sub channels, a frame control message slot (FCMS) being allocated to each frame of the sub channel of the downlink channel, slot allocation information of the unlink channel, slot allocation information of the downlink channel, response information against data transmitted through the uplink channel, response information against connection setup--connection release request transmitted from one of the mobile stations, and response information against registration-- deregistration request transmitted from one of the mobile stations being transmitted from the base station to one of the mobile stations with the frame control message slot, an activation slot (ACTS) being allocated to each frame of the sub channel of the uplink channel, the connection setup--connection release request and the registration--deregistration request transmitted from one of the mobile stations being transmitted to the base station with the activation slot (ACTS), all the divided portions of the OFDM sub carrier transmitted in accordance with the OFDM transmission system being received from the base station through the downlink channel, the frame message control slot allocated to all the received sub channels being received, the allocated information of the frames of the uplink and downlink channels being received, an available one of the sub channels being determinable based on the allocated information, a registration request being performed for the activation slot of the available sub channel, a communication being performed with the frames of the uplink and the downlink channels allocated to the sub channel that has been registered. 20. The mobile station as set forth in claim 19, wherein download request, upload request, and user data and response information against data transmitted through the downlink channel are transmitted to the base station with a message data slot (MDS) allocated in a frame of the uplink channel, the frame being transmitted with the sub channels. 21. The mobile station as set forth in claim 19, wherein when data are transmitted, the modulating system and the transmission power can be selected for each slot of the uplink channel and the downlink channel.
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