Radio system and methods for duplex operation

Abstract

A method for duplex telecommunication connection in radio connections is based on a frame-structured interactive communication and a radio system where the frame-structured interactive communication is performed in the radio connections. A means is provided for improving the use of channel resources in implementation of interactive telecommunication connection by providing an FDD connection with one or more TDD dimensions. A full-duplex frequency band is time-duplexed into two or more sub-bands in which interactive communication takes place substantially independently. Transmissions in different transmission directions in each sub-band occur at different times, but simultaneous transmission can occur in different sub-bands in different transmission directions. The message is received entirely in one transmission direction before it needs to be responded to in another transmission direction in a particular sub-band. The frequency band is utilized effectively for communication because transmission can be performed simultaneously in different sub-bands in the reverse transmission directions.

1. A method for implementing a duplex telecommunication connection in a radio connections based on interactive communication using data frames in a first transmission direction and in a reverse second transmission direction, each data frame comprising a plurality of frame addresses, and transmission capacity of each radio connection being variable by allocation of frame addresses to it, the method comprising:
 composing information of interactive communication in the first transmission direction based on information transmitted in at least two frame addresses of one previous frame in the second transmission direction,   forming the data frames in the first transmission direction and in the second transmission direction from at least two adjacent subframes, each subframe comprising at least two frame addresses,   allocating the subframes in the first and second transmission direction to each interactive communication in such a way that the subframe in the first transmission direction and a subframe in the second transmission direction with allocations to the same interactive communication do not overlap in time, but said subframes may overlap in time with subframes with allocations to another interactive communication.   
     
     
       2. The method of  claim 1 , wherein the interactive transmission includes an uplink transmission of a random access burst and a downlink transmission of an access grant message as a response. 
     
     
       3. The method of  claim 1 , wherein the interactive transmission includes data transmission in one direction and a data transmission acknowledgement in another transmission direction. 
     
     
       4. The method of  claim 1 , wherein communication occurs at several connection layers whose number corresponds to number of subframes. 
     
     
       5. A radio system providing a duplex telecommunication connection in a radio connection based on interactive communication using data frames in a first transmission direction and in a reverse second transmission direction, each data frame comprising a plurality of frame addresses, and properties of each radio connection being variable by allocation of frame addresses to it, wherein the system is arranged to
 compose information of interactive communication in the first transmission direction based on information transmitted in at least one previous frame in the second transmission direction,   form the data frames in the first transmission direction and in the second transmission direction from at least two time-adjacent subframes, each subframe comprising at least two frame addresses,   allocate the subframes in said first and second transmission direction to each interactive communication in such a way that the subframe in the first transmission direction and a subframe in the second transmission direction allocated with allocations to the same interactive communication do not overlap in time, but said subframes may overlap in time with subframes with allocations to another interactive communication.   
     
     
       6. The radio system of  claim 5  wherein the interactive transmission includes uplink transmission of a random access burst and downlink transmission of an access grant message as a response. 
     
     
       7. The radio system of  claim 5  wherein the interactive transmission comprises data transmission in one direction and a data transmission acknowledgement in another transmission direction. 
     
     
       8. The radio system of  claim 5  wherein communication occurs at several connection layers whose number corresponds to a number of sub-bands. 
     
     
       9. The method of  claim 1  wherein the interactive transmission includes an uplink transmission of a random access burst and a downlink transmission of an access grant message as a response. 
     
     
       10. The method of  claim 1  wherein the interactive transmission includes data transmission in one direction and a data transmission acknowledgement in another transmission direction. 
     
     
       11. The method of  claim 1  wherein communication occurs at several connection layers whose number corresponds to a number of subframes. 
     
     
       12. The method of  claim 1  wherein the duration of a message of said interactive communication corresponds with the cycle of the data frame it is allocated to. 
     
     
       13. The method of  claim 1  wherein the data transmission capacity of said radio communication varies corresponding to the number of frame addresses allocated to it. 
     
     
       14. A method for communication comprising:
 transmitting a request message in a first frame of a series of frames;   receiving an acknowledgement of the request message;   transmitting data in accordance with the acknowledgement in a second frame of the series of frames,   the first and second frames being next to one another in the series,   the first frame comprising a plurality of frame addresses, the frame addresses being divided among the plurality of the subframes, wherein the request message uses one or more frame addresses of a subframe of the plurality of subframes;   the second frame comprising the plurality of frame addresses repeated from the first frame, the frame addresses being divided among the plurality of subframes, wherein the data uses one or more frame addresses of a subframe of the plurality of subframes;   wherein the receiving step is performed, prior to the one or more frame addresses used by the request message being repeated in the second frame.   
     
     
       15. The method of claim 14 wherein the acknowledgment is in the middle of a third frame that is not part of the series of frames. 
     
     
       16. The method of claim 14, wherein the first and second frames are uplink frames. 
     
     
       17. The method of claim 16, wherein the is received in a third frame that is a downlink frame. 
     
     
       18. The method of claim 17 wherein the first and second frames are transmitted by a mobile unit and the third frame is received from a base station. 
     
     
       19. The method of claim 14, wherein the acknowledgement indicates that one or more frame addresses in an uplink direction are available. 
     
     
       20. A method for communication comprising:
 receiving, in a downlink direction, a message in a first downlink frame comprising a plurality of frame addresses, the plurality of frame addresses being divided into a first subframe and a second subframe the first subframe including the message, the message identifying which uplink frame address or addresses are free;   transmitting, in an uplink direction, a request message in a first uplink frame comprising a plurality of frame addresses, the plurality of frame addresses being divided into a first subframe and a second subframe, the second subframe including the request message, the request message requesting one or more of the identified uplink frame address or addresses, the request message occupying one or more frame addresses of the second subframe;   receiving, in the downlink direction, an allocation message in a second downlink frame comprising a plurality of frame addresses, the plurality of frame addresses being divided into a first subframe and a second subframe, the first subframe including the allocation message, the allocation message allocating the requested uplink frame address or addresses, the first subframe being received prior to the recurrence of the one or more frame addresses occupied by the request message; and   transmitting, in the uplink direction, data in a second uplink frame comprising a plurality of frame addresses, the plurality of frame addresses being divided into a first subframe and a second subframe, the second subframe including the data within the allocated frame address or addresses,   wherein the first and second downlink frames are next to one another in a series of downlink frames and the first and second uplink frames are next to one another in a series of downlink frames.   
     
     
       21. The method of claim 20, wherein the message identifying which uplink frame address or addresses are free is a Yell message. 
     
     
       22. The method of claim 20, wherein the request message is a RACH message. 
     
     
       23. The method of claim 20, wherein the allocation message is an access grant message. 
     
     
       24. The method of claim 20, wherein the allocated frame address or addresses constitute a data channel. 
     
     
       25. A method for communication comprising:
 transmitting, in an uplink direction, data in a first uplink frame comprising a plurality of frame addresses, the plurality of frame addresses being divided into a first subframe and a second subframe, the second subframe including the data on an allocated channel, the allocated channel occupying one or more frame addresses of the second subframe;   receiving, in a downlink direction, a message in a downlink frame comprising a plurality of frame addresses, the plurality of frame addresses being divided into a first subframe and a second subframe, the first subframe including a message indicating that the data has not been received, the first subframe being received prior to the recurrence of the one or more frame addresses used by the allocated channel; and   transmitting, in the uplink direction, data in a second uplink frame comprising a plurality of frame addresses, the plurality of frame addresses being divided into a first subframe and a second subframe, the second subframe including a repetition of the data on the allocated channel.   
     
     
       26. A method for communication comprising:
 transmitting, in an uplink direction, data in a first uplink frame comprising a plurality of frame addresses, the plurality of frame addresses being divided into a first subframe and a second subframe, the second subframe including the data on an allocated channel, the allocated channel occupying one or more frame addresses of the second subframe;   receiving, in a downlink direction, a message in a downlink frame comprising a plurality of frame addresses, the plurality of frame addresses being divided into a first subframe and a second subframe, the first subframe including a message acknowledging the data, the first subframe being received prior to the recurrence of the one or more frame addresses used by the allocated channel; and   releasing the allocated channel for use in a second uplink frame immediately following the first uplink frame, the frame addresses of the allocated channel being available for use prior to their recurrence in the second uplink frame.