Optimized signalling of scheduling decisions
A method, terminal device, network element, and computer program product for signalling a scheduling information used for indicating resource allocation states of a plurality of available resource blocks to a plurality of scheduled devices are disclosed, wherein a resource allocation state is set for each of the available resource blocks and multiplied by the number of possible allocation states to the power of a sequential number of the resource block. Then, the multiplication results of all available resource blocks are summed and the summing result is transmitted to the plurality of scheduled devices. Thereby, the required amount of signalling bits can be reduced considerably, while still maintaining the same signalling content.
1 . A method of signalling a scheduling information used for indicating resource allocation states of a plurality of available resource blocks to a plurality of scheduled devices, said method comprising:
setting a resource allocation state for each of said available resource blocks;
multiplying a value of a resource allocation state of a resource block by the number of possible allocation states to the power of a sequential number of said resource block, said sequential number starting from the value “0”;
performing the step of multiplying for all available resource blocks;
summing all multiplication results; and
transmitting the summing result to said plurality of scheduled devices.
2 . A method according to claim 1 , wherein said number of possible resource allocation states is 3.
3 . A method according to claim 1 , wherein said value of said resource allocation state is selected from the values 0, 1, and 2.
4 . A method according to claim 1 , wherein said possible resource allocation states comprise a first state indicating that a related resource block has not been allocated to a user, a second state indicating that the related resource block has been allocated to a user and is used for localized transmission, and a third state indicating that the related resource block has been allocated to a user and is used for distributed transmission.
5 . A method according to claim 1 , wherein said resource block is a frequency resource block of an orthogonal frequency division multiplexing system.
6 . A method according to claim 1 , wherein said scheduling information is used to compress a fixed-length part of an allocation table.
7 . A method according to claim 6 , wherein said fixed length part comprises a set of resource block type indicator bits and a set of entry existence indicator bits.
8 . A network element for signalling a scheduling information used for indicating resource allocation states of a plurality of available resource blocks to a plurality of scheduled devices, said network element comprising encoding means configured:
to set a resource allocation state for each of said available resource blocks;
to multiply a value of a resource allocation state of a resource block ( 50 ) by the number of possible allocation states to the power of a sequential number of said resource block, said sequential number starting from the value “0”;
to perform the step of multiplying for all available resource blocks;
to sum all multiplication results; and
to transmit the summing result to said plurality of scheduled devices.
9 . A network element according to claim 8 , wherein said number of possible resource allocation states is 3.
10 . A network element according to claim 8 , wherein said network element is configured to select said value of said resource allocation state from the values 0, 1, and 2.
11 . A network element according to claim 8 , wherein said network element is configured set said resource allocation states to one of a first state indicating that a related resource block has not been allocated to a user, a second state indicating that the related resource block has been allocated to a user and is used for localized transmission, and a third state indicating that the related resource block has been allocated to a user and is used for distributed transmission.
12 . A network element according to claim 8 , wherein said resource block is a frequency resource block of an orthogonal frequency division multiplexing system.
13 . A network element according to claim 8 , wherein said network element is configured to use said scheduling information to compress a fixed-length part of an allocation table.
14 . A network element according to claim 13 , wherein said fixed length part comprises a set of resource block type indicator bits and a set of entry existence indicator bits.
15 . A terminal device comprising decoding means for decoding a scheduling information signaled by a method according to claim 1 .
16 . A computer program product comprising code means for generating the steps of method claim 1 when run on a computer device.
17 . A system for signalling a scheduling information for indicating resource allocation states of a plurality of available resource blocks to a plurality of scheduled devices, said system comprising a network element according to claim 8 , and a terminal device according to claim 15 .