Method and system for signaling transmission layers for single user and multi user MIMO
A method and system to signal transmission layers or dedicated reference signal ports to be used in a multiple input multiple output system, the method including providing a downlink control signal containing information for transmission layers or dedicated reference signal ports utilized, the dedicated reference signal ports being associated with the transmission layers; and using the information to demodulate data on each transmission layer.
1. A method performed by a network element of a multiple input multiple output ‘MIMO’ system, the method comprising:
transmitting information regarding transport blocks to be utilized by a user equipment ‘UE’ and regarding dedicated reference signal ports to be utilized by the UE, the information further comprising an index value;
wherein if the information signifies that one transport block is used, a first set of layer combinations or associated combinations of dedicated reference signal ports is selected,
wherein if the information signifies that two transport blocks are used, a second set of layer combinations or associated combinations of dedicated reference signal ports is selected; and
wherein a layer combination or associated combination of dedicated reference signal ports to be utilized by the UE is uniquely determined from the selected set of layer combinations or associated combinations of dedicated reference signal ports and the index value.
2. The method of claim 1 wherein the information supports multiple-user MIMO transmissions.
3. The method of claim 1 wherein a scrambling code is associated with the index value.
4. The method of claim 1 wherein the network element is an eNodeB capable of at least one of long term evolution ‘LTE’ operations and LTE-advanced operations.
5. A network element of a multiple input multiple output ‘MIMO’ system, comprising:
a processor configured to execute instructions that cause transmission of information regarding transport blocks to be utilized by a user equipment ‘UE’ and regarding dedicated reference signal ports to be utilized by the UE, the information further comprising an index value;
wherein if the information signifies that one transport block is used, a first set of layer combinations or associated combinations of dedicated reference signal ports is selected,
wherein if the information signifies that two transport blocks are used, a second set of layer combinations or associated combinations of dedicated reference signal ports is selected;
and wherein a layer combination or associated combination of dedicated reference signal ports to be utilized by the UE is uniquely determined from the selected set of layer combinations or associated combinations of dedicated reference signal ports and the index value.
6. The network element of claim 5 wherein the information supports multiple-user MIMO transmissions.
7. The network element of claim 5 wherein a scrambling code is associated with the index value.
8. The network element of claim 5 wherein the network element is an eNodeB capable of at least one of long term evolution ‘LTE’ operations and LTE-advanced operations.
9. A non-transitory computer-readable medium storing instructions which, when executed by a processor of a network element, cause the processor to:
transmit information regarding transport blocks to be utilized by a user equipment ‘UE’ and regarding dedicated reference signal ports to be utilized by the UE, the information further comprising an index value;
wherein if the information signifies that one transport block is used, a first set of layer combinations or associated combinations of dedicated reference signal ports is selected,
wherein if the information signifies that two transport blocks are used, a second set of layer combinations or associated combinations of dedicated reference signal ports is selected; and
wherein a layer combination or associated combination of dedicated reference signal ports to be utilized by the UE is uniquely determined from the selected set of layer combinations or associated combinations of dedicated reference signal ports and the index value.
10. The non-transitory computer-readable medium of claim 9 wherein the information supports multiple-user MIMO transmissions.
11. The non-transitory computer-readable medium of claim 9 wherein a scrambling code is associated with the index value.
12. The non-transitory computer-readable medium of claim 9 wherein the network element is an eNodeB capable of at least one of long term evolution ‘LTE’ operations and LTE-advanced operations.
13. A user equipment ‘UE’ comprising:
a processor configured to execute instructions that cause the UE to:
receive information regarding transport blocks to be utilized and regarding dedicated reference signal ports to be utilized, the information further comprising an index value;
wherein if the information signifies that one transport block is used, a first set of layer combinations or associated combinations of dedicated reference signal ports is selected,
wherein if the information signifies that two transport blocks are used, a second set of layer combinations or associated combinations of dedicated reference signal ports is selected; and
uniquely determine a layer combination or associated combination of dedicated reference signal ports to be utilized by the UE from the selected set of layer combinations or associated combinations of dedicated reference signal ports and the index value.
14. The UE of claim 13 wherein the information supports multiple-user MIMO transmissions.
15. The UE of claim 13 wherein a scrambling code is associated with the index value.
16. The UE of claim 13 wherein the instructions cause the UE to perform the receipt of the information during at least one of long term evolution ‘LTE’ operations and LTE-advanced operations.
17. The UE of claim 13 wherein the instructions further cause the UE to utilize at least one of said transport blocks and said dedicated reference signal ports based on the information.
18. A method performed at a user equipment of a multiple input multiple output ‘MIMO’ system, the method comprising:
receiving information regarding transport blocks to be utilized and regarding dedicated reference signal ports to be utilized, the information further comprising an index value;
wherein if the information signifies that one transport block is used, a first set of layer combinations or associated combinations of dedicated reference signal ports is selected,
wherein if the information signifies that two transport blocks are used, a second set of layer combinations or associated combinations of dedicated reference signal ports is selected; and
uniquely determining a layer combination or associated combination of dedicated reference signal ports to be utilized by the UE from the selected set of layer combinations or associated combinations of dedicated reference signal ports and the index value.
19. A non-transitory computer-readable medium storing instructions which, when executed by a processor of a user equipment (UE), cause the processor to:
receive information regarding transport blocks to be utilized and regarding dedicated reference signal ports to be utilized, the information further comprising an index value;
wherein if the information signifies that one transport block is used, a first set of layer combinations or associated combinations of dedicated reference signal ports is selected,
wherein if the information signifies that two transport blocks are used, a second set of layer combinations or associated combinations of dedicated reference signal ports is selected; and
uniquely determine a layer combination or associated combination of dedicated reference signal ports to be utilized by the UE from the selected set of layer combinations or associated combinations of dedicated reference signal ports and the index value.