Device and system for transmitting multi-user MIMO control information
A technology for controlling information and multi-users, applied in transmission systems, radio transmission systems, electrical components, etc., can solve problems such as no discussion, achieve the effect of small impact and improve system performance
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Embodiment 1
[0056] In this embodiment, the base station adds the control information of the far user to the downlink control information of the near user and sends it to the near user, the near user blindly detects the PDCCH, solves the DCI to obtain the data scheduling information of the far user, and then uses the interference cancellation technology , to obtain the PDSCH information of the near user itself.
[0057] Base station side:
[0058] Determine the near user and far user for superposition coding according to the scheduling algorithm. The determination criteria include: the beamforming and precoding directions are the same, and the condition can also be added: maximize the metric of the debugging algorithm;
[0059] Sending notification signaling carrying the far user C-RNTI to the near user, the notification signaling may be RRC signaling (see embodiment 2), or RRC signaling+DCI (see embodiment 3);
[0060] Adding the data scheduling information of the far user to the downlin...
example 2
[0067] Example 2: Sending and receiving remote user C-RNTI through RRC signaling
[0068] For the UE in the connected state, the eNB determines the remote users who can use the superposition coding pairing according to the channel state information. The judgment criterion is: the beamforming / precoding direction is the same, and the metric (such as the total downlink rate) of the debugging algorithm is maximized The user is the remote user of this UE;
[0069] The UE obtains the remote user C-RNTI issued by the base station through the RRC connection reconfiguration message, that is, adds the remote user C-RNTI field in the RRC connection reconfiguration message, and the length is 16 bits;
[0070] After the UE obtains the C-RNTI of the far user, it can be used to decompose the data of the far user, thereby removing the interference of the data of the far user from the total received signal, and obtaining the downlink PDSCH of the UE.
Embodiment 3
[0071] Embodiment 3: The base station notifies a group of far user C-RNTI information list to the near user through the RRC connection reconfiguration message, and then dynamically delivers the currently superimposed far user C-RNTI index through the DCI carried by the PDCCH. Specifically include:
[0072] For a UE in the connected state, the eNB determines several remote user groups that can use superposition coding pairing according to its channel state information; the judgment criterion is: select users with the same beamforming / precoding direction as the remote user candidate group for this UE.
[0073] The UE obtains the C-RNTI list of the remote user candidate group through the RRC connection reconfiguration message, that is, adds a set of remote user C-RNTI lists in the RRC connection reconfiguration message, and the length of each C-RNTI is 16 bits.
[0074] After the UE obtains the far user C-RNTI list, each downlink data scheduling eNB will indicate one or more far ...
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