Communication method and system for coexistence of d2d communication and cellular communication in multi-antenna scenario
A technology of cellular communication and communication method, which is applied in wireless communication, network planning, network traffic/resource management, etc.
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Embodiment 1
[0077] Such as figure 1 As shown, in the communication method for the coexistence of D2D communication and cellular communication in a multi-antenna scenario in this embodiment, performing the cellular communication includes the following steps:
[0078] Step A1: Both the base station and the D2D transmitter send training sequences to the cellular user and the D2D receiver;
[0079] Step A2: Both the cellular user and the D2D receiver use the training sequence to estimate the channel state, and feed back the obtained channel state information to the base station;
[0080] Step A3: The base station receives and divides the spatial dimension into a first spatial dimension used for cellular communication and a second spatial dimension used for D2D communication and not overlapping with the first spatial dimension according to the channel state information;
[0081] Step A4: the base station uses the first precoding matrix to limit the cellular signal to the first spatial dimensi...
Embodiment 2
[0086] This embodiment is a further improvement on the basis of Embodiment 1, specifically as figure 2 As shown, in the communication method for the coexistence of D2D communication and cellular communication in a multi-antenna scenario in this embodiment, the D2D communication is also performed while the cellular communication is performed. The D2D communication includes the following steps:
[0087] Step B1: the base station sends the spatial dimension division result to the D2D sending end and the D2D receiving end;
[0088] Step B2: the D2D sending end and the D2D receiving end receive the space dimension division result;
[0089] Step B3: the D2D transmitting end uses the second precoding matrix to limit the D2D signal to the second spatial dimension and transmit the D2D signal;
[0090] Step B4: The D2D receiving end receives the signal, regards the cellular signal and the additive noise in the first spatial dimension on the same frequency band together as colored Gau...
Embodiment 3
[0108] In the prior art, there is still a problem of power allocation between D2D communication and cellular communication. There are two existing methods:
[0109] The first type: D2D communication and cellular communication are equal in terms of power allocation, regardless of priority. In this way, the two compete for power in a competitive relationship, which will lead to the problem that communication cannot be realized or communication is interrupted for the weaker competition;
[0110] The second type: The level of cellular communication is higher than that of D2D communication. On the basis of ensuring the minimum transmission rate of cellular communication, after power allocation, this method will easily cause the power allocated by the cellular communication method to occupy all the power used for communication. As a result, the D2D communication cannot be completed, which is contrary to the original intention of introducing the D2D communication into the cellular com...
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