Method and equipment for realizing time and frequency synchronization between D2D (Device to Device) terminals
A time-frequency synchronization and terminal technology, applied in the field of mobile communication, can solve problems such as no solution, and achieve the effect of avoiding the influence of measurement and reducing complexity
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[0057] Example 1:
[0058] This embodiment is directed to a PC scenario, that is, UEs participating in D2D mutual discovery include ICUE and OCUE. The ICUE transmits the D2DSS and the PSBCH when the D2DSS transmission conditions are met. The resources occupied by D2DSS and PSBCH are the same as those occupied by Rel-12 broadcast communication UEs to send D2DSS and PSBCH, and the value range of D2DSS ID is different from that of Rel-12 D2D UEs, thus ensuring that UEs participating in D2D mutual discovery in PC scenarios The DMRS of the transmitted D2DSS and PSBCH are orthogonal to the corresponding signals transmitted by the Rel-12 D2D UE. The specific implementation steps are as follows:
[0059] Step 210: The ICUE obtains the synchronization resource configuration in the cell, and sends information such as synchronization signal trigger condition configuration, D2DSS and PSBCH configuration, and D2D mutual discovery resource configuration.
[0060] The configuration of syn...
Example Embodiment
[0076] Embodiment 2:
[0077] This embodiment is directed to a PC scenario, that is, UEs participating in D2D mutual discovery include ICUE and OCUE. The ICUE transmits the D2DSS and the PSBCH when the D2DSS transmission conditions are met. The resources occupied by D2DSS and PSBCH are the same as those occupied by Rel-12 broadcast communication UEs to send D2DSS and PSBCH. The D2DSS sequence used by ICUE is the same as the D2DSS sequence sent by D2D terminals in Rel-12. The demodulation reference signal of PSBCH adopts The sequence is orthogonal to the demodulation reference signal sequence of the PSBCH sent by the Rel-12 broadcast communication UE. The specific implementation steps are as follows:
[0078] Step 310: The ICUE obtains the synchronization resource configuration in the cell, and sends information such as synchronization signal trigger condition configuration, D2DSS and PSBCH configuration, and D2D mutual discovery resource configuration.
[0079] The configur...
Example Embodiment
[0092] Embodiment three:
[0093] This embodiment is directed to a PC scenario, that is, UEs participating in D2D mutual discovery include ICUE and OCUE. The ICUE transmits the D2DSS and the PSBCH when the D2DSS transmission conditions are met. The resources occupied by the D2DSS and the PSBCH are different from the resources occupied by the Rel-12 broadcast communication UE for sending the D2DSS and the PSBCH. The value range of the D2DSSID is still different from that of the Rel-12D2D UE to avoid false detection of the Rel-12OCUE. The specific implementation steps are as follows:
[0094] Step 410: The ICUE obtains the synchronization resource configuration in the cell, and sends information such as synchronization signal trigger condition configuration, D2DSS and PSBCH configuration, and D2D mutual discovery resource configuration.
[0095] The configuration of synchronization resources includes the position and period of subframes used for D2DSS transmission. The confi...
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