Device, network, and method for utilizing a downlink discovery reference signal
First Claim
1. A method for signaling comprising:
- receiving, by a user equipment (UE), a discovery reference signal (DRS) transmission over a first antenna port and a cell-specific reference signal (CRS) transmission over a second antenna port, the first antenna port being different from the second antenna port, the DRS transmission being a different type of signal than the CRS transmission;
processing, by the UE, the DRS transmission to obtain a DRS processing result;
processing, by the UE, the CRS transmission to obtain a CRS processing result, the DRS transmission being received prior to the CRS transmission; and
using, by the UE, the DRS processing result in conjunction with the CRS processing result to establish channel synchronization with the second antenna port when the first antenna port and the second antenna port are quasi-co-located (QCL).
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Accused Products
Abstract
User equipments can achieve quick channel synchronization when establishing a connection to base stations transitioning from a sleep mode to an active mode by using discovery resource signal (DRS) processing results and cell reference signal (CRS) processing results to establish channel synchronization with a CRS antenna port. More specifically, the user equipment may be notified that the CRS antenna port and DRS antenna port are quasi-co-located (QCL), and then use DRS processing results in conjunction with CRS processing results to obtain faster channel synchronization with a CRS antenna port. This may be particularly beneficial when the target BS is transitioned from a sleep mode to an active mode in order to accept a handover of the user equipment.
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Citations
31 Claims
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1. A method for signaling comprising:
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receiving, by a user equipment (UE), a discovery reference signal (DRS) transmission over a first antenna port and a cell-specific reference signal (CRS) transmission over a second antenna port, the first antenna port being different from the second antenna port, the DRS transmission being a different type of signal than the CRS transmission; processing, by the UE, the DRS transmission to obtain a DRS processing result; processing, by the UE, the CRS transmission to obtain a CRS processing result, the DRS transmission being received prior to the CRS transmission; and using, by the UE, the DRS processing result in conjunction with the CRS processing result to establish channel synchronization with the second antenna port when the first antenna port and the second antenna port are quasi-co-located (QCL). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A user equipment comprising:
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a processor, and a non-transitory computer readable storage medium coupled to the processor and storing programming for execution by the processor, the programming including instructions to; receive a discovery reference signal (DRS) transmission over a first antenna port and a cell-specific reference signal (CRS) transmission over a second antenna port, the first antenna port being different from the second antenna port, the DRS transmission being a different type of signal than the CRS transmission; process the DRS transmission to obtain a DRS processing result; process the CRS transmission to obtain a CRS processing result, the DRS transmission being received prior to the CRS transmission; and use the DRS processing result in conjunction with the CRS processing result to establish channel synchronization with the second antenna port when the first antenna port and the second antenna port are quasi-co-located (QCL). - View Dependent Claims (13)
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14. A method for discovery reference signaling, the method comprising:
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sending, by a network device, a first message to a user equipment, the first message indicating that a discovery resource signal (DRS) transmission is being communicated over a first antenna port, wherein the DRS transmission is communicated-by a target cell; and sending, by the network device, at least one additional message to the user equipment, the at least one additional message indicating both that a cell-specific reference signal (CRS) transmission is being communicated over a second antenna port, and that the second antenna port is quasi-co-located with the first antenna port, the second antenna port being different than the first antenna port, wherein the CRS transmission is communicated after the DRS transmission by the target cell, and wherein the at least one additional message indicating that that the second antenna port is quasi-co-located with the first antenna port prompts the user equipment to use a DRS processing result obtained from the DRS transmission to establish channel synchronization with the second antenna port. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. A network device comprising:
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a processor; and a non-transitory computer readable storage medium storing programming for execution by the processor, the programming including instructions to; send a first message to a user equipment, the first message indicating that a discovery resource signal (DRS) transmission is being communicated over a first antenna port, wherein the DRS transmission is communicated by a target cell; and send at least one additional message to the user equipment, the at least one additional message indicating both that a cell-specific reference signal (CRS) transmission is being communicated over a second antenna port, and that the second antenna port is quasi-co-located with the first antenna port, the second antenna port being different than the first antenna port, wherein the CRS transmission is communicated after the DRS transmission by the target cell, and wherein the at least one additional message indicating that the second antenna port is quasi-co-located with the first antenna port prompts the user equipment to use a DRS processing result obtained from the DRS transmission to establish channel synchronization with the second antenna port. - View Dependent Claims (24)
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25. A method for communicating in a wireless network, the method comprising:
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receiving, by a user equipment (UE), a first reference signal (RS) associated with a cell, wherein the first RS is different than a cell-specific reference signal (CRS) associated with the cell, and wherein the first RS is received at a different time than the CRS; and performing, by the UE, a radio resource management (RRM) measurement based at least on the first RS without assuming the CRS is carried in one or more downlink subframes following a subframe carrying the first RS. - View Dependent Claims (26, 27, 28, 29, 30)
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31. A method for communicating in a wireless network, the method comprising:
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transmitting, by a base station, a configuration signaling to a user equipment (UE), the configuration signaling configuring the UE to perform a radio resource management (RRM) measurement based at least on a first reference signal (RS) without assuming that a cell-specific reference signal (CRS) associated with the cell is carried in one or more downlink subframes following a subframe carrying the first RS, the first RS being different than the CRS, and the first RS being communicated at a different time than the CRS; transmitting, by the base station, the first RS to the UE; and suspending, by the base station, transmission of the CRS in one or more downlink subframes following a subframe carrying the first RS.
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Specification