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公开(公告)号：US10117241B1
公开(公告)日：2018-10-30
申请号：US15276359
申请日：2016-09-26
Applicant: Sprint Spectrum L.P.
Inventor： Yu Zhou , Muhammad Ahsan Naim , Luca Zappaterra
Abstract: Disclosed is a method and system for adjusting a transport block size used for uplink transmissions from a user equipment device (UE) when engaging in uplink coordinated multipoint service (UL CoMP), under conditions in which a propagation delay to a receiving CoMP base station (BS) exceeds a threshold. Based on predicted delay reported to a serving BS from the CoMP BS, the serving BS may compute a reduced transport block size such that uplink resource blocks transmitted from the UE to the CoMP base station will be temporally under-filled by an amount corresponding to the predicted delay. As received at the CoMP BS, the under-filled resource blocks will not overrun their assigned transmission time interval (TTI), and therefore will not be a source of potential interference.
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公开(公告)号：US10014996B1
公开(公告)日：2018-07-03
申请号：US15288073
申请日：2016-10-07
Applicant: Sprint Spectrum L.P.
Inventor： Muhammad Ahsan Naim , Yu Zhou , Luca Zappaterra
CPC classification number: H04L5/0046 , H04J11/0053 , H04L1/0001 , H04L1/0009 , H04L5/0035 , H04L5/006 , H04L2001/0092
Abstract: A method and system for bit-level protection in concurrent downlink coordinated multipoint transmission of bit groups to multiple user equipment devices (UEs) from multiple base stations. Multiple base stations each serving a respective UE and each having a separate bit stream to communicate to its respective served UE will define bit groups across the bit streams, such that each bit group includes at least one bit from each base station's bit stream. Each bit group will be transmitted as a multi-bit data symbol modulated onto a subcarrier frequency. Susceptibility to pairwise confusion between different data symbols due to misidentification of particular bits will be used to determine bit-level protection for various bit positions of the data symbols. Assignment of particular bits of each bit group to particular UEs will include consideration of bit-level protection, such that UEs with lower quality downlink properties will be assigned bits providing higher bit-level protection, and vice versa.
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Patent Agency Ranking
公开(公告)号：US09848437B1
公开(公告)日：2017-12-19
申请号：US14832110
申请日：2015-08-21
Applicant: Sprint Spectrum L.P.
Inventor： Yu Zhou , Luca Zappaterra , Muhammad Ahsan Naim
CPC classification number: H04W72/1284 , H04W72/1226
Abstract: A method and system for managing uplink control channel communication by adjacent base stations. Adjacent base stations may programmatically work with each other to arrange for their respective use of different sub-carriers for scheduling their respective uplink control channel communications. Further, to help make more efficient use of all available sub-carriers, a given base station may schedule uplink traffic channel communication for one or more user equipment devices on the same sub-carriers that a neighboring base station is using for uplink control channel communication if those one or more user equipment devices do not report detecting the neighboring base station above a threshold level.
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公开(公告)号：US09907059B1
公开(公告)日：2018-02-27
申请号：US15167395
申请日：2016-05-27
Applicant: Sprint Spectrum L.P.
Inventor： Yu Zhou , Muhammad Ahsan Naim , Luca Zappaterra
CPC classification number: H04W72/0413 , H04L5/001 , H04L5/0035 , H04W72/0453 , H04W88/02 , H04W88/08 , H04W92/10
Abstract: Disclosed is a method and system for compensating excessive delay spread in uplink coordinated multipoint service. An uplink data-unit transmitted by a user equipment device (UE) on a first uplink air interface to a first base station (BS) using a first group of sub-carrier frequencies may be received at a time that is within an alignment-time range for simultaneously decoding uplink data-units from UEs transmitting on the first uplink. A determination is made that the uplink data-unit transmitted simultaneously by the UE on a second uplink air interface using a second group of sub-carrier frequencies will be received at a second BS at a time that is time is beyond the alignment-time range for simultaneously decoding uplink data-units from UEs transmitting on the second uplink. Decoding of the received uplink data-unit at the second BS is then delayed until a start time beyond the end of the alignment-time range.
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5.发明授权公开(公告)号：US10164814B1
公开(公告)日：2018-12-25
申请号：US15213010
申请日：2016-07-18
Applicant: Sprint Spectrum L.P.
Inventor： Yu Zhou , Muhammad Ahsan Naim , Luca Zappaterra
IPC: H04L27/26 , H04B17/364 , H04W84/04 , H04L5/00
Abstract: Disclosed is a method and system for offset decoding of resource elements in a resource block to compensate for propagation delay in uplink coordinated multipoint service. A determination may be made that the initial data symbol of a time-ordered sequence of N data symbols transmitted by a user equipment device (UE) to a base station (BS) will be received at an arrival time beyond an initial one of N equally-spaced tolerance windows for simultaneous decoding of data symbols received from UEs. If it is determined that the arrival time will be within a subsequent one of the N equally-spaced tolerance windows, then the BS may receive and decode those of the N data symbols with respective arrival times in one of the subsequent tolerance windows. Otherwise, the BS may refrain from decoding any of the N data symbols. The decode data symbols may be merged with those from another BS.
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公开(公告)号：US09955458B1
公开(公告)日：2018-04-24
申请号：US14558866
申请日：2014-12-03
Applicant: Sprint Spectrum L.P.
Inventor： Yu Zhou , Muhammad Ahsan Naim
CPC classification number: H04W72/04 , H04L27/2601
Abstract: A one or more downlink resource elements of a downlink resource block in an orthogonal frequency division multiplexing (OFDM) communication system can be shared by two wireless communication devices (WCDs) by assigning each WCD a different one of two orthogonal modulation axes. To transmit data to two WCDs using the same downlink resource block, a base station may receive a data stream including respective data for each of the WCDs, then modulate the data for one WCD on in-phase modulation axis and modulate that data for the other WCD on the quadrature axis. The two modulation modes can be simultaneously transmitted on a common sub-carrier of an OFDM downlink to both WCDs. Each WCD can demodulate the data on a pre-assigned demodulation axis to recover its intended data. This sharing technique can be applied to some or all of the downlink resource elements of a commonly allocated downlink resource block.
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公开(公告)号：US09532334B1
公开(公告)日：2016-12-27
申请号：US14612474
申请日：2015-02-03
Applicant: Sprint Spectrum L.P.
Inventor： Yu Zhou , Muhammad Ahsan Naim
CPC classification number: H04W72/04 , H04L5/0007 , H04L5/0044
Abstract: Disclosed is a system and method for multiple wireless communication devices (WCDs) to share a resource block in an orthogonal frequency division multiplexing communication system by assigning each WCD a different one of multiple different sub-segments of the resource block. A base station can allocate the shared resource block on to the WCDs, and use hash function applied to each WCD to assign a different one of the sub-segments to each WCD. Each of the WCDs can apply the same hash function to determine the same sub-segment assignment made by the base station. For downlink communications, the base station can transmit data to each WCD in the assigned sub-segment, and each WCD can recover its data from its assigned sub-segment. For uplink communications, each WCD can transmit its data to the base station in its assigned sub-segment, and the base station can recover each WCD's data from the assigned sub-segment.
Abstract translation: 公开了一种用于通过将资源块的多个不同子段中的不同子段分配给每个WCD来在正交频分复用通信系统中共享资源块的多个无线通信设备（WCD）的系统和方法。 基站可以将共享资源块分配给WCD，并且使用应用于每个WCD的散列函数来将不同的一个子段分配给每个WCD。 每个WCD可以应用相同的散列函数来确定由基站做出的相同的子段分配。 对于下行链路通信，基站可以向分配的子段中的每个WCD发送数据，并且每个WCD可以从其分配的子段恢复其数据。 对于上行链路通信，每个WCD可以将其数据发送到其分配的子段中的基站，并且基站可以从所分配的子段恢复每个WCD的数据。
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