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    Systems and methods for controlling a reference signal mode to facilitate beamforming
    14.
    发明授权
    Systems and methods for controlling a reference signal mode to facilitate beamforming 有权

    公开(公告)号：US09780860B1

    公开(公告)日：2017-10-03

    申请号：US14529289

    申请日：2014-10-31

    Applicant: Sprint Spectrum LP

    Inventor： Sanghoon Sung ,  Yun Sung Kim ,  Pinalkumari Tailor ,  Won H. An

    IPC: H04B7/06 ,  H04W16/08

    CPC classification number: H04B7/0632 ,  H04B7/0617 ,  H04W16/08 ,  H04W16/28

    Abstract: Systems and methods are described for controlling a reference signal mode to facilitate beamforming. A load amount for reference signals from one or more wireless devices in communication with an access node is determined and compared with load level criteria. When the load amount meets or exceeds the load level criteria, the one or more wireless devices are directed to transmit reference signals using a subband mode of transmission. A subband quality is determined for a plurality of subbands available for the one or more wireless devices and a subband for reference signal transmission is selected from the plurality of subbands based on channel quality criteria. Wireless transmission, such as from an access node, to the one or more wireless devices is scheduled utilizing beamforming based on the reference signal.

    Coverage area adjustment for circuit switched fallback
    15.
    发明授权
    Coverage area adjustment for circuit switched fallback 有权
    电路交换回退的覆盖区域调整

    公开(公告)号：US09363716B1

    公开(公告)日：2016-06-07

    申请号：US14468765

    申请日：2014-08-26

    Applicant: Sprint Spectrum LP

    Inventor： Sanghoon Sung ,  Yun Sung Kim ,  Nawara Omary

    IPC: H04W36/22 ,  H04W36/00

    CPC classification number: H04W36/0022

    Abstract: A first access node co-located with a second access node. The first access node communicates using a first type of wireless service. Scan results indicate whether a wireless device meets a first threshold criteria for being served by the second access node using a second type of wireless service. A time series of a count of these wireless devices is determined. From the time series, an indicator of a moving average of the time series is determined. Based on the moving average, the wireless devices are configured with an indicator of a second threshold criteria that determines whether a respective one of the wireless devices meets a second threshold criteria for being served by the first access node using the first type of wireless service.

    Abstract translation: 与第二接入节点共同定位的第一接入节点。 第一接入节点使用第一类无线业务进行通信。 扫描结果指示无线设备是否满足第二接入节点使用第二类型的无线服务来服务的第一阈值标准。 确定这些无线设备的计数的时间序列。 从时间序列中确定时间序列的移动平均值的指标。 基于移动平均值，无线设备被配置有第二阈值标准的指示符，其确定无线设备中的相应一个是否符合第一接入节点使用第一类型的无线服务来服务的第二阈值标准。

    Mitigating inter-cell interference via guard period adjustment
    16.
    发明授权
    Mitigating inter-cell interference via guard period adjustment 有权

    公开(公告)号：US10973022B1

    公开(公告)日：2021-04-06

    申请号：US16200986

    申请日：2018-11-27

    Applicant: Sprint Spectrum LP

    Inventor： Sanghoon Sung ,  Yu Wang ,  Udit Thakore ,  Dhaval Mehta

    IPC: H04W56/00 ,  H04W72/04 ,  H04B15/00 ,  H04B17/345

    Abstract: Mitigating interference between access nodes in a wireless network includes determining interference caused to uplink signals received at a first access node by downlink signals transmitted from a second access node, and adjusting a guard period of a special subframe utilized by one or both of access nodes based on determining the interference, by switching special subframe formats to include a longer guard period. Overall interference is mitigated based on mutually-experienced propagation delay, and channel reciprocity. Adjustments are associated with known distances between access nodes.

    Systems and methods for load balancing between frequency bands based on bandwidth capacity
    18.
    发明授权
    Systems and methods for load balancing between frequency bands based on bandwidth capacity 有权

    公开(公告)号：US10397831B1

    公开(公告)日：2019-08-27

    申请号：US15138235

    申请日：2016-04-26

    Applicant: Sprint Spectrum LP

    Inventor： Yun Sung Kim ,  Sanghoon Sung ,  Pinal Tailor ,  Dhaval Mehta

    IPC: H04W28/08 ,  H04W72/04 ,  H04L5/14

    Abstract: Systems and methods are described for load balancing between frequency bands based on bandwidth capacity. A load for a first frequency band and a load for a second frequency band may be determined, wherein a cell communicates with wireless devices over the first and second frequency bands. The determined loads may be adjusted based on a channel width for each frequency band and a duplexing scheme for each frequency band. And the adjusted loads may be balanced between the first frequency band and the second frequency band by instructing wireless devices in communication with the cell to change frequency bands used for communicating with the cell.

    Wireless user equipment RF relay management
    19.
    发明授权
    Wireless user equipment RF relay management 有权

    公开(公告)号：US10075217B1

    公开(公告)日：2018-09-11

    申请号：US14970875

    申请日：2015-12-16

    Applicant: Sprint Spectrum LP

    Inventor： Sanghoon Sung ,  Udit Thakore ,  Pinal Tailor ,  Yun Sung Kim

    IPC: H04B7/00 ,  H04B7/026 ,  H04B7/155 ,  H04W88/04

    CPC classification number: H04B7/026 ,  H04B7/15507 ,  H04B7/15528 ,  H04W88/04

    Abstract: UEs capable of RF relay are enabled and disabled under certain conditions. The access node can control the on and off duration of the UE functioning as an RF relay. The access node may only enable RF relay when there is a need by another UE for the RF relay. The UEs selected to relay (or to not relay) may be selected based on their location (e.g., close to a UE that is experiencing poor signal strength). In an embodiment, the RF relay function of UEs are successively turned on by the access node. This causes these UEs to relay the access node's beacon signal. If, after a period of time, the wireless network performance is not improved, these UEs are commanded to disable their RF relays. If the wireless network performance is improved, the UE may be allowed to continue as an RF relay.

    Systems and methods for determining a modulation and coding scheme for a small cell
    20.
    发明授权
    Systems and methods for determining a modulation and coding scheme for a small cell 有权

    公开(公告)号：US09621301B1

    公开(公告)日：2017-04-11

    申请号：US14567237

    申请日：2014-12-11

    Applicant: Sprint Spectrum LP

    Inventor： Yun Sung Kim ,  Sanghoon Sung ,  Pinal Tailor ,  Tri Duong

    IPC: H04L1/00 ,  H04W24/08

    CPC classification number: H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L2001/0092 ,  H04W84/045

    Abstract: Systems and methods are described for determining a modulation and coding scheme for a small cell. A small cell may receive a first signal level for a first signal received at a wireless device and a second signal level for a second signal received at the wireless device, wherein the received first signal is from the small cell and the received second signal is from a macro cell. The small cell may also receive a channel quality indicator from the wireless device that indicates a channel quality for communications between the wireless device and the small cell. A signal level metric may be calculated based on the first signal level, the second signal level, and the received channel quality indicator. A modulation and coding scheme for a transmission from the small call may be determined, wherein the transmission is associated with an almost blank subframe transmission from the macro cell.

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