公开(公告)号：US10149225B1

公开(公告)日：2018-12-04

申请号：US15082258

申请日：2016-03-28

Applicant: Sprint Spectrum LP

Inventor： Siddharth Oroskar ,  Jasinder Singh ,  Nitesh Manchanda ,  Rajil Malhotra

IPC: H04W40/16 ,  H04B7/04 ,  H04B17/336 ,  H04W4/80 ,  H04B7/0452

Abstract: Systems and methods are described for selecting relay nodes for Single-User Multiple-Input-Multiple Output (SU-MIMO). A channel orthogonality and Signal-to-Interference-Plus-Noise Ratio (SINR) of a plurality of wireless devices located in a geographic area of an access node is determined. A relay-capable status of the plurality of wireless devices is determined. Non-relay capable wireless devices located in the geographic area are excluded from SU-MIMO. From the plurality of wireless devices, relay-capable wireless devices are selected for SU-MIMO. The selected relay-capable wireless devices are prioritized for SU-MIMO based on a channel orthogonality and SINR meeting a set threshold.

公开(公告)号：US11064414B1

公开(公告)日：2021-07-13

申请号：US15017849

申请日：2016-02-08

Applicant: Sprint Spectrum LP

Inventor： Siddharth Oroskar ,  Jasinder Singh ,  Rajil Malhotra ,  Nitesh Manchanda

IPC: H04W36/30 ,  H04B17/318 ,  H04W36/00

Abstract: Upon satisfying a first handover condition based on signal measurements, an identity of the one or more target access nodes is determined, the identity being associated with a latency, and a determination is made whether or not to execute the handover based on at least the identifier or the latency of the one or more target access nodes. As macrocell access nodes are known to have smaller latency than small access nodes, the macrocell access node is a preferred target, regardless of signal measurements of the small access node. In embodiments, the type or latency of the target access node is weighted higher than the signal measurement for the determination of a preferred target access node. Target access nodes may be assigned priorities based on their type, latency, and signal measurements, and highest-prioritized target access nodes may be preferred as handover targets.

公开(公告)号：US10602409B1

公开(公告)日：2020-03-24

申请号：US15049490

申请日：2016-02-22

Applicant: Sprint Spectrum LP

Inventor： Siddharth Oroskar ,  Jasinder Singh ,  Nitesh Manchanda ,  Rajil Malhotra

IPC: H04W28/18 ,  H04W72/08 ,  H04B7/26 ,  H04W28/02 ,  H04W84/04

Abstract: An access node can dynamically adjust a buffer allocation of a wireless device connected thereto, based on a packet loss or other signal degradation characteristic of a wireless link between the access node and the wireless device. The wireless device may be a relay node. The signal degradation may be indicated by a packet loss of data transmitted over the wireless link. Based on the detected signal degradation, the donor access node dynamically and in real-time adjusts a size of a buffer or sub-buffer allocated to the relay node. Threshold comparisons are used to determine when and by how much to adjust the buffer size. Operations are not limited to relay node buffers, and can be applied to buffers associated with standard wireless devices based upon signal characteristics thereof, an application requirement of the devices, or a historical trend of packets losses for the wireless links associated therewith.

公开(公告)号：US10149310B1

公开(公告)日：2018-12-04

申请号：US15017834

申请日：2016-02-08

Applicant: Sprint Spectrum LP

Inventor： Nitesh Manchanda ,  Jasinder Singh ,  Siddharth Oroskar ,  Rajil Malhotra

IPC: H04B7/14 ,  H04W72/10 ,  H04W72/08 ,  H04W74/08 ,  H04L5/00

Abstract: A relay wireless device is configured to function as a relay on behalf of a donor access node. The relay wireless device determines a preferred donor access node from among a plurality of candidate donor access nodes based on a measurement of a reference signal, such as an RSRP or SINR, associated with each access node within a range of the relay wireless device. The access nodes may be prioritized based on the measurement, as well as based on a maximum number of dedicated random access preambles provided by each access node, and a default paging cycle of each access node. The access node that has the highest priority based on a good RSRP/SINR, a high number of dedicated random access preambles, and a large paging cycle, is selected as the preferred donor access node, and a connection request submitted to the preferred donor access node.

公开(公告)号：US10021616B2

公开(公告)日：2018-07-10

申请号：US15017822

申请日：2016-02-08

Applicant: Sprint Spectrum LP

Inventor： Siddharth Oroskar ,  Jasinder Singh ,  Rajil Malhotra ,  Nitesh Manchanda

IPC: H04W36/22 ,  H04L12/26 ,  H04W36/00 ,  H04W28/02 ,  H04W36/30 ,  H04W76/04 ,  H04W76/27

CPC classification number: H04W36/22 ,  H04L43/16 ,  H04W28/0205 ,  H04W28/0289 ,  H04W28/08 ,  H04W36/30 ,  H04W76/27

Abstract: Upon a determination that a relay backhaul link of a relay node is using excessive resources of a donor access node, wireless devices attached to the relay node are offloaded to other access nodes such as neighbor access nodes or to a different frequency band deployed by the donor access node or its neighbors. A donor access node transmits a congestion indicator to the relay node. The relay node transmits updated measurement parameters to end-user wireless devices connected thereto. An end-user wireless device reports back to the relay node in the event it measures a signal strength that is stronger than the current signal strength. This measurement event triggers a handoff of the end-user wireless device, thereby helping to alleviate the resource utilization of the air-interface of the donor access node.

公开(公告)号：US10117133B1

公开(公告)日：2018-10-30

申请号：US15017843

申请日：2016-02-08

Applicant: Sprint Spectrum LP

Inventor： Siddharth Oroskar ,  Jasinder Singh ,  Rajil Malhotra ,  Nitesh Manchanda

IPC: H04W36/00 ,  H04B7/155

Abstract: A relay node is enabled to transmit, to an end-user wireless device, any data packets remaining in a buffer associated with the end-user wireless device, prior to executing a handover of the end-user wireless device. Upon initiating a handover, the relay node adjusts a scheduling operation to use a lowest-possible modulating coding scheme (MCS) in order to transmit the remaining buffered data to the end-user wireless device. Moreover, the scheduling operation is adjusted to ignore any subsequent channel quality indicator (CQI) reports from the end-user wireless device, thereby ensuring that the end-user wireless device has a higher chance of receiving the data. When the buffer is empty, the handover is executed.