公开(公告)号：US20200336922A1

公开(公告)日：2020-10-22

申请号：US16387825

申请日：2019-04-18

Applicant: Cisco Technology, Inc.

Inventor： Qing Zhao ,  Benjamin Jacob Cizdziel ,  Gautam Dilip Bhanage

IPC: H04W24/02 ,  H04B7/0452

Abstract: Pattern recognition and classification of packet error characteristics for Multi-user Multiple Input Multiple Output (MU-MIMO) optimization may be provided. First, a packet error characteristic data of a channel for a Downlink (DL) Multi-user (MU) group may be received. Next, the received packet error characteristic data may be provided as input data to a classifier model. Then, in response to providing the received packet error characteristic data as the input data to the classifier model, output data may be received from the classifier model. The output data may indicate at least one probability value corresponding to at least one channel effect. An optimization for improving performance of DL MU-MIMO in the presence of the at least one channel effect may then be performed when the at least one probability value is above or below a predetermined level.

公开(公告)号：US20200275282A1

公开(公告)日：2020-08-27

申请号：US16287207

申请日：2019-02-27

Applicant: Cisco Technology, Inc.

Inventor： Qing Zhao ,  Dantong Liu ,  Fred Jay Anderson ,  Matthew Aaron Silverman

IPC: H04W16/10 ,  H04W72/04

Abstract: A distributed controller of local radio resources implements a hybrid FFR system. The distributed controller provides user channel information to a central controller of regional radio resources. The distributed controller also obtains an FFR plan from the central controller. The FFR plan designates for an access point associated with the distributed controller, a central frequency band, an edge frequency band, and a distribution of user devices connected to the access point. The distribution indicates whether each user device communicates with the access point via the central frequency band or via the edge frequency band. The distributed controller provisions the access pint to connect to the user devices according to the FFR plan, and adjusts the distribution of user devices locally based on a change in the user channel information.

公开(公告)号：US10375582B2

公开(公告)日：2019-08-06

申请号：US15991155

申请日：2018-05-29

Applicant: Cisco Technology, Inc.

Inventor： Vikram Chandrasekhar ,  Kedar Shirali ,  Qing Zhao ,  Rajesh Pazhyannur

IPC: H04W72/00 ,  H04W16/14 ,  H04W74/08 ,  H04L1/18

Abstract: A mobile device transmits data over a shared spectrum in an uplink channel to a base station in a contention-based access scheme. The mobile device obtains data to be wirelessly transmitted over the shared spectrum in the uplink channel to the base station. The uplink channel is formatted with a frame/subframe structure with a predetermined timing. The mobile device determines whether the shared spectrum is free for transmission according to a listen before transmit procedure. When the shared spectrum is free for transmission, the mobile device contends with other mobile device to gain access to the uplink channel. After gaining access to the uplink channel, the mobile device transmits the data over the shared spectrum in the uplink channel to the base station.

公开(公告)号：US10165589B2

公开(公告)日：2018-12-25

申请号：US15809077

申请日：2017-11-10

Applicant: Cisco Technology, Inc.

Inventor： Ritesh K. Madan ,  Vikram Chandrasekhar ,  Rohit Umesh Nabar ,  Kedar Durgadas Shirali ,  Qing Zhao

IPC: H04W72/12 ,  H04W72/04 ,  H04W72/08 ,  H04W16/32 ,  H04L5/00

Abstract: An example method is provided in one example embodiment and includes receiving performance metric information from a plurality of small cell radios, wherein the performance metric information includes, at least in part, a number of user equipment that are to be scheduled on a first type and a second type of subframes for each small cell radio; determining resource allocation parameters for the plurality of small cell radios; exchanging interference information between two or more small cell radios of the plurality of small cell radios that includes an indication of whether a particular small cell radio is interfering with or is interfered by another small cell radio of the two or more small cell radios; and scheduling downlink resource transmissions on the first type and the second type of subframes for user equipment served by the two or more small cell radios.

公开(公告)号：US20170127441A1

公开(公告)日：2017-05-04

申请号：US14925750

申请日：2015-10-28

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Vikram Chandrasekhar ,  Kedar D. Shirali ,  Ritesh K. Madan ,  Qing Zhao ,  Sushanth Chandappa Kulal

IPC: H04W72/12 ,  H04W28/02

CPC classification number: H04W72/1289 ,  H04L47/26 ,  H04W28/0278 ,  H04W72/1247 ,  H04W72/1252

Abstract: Embodiments include starting a first timer if a queue state associated with a user equipment (UE) is estimated to equal zero bytes of data and if a last buffer status report received from the UE indicated the queue state to be greater than zero bytes of data, sending a control message granting uplink resources to the UE if the first timer expires, and determining the queue state associated with the UE based, at least in part, on a response to the control message. In specific embodiments the first timer expires if neither a scheduling request nor a buffer status report is received during a first timer interval after the first timer is started. Further embodiments include stopping the first timer if a scheduling request or a buffer status report is received before the first timer expires.