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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
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.
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2.发明授权公开(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
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.
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公开(公告)号：US09942901B2
公开(公告)日：2018-04-10
申请号：US14933058
申请日：2015-11-05
Applicant: Cisco Technology, Inc.
Inventor： Vikram Chandrasekhar , James Seymour , Rajesh Pazhyannur , Andrew Myles
CPC classification number: H04W72/0453 , H04L5/005 , H04W16/14 , H04W74/002 , H04W74/0816
Abstract: A method is provided for minimizing cross-technology interference with data transmissions from a wireless device in a shared spectrum. The wireless device obtains data to be wirelessly transmitted in a transmission burst in a first radio access technology (RAT) format over a shared spectrum. The wireless device generates a preamble comprising assistance information related to the transmission burst. The preamble comprises a first preamble portion in the first RAT format and a second preamble portion in a second RAT format. The wireless device transmits the preamble followed by the transmission burst.
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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
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.
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公开(公告)号：US09571228B2
公开(公告)日：2017-02-14
申请号：US14557722
申请日：2014-12-02
Applicant: Cisco Technology, Inc.
Inventor： Ritesh Kumar Madan , Rohit Umesh Nabar , Vikram Chandrasekhar
IPC: H04L1/00
CPC classification number: H04L1/0015 , H04B17/336 , H04L1/0026 , H04W52/143
Abstract: The present disclosure provides a fine-grained link adaptation mechanism that allows for link adaptation at a resource block granularity. To this end, the fine-grained link adaptation mechanism can determine the effective signal-to-interference-plus-noise ratio for individual user equipment in a particular cell at the resource block granularity. This way, the transmitter can use the effective signal-to-interference-plus-noise ratio to adapt the modulation and coding scheme at the resource block granularity. The fine-grained link adaptation mechanism can be introduced to a long term evolution (LTE) network without substantial redesign of the LTE network.
Abstract translation: 本公开提供了一种细粒度的链路自适应机制，其允许以资源块粒度的链路适配。 为此，细粒度的链路自适应机制可以以资源块粒度来确定特定小区中的各个用户设备的有效信号与干扰加噪声比。 这样，发射机可以利用有效的信号与干扰加噪声比来调整和编码方案在资源块的粒度上。 可以将细粒度的链路适配机制引入到长期演进（LTE）网络中，而不需要对LTE网络进行大量重新设计。
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Patent Agency Ranking
公开(公告)号：US10680743B2
公开(公告)日：2020-06-09
申请号：US15429016
申请日：2017-02-09
Applicant: CISCO TECHNOLOGY, INC.
Inventor： Ritesh Kumar Madan , Rohit Umesh Nabar , Vikram Chandrasekhar
IPC: H04L1/00 , H04B17/336 , H04W52/14
Abstract: The present disclosure provides a fine-grained link adaptation mechanism that allows for link adaptation at a resource block granularity. To this end, the fine-grained link adaptation mechanism can determine the effective signal-to-interference-plus-noise ratio for individual user equipment in a particular cell at the resource block granularity. This way, the transmitter can use the effective signal-to-interference-plus-noise ratio to adapt the modulation and coding scheme at the resource block granularity. The fine-grained link adaptation mechanism can be introduced to a long term evolution (LTE) network without substantial redesign of the LTE network.
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公开(公告)号：US10104689B2
公开(公告)日：2018-10-16
申请号：US15057733
申请日：2016-03-01
Applicant: Cisco Technology, Inc.
Inventor： Rajesh Pazhyannur , Vikram Chandrasekhar , Raymond Yuk Chor Kwan
IPC: H04W74/08
Abstract: A first wireless device determines the duration of a clear channel assessment interval based on feedback signals before transmitting data to a second wireless device. The first wireless device receives feedback signals, such as acknowledgement (ACK) and negative acknowledgement (NAK) signals, from one or more second wireless devices. The first wireless device determines a ratio of NAK/ACK signals in the feedback signals for a predetermined amount of time. The first wireless device determines whether the wireless medium is free by monitoring for wireless signals during a clear channel assessment interval. The duration of the clear channel assessment interval is based on the ratio of NAK/ACK signals. If the wireless medium is free for the duration of the clear channel assessment, the first wireless device wirelessly transmits data to at least one of the second wireless devices.
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公开(公告)号：US10028151B2
公开(公告)日：2018-07-17
申请号：US15227099
申请日：2016-08-03
Applicant: Cisco Technology, Inc.
Inventor： Vikram Chandrasekhar , Kedar Shirali , Qing Zhao , Rajesh Pazhyannur
Abstract: A mobile device obtains data to be wirelessly transmitted over a shared spectrum in an uplink channel to a 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 selects a start time in the uplink channel that mitigates interference from other mobile devices in proximity to the mobile device. Beginning at the start time, the mobile device transmits the data over the shared spectrum in the uplink channel to the base station.
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9.发明授权公开(公告)号：US09826545B2
公开(公告)日：2017-11-21
申请号：US14951987
申请日：2015-11-25
Applicant: CISCO TECHNOLOGY, INC.
Inventor： Ritesh K. Madan , Vikram Chandrasekhar , Rohit Umesh Nabar , Kedar Durgadas Shirali , Qing Zhao
CPC classification number: H04W72/1273 , H04L5/0035 , H04L5/0073 , H04W16/32 , H04W72/0413 , H04W72/042 , H04W72/082 , H04W72/1226 , H04W72/1231 , H04W72/1289
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.
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公开(公告)号：US09756654B2
公开(公告)日：2017-09-05
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
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.
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