公开(公告)号：US09936414B2

公开(公告)日：2018-04-03

申请号：US15270864

申请日：2016-09-20

Applicant: NEC Laboratories America, Inc.

Inventor： Eugene Chai ,  Mohammad Khojastepour ,  Sampath Rangarajan ,  Karthikeyan Sundaresan ,  Krishna Garikipati

IPC: H04W24/10 ,  H04W48/18 ,  H04W72/04 ,  H04W72/08 ,  H04W16/14 ,  H04W74/08 ,  H04W84/04 ,  H04W84/12 ,  H04W72/12

CPC classification number: H04W24/10 ,  H04W16/14 ,  H04W48/18 ,  H04W72/0446 ,  H04W72/082 ,  H04W72/1215 ,  H04W74/0816 ,  H04W84/042 ,  H04W84/12 ,  H04W88/10

Abstract: Systems and methods for improving Long Term Evolution (LTE)-WiFi coexistence in a network, including configuring one or more LTE nodes for asynchronous access and synchronous transmission to bridge LTE and WiFi access modes. A channel is reserved for LTE transmission in the one or more LTE nodes, and a supplementary WiFi module is provided in the one or more LTE nodes for sensing the channel for occupancy and for broadcasting a reservation signal on the channel prior to the LTE transmission. Contention window sizes are scaled linearly by increasing the contention window sizes proportionally to a subframe collision rate to maintain throughput fairness to the WiFi, and synchronous transmission from the one or more LTE nodes to one or more User Devices (UEs) is performed by activating the unlicensed carrier for a reserved time period.

公开(公告)号：US10091114B2

公开(公告)日：2018-10-02

申请号：US15057272

申请日：2016-03-01

Applicant: NEC Laboratories America, Inc.

Inventor： Eugene Chai ,  Karthikeyan Sundaresan ,  Mohammad Khojastepour ,  Sampath Rangarajan ,  Krishna Garikipati

IPC: H04W4/00 ,  H04L12/851 ,  H04W28/12 ,  H04L12/801 ,  H04W74/08 ,  H04W80/00 ,  H04L12/26 ,  H04W88/10

Abstract: Methods and systems of asynchronous access and synchronous transmission include transmitting an initial reservation packet using a first protocol to prevent other devices that use the first protocol from transmitting during a reserved duration. A carrier using a second protocol is activated. Information is transmitted using a second protocol during the reserved duration. During a last subframe of the reserved duration, an additional reservation packet is transmitted using the first protocol to extend the reserved duration. The transmission of the additional reservation packet takes place while the carrier using the second protocol is still active.

公开(公告)号：US20170094546A1

公开(公告)日：2017-03-30

申请号：US15270864

申请日：2016-09-20

Applicant: NEC Laboratories America, Inc.

Inventor： Eugene Chai ,  Mohammad Khojastepour ,  Sampath Rangarajan ,  Karthikeyan Sundaresan ,  Krishna Garikipati

IPC: H04W24/10 ,  H04W48/18 ,  H04W72/04 ,  H04W72/08

CPC classification number: H04W24/10 ,  H04W16/14 ,  H04W48/18 ,  H04W72/0446 ,  H04W72/082 ,  H04W72/1215 ,  H04W74/0816 ,  H04W84/042 ,  H04W84/12 ,  H04W88/10

Abstract: Systems and methods for improving Long Term Evolution (LTE)-WiFi coexistence in a network, including configuring one or more LTE nodes for asynchronous access and synchronous transmission to bridge LTE and WiFi access modes. A channel is reserved for LTE transmission in the one or more LTE nodes, and a supplementary WiFi module is provided in the one or more LTE nodes for sensing the channel for occupancy and for broadcasting a reservation signal on the channel prior to the LTE transmission. Contention window sizes are scaled linearly by increasing the contention window sizes proportionally to a subframe collision rate to maintain throughput fairness to the WiFi, and synchronous transmission from the one or more LTE nodes to one or more User Devices (UEs) is performed by activating the unlicensed carrier for a reserved time period.

公开(公告)号：US20160269941A1

公开(公告)日：2016-09-15

申请号：US15057272

申请日：2016-03-01

Applicant: NEC Laboratories America, Inc.

Inventor： Eugene Chai ,  Karthikeyan Sundaresan ,  Mohammad Khojastepour ,  Sampath Rangarajan ,  Krishna Garikipati

IPC: H04W28/26 ,  H04L12/26 ,  H04L12/851 ,  H04W28/12 ,  H04L12/801

CPC classification number: H04L47/24 ,  H04L43/0829 ,  H04L43/0852 ,  H04L47/14 ,  H04W28/12 ,  H04W74/0816 ,  H04W80/00 ,  H04W88/10

Abstract: Methods and systems of asynchronous access and synchronous transmission include transmitting an initial reservation packet using a first protocol to prevent other devices that use the first protocol from transmitting during a reserved duration. A carrier using a second protocol is activated. Information is transmitted using a second protocol during the reserved duration. During a last subframe of the reserved duration, an additional reservation packet is transmitted using the first protocol to extend the reserved duration. The transmission of the additional reservation packet takes place while the carrier using the second protocol is still active.

Abstract translation: 异步访问和同步传输的方法和系统包括使用第一协议发送初始预留分组，以防止在保留持续时间期间使用第一协议的其他设备进行传输。 使用第二协议的载波被激活。 在保留期间内使用第二协议发送信息。 在保留持续时间的最后一个子帧期间，使用第一协议传输附加的预留分组以延长预留的持续时间。 当使用第二协议的载波仍然有效时，发生附加预约分组。