公开(公告)号：US10911191B2

公开(公告)日：2021-02-02

申请号：US16584003

申请日：2019-09-26

Applicant: Centre of Excellence in Wireless Technology ,  Indian Institute of Technology Madras (IIT Madras)

Inventor： Abhijeet Abhimanyu Masal ,  Priyanka Dey ,  Sunil Kaimalettu ,  Dhivagar Baskaran ,  Paka Venkata Sriharsha ,  Jeniston Deviraj Klutto Milleth ,  Bhaskar Ramamurthi

IPC: H04L5/00 ,  H04L27/26

Abstract: Accordingly, the invention provides a method and apparatus for managing communication operations in an Orthogonal Frequency Division Multiplexing (OFDM) system. Further the method includes generating, by a first OFDM apparatus (100), a signal comprising data and at least one of a Reference Signal (RS) and a message, the signal is generated by repeating the at least one of the RS and the message over a set of OFDM symbols using a resource mapper, performing an Inverse Fourier Transform operation (IFFT) according to a numerology of a first OFDM apparatus, adding a Cyclic Prefix (CP) to the data, and adding a block CP to the at least one of the repeated RS and the message. Further, the method includes transmitting, by the first OFDM apparatus (100), the signal to a second OFDM apparatus (200).

公开(公告)号：US20200228213A1

公开(公告)日：2020-07-16

申请号：US16739594

申请日：2020-01-10

Applicant: Centre of Excellence in Wireless Technology ,  Indian Institute of Technology Madras (IIT Madras)

Inventor： Abhijeet Abhimanyu Masal ,  Priyanka Dey ,  Sunil Kaimalettu ,  Jeniston Deviraj Klutto Milleth ,  Bhaskar Ramamurthi

IPC: H04B17/345 ,  H04W72/08 ,  H04J11/00 ,  H04L5/00 ,  H04W24/10 ,  H04B17/318

Abstract: The method includes configuring a first CLI-RS configuration at a first UE (200a). Further, the method includes configuring a second CLI-RS configuration at a second UE (200b). Further, the method includes generating a CLI-RS sequence using a common CLI-RS reference point known to the first UE (200a) and the second UE (200b). Further, the method includes filling the CLI-RS sequence in the first set of CLI-RS resources indicated in the first CLI-RS configuration. Further, the method includes transmitting the CLI-RS sequence filled in the first set of CLI-RS resources indicated in the first CLI-RS configuration to the second UE (200b). Further, the method includes receiving the CLI-RS sequence transmitted by the first UE (200a). Further, the method includes processing the received CLI-RS sequence based on the second CLI-RS configuration.

公开(公告)号：US10193649B2

公开(公告)日：2019-01-29

申请号：US15091996

申请日：2016-04-06

Applicant: Centre of Excellence in Wireless Technology ,  Indian Institute of Technology Madras

Inventor： Krishnamurthy Giridhar ,  Devar Sendilramkumar Subbiah ,  Ayyar Arun Balavenkatasubramanian

IPC: H04Q7/00 ,  H04J11/00 ,  H04B7/0452

Abstract: Embodiments herein disclose a method of enabling non-ICBM transmissions in the communication network. The method includes transmitting information of the number of receiver antennas at user equipments (UEs) intended to be scheduled by a transmitter in common resource elements, to a controller in the communication network. Further, the method includes receiving a number of non-Interference Cancelling Block Modulation (ICBM) transmissions from the controller. Furthermore, the method includes transmitting information indicating cell-identification numbers of participating transmitters, and corresponding index of ICBM precoder matrix of the participating transmitters to the UEs.

公开(公告)号：US10122426B2

公开(公告)日：2018-11-06

申请号：US15204477

申请日：2016-07-07

Applicant: Centre of Excellence in Wireless Technology ,  Indian Institute of Technology Madras

Inventor： Jeniston Deviraj Klutto Milleth ,  Chandrasekaran Mohandoss ,  Sendilramkumar Devar ,  Thulasiram Jonna ,  Abhijeet Masal ,  Bhaskar Ramamurthi

IPC: H04B7/04 ,  H04B7/0456

Abstract: Embodiments herein provide a method for beam steering in a Multiple Input Multiple Output (MIMO) system. The method includes steering a transmit beam using a precoder matrix determined based on a plurality of parameters, wherein the transmit beam is formed using at least one of a weight of each antenna element, a number of antenna elements, and an inter-antenna element spacing.

公开(公告)号：US20180199371A1

公开(公告)日：2018-07-12

申请号：US15863911

申请日：2018-01-06

Applicant: Centre of Excellence in Wireless Technology ,  Indian Institute of Technology Madras (IIT Madras)

Inventor： Nithin Srinivasan ,  Dhivagar Baskaran ,  Chandrasekaran Mohandoss ,  Sunil Kaimalettu ,  Jeniston Deviraj Klutto Milleth ,  Bhaskar Ramamurthi

IPC: H04W74/04 ,  H04W72/12 ,  H04W72/04 ,  H04W74/00 ,  H04W40/12 ,  H04W4/20 ,  H04W76/27

CPC classification number: H04W74/04 ,  H04L1/18 ,  H04L1/1812 ,  H04W4/20 ,  H04W40/12 ,  H04W72/042 ,  H04W72/0453 ,  H04W72/1289 ,  H04W74/006 ,  H04W74/0841 ,  H04W76/27 ,  H04W76/30

Abstract: Embodiments herein provide a method and system for managing Grant-free data transmission in a radio communication network. The proposed method includes composing, by a Base Station (BS), a Select Signal (SS) for a transceiver device, where the SS is configured to control a grant-free data transmission from the transceiver device. Further, the proposed method includes transmitting, by the BS, the SS to the transceiver device. Further, the proposed method includes receiving, by a transceiver device, the SS from the BS. Further, the proposed method includes decoding, by the transceiver device, the SS and furthermore, the proposed method includes controlling, by the transceiver device, a data transmission by one of activating the grant-free data transmission from the transceiver device in response to successful decoding of the SS, and deactivating the grant-free data transmission from the transceiver device in response to unsuccessful decoding of the SS.

公开(公告)号：US20170353342A1

公开(公告)日：2017-12-07

申请号：US15614326

申请日：2017-06-05

Applicant: Centre of Excellence in Wireless Technology ,  Indian Institute of Technology Madras (IIT Madras)

Inventor： Dhivagar Baskaran ,  Jeniston Deviraj Klutto Milleth ,  Sunil Kaimalettu ,  Navinnath Palanisamy ,  Bhaskar Ramamurthi

IPC: H04L27/26 ,  H04L5/00

CPC classification number: H04L27/2628 ,  H04L5/0048 ,  H04L5/0062 ,  H04L5/0073 ,  H04L27/2636

Abstract: Embodiments herein provide an OFDMA method for performing OFDM based communication in a wireless communication system. The OFDMA method includes splitting a carrier bandwidth into a number of subbands and modulating resource units in each of the subbands with data symbols in a parallel manner Further, multiplexing the resource units by transforming each of the modulated resource units through a plurality of unitary transformations at a stage. Further, generating an output by performing a parallel to serial conversion of the transformed resource units. Further, the OFDMA method includes generating an OFDM signal by multiplexing an output from at least one of the previous stage to another stage by transforming the output through a unitary transformation for a defined number of times. Furthermore, the OFDMA method includes transmitting the OFDM signal over a wireless channel in the wireless network system.

公开(公告)号：US20170019238A1

公开(公告)日：2017-01-19

申请号：US15211443

申请日：2016-07-15

Applicant: Centre of Excellence in Wireless Technology ,  Indian Institute of Technology Madras

Inventor： Ankit Sharma ,  Jeniston Deviraj Klutto Milleth ,  Radha Krishna Ganti ,  Sunil Kaimalettu ,  Bhaskar Ramamurthi

IPC: H04L5/14 ,  H04L1/18 ,  H04L5/00

CPC classification number: H04L5/14 ,  H04B1/54 ,  H04B7/0617 ,  H04L1/1812 ,  H04L5/0007 ,  H04L5/0048 ,  H04L5/0062 ,  H04L5/1461

Abstract: The embodiments herein provide a method for In Band Full Duplex (IBFD) communication in a radio network including at least one IBFD node, at least one first non-IBFD User Equipment (UE) and at least one second non-IBFD UE. The method includes transmitting by the at least one IBFD node a first signal to the at least one first non-IBFD UE over a forward channel, and receiving by the at least one IBFD node a second signal from the at least one second non-IBFD UE over the same forward channel simultaneously, where the second signal includes at least one of a pilot signal, Channel State Information (CSI), and control information, where the forward channel is orthogonal to a reverse channel in at least one of time, frequency, space, and code.

Abstract translation: 本文的实施例提供了一种在包括至少一个IBFD节点，至少一个第一非IBFD用户设备（UE）和至少一个第二非IBFD UE的无线电网络中的带内全双工（IBFD）通信的方法。 所述方法包括由所述至少一个IBFD节点通过前向信道向所述至少一个第一非IBFD UE发送第一信号，以及由所述至少一个IBFD节点从所述至少一个第二非IBFD接收第二信号 UE在相同的前向信道上同时进行，其中第二信号包括导频信号，信道状态信息（CSI）和控制信息中的至少一个，其中正向信道在时间，频率中的至少一个中与正向信道正交 ，空格和代码。

公开(公告)号：US20150229435A1

公开(公告)日：2015-08-13

申请号：US14617853

申请日：2015-02-09

Applicant: Centre of Excellence in Wireless Technology

Inventor： Sheetal Kalyani ,  Narendran Kishnan ,  Saishankar Katri Pulliyakode

IPC: H04L1/00 ,  H04L1/18 ,  H04L5/00 ,  H04W72/04 ,  H04W24/06

CPC classification number: H04L1/0009 ,  H04L1/0003 ,  H04L1/0016 ,  H04L1/0019 ,  H04L1/0026 ,  H04L1/0035 ,  H04L1/1607 ,  H04L1/1812 ,  H04L5/0057 ,  H04W24/06

Abstract: The embodiments described herein provide a method and system for improve link adaption performance in wireless networks. The method for modifying the MCS index for transmission using a computed offset is provided. The offset is calculated based on HARQ feedback of transmissions. A transition probability matrix with plurality of MCS indices is used for selecting the MCS index for transmission based on the highest probability of transition. A pattern sequence of MCS indices is formed and the presence of the pattern is determined in the history of the HARQ transmissions. The frequency of the pattern presence is also determined and the MCS index is selected for the HARQ transmissions. A frequency database of MCS indices is built using source encoding techniques. The transition probabilities that are estimated from the frequency database along with a cost function associated with each MCS index will be used to compute next MCS index.

Abstract translation: 本文描述的实施例提供了一种用于改善无线网络中的链路适应性能的方法和系统。 提供了使用计算的偏移来修改用于传输的MCS索引的方法。 基于传输的HARQ反馈来计算偏移。 使用具有多个MCS索引的转移概率矩阵，用于基于最高转换概率来选择用于传输的MCS索引。 形成MCS索引的模式序列，并且在HARQ传输的历史中确定模式的存在。 还确定了模式存在的频率，并且为HARQ传输选择了MCS索引。 使用源编码技术构建MCS索引的频率数据库。 从频率数据库估计的转移概率以及与每个MCS索引相关联的成本函数将用于计算下一个MCS索引。

公开(公告)号：US20150011224A1

公开(公告)日：2015-01-08

申请号：US14322511

申请日：2014-07-02

Applicant: Centre of Excellence in Wireless Technology

Inventor： Kalyana Rama Sesha Sayee Kompalli Chakravartula ,  Nadeem Akhtar ,  Siva Kishore Reddy Yerrapareddy ,  Sunil Kaimalettu ,  Venkatarao Gonuguntla

IPC: H04W36/32 ,  H04W36/00

CPC classification number: H04W36/0083 ,  H04W36/30

Abstract: The embodiments herein provide a method and system to trigger UE handover in a radio communication network including a serving base station and a plurality of candidate base stations. The serving base station shares uplink transmission information associated with the UE with the candidate base stations. A candidate base station detects the presence of the UE located in radio coverage of the candidate base station by obtaining information from the uplink transmission of the UE. Further, the candidate base station computes a second parameter and sends to the serving base station. The serving base station determines to trigger handover procedure when the second parameter meets handover criteria. Further, the serving base station sends handover command to the UE after determining that the second parameter meets handover criteria.

Abstract translation: 本文的实施例提供了一种在包括服务基站和多个候选基站的无线电通信网络中触发UE切换的方法和系统。 服务基站与候选基站共享与UE相关联的上行链路传输信息。 候选基站通过从UE的上行链路传输获取信息来检测位于候选基站的无线覆盖范围内的UE的存在。 此外，候选基站计算第二参数并发送给服务基站。 当第二参数满足切换标准时，服务基站确定触发切换过程。 此外，服务基站在确定第二参数满足切换标准之后，向UE发送切换命令。