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51. 发明申请

US20070223423A1 GROUPING OF USERS FOR MIMO TRANSMISSION IN A WIRELESS COMMUNICATION SYSTEM 有权
标题翻译：用于无线通信系统中的MIMO传输的用户分组
公开(公告)号：US20070223423A1
公开(公告)日：2007-09-27
申请号：US11686951
申请日：2007-03-15
申请人： Byoung-Hoon Kim , Durga Malladi
发明人： Byoung-Hoon Kim , Durga Malladi
IPC分类号： H04Q7/00
CPC分类号： H04B7/0452 , H04B7/0417 , H04B7/0632 , H04B7/0665 , H04L1/0002 , H04L1/0009 , H04L1/0015 , H04L1/002 , H04L1/0025 , H04L1/0026 , H04L1/0035 , H04L1/06
摘要： Techniques for supporting MIMO transmission are described. User equipments (UEs) are classified into a first group of UEs to be scheduled individually and a second group of UEs that can be scheduled together. The classification may be based upon the number of transmit and receive antennas, sector loading, data requirements, long-term channel statistics, the number of UEs, etc. Channel quality indicator (CQI) information received from the UEs is interpreted in different manners depending on the groups to which the UEs belong. A single UE may be selected at a time from the first group or multiple UEs may be selected at a time from the second group for MIMO transmission. A MIMO transmission may be sent to a single UE in the first group or multiple UEs in the second group at rates selected based upon the CQI information.
摘要翻译：描述了支持MIMO传输的技术。用户设备（UE）被分类为要单独调度的第一组UE和可以一起调度的第二组UE。分类可以基于发射和接收天线的数量，扇区负载，数据需求，长期信道统计，UE的数量等。从UE接收的信道质量指示符（CQI）信息以不同的方式被解释，这取决于在UE所属的组上。可以从第一组一次选择单个UE，或者可以从第二组一次选择多个UE进行MIMO传输。可以基于CQI信息选择的速率将MIMO传输发送到第一组中的单个UE或第二组中的多个UE。

52. 发明申请

US20070223422A1 RESOURCE ALLOCATION TO SUPPORT SINGLE-USER AND MULTI-USER MIMO TRANSMISSION 有权
标题翻译：资源分配支持单用户和多用户MIMO传输
公开(公告)号：US20070223422A1
公开(公告)日：2007-09-27
申请号：US11686950
申请日：2007-03-15
申请人： Byoung-Hoon Kim , Durga Malladi
发明人： Byoung-Hoon Kim , Durga Malladi
IPC分类号： H04Q7/00
CPC分类号： H04B7/0452 , H04B7/0417 , H04B7/0632 , H04B7/0634 , H04L1/06 , H04L1/1812 , H04L1/1854 , H04L1/1887 , H04L27/2608
摘要： Techniques for supporting MIMO transmission are described. Users are classified into a first group of users to be scheduled individually for MIMO transmission and a second group of users that can be scheduled together for MIMO transmission. Transmission resources are allocated to the first and second groups, e.g., based upon various criteria such as the number of users in each group, data requirements of the users, total loading for each group, etc. The transmission resources may be hybrid automatic retransmission (HARQ) interlaces, frequency channels, time frequency resources, etc. The resource allocation may be semi-static. The transmission resources allocated to each group are used for data transmission on the downlink and/or uplink for the users in the group. HARQ with blanking may be used for data transmission for the users in the first group. HARQ without blanking may be used for data transmission for the users in the second group.
摘要翻译：描述了支持MIMO传输的技术。用户被分类为要单独调度用于MIMO传输的第一组用户和可以一起调度用于MIMO传输的第二组用户。传输资源分配给第一组和第二组，例如基于各组用户数，各用户的数据需求，每个组的总负载等各种标准。传输资源可以是混合自动重传（ HARQ）交织，频率信道，时间频率资源等。资源分配可以是半静态的。分配给每个组的传输资源用于组中用户的下行链路和/或上行链路上的数据传输。具有消隐的HARQ可以用于第一组中的用户的数据传输。不消消息的HARQ可以用于第二组中的用户的数据传输。

53. 发明申请

US20060280262A1 Transmit spatial diversity for cellular single frequency networks 有权
公开(公告)号：US20060280262A1
公开(公告)日：2006-12-14
申请号：US11450229
申请日：2006-06-08
申请人： Durga Malladi
发明人： Durga Malladi
IPC分类号： H04L27/00 , H04L1/02
CPC分类号： H04B7/022 , H04B7/0491 , H04B7/0667 , H04B7/0691 , H04B7/0848 , H04L1/0002 , H04L1/0625 , H04L1/0656 , H04L27/3488
摘要： Multiple-In Multiple-Out (MIMO) techniques are used to increase spectral efficiency of a cellular single frequency network. In some embodiments with single transmit antenna per cell, multiple data streams are transmitted from multiple cells, one data stream per set of transmit antennae. The mapping of streams to antenna sets is permuted in time. In this way, user equipment devices (UEs) at cell edges benefit from MIMO, and UEs near cell centers benefit from high carrier-to-interference (C/I) ratio of the signal. In some embodiments, each stream is concurrently transmitted on base layer of a hierarchically modulated signal from one set, and on enhancement layer of a hierarchically modulated signal from another set. The mapping of sets to streams is permuted in time. The UEs at cell edges benefit from MIMO, and the UEs near cell centers benefit from the high C/I to decode both streams from the base and enhancement layers.

54. 发明申请

US20060221894A1 Method and apparatus for management of multi-carrier communications in a wireless communication system 有权
标题翻译：一种用于在无线通信系统中管理多载波通信的方法和装置
公开(公告)号：US20060221894A1
公开(公告)日：2006-10-05
申请号：US11394450
申请日：2006-03-30
申请人： Lorenzo Casaccia , Durga Malladi
发明人： Lorenzo Casaccia , Durga Malladi
IPC分类号： H04Q7/00
CPC分类号： H04B7/0871
摘要： A method and apparatus manages resources in a wireless communication system by transmitting a multi-carrier switch command message to an access terminal instructing the access terminal to switch between a diversity mode where each antenna module of a plurality antenna modules receives a single carrier signal transmitted at a single carrier frequency and a multi-carrier mode where a first antenna module of the plurality antenna modules receives a first multi-carrier signal transmitted at a first carrier frequency and a second antenna module receives a second multi-carrier signals transmitted at a second carrier frequency.
摘要翻译：一种方法和装置，通过向接入终端发送多载波切换命令消息来管理无线通信系统中的资源，该接入终端指示接入终端在多个天线模块中的每个天线模块接收单个载波信号的分集模式之间切换，单载波频率和多载波模式，其中所述多个天线模块中的第一天线模块接收以第一载波频率发射的第一多载波信号，而第二天线模块接收在第二载波处发送的第二多载波信号频率。

55. 发明申请

US20060067206A1 Method and apparatus for communication in a system employing differing transmission protocols 有权
公开(公告)号：US20060067206A1
公开(公告)日：2006-03-30
申请号：US11234723
申请日：2005-09-23
申请人： Ashok Mantravadi , Durga Malladi , Avneesh Agrawal , Anastasios Stamoulis
发明人： Ashok Mantravadi , Durga Malladi , Avneesh Agrawal , Anastasios Stamoulis
IPC分类号： H04J11/00 , H04B3/10
CPC分类号： H04L25/0226 , H04L5/0007 , H04L5/0023 , H04L5/0048 , H04L5/0058 , H04L12/189 , H04L25/0232 , H04L27/2601 , H04W52/32
摘要： A method and apparatus for communication in a system employing differing transmission protocols. It is determined whether a first time slot of one transmission protocol is adjacent to a second time slot of another transmission protocol, and if a first symbol within the first time slot is adjacent to a second symbol of the second time slot. A pilot power and/or a number of pilot sub-carriers or tones of the first symbol is increased and channel estimation is performed on the first symbol.

56. 发明申请

US20060018269A1 Transmission of overhead information for broadcast and multicast services in a wireless communication system 有权
标题翻译：在无线通信系统中传输用于广播和多播服务的开销信息
公开(公告)号：US20060018269A1
公开(公告)日：2006-01-26
申请号：US11144846
申请日：2005-06-02
申请人： Avneesh Agrawal , Durga Malladi , Anastasios Stamoulis , Ashok Mantravadi , Ramaswamy Murali
发明人： Avneesh Agrawal , Durga Malladi , Anastasios Stamoulis , Ashok Mantravadi , Ramaswamy Murali
IPC分类号： H04B7/212
CPC分类号： H04W88/10 , H04B7/2656 , H04L1/0083 , H04L5/14 , H04L27/2602 , H04W92/10 , Y02D70/1222 , Y02D70/1242 , Y02D70/1244 , Y02D70/21 , Y02D70/449
摘要： To transmit overhead information for broadcast and multicast services in a system that utilizes multiple radio technologies, time slots used for OFDM in a super-frame are initially ascertained. Overhead information for multiple streams to be sent in the time slots used for OFDM is generated. The overhead information conveys the time slots and the coding and modulation used for the streams and may be given in various forms. Multiple records may be formed for the overhead information for the streams. The overhead information for the streams is processed and time division multiplexed with the data for the streams in the super-frame. Information indicating the time slots used for OFDM in the super-frame may be sent separately or included in the overhead information. An indicator may also be appended to each stream to indicate whether there is any change in the overhead information for the stream in the next super-frame.
摘要翻译：为了在利用多个无线电技术的系统中传送用于广播和多播服务的开销信息，最初确定了用于超帧中的OFDM的时隙。产生用于在用于OFDM的时隙中发送的多个流的开销信息。开销信息传达用于流的时隙和编码和调制，并且可以以各种形式给出。可以为流的开销信息形成多个记录。对流的开销信息进行处理，并与超帧中的流的数据进行时分复用。指示用于超帧中的OFDM的时隙的信息可以单独发送或包括在开销信息中。指示符也可以附加到每个流以指示在下一个超帧中的流的开销信息是否存在任何改变。

57. 发明申请

US20060013186A1 Wireless communication system with improved broadcast coverage 有权
公开(公告)号：US20060013186A1
公开(公告)日：2006-01-19
申请号：US11144211
申请日：2005-06-02
申请人： Avneesh Agrawal , Durga Malladi , Anastasios Stamoulis , Ashok Mantravadi , Ramaswamy Murali
发明人： Avneesh Agrawal , Durga Malladi , Anastasios Stamoulis , Ashok Mantravadi , Ramaswamy Murali
IPC分类号： H04B7/208
CPC分类号： H04W88/10 , H04B7/2656 , H04L1/0083 , H04L5/14 , H04L27/2602 , H04W92/10 , Y02D70/1222 , Y02D70/1242 , Y02D70/1244 , Y02D70/21 , Y02D70/449
摘要： Techniques to transmit data with cyclic delay diversity and pilot staggering are described. For cyclic delay diversity, OFDM symbols having different cyclic delay durations are generated. The cyclic delay durations for the OFDM symbols may be selected to be time varying with respect to the cyclic delay durations for OFDM symbols transmitted by a neighboring base station. An FDM pilot is generated and multiplexed on multiple sets of subbands in different symbol periods. Waveforms for a second radio technology (e.g., W-CDMA) may be generated for data to be transmitted with this radio technology. The OFDM symbols are multiplexed onto time slots used for OFDM, and the waveforms for the second radio technology are multiplexed onto time slots used for this radio technology. One or multiple modulated signals may be generated based on the multiplexed OFDM symbols and waveforms. Each modulated signal is transmitted from a respective antenna.

58. 发明申请

US20050260998A1 Channel estimation and channel quality indicator (CQI) measurements for a high-speed downlink GPRS 有权
标题翻译：用于高速下行链路GPRS的信道估计和信道质量指示符（CQI）测量
公开(公告)号：US20050260998A1
公开(公告)日：2005-11-24
申请号：US10850310
申请日：2004-05-19
申请人： Lorenzo Casaccia , Durga Malladi , Francesco Grilli
发明人： Lorenzo Casaccia , Durga Malladi , Francesco Grilli
IPC分类号： H04W72/08 , H04Q7/20
CPC分类号： H04W72/1231 , H04W72/1284
摘要： An apparatus for providing a Time Division Multiplexing (TDM) scheme for link adaptation including use of channel estimation and Channel Quality Indicator (CQI) measurements by bundling several timeslots of a frame within the existing GSM/GPRS/EDGE system. An algorithm for providing rotation of MS users such that each one will benefit from measuring all timeslots of the frame resulting in more reliable and accurate transmission of information.
摘要翻译：一种用于通过捆绑现有GSM / GPRS / EDGE系统内的帧的几个时隙来提供用于链路适应的时分复用（TDM）方案的装置，包括使用信道估计和信道质量指示符（CQI）测量。用于提供MS用户的旋转的算法，使得每个用户将受益于测量帧的所有时隙，导致信息的更可靠和准确的传输。

59. 发明授权

US08681666B2 Partial discarding of cyclic prefix for efficient TDD or half-duplex FDD operation 有权
标题翻译：循环前缀的部分丢弃，用于高效的TDD或半双工FDD操作
公开(公告)号：US08681666B2
公开(公告)日：2014-03-25
申请号：US12206624
申请日：2008-09-08
申请人： Juan Montojo , Durga Malladi , Shimman Patel
发明人： Juan Montojo , Durga Malladi , Shimman Patel
IPC分类号： H04L1/00 , H04J3/00 , H04L27/28
CPC分类号： H04L27/2647 , H04L5/1484 , H04L27/2607
摘要： Techniques for performing partial cyclic prefix discarding are described. A user equipment (UE) may reduce the amount of cyclic prefix to discard for the last OFDM symbol prior to a switch from data reception to data transmission. This may allow the UE to complete data reception earlier and to switch to data transmission in a timely manner. In one design, the UE may receive a first OFDM symbol and discard a first amount of cyclic prefix for the first OFDM symbol. The UE may then receive a second OFDM symbol and discard a second amount of cyclic prefix for the second OFDM symbol. The second amount of cyclic prefix to discard may be determined based on the amount of time needed to switch from data reception to data transmission, which may be dependent on the amount of time advance between transmit timing and receive timing at the UE.
摘要翻译：描述用于执行部分循环前缀丢弃的技术。在从数据接收切换到数据传输之前，用户设备（UE）可以减少循环前缀的数量以丢弃最后的OFDM符号。这可以允许UE更早地完成数据接收并及时切换到数据传输。在一种设计中，UE可以接收第一OFDM符号并且丢弃用于第一OFDM符号的第一数量的循环前缀。然后，UE可以接收第二OFDM符号并且丢弃用于第二OFDM符号的第二数量的循环前缀。可以基于从数据接收切换到数据传输所需的时间量来确定丢弃的第二量的循环前缀，其可以取决于在UE处的发送定时和接收定时之间的时间推进量。

60. 发明申请

US20090122731A1 PARTIAL DISCARDING OF CYCLIC PREFIX FOR EFFICIENT TDD OR HALF-DUPLEX FDD OPERATION 有权
标题翻译：有效的TDD或半双工FDD操作的循环前缀的部分抛弃
公开(公告)号：US20090122731A1
公开(公告)日：2009-05-14
申请号：US12206624
申请日：2008-09-08
申请人： Juan Montojo , Durga Malladi , Shimman Patel
发明人： Juan Montojo , Durga Malladi , Shimman Patel
IPC分类号： H04J11/00 , H04L5/14
CPC分类号： H04L27/2647 , H04L5/1484 , H04L27/2607
摘要： Techniques for performing partial cyclic prefix discarding are described. A user equipment (UE) may reduce the amount of cyclic prefix to discard for the last OFDM symbol prior to a switch from data reception to data transmission. This may allow the UE to complete data reception earlier and to switch to data transmission in a timely manner. In one design, the UE may receive a first OFDM symbol and discard a first amount of cyclic prefix for the first OFDM symbol. The UE may then receive a second OFDM symbol and discard a second amount of cyclic prefix for the second OFDM symbol. The second amount of cyclic prefix to discard may be determined based on the amount of time needed to switch from data reception to data transmission, which may be dependent on the amount of time advance between transmit timing and receive timing at the UE.
摘要翻译：描述用于执行部分循环前缀丢弃的技术。在从数据接收切换到数据传输之前，用户设备（UE）可以减少循环前缀的数量以丢弃最后的OFDM符号。这可以允许UE更早地完成数据接收并及时切换到数据传输。在一种设计中，UE可以接收第一OFDM符号并且丢弃用于第一OFDM符号的第一数量的循环前缀。然后，UE可以接收第二OFDM符号并且丢弃用于第二OFDM符号的第二数量的循环前缀。可以基于从数据接收切换到数据传输所需的时间量来确定丢弃的第二量的循环前缀，其可以取决于在UE处的发送定时和接收定时之间的时间推进量。

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