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1. 发明申请

US20090197603A1 SERVING BASE STATION SELECTION IN A WIRELESS COMMUNICATION NETWORK 有权
标题翻译：在无线通信网络中进行基站选择
公开(公告)号：US20090197603A1
公开(公告)日：2009-08-06
申请号：US12331156
申请日：2008-12-09
申请人： Tingfang Ji , Aamod D. Khandekar , Naga Bhushan , Alexei Y. Gorokhov , Avneesh Agrawal
发明人： Tingfang Ji , Aamod D. Khandekar , Naga Bhushan , Alexei Y. Gorokhov , Avneesh Agrawal
IPC分类号： H04W36/00
CPC分类号： H04W36/0083 , Y02D70/00 , Y02D70/1222 , Y02D70/1242 , Y02D70/1262 , Y02D70/142 , Y02D70/146
摘要： Techniques for selecting a serving base station for a terminal in a wireless communication network are described. In one design, multiple candidate base stations for the terminal may be identified, with each candidate base station being a candidate for selection as the serving base station for the terminal. The multiple candidate base stations may include base stations with different transmit power levels and/or may support interference mitigation. One of the multiple candidate base stations may be selected as the serving base station. In one design, the serving base station may be selected based on at least one metric for each candidate base station. The at least one metrics may be for pathloss, effective transmit power, effective geometry, projected data rate, control channel reliability, network utility, etc. The selected candidate base station may have a lower SINR than a highest SINR among the multiple candidate base stations.
摘要翻译：描述了用于在无线通信网络中为终端选择服务基站的技术。在一种设计中，可以识别用于终端的多个候选基站，其中每个候选基站是用于选择的候选作为终端的服务基站。多个候选基站可以包括具有不同发射功率电平的基站和/或可以支持干扰减轻。可以选择多个候选基站中的一个作为服务基站。在一种设计中，可以基于每个候选基站的至少一个度量来选择服务基站。所述至少一个度量可以用于路径损耗，有效发射功率，有效几何，投影数据速率，控制信道可靠性，网络效用等。所选择的候选基站可以具有比多个候选基站中的最高SINR更低的SINR 。

2. 发明申请

US20100099449A1 INTERFERENCE MANAGEMENT WITH REDUCE INTERFERENCE REQUESTS AND INTERFERENCE INDICATORS 失效
标题翻译：干扰管理减少了干扰要求和干扰指标
公开(公告)号：US20100099449A1
公开(公告)日：2010-04-22
申请号：US12425302
申请日：2009-04-16
申请人： Mohammad J. Borran , Avneesh Agrawal , Aamod D. Khandekar , Alexei Y. Gorokhov , Naga Bhushan , Tingfang Ji
发明人： Mohammad J. Borran , Avneesh Agrawal , Aamod D. Khandekar , Alexei Y. Gorokhov , Naga Bhushan , Tingfang Ji
IPC分类号： H04B15/00 , H04B7/00
CPC分类号： H04W52/243 , H04W72/08
摘要： Techniques for managing interference in a wireless network are described. In an aspect, reduce interference requests and interference indicators may be used for interference management to enable operation in scenarios with dominant interferers. In one design, a terminal may receive a reduce interference request from a first base station requesting lower interference on specified time-frequency resources. The terminal may also receive an interference indicator conveying the interference observed by a second base station. The terminal may determine its transmit power based on the reduce interference request and the interference indicator. For example, the terminal may determine an initial transmit power based on the reduce interference request (or the interference indicator) and may adjust the initial transmit power based on the interference indicator (or the reduce interference request) to obtain its transmit power. The terminal may transmit data to a serving base station at the determined transmit power.
摘要翻译：描述了用于管理无线网络中的干扰的技术。在一个方面，减少干扰请求和干扰指示符可以用于干扰管理，以使得能够在具有主要干扰源的情况下进行操作。在一种设计中，终端可以从指定的时间 - 频率资源上请求较低干扰的第一基站接收减少干扰请求。终端还可以接收传达由第二基站观测到的干扰的干扰指示符。终端可以基于减少干扰请求和干扰指示符来确定其发射功率。例如，终端可以基于减少干扰请求（或干扰指示符）来确定初始发射功率，并且可以基于干扰指示符（或减少干扰请求）来调整初始发射功率以获得其发射功率。终端可以以所确定的发射功率向服务基站发送数据。

3. 发明申请

US20100099428A1 NULL PILOTS FOR INTERFERENCE ESTIMATION IN A WIRELESS COMMUNICATION NETWORK 有权
标题翻译：用于无线通信网络干扰估计的空值
公开(公告)号：US20100099428A1
公开(公告)日：2010-04-22
申请号：US12425243
申请日：2009-04-16
申请人： Naga Bhushan , Alexei Y. Gorokhov , Mohammad J. Borran , Avneesh Agrawal , Aamod D. Khandekar , Tingfang Ji
发明人： Naga Bhushan , Alexei Y. Gorokhov , Mohammad J. Borran , Avneesh Agrawal , Aamod D. Khandekar , Tingfang Ji
IPC分类号： H04W72/00 , H04B15/00
CPC分类号： H04W72/082 , H04J11/0059 , H04L5/0007 , H04L5/0035 , H04L5/0048 , H04W24/08
摘要： Techniques for transmitting null pilots to support interference estimation in a wireless network are described. A null pilot is non-transmission on designated time-frequency resources by a cell or a cluster of cells supporting cooperative transmission to a UE. The received power of the null pilot from the cell or cluster of cells may be indicative of interference from other cells. In one design, a cell in the cluster may determine resources for sending a null pilot by the cell. The cell may transmit the null pilot (i.e., send no transmissions) on the resources to allow UEs to estimate out-of-cluster interference. Some or all cells in the cluster may transmit null pilots on the same resources. The cell may receive interference and channel information from the UE and may send data transmission to the UE based on the interference and/or channel information. Remaining cells in the cluster may reduce interference to the UE.
摘要翻译：描述了用于发送空导频以支持无线网络中的干扰估计的技术。空导频是通过支持向UE的协作传输的小区或小区集群在指定的时间 - 频率资源上进行非传输。来自小区或小区簇的空导频的接收功率可以指示来自其他小区的干扰。在一种设计中，集群中的小区可以确定用于由小区发送空导频的资源。小区可以在资源上发送空导频（即，不发送传输），以允许UE估计簇外干扰。集群中的一些或所有单元可以在相同的资源上传输空导频。小区可以从UE接收干扰和信道信息，并且可以基于干扰和/或信道信息向UE发送数据传输。群集中的剩余小区可以减少对UE的干扰。

4. 发明申请

US20090201826A1 SEGMENT SENSITIVE SCHEDULING 有权
标题翻译：分部敏感调度
公开(公告)号：US20090201826A1
公开(公告)日：2009-08-13
申请号：US12388414
申请日：2009-02-18
申请人： Alexei Y. Gorokhov , Tingfang Ji
发明人： Alexei Y. Gorokhov , Tingfang Ji
IPC分类号： H04J1/16 , H04W72/04
CPC分类号： H04L5/006 , H04L1/0002 , H04L1/0009 , H04L1/0026 , H04L1/1812 , H04L5/0007 , H04L5/0044 , H04L5/0048 , H04L5/0057 , H04L5/0064 , H04L5/1438 , H04L25/0398
摘要： Systems and methods of scheduling sub-carriers in an OFDMA system in which a scheduler takes into account channel conditions experienced by the communication devices to optimize channel conditions. The scheduler can partition a set of sub-carriers spanning an operating bandwidth into a plurality of segments. The segments can include a plurality of global segments that each includes a distinct non-contiguous subset of the sub-carriers spanning substantially the entire operating bandwidth. One or more of the global segments can be further partitioned into a plurality of local segments that each has a bandwidth that is less than a channel coherence bandwidth. The scheduler determines channel characteristics experienced by each communication device via reporting or channel estimation, and allocates one or more segments to communication links for each device according to the channel characteristics.
摘要翻译：在OFDMA系统中调度子载波的系统和方法，其中调度器考虑通信设备经历的信道条件以优化信道状况。调度器可以将跨越工作带宽的一组子载波划分成多个段。这些段可以包括多个全局段，每个全局段包括基本上跨整个工作带宽的子载波的不同的非连续子集。一个或多个全局段可被进一步分割成多个本地段，每个本地段具有小于信道相干带宽的带宽。调度器通过报告或信道估计来确定每个通信设备经历的信道特征，并根据信道特性为每个设备的通信链路分配一个或多个分段。

5. 发明授权

US08521206B2 Interference management with reduce interference requests and interference indicators 失效
标题翻译：干扰管理与减少干扰请求和干扰指标
公开(公告)号：US08521206B2
公开(公告)日：2013-08-27
申请号：US12425302
申请日：2009-04-16
申请人： Mohammad J. Borran , Avneesh Agrawal , Aamod D. Khandekar , Alexei Y. Gorokhov , Naga Bhushan , Tingfang Ji
发明人： Mohammad J. Borran , Avneesh Agrawal , Aamod D. Khandekar , Alexei Y. Gorokhov , Naga Bhushan , Tingfang Ji
IPC分类号： H04B7/00
CPC分类号： H04W52/243 , H04W72/08
摘要： Techniques for managing interference in a wireless network are described. In an aspect, reduce interference requests and interference indicators may be used for interference management to enable operation in scenarios with dominant interferers. In one design, a terminal may receive a reduce interference request from a first base station requesting lower interference on specified time-frequency resources. The terminal may also receive an interference indicator conveying the interference observed by a second base station. The terminal may determine its transmit power based on the reduce interference request and the interference indicator. For example, the terminal may determine an initial transmit power based on the reduce interference request (or the interference indicator) and may adjust the initial transmit power based on the interference indicator (or the reduce interference request) to obtain its transmit power. The terminal may transmit data to a serving base station at the determined transmit power.
摘要翻译：描述了用于管理无线网络中的干扰的技术。在一个方面，减少干扰请求和干扰指示符可以用于干扰管理，以使得能够在具有主要干扰源的情况下进行操作。在一种设计中，终端可以从指定的时间 - 频率资源请求较低干扰的第一基站接收减少干扰请求。终端还可以接收传达由第二基站观测到的干扰的干扰指示符。终端可以基于减少干扰请求和干扰指示符来确定其发射功率。例如，终端可以基于减少干扰请求（或干扰指示符）来确定初始发射功率，并且可以基于干扰指示符（或减少干扰请求）来调整初始发射功率以获得其发射功率。终端可以以所确定的发射功率向服务基站发送数据。

6. 发明授权

US09246659B2 Segment sensitive scheduling 有权
公开(公告)号：US09246659B2
公开(公告)日：2016-01-26
申请号：US12388414
申请日：2009-02-18
申请人： Alexei Y. Gorokhov , Tingfang Ji
发明人： Alexei Y. Gorokhov , Tingfang Ji
IPC分类号： H04B3/10 , H04L5/00 , H04L5/14 , H04L1/00 , H04L1/18 , H04L25/03
CPC分类号： H04L5/006 , H04L1/0002 , H04L1/0009 , H04L1/0026 , H04L1/1812 , H04L5/0007 , H04L5/0044 , H04L5/0048 , H04L5/0057 , H04L5/0064 , H04L5/1438 , H04L25/0398
摘要： Systems and methods of scheduling sub-carriers in an OFDMA system in which a scheduler takes into account channel conditions experienced by the communication devices to optimize channel conditions. The scheduler can partition a set of sub-carriers spanning an operating bandwidth into a plurality of segments. The segments can include a plurality of global segments that each includes a distinct non-contiguous subset of the sub-carriers spanning substantially the entire operating bandwidth. One or more of the global segments can be further partitioned into a plurality of local segments that each has a bandwidth that is less than a channel coherence bandwidth. The scheduler determines channel characteristics experienced by each communication device via reporting or channel estimation, and allocates one or more segments to communication links for each device according to the channel characteristics.

7. 发明授权

US08559879B2 Null pilots for interference estimation in a wireless communication network 有权
标题翻译：用于无线通信网络中的干扰估计的空导频
公开(公告)号：US08559879B2
公开(公告)日：2013-10-15
申请号：US12425243
申请日：2009-04-16
申请人： Naga Bhushan , Alexei Y. Gorokhov , Mohammad J. Borran , Avneesh Agrawal , Aamod D. Khandekar , Tingfang Ji
发明人： Naga Bhushan , Alexei Y. Gorokhov , Mohammad J. Borran , Avneesh Agrawal , Aamod D. Khandekar , Tingfang Ji
IPC分类号： H04B1/00
CPC分类号： H04W72/082 , H04J11/0059 , H04L5/0007 , H04L5/0035 , H04L5/0048 , H04W24/08
摘要： Techniques for transmitting null pilots to support interference estimation in a wireless network are described. A null pilot is non-transmission on designated time-frequency resources by a cell or a cluster of cells supporting cooperative transmission to a UE. The received power of the null pilot from the cell or cluster of cells may be indicative of interference from other cells. In one design, a cell in the cluster may determine resources for sending a null pilot by the cell. The cell may transmit the null pilot (i.e., send no transmissions) on the resources to allow UEs to estimate out-of-cluster interference. Some or all cells in the cluster may transmit null pilots on the same resources. The cell may receive interference and channel information from the UE and may send data transmission to the UE based on the interference and/or channel information. Remaining cells in the cluster may reduce interference to the UE.
摘要翻译：描述了用于发送空导频以支持无线网络中的干扰估计的技术。空导频是通过支持向UE的协作传输的小区或小区集群在指定的时间 - 频率资源上进行非传输。来自小区或小区簇的空导频的接收功率可以指示来自其他小区的干扰。在一种设计中，集群中的小区可以确定用于由小区发送空导频的资源。小区可以在资源上发送空导频（即，不发送传输），以允许UE估计簇外干扰。集群中的一些或所有单元可以在相同的资源上传输空导频。小区可以从UE接收干扰和信道信息，并且可以基于干扰和/或信道信息向UE发送数据传输。群集中的剩余小区可以减少对UE的干扰。

8. 发明申请

US20090201872A1 SEGMENT SENSITIVE SCHEDULING 有权
公开(公告)号：US20090201872A1
公开(公告)日：2009-08-13
申请号：US12372954
申请日：2009-02-18
申请人： Alexei Y. Gorokhov , Tingfang Ji
发明人： Alexei Y. Gorokhov , Tingfang Ji
IPC分类号： H04W72/04 , H04L27/28
CPC分类号： H04L5/006 , H04L1/0002 , H04L1/0009 , H04L1/0026 , H04L1/1812 , H04L5/0007 , H04L5/0044 , H04L5/0048 , H04L5/0057 , H04L5/0064 , H04L5/1438 , H04L25/0398
摘要： Systems and methods of scheduling sub-carriers in an OFDMA system in which a scheduler takes into account channel conditions experienced by the communication devices to optimize channel conditions. The scheduler can partition a set of sub-carriers spanning an operating bandwidth into a plurality of segments. The segments can include a plurality of global segments that each includes a distinct non-contiguous subset of the sub-carriers spanning substantially the entire operating bandwidth. One or more of the global segments can be further partitioned into a plurality of local segments that each has a bandwidth that is less than a channel coherence bandwidth. The scheduler determines channel characteristics experienced by each communication device via reporting or channel estimation, and allocates one or more segments to communication links for each device according to the channel characteristics.

9. 发明授权

US09240877B2 Segment sensitive scheduling 有权
公开(公告)号：US09240877B2
公开(公告)日：2016-01-19
申请号：US12372954
申请日：2009-02-18
申请人： Alexei Y. Gorokhov , Tingfang Ji
发明人： Alexei Y. Gorokhov , Tingfang Ji
IPC分类号： H04W4/00 , H04L12/26 , H04Q11/02 , H04L5/00 , H04L5/14 , H04L1/00 , H04L1/18 , H04L25/03
CPC分类号： H04L5/006 , H04L1/0002 , H04L1/0009 , H04L1/0026 , H04L1/1812 , H04L5/0007 , H04L5/0044 , H04L5/0048 , H04L5/0057 , H04L5/0064 , H04L5/1438 , H04L25/0398
摘要： Systems and methods of scheduling sub-carriers in an OFDMA system in which a scheduler takes into account channel conditions experienced by the communication devices to optimize channel conditions. The scheduler can partition a set of sub-carriers spanning an operating bandwidth into a plurality of segments. The segments can include a plurality of global segments that each includes a distinct non-contiguous subset of the sub-carriers spanning substantially the entire operating bandwidth. One or more of the global segments can be further partitioned into a plurality of local segments that each has a bandwidth that is less than a channel coherence bandwidth. The scheduler determines channel characteristics experienced by each communication device via reporting or channel estimation, and allocates one or more segments to communication links for each device according to the channel characteristics.

10. 发明授权

US08897269B2 Method and apparatus for mitigating pilot pollution in a wireless network 有权
标题翻译：用于减轻无线网络中导频污染的方法和装置
公开(公告)号：US08897269B2
公开(公告)日：2014-11-25
申请号：US12359992
申请日：2009-01-26
申请人： Tingfang Ji , Avneesh Agrawal , Alexei Y. Gorokhov
发明人： Tingfang Ji , Avneesh Agrawal , Alexei Y. Gorokhov
IPC分类号： H04J3/00 , H04L5/00 , H04W52/32 , H04W52/24 , H04W52/34 , H04L1/00 , H04L25/02 , H04L1/18
CPC分类号： H04L5/0048 , H04L1/0004 , H04L1/001 , H04L1/0026 , H04L1/1812 , H04L5/0044 , H04L5/005 , H04L5/0053 , H04L5/0057 , H04L5/006 , H04L5/0062 , H04L25/0224 , H04W52/241 , H04W52/243 , H04W52/325 , H04W52/343
摘要： Techniques for mitigating pilot pollution in a wireless network are described. In an aspect, pilot pollution may be mitigated by reducing density and/or transmit power of common pilots whenever possible. A cell may send a common pilot at a first density and a first transmit power level during a first time period and may send the common pilot at a second density and a second transmit power level during a second time period. The second density may be lower than the first density and/or the second transmit power level may be lower than the first transmit power level. Lower density may be achieved by sending the common pilot less frequently, on fewer subcarriers, and/or from fewer antennas. The cell may determine whether to reduce the density and/or transmit power of the common pilot based on network loading, SINRs of terminals, etc. In another aspect, pilot pollution may be mitigated by performing pilot cancellation at a terminal.
摘要翻译：描述了减轻无线网络中导频污染的技术。在一方面，可能通过尽可能减少公共飞行员的密度和/或发射功率来减轻飞行员污染。小区可以在第一时间段期间以第一密度和第一发射功率电平发送公共导频，并且可以在第二时间段期间以第二密度和第二发射功率电平发送公共导频。第二密度可以低于第一密度，和/或第二发射功率电平可能低于第一发射功率电平。较低的密度可以通过在较少的子载波上和/或从更少的天线较少频率地发送公共导频来实现。小区可以基于网络负载，终端的SINR等来确定是否降低公共导频的密度和/或发射功率。另一方面，可以通过在终端执行导频消除来减轻导频污染。

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