公开(公告)号：US09603101B2

公开(公告)日：2017-03-21

申请号：US14385954

申请日：2012-03-21

Applicant: Stefan Parkvall ,  David Astely ,  Erik Dahlman ,  Pal Frenger

Inventor： Stefan Parkvall ,  David Astely ,  Erik Dahlman ,  Pal Frenger

IPC: H04W4/00 ,  H04W52/18 ,  H04W24/02 ,  H04W16/32 ,  H04W48/12 ,  H04W84/04

CPC classification number: H04W52/18 ,  H04W16/32 ,  H04W24/02 ,  H04W48/12 ,  H04W84/045

Abstract: A technique for operating a network node in a heterogeneously deployed network comprising network nodes of different nominal transmit powers and at least partially overlapping coverage areas is described. A method implementation of this technique comprises a step of operating the network node in a base mode in which the network node is configured to transmit terminal-specific demodulation reference signals for a first set of terminal devices. The method comprises the further step of selectively activating or deactivating operation of the network node in a Single Frequency Network (SFN) mode in which the network node is configured to transmit, for a second set of terminal devices, the same cell-specific reference nodes as another network node of the heterogeneously deployed network that has a larger nominal transmit power.

公开(公告)号：US09596019B2

公开(公告)日：2017-03-14

申请号：US12992921

申请日：2008-05-28

Applicant: Henrik Asplund ,  David Astely ,  Johan Nystrom ,  Tobias Tynderfeldt

Inventor： Henrik Asplund ,  David Astely ,  Johan Nystrom ,  Tobias Tynderfeldt

IPC: H04B1/38 ,  H04B7/10 ,  H01Q1/24 ,  H01Q21/24 ,  H04L5/04 ,  H04L5/06

CPC classification number: H04B7/10 ,  H01Q1/246 ,  H01Q21/24 ,  H04L5/04 ,  H04L5/06

Abstract: The present invention relates to a group (G1, G2) of at least two transceiver units (1, 2; 3, 4) in at least one wireless communication system. The transceiver units (1, 2; 3, 4) in the group (G1, G2) are arranged for wireless communication with at least one other transceiver unit. The transceiver units (1, 2; 3, 4) in the group (G1, G2) are arranged to transmit signals with polarizations that are essentially parallel to each other when received by at least one transceiver unit for which the transmitted signals (5, 6) constitutes interference.The present invention also relates to a method, a node and a transceiver unit.

Abstract translation: 本发明还涉及一种方法，节点和收发机单元。

公开(公告)号：US09565696B2

公开(公告)日：2017-02-07

申请号：US13370649

申请日：2012-02-10

Applicant: Ali Behravan ,  David Astely ,  George Jöngren

Inventor： Ali Behravan ,  David Astely ,  George Jöngren

IPC: H04W72/12 ,  H04L5/00 ,  H04L27/26 ,  H04W72/04 ,  H04W74/00 ,  H04L25/02

CPC classification number: H04W72/1289 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0092 ,  H04L5/0094 ,  H04L25/0224 ,  H04L27/2611 ,  H04W72/042 ,  H04W72/14 ,  H04W74/006

Abstract: The present invention relates to methods and apparatus for providing a more flexible configuration of sounding reference signal, SRS, transmission. This is achieved by dynamically triggering a mobile terminal to transmit SRS. Thus, embodiments of the invention include a method implemented by a base station in a communications network that semi-statically configures some uplink symbols for periodic SRS transmission and other uplink symbols for aperiodic SRS transmission. The method includes dynamically determining whether an uplink symbol that has been semi-statically configured for aperiodic SRS transmission is to be used by a given mobile terminal at a given time for SRS transmission. The method then further includes signaling a terminal-specific instruction that indicates said determination to the given mobile terminal.

Abstract translation: 本发明涉及用于提供更灵活的探测参考信号SRS传输配置的方法和装置。 这通过动态触发移动终端来发送SRS来实现。 因此，本发明的实施例包括由通信网络中的基站实现的方法，其中半静态地配置用于周期性SRS传输的一些上行链路符号以及用于非周期SRS传输的其他上行链路符号。 该方法包括动态地确定给定移动终端在给定时间是否使用用于非周期性SRS传输的半静态配置的上行链路符号用于SRS传输。 该方法然后还包括向给定的移动终端发信号通知指示所述确定的终端专用指令。

公开(公告)号：US08908789B2

公开(公告)日：2014-12-09

申请号：US13520880

申请日：2010-01-12

Applicant: Yang Hu ,  David Astely ,  Xinghua Song ,  Jianfeng Wang

Inventor： Yang Hu ,  David Astely ,  Xinghua Song ,  Jianfeng Wang

IPC: H04L1/02 ,  H04L5/00 ,  H04L25/02

CPC classification number: H04L25/0226 ,  H04B7/0413 ,  H04B7/0678 ,  H04L5/0016 ,  H04L5/0023 ,  H04L5/005 ,  H04L5/0051 ,  H04L5/1469 ,  H04L25/0204 ,  H04L25/0224

Abstract: The prevent invention provides a method for performing channel estimation and detection in a Multiple-Input-Multiple-Output (MIMO) system, including: generating a demodulation reference signal, DM-RS, pattern for an extended cyclic prefix (CP); and estimating and detecting channel performance based on the generated DM-RS signal pattern. The DM-RS pattern supports from rank 1 to rank 8 patterns for 8 layer transmission. A transmitter, a receiver and a system thereof are also provided. The solution of the present invention improves channel estimation accuracy, saves channel estimation implementation and implementation complexity at terminals.

Abstract translation: 防止发明提供了一种在多输入多输出（MIMO）系统中执行信道估计和检测的方法，包括：产生用于扩展循环前缀（CP）的解调参考信号DM-RS，模式; 以及基于所生成的DM-RS信号模式来估计和检测信道性能。 DM-RS模式支持8层传输从1级到8级模式。 还提供发射机，接收机及其系统。 本发明的解决方案提高了信道估计精度，节省了终端的信道估计实现和实现复杂度。

公开(公告)号：US08817719B2

公开(公告)日：2014-08-26

申请号：US13256595

申请日：2010-06-18

Applicant: Ali Behravan ,  David Astely ,  George Jöngren

Inventor： Ali Behravan ,  David Astely ,  George Jöngren

IPC: H04W72/04 ,  H04W72/12 ,  H04W74/00 ,  H04L5/00 ,  H04W56/00 ,  H04L25/02

CPC classification number: H04W72/1289 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0092 ,  H04L5/0094 ,  H04L25/0224 ,  H04L27/2611 ,  H04W72/042 ,  H04W72/14 ,  H04W74/006

Abstract: The present invention relates to methods and arrangements for providing a more flexible configuration of SRS transmission. This is achieved by dynamically triggering a mobile terminal to transmit SRS. Thus, embodiments of the invention allow dynamically trigged SRS in any uplink subframe, even without necessarily reserving resources semi-statically on cell level. This is done by signaling to the terminal whether the mobile terminal should leave the predefined uplink symbol empty for sounding reference signals or use it for data transmission. In case a terminal leaves the last symbol empty for sounding reference signals, there are two possibilities, either the UE shall transmit one or several reference signals from one or several antennas, or the terminal shall leave the last symbol blank since another terminal may be using the resource for sounding. Accordingly, in a specific embodiment, there are at least three different messages that can be conveyed to the terminal: use the predefined uplink symbol for data, leave it blank or use it for sounding reference signals.

Abstract translation: 本发明涉及用于提供更灵活的SRS传输配置的方法和装置。 这通过动态触发移动终端来发送SRS来实现。 因此，本发明的实施例允许在任何上行链路子帧中动态触发SRS，甚至不必在小区级别上半静态地保留资源。 这通过向终端发信号完成，移动终端是否应该将预定义的上行链路符号留空以用于探测参考信号或者将其用于数据传输。 在终端将最后一个符号留空以用于探测参考信号的情况下，存在两种可能性：UE应该从一个或多个天线发射一个或多个参考信号，或者终端应该将最后一个符号留空，因为另一个终端可能正在使用 侦听资源。 因此，在具体实施例中，存在可以传送到终端的至少三个不同的消息：使用预定义的上行链路符号用于数据，将其留空或用于探测参考信号。

公开(公告)号：US08744468B2

公开(公告)日：2014-06-03

申请号：US13640337

申请日：2012-07-30

Applicant: Stefan Parkvall ,  David Astely ,  Erik Dahlman ,  David Hammarwall ,  Bengt Lindoff ,  Stefano Sorrentino ,  Leif Wilhelmsson

Inventor： Stefan Parkvall ,  David Astely ,  Erik Dahlman ,  David Hammarwall ,  Bengt Lindoff ,  Stefano Sorrentino ,  Leif Wilhelmsson

IPC: H04W72/04

CPC classification number: H04W72/1231 ,  H04W52/143 ,  H04W52/244 ,  H04W72/0446 ,  Y02D70/00

Abstract: In a heterogeneous cell deployment a mobile terminal may need to receive control data transmissions from a macro node at the same time as a pico node is transmitting user data for the mobile terminal, using the same frequency or set of frequencies. This can result in a problematic interference situation. According to several embodiments of the present invention, at least one of two general approaches is used to mitigate the interference situation described above. In a first approach, the pico node's transmission power is reduced in some time intervals, thereby reducing the interference to a level where reception from the macro node is possible. In a second approach, which may be combined with the first approach in some cases, the data transmitted from the macro node is provided by the pico node, either alone or in combination with the macro node.

Abstract translation: 在异构小区部署中，移动终端可能需要在微微节点正在使用相同的频率或频率集合为移动终端发送用户数据的同时从宏节点接收控制数据传输。 这可能导致有问题的干扰情况。 根据本发明的几个实施例，使用两种一般方法中的至少一种来减轻上述干扰情况。 在第一种方法中，微微节点的传输功率在一些时间间隔内减小，从而将干扰降低到可能从宏节点接收的水平。 在一些可能与第一种方法组合的第二种方法中，从宏节点发送的数据由微微节点单独提供，或与宏节点组合。

公开(公告)号：US08699375B2

公开(公告)日：2014-04-15

申请号：US13617555

申请日：2012-09-14

Applicant: Tobias Tynderfeldt ,  David Astely ,  Stefan Parkvall ,  Johan Torsner

Inventor： Tobias Tynderfeldt ,  David Astely ,  Stefan Parkvall ,  Johan Torsner

IPC: H04J1/16

CPC classification number: H04L1/1607 ,  H04L1/0027 ,  H04L1/0029 ,  H04L1/0032 ,  H04L1/0034 ,  H04L1/0038 ,  H04L1/1854

Abstract: Method and apparatus for conveying feedback reports from a data receiving party (300) for data received from a data sending party (302) in a wireless connection. A plurality of feedback resources (304) assigned to different feedback information codes are allocated to the data receiving party for transmitting feedback reports. After checking whether the data was received correctly or not, the data receiving party selects a feedback resource (FR2) with a feedback information code that corresponds to one or more feedback reports on the received data. The data receiving party then sends feedback information on the selected feedback resource to the data sending party, thereby conveying the corresponding feedback information code. In this way, multiple feedback reports can be conveyed in a single feedback resource to the data sending party while still retaining single carrier properties.

Abstract translation: 从数据接收方（300）传送用于在无线连接中从数据发送方（302）接收的数据的反馈报告的方法和装置。 分配给不同反馈信息码的多个反馈资源（304）被分配给用于发送反馈报告的数据接收方。 在检查数据是否被正确接收之后，数据接收方使用与接收到的数据的一个或多个反馈报告相对应的反馈信息码来选择反馈资源（FR2）。 然后，数据接收方将所选择的反馈资源的反馈信息发送给数据发送方，从而传送相应的反馈信息码。 以这种方式，多个反馈报告可以在单个反馈资源中传达给数据发送方，同时仍然保留单载波属性。

公开(公告)号：US20140056190A1

公开(公告)日：2014-02-27

申请号：US14110164

申请日：2011-04-08

Applicant: Yu Qian ,  David Astely ,  Ali Behravan ,  Jiansong Gan

Inventor： Yu Qian ,  David Astely ,  Ali Behravan ,  Jiansong Gan

IPC: H04W24/02

CPC classification number: H04W24/02 ,  H04B7/2656 ,  H04L1/205 ,  H04W28/04 ,  H04W88/08

Abstract: A first base station (14) in a wireless communication system (10) operating according to a synchronised time division scheme detects interference of uplink communication, determines the delay of the interference in relation to an own communication structure (CS1), detects aerial interface identifying data of the source of interference identifying a further base station and sends an indication of the further base station interfering uplink communication to the interference handling node (22). The indication is accompanied by identification data comprising aerial interface identifying data of the further base station and distance data determining the distance (D1) between the first and the further base station. The interference handling node (37) receives the indication with accompanying identification data, investigates the identification data in order to determine the identity of a candidate for the further base station and orders the candidate base station to perform an interference limitation activity.

Abstract translation: 根据同步时分方式操作的无线通信系统（10）中的第一基站（14）检测上行链路通信的干扰，确定相对于自身的通信结构（CS1）的干扰的延迟，检测空中接口识别 识别另一基站的干扰源的数据，并向干扰处理节点（22）发送进一步的基站干扰上行链路通信的指示。 该指示伴随有识别数据，其包括另外的基站的空中接口标识数据和确定第一和另外的基站之间的距离（D1）的距离数据。 干扰处理节点（37）用附带的识别数据接收指示，调查识别数据，以便确定另外基站的候选者的身份，并命令候选基站执行干扰限制活动。

公开(公告)号：US08509122B2

公开(公告)日：2013-08-13

申请号：US12523134

申请日：2007-01-16

Applicant: David Astely ,  Hannes Ekström ,  Alireza Nejatian ,  Per Skillermark ,  Tobias Tynderfeldt ,  Erik Lars Westerberg

Inventor： David Astely ,  Hannes Ekström ,  Alireza Nejatian ,  Per Skillermark ,  Tobias Tynderfeldt ,  Erik Lars Westerberg

IPC: H04L5/14 ,  H04J3/00 ,  H04J3/06 ,  H04L12/26 ,  H04L12/56

CPC classification number: H04W72/1231 ,  H04W52/267 ,  H04W56/003

Abstract: The invention discloses a method (800) for use in a cellular wireless system (100) with a base station (120), a cell (110) in the system and a first user terminal (130) which can be scheduled for receiving traffic from the base station during a down link period, and for transmitting traffic to the base station during an up link period. There is a first guard period (TUD) between the up link period and the down link period, and a second guard period (TDU) between the down link period and the up link period. The method (800) comprises measuring the interference level in the cell for part of the time between two consecutive down link periods, and varying at least one of the following in accordance with the measured interference level: the duration of the first or second guard period, the duration of the up link period, or the traffic sent in the up link period.

Abstract translation: 本发明公开了一种在具有基站（120），系统中的小区（110）和第一用户终端（130）的蜂窝无线系统（100）中使用的方法（800），所述第一用户终端可被调度为从 在下行链路周期期间的基站，并且用于在上行链路周期期间向基站发送业务。 在上行链路周期和下行链路周期之间存在第一保护周期（TUD）和下行链路周期与上行链路周期之间的第二保护周期（TDU）。 方法（800）包括在两个连续的下行链路周期之间的部分时间内测量小区中的干扰电平，并且根据所测量的干扰电平来改变以下中的至少一个：第一或第二保护周期的持续时间 ，上行链路周期的持续时间，或在上行链路周期中发送的流量。

公开(公告)号：US08401485B2

公开(公告)日：2013-03-19

申请号：US12522794

申请日：2008-02-06

Applicant: George Jöngren ,  David Astely ,  Bo Göransson ,  Jonas B. Karlsson

Inventor： George Jöngren ,  David Astely ,  Bo Göransson ,  Jonas B. Karlsson

IPC: H04B17/00

CPC classification number: H04B17/24 ,  H04B17/21

Abstract: A device system, computer medium and method for calibrating at least one impairment of a signal transmitted from a transmitting unit to a receiving unit, the method including receiving at the receiving unit at least two signals transmitted from the transmitting unit, estimating at the receiving unit, based on the received at least two signals, at least one parameter associated with transmit chain links between the transmitting unit and corresponding antennas of the transmitting unit, collecting the at least one parameter in a measurement report at the receiving unit, and transmitting the measurement report from the receiving unit for correcting the at least one impairment based on the at least one parameter.

Abstract translation: 一种用于校准从发送单元发送到接收单元的信号的至少一个损害的设备系统，计算机介质和方法，所述方法包括在接收单元处接收从发送单元发送的至少两个信号，在接收单元处估计 基于所接收的至少两个信号，与所述发送单元与所述发送单元的相应天线之间的发送链路链路相关联的至少一个参数，在所述接收单元处收集测量报告中的所述至少一个参数，以及发送所述测量 从所述接收单元报告基于所述至少一个参数来校正所述至少一个损伤。