公开(公告)号：US20140334437A1

公开(公告)日：2014-11-13

申请号：US14341941

申请日：2014-07-28

Applicant: Telefonaktiebolaget L M Ericsson (publ)

Inventor： George Jöngren ,  Erik Dahlman

IPC: H04L5/00 ,  H04B7/02

CPC classification number: H04L5/005 ,  H04B7/024 ,  H04L5/0005 ,  H04L5/0007 ,  H04L5/0032 ,  H04L5/0035 ,  H04L5/0053 ,  H04L5/0062 ,  H04L5/0096 ,  H04W72/0406 ,  H04W72/042

Abstract: Methods and apparatus are disclosed for receiving user data in a wireless communication system that employs coordinated multi-point transmission of the user data from a first cell serving a wireless terminal and a second cell site neighboring the first cell site. In an exemplary system, the first cell site maps control signals and user data to a time-frequency resources according to a first mapping pattern, while the second cell site maps control data and traffic data to the time-frequency resources according to a second mapping pattern. An exemplary method comprises extracting user data, according to the first mapping pattern, from time-frequency resources of a first transmission for the wireless terminal transmitted from the first cell site; detecting a control element transmitted by one of the first and second cell sites, the control element indicating that user data associated with the control element is mapped to the time-frequency resources according to the second mapping pattern; and, responsive to said detecting, extracting user data according to the second mapping pattern from time-frequency resources of a second transmission for the wireless terminal transmitted from the second cell site.

Abstract translation: 公开了用于在无线通信系统中接收用户数据的方法和装置，该无线通信系统采用来自服务于无线终端的第一小区和与第一小区站点相邻的第二小区站点的用户数据的协调多点传输。 在示例性系统中，第一小区站点根据第一映射模式将控制信号和用户数据映射到时间 - 频率资源，而第二小区站点根据第二映射将控制数据和业务数据映射到时间 - 频率资源 模式。 一种示例性方法包括根据第一映射模式从第一小区站点发送的无线终端的第一传输的时间 - 频率资源提取用户数据; 检测由所述第一和第二小区站点之一发送的控制单元，所述控制单元指示与所述控制单元相关联的用户数据根据所述第二映射模式映射到所述时间 - 频率资源; 并且响应于所述检测，从所述第二小区站点发送的所述无线终端的第二传输的时间 - 频率资源中，根据所述第二映射模式提取用户数据。

公开(公告)号：US20140233539A1

公开(公告)日：2014-08-21

申请号：US14262057

申请日：2014-04-25

Applicant: Telefonaktiebolaget L M Ericsson (publ)

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

IPC: H04W72/12 ,  H04W52/24

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提供，单独或与宏节点组合。

公开(公告)号：US20130336421A1

公开(公告)日：2013-12-19

申请号：US13972293

申请日：2013-08-21

Applicant: Telefonaktiebolaget L M Ericsson (publ)

Inventor： Stefan Parkvall ,  Robert Baldemair ,  Erik Dahlman

IPC: H04L27/26

CPC classification number: H04L27/2636

Abstract: The present disclosure relates to a technique for transmitting modulation symbols on multiple frequency resources. A method aspect of this technique includes applying a Discrete Fourier Transform (DFT) coding per set of modulation symbols of two or more sets of modulation symbols, wherein a first set of modulation symbols from the two or more sets of modulation symbols is transmitted on a set of frequency resources handled by the same power amplifier. Then, Orthogonal Frequency Division Multiplexing (OFDM) modulation is applied to the sets of DFT coded modulation symbols to output a first set of OFDM symbols for transmission on the set of frequency resources, and output another set of OFDM symbols for transmission on at least one additional frequency resource distinct from the set of frequency resources. Power amplification is then applied per set of frequency resources at the power amplifier.

Abstract translation: 本公开涉及一种用于在多个频率资源上发送调制符号的技术。 该技术的方法方面包括对每组调制符号的两组或更多组应用对每组调制符号的离散傅里叶变换（DFT）编码，其中来自两组或更多组调制符号的第一组调制符号在 由同一功率放大器处理的一组频率资源。 然后，将正交频分复用（OFDM）调制应用于DFT编码调制符号组，以输出第一组OFDM符号以在该组频率资源上进行传输，并输出另一组OFDM符号以在至少一个 附加频率资源与频率资源集不同。 然后在功率放大器上对每组频率资源施加功率放大。

公开(公告)号：US10425270B2

公开(公告)日：2019-09-24

申请号：US14910286

申请日：2015-11-17

Applicant: Telefonaktiebolaget L M Ericsson (publ)

Inventor： Karl Werner ,  Robert Baldemair ,  Håkan Björkegren ,  Erik Dahlman ,  Stefan Parkvall

IPC: H04L27/32 ,  H04L5/00 ,  H04L27/26 ,  H04L27/02 ,  H04L12/931 ,  H04L5/14 ,  H04L27/14

Abstract: In one aspect, a wireless transmitter forms (1110) a first signal having a first integer number of symbol intervals in each of one or more time intervals of a predetermined length and forms (1120) a second signal having a second integer number of symbol intervals in each of the one or more time intervals of the predetermined length, the second integer number differing from the first integer number. The wireless transmitter simultaneously transmits (1130) the first and second signals in a frequency band, such that the first and second signals are frequency-domain multiplexed in the frequency band and such that a symbol interval starting time in the first signal is aligned with a corresponding symbol interval starting time in the second signal at least once per time interval.

公开(公告)号：US09860929B2

公开(公告)日：2018-01-02

申请号：US14424709

申请日：2012-09-18

Applicant: Telefonaktiebolaget L M Ericsson (publ)

Inventor： Leif Wilhelmsson ,  Stefan Parkvall ,  Gabor Fodor ,  Göran N. Klang ,  Erik Dahlman

IPC: H04W76/02 ,  H04W72/04 ,  H04W72/08

CPC classification number: H04W76/14 ,  H04W52/243 ,  H04W52/246 ,  H04W52/26 ,  H04W52/281 ,  H04W72/0473 ,  H04W72/085

Abstract: A method in a first user equipment for adjusting a beacon signal to be detected by at least one second user equipment in a wireless telecommunications network is provided. The beacon signal is transmitted in order to enable an establishment of Device-to-Device, D2D, communication between the first user equipment and the at least one second user equipment. The method is characterized in that the method comprises adjusting, prior to transmitting the beacon signal, the transmit power of the beacon signal based on a requirement of an application in the first user equipment for which the D2D communication is to be established.A user equipment, a network node, and a method in a network node for enabling a D2D communication between a first user equipment and at least one second user equipment are also provided.

公开(公告)号：US09722680B2

公开(公告)日：2017-08-01

申请号：US14759441

申请日：2015-06-25

Applicant: Telefonaktiebolaget L M Ericsson (publ)

Inventor： Karl Werner ,  Robert Baldemair ,  Håkan Björkegren ,  Erik Dahlman ,  Stefan Parkvall

IPC: H04B7/024 ,  H04B7/04 ,  H04B7/0413 ,  H04B7/0426 ,  H04W52/34 ,  H04W72/04 ,  H04W72/14

CPC classification number: H04B7/0465 ,  H04B7/024 ,  H04B7/0413 ,  H04B7/0426 ,  H04W52/34 ,  H04W72/044 ,  H04W72/14

Abstract: For future wireless systems, it is desired to keep network implementation aspects, such as transmission point selection, precoder selection, etc, transparent to the terminal. This means that terminals are envisaged to be unaware of e.g. from which specific network node a transmission is made. This may be referred to as the transparency principle. The proposed solution comprises enabling a receiver to determine a type of antenna association that may be assumed in regard of two blocks of information, based on the result of the decoding of e.g. the first data block. The determination is done in a way such that the principle of transparency is not broken.

公开(公告)号：US20160254839A1

公开(公告)日：2016-09-01

申请号：US15075891

申请日：2016-03-21

Applicant: Telefonaktiebolaget L M Ericsson (publ)

Inventor： Erik Dahlman ,  Ylva Jading ,  Per Skillermark ,  Stefan Parkvall

IPC: H04B1/713 ,  H04L27/26 ,  H04W72/04

CPC classification number: H04B1/713 ,  H04B1/59 ,  H04L5/0007 ,  H04L5/006 ,  H04L27/2627 ,  H04L27/2657 ,  H04W72/042 ,  H04W72/0453 ,  H04W72/1205 ,  H04W88/08

Abstract: Variable bandwidth assignment and frequency hopping are employed to make efficient use of radio resources. Variable bandwidth assignment is achieved by dynamically allocating different numbers of subcarriers to different wireless communication devices depending on their instantaneous channel conditions. The frequency hopping patterns are determined “on-the-fly” based on the current bandwidth assignments. The bandwidth assignments and frequency hopping patterns are signaled to the wireless communication devices in a scheduling grant.

Abstract translation: 采用可变带宽分配和跳频来有效利用无线电资源。 可变带宽分配通过根据其瞬时信道条件向不同的无线通信设备动态分配不同数量的副载波来实现。 基于当前带宽分配来确定跳频模式“即时”。 带宽分配和跳频模式在调度许可中被发送给无线通信设备。

公开(公告)号：US09356739B2

公开(公告)日：2016-05-31

申请号：US14181875

申请日：2014-02-17

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

Inventor： Johan Torsner ,  Janne Peisa ,  Maria Edvardsson ,  Christer Edholm ,  Erik Dahlman ,  Stefan Parkvall

IPC: H04L1/18 ,  H04L1/16 ,  H04L5/00 ,  H04L1/00

CPC classification number: H04L1/1812 ,  H04L1/0007 ,  H04L1/1664 ,  H04L1/189 ,  H04L5/0055

Abstract: A transmitter that may have marginal power availability is enabled to autonomously retransmit previously transmitted frames containing the same data. The transmitter sends an initial frame to a base transceiver station (BTS) and immediately retransmits the same frame without regard to any ACK/NAK transmission from the BTS. The retransmissions are accumulated in the receiver and decoded after a sufficient quantity of the frame is transmitted. After receiving the last retransmitted frame the BTS sends an ACK/NAK to the transmitter that is accepted.

Abstract translation: 可以具有边缘功率可用性的发射机能够自主地重传包含相同数据的先前发送的帧。 发射机向基站收发台（BTS）发送初始帧，并且立即重发相同的帧，而不考虑来自BTS的任何ACK / NAK传输。 在传送足够量的帧之后，重传在接收机中累积并被解码。 在接收到最后一个重传帧之后，BTS向被接收的发射机发送ACK / NAK。

公开(公告)号：US20160112963A1

公开(公告)日：2016-04-21

申请号：US14895157

申请日：2013-07-12

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

Inventor： Chrysostomos Koutsimanis ,  Erik Dahlman

IPC: H04W52/24 ,  H04L5/00 ,  H04W52/26 ,  H04W52/22 ,  H04J11/00

CPC classification number: H04W52/243 ,  H04B7/022 ,  H04J11/0023 ,  H04L5/0048 ,  H04L5/006 ,  H04L5/0062 ,  H04L5/0073 ,  H04L5/0094 ,  H04L25/0204 ,  H04L25/0228 ,  H04W52/22 ,  H04W52/223 ,  H04W52/225 ,  H04W52/267

Abstract: It is presented a method for assisting downlink interference estimation in a cellular network. The method is performed in a network node of the cellular network and comprises the steps of: estimating an average transmit power of the network node in a future time period; transmitting a power parameter based on the estimated average transmit power to at least one wireless device being served by the network node; and transmitting a reference signal for downlink interference estimation. A corresponding network node, wireless device, computer programs and computer program products are also presented.

Abstract translation: 提出了一种在蜂窝网络中辅助下行链路干扰估计的方法。 该方法在蜂窝网络的网络节点中执行，包括以下步骤：估计未来时间段内网络节点的平均发射功率; 基于所估计的平均发送功率向由所述网络节点服务的至少一个无线设备发送功率参数; 并发送用于下行链路干扰估计的参考信号。 还提出了相应的网络节点，无线设备，计算机程序和计算机程序产品。

公开(公告)号：US20160065336A1

公开(公告)日：2016-03-03

申请号：US14938205

申请日：2015-11-11

Applicant: Telefonaktiebolaget L M Ericsson (publ)

Inventor： George Jöngren ,  Erik Dahlman

IPC: H04L5/00 ,  H04W72/04

CPC classification number: H04L5/005 ,  H04B7/024 ,  H04L5/0005 ,  H04L5/0007 ,  H04L5/0032 ,  H04L5/0035 ,  H04L5/0053 ,  H04L5/0062 ,  H04L5/0096 ,  H04W72/0406 ,  H04W72/042

Abstract: Methods and apparatus are disclosed for receiving user data in a wireless communication system that employs coordinated multi-point transmission of the user data from a first cell serving a wireless terminal and a second cell site neighboring the first cell site. In an exemplary system, the first cell site maps control signals and user data to a time-frequency resources according to a first mapping pattern, while the second cell site maps control data and traffic data to the time-frequency resources according to a second mapping pattern. An exemplary method comprises extracting user data, according to the first mapping pattern, from time-frequency resources of a first transmission for the wireless terminal transmitted from the first cell site; detecting a control element transmitted by one of the first and second cell sites, the control element indicating that user data associated with the control element is mapped to the time-frequency resources according to the second mapping pattern; and, responsive to said detecting, extracting user data according to the second mapping pattern from time-frequency resources of a second transmission for the wireless terminal transmitted from the second cell site.

Abstract translation: 公开了用于在无线通信系统中接收用户数据的方法和装置，该无线通信系统采用来自服务于无线终端的第一小区和与第一小区站点相邻的第二小区站点的用户数据的协调多点传输。 在示例性系统中，第一小区站点根据第一映射模式将控制信号和用户数据映射到时间 - 频率资源，而第二小区站点根据第二映射将控制数据和业务数据映射到时间 - 频率资源 模式。 一种示例性方法包括根据第一映射模式从第一小区站点发送的无线终端的第一传输的时间 - 频率资源提取用户数据; 检测由所述第一和第二小区站点之一发送的控制单元，所述控制单元指示与所述控制单元相关联的用户数据根据所述第二映射模式映射到所述时间 - 频率资源; 并且响应于所述检测，从所述第二小区站点发送的所述无线终端的第二传输的时间 - 频率资源中，根据所述第二映射模式提取用户数据。