公开(公告)号：EP1914950A1

公开(公告)日：2008-04-23

申请号：EP08101271.8

申请日：2002-09-13

申请人： IPWireless, Inc.

发明人： Jones, Alan Edward ,  Howard, Paul ,  Armstrong, Robert

IPC分类号： H04L27/00

CPC分类号： H04L27/0014 ,  H04L2027/0028 ,  H04L2027/0065

摘要： A method for automatic frequency correction of an automatic frequency control loop of a wireless communication unit comprises in a first stage (500): receiving a first signal on a first physical channel; producing from the first signal a first frequency estimate; and determining whether the first frequency estimate (Δfk) is below a predetermined threshold (Set_Frequency2). The method further comprises, in a second stage (600) in response to determining that the first frequency estimate (Δfk) is below the predetermined threshold (Set_Frequency2): producing, from the first signal, first and second partial correlation values to be used in frequency correction (pc1, pc2); receiving a second signal comprising a beacon on a second physical channel, and deriving a channel estimate from the beacon. The method further comprises producing, from the derived channel estimate and first and second partial correlation values, a second frequency estimate; and performing frequency correction using the second frequency estimate.

摘要翻译： 一种用于无线通信单元的自动频率控制环路的自动频率校正的方法包括在第一级（500）中：在第一物理信道上接收第一信号; 从第一信号产生第一频率估计; 以及确定第一频率估计（“fk”）是否低于预定阈值（Set_Frequency2）。 响应于确定第一频率估计（“fk”）低于预定阈值（Set_Frequency2），该方法还包括在第二级（600）中：从第一信号产生要使用的第一和第二部分相关值 频率校正（pc1，pc2）; 在第二物理信道上接收包括信标的第二信号，以及从所述信标导出信道估计。 该方法还包括从导出的信道估计和第一和第二部分相关值产生第二频率估计; 以及使用所述第二频率估计来执行频率校正。

公开(公告)号：EP1557016B1

公开(公告)日：2008-01-23

申请号：EP03758356.4

申请日：2003-10-24

申请人： IPWireless, Inc.

发明人： DARWOOD, Peter, Bruce ,  JONES, Alan, Edward

IPC分类号： H04L25/02

CPC分类号： H04L7/042 ,  H04L25/0226

摘要： A method and arrangement (100) for PRACH burst channel detection in a UTRA TDD wireless communication system in which training sequences are constructed from a single periodic base code. Unwanted cross-correlation peaks, having magnitude less than correlation peaks, are removed (440) from the correlator outputs, maintaining optimal signal-to-noise ratio of the channel estimates, providing a low probability of false detection, and extending the cell size of a CDMA network to that determined by the guard period duration. The cell size can be extended further by ensuring that no transmissions are scheduled for the timeslot subsequent to that in which the channel estimation bursts are scheduled.

公开(公告)号：EP1806853A2

公开(公告)日：2007-07-11

申请号：EP07107157.5

申请日：2002-12-05

申请人： IPWireless, Inc.

发明人： Anderson, Nicholas

IPC分类号： H04B7/005

CPC分类号： H04W52/265 ,  H04W52/12 ,  H04W52/20 ,  H04W52/267 ,  H04W52/30

摘要： A method for selecting a transport format to transmit messages in a wireless communication system. The method includes the steps of obtaining (620) transmission information from a wireless subscriber unit, and modifying a communication channel format (660) in response to said transmission information. Preferably, the transmission information is retransmission requests from a wireless subscriber unit, which are transmitted frequently.

摘要翻译： 一种用于在无线通信系统中选择传输消息的传输格式的方法。 该方法包括以下步骤：从无线用户单元获取（620）传输信息，以及响应于所述传输信息修改通信信道格式（660）。 优选地，发送信息是经常发送的来自无线用户单元的重发请求。

公开(公告)号：EP1757134A1

公开(公告)日：2007-02-28

申请号：EP05740112.7

申请日：2005-04-07

申请人： IPWireless, Inc.

发明人： LEGG, Peter Jonathon

IPC分类号： H04Q7/36 ,  H04B7/26

CPC分类号： H04W72/0446 ,  H04B7/2656 ,  H04L5/14 ,  H04W24/00 ,  H04W72/06

摘要： A dynamic channel assignment scheme for a TDD radio communication system (100) with coexisting dedicated (230; 240) and shared (210; 220) channels has segregated dedicated and shared channel mechanisms. Up to nDL DCH MAX / nUL DCH MAX dedicated downlink / uplink channel slots are granted, with the remainder of slots for shared channels. These maximum numbers accommodate the needs of conversational and streaming class traffic carried on shared channels. New slots can be claimed for dedicated channels (subject to this maximum) as required, taking the shared channel slot with the smallest timeslot. If the last DCH allocation in a slot is ended, the slot is freed for DSCH / USCH usage.

公开(公告)号：EP1627467A1

公开(公告)日：2006-02-22

申请号：EP04733378.6

申请日：2004-05-17

申请人： IPWireless, Inc.

发明人： HOWARD, Paul

IPC分类号： H03J7/02 ,  H04L27/00 ,  H04L7/02

CPC分类号： H04L27/2272 ,  H03J7/02 ,  H04L2027/0081

摘要： An arrangement (900), method and unit for AFC in a communication system (100) having: a frequency estimator (980) producing a decision-directed frequency estimate from a received signal; and an AFC loop receiving the decision-directed frequency estimate and performing therewith frequency control. The AFC process may use a CRC-decision directed frequency estimate as the final stage in a multi-stage AFC process (preceded by SCH- and midamble-derived frequency estimate stages), such that a verified received data sequence is used to re-construct a local copy of the ideal received data symbols expected at the output of a detector. This local copy is then correlated with the actual detector output and the results used to estimate the frequency error present on the received signal. The AFC process is inherent suited for discontinuous receive (DRX) applications. This provides the advantage of allowing required frequency correction accuracy to have minimal impact on the error rate of the received data in various channel configurations.

公开(公告)号：EP1552660A1

公开(公告)日：2005-07-13

申请号：EP03748362.5

申请日：2003-10-08

申请人： IPWireless, Inc.

发明人： WILLIAMS, Andrew Gordon ,  PARKER, Andrew

IPC分类号： H04L29/06 ,  H04Q7/38

CPC分类号： H04L63/0853 ,  H04L63/0892 ,  H04L63/1466 ,  H04L67/04 ,  H04W12/06 ,  H04W12/12

摘要： System (FIG. 2) and method for use of internet authentication technology to provide UMTS authentication. An SGSN (260) in an Integrated Network Contoroller (240) in a UMTS network and a RADIUS server (270) are adapted to support signalling therebetween whereby authentication of a USIM is performed in the RADIUS Server. This allows a conventional Authorisation Centre (AuC) to replaced by the RADIUS Server, and it is substantially cheaper, because it is based largely on existing off-the-shelf Internet access authentication technology, modified to this purpose.

公开(公告)号：EP1490983A1

公开(公告)日：2004-12-29

申请号：EP02788078.0

申请日：2002-12-05

申请人： IPWireless, Inc.

发明人： ANDERSON, Nicholas William

IPC分类号： H04B7/005

CPC分类号： H04W52/265 ,  H04W52/12 ,  H04W52/20 ,  H04W52/267 ,  H04W52/30

摘要： A method for setting a power control level (600) in a wireless communication system. The method includes the steps of obtaining (620) transmission information from a wireless subscriber unit, and modifying a power control level and/or a communication channel format (660) in response to said transmission information. Preferably, the transmission information is re-transmission requests from a wireless subscriber unit, which are transmitted frequently. In this manner, rapid adjustment of power control can be attained utilising an optimal selection of the available communication channel format, followed by a fine-tuning power control operation.

公开(公告)号：EP1477039A1

公开(公告)日：2004-11-17

申请号：EP02770096.2

申请日：2002-10-23

申请人： IPWireless, Inc.

发明人： SPEIGHT, Timothy James

IPC分类号： H04Q7/38 ,  H04Q7/22

CPC分类号： H04W28/18 ,  H04W28/22 ,  H04W72/00 ,  H04W72/0446 ,  H04W72/0466

摘要： A scheme for resource allocation for variable rate users in a packet-based radio communication system such as a UMTS TDD system is based on a representation (200) of the resource space organised orthogonally in 3 dimensions by codes, timeslots and frames. The representation (200) is searched to identify new resources that may be allocated and updated when new resources have been allocated. This scheme provides an efficient method for placing allocated resources into the system resource space while maintaining efficient packing, and provides the following advantages: allocations that result in different overall throughput rates can be made to users; efficient packing of allocated resources means that wasted resources is minimised; since the representation of the system resource space is bounded, the stored information at the resource allocator function (in the radio access network) can be minimized; allocations are only made based on the most current frame in the representation of the system resource space this reduces required complexity; and the maximum number of frames into the future over which resources can be allocated can be used to modify the shape of allocations.

公开(公告)号：EP1476953A1

公开(公告)日：2004-11-17

申请号：EP02801963.6

申请日：2002-10-23

申请人： IPWireless, Inc.

发明人： JONES, Alan Edward ,  TREWREN, David

IPC分类号： H04B1/707 ,  H04J11/00

CPC分类号： H04J13/0044 ,  H04B1/707 ,  H04B2201/70705 ,  H04J13/20

摘要： Processing of a received code division multiple access, CDMA, burst (405) when a spreading factor of the CDMA burst (405) has been changed from an allocated spreading factor (SFo) to a new spreading factor (SFn). The received burst (405) is processed with a CDMA detector (310), using the allocated spreading factor (SFo), to provide a CDMA detector output; the new spreading factor (SFn) of the burst is determined; and the CDMA detector output is decimated by a factor determined from the new spreading factor (SFn). The decimator may be a FIR decimator (315) and tap weights may be determined using the values of the new spreading factor (SFn) and the allocated spreading factor (SFo). Application in a Node B (150A) of a UMTS system (100), particularly in UTRA TDD mode, for processing received uplink communication is described.

摘要翻译： 当CDMA突发（405）的扩频因子已从所分配的扩频因子（SFo）改变为新的扩频因子（SFn）时，处理所接收的码分多址CDMA突发（405）。 利用所分配的扩频因子（SF 0），用CDMA检测器（310）处理接收到的突发（405），以提供CDMA检测器输出; 确定突发的新扩频因子（SFn）; 并且CDMA检测器输出被从新扩频因子（SFn）确定的因子抽取。 抽取器可以是FIR抽取器（315），并且可以使用新的扩展因子（SFn）和分配的扩频因子（SFo）的值来确定抽头权重。 描述了在UMTS系统（100）的节点B（150A）中的应用，特别是在UTRA TDD模式中，用于处理接收到的上行链路通信。

公开(公告)号：EP1470683A2

公开(公告)日：2004-10-27

申请号：EP02760438.8

申请日：2002-10-01

申请人： IPWireless, Inc.

发明人： GEERS, Steven Nicholas

IPC分类号： H04L25/03

CPC分类号： H04L25/03038 ,  H04L2025/03375 ,  H04L2025/03477 ,  H04L2025/03605

摘要： A method and arrangement for use in a single user detector in a CDMA multi-path system, comprising providing a finite impulse response (FIR) filter; and configuring the FIR filter to derive at least a first, then a second, of the following parameters for single user detection: R (auto-correlation) function; L (Cholesky decomposition) value; X value; Y value; and S value. In this way, five of the steps required to implement the single user detector can be implemented using an FIR filter, simplifying the method and arrangement required to implement the single user detector.