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71.发明公开
公开(公告)号：EP1872616A1
公开(公告)日：2008-01-02
申请号：EP06751089.1
申请日：2006-04-20
发明人： JAIN, Nikhil , AGRAWAL, Avneesh
CPC分类号： H04W36/30 , H04L43/00 , H04L43/0829 , H04L43/0847 , H04L43/0852 , H04L43/087
摘要： The disclosure is directed to a mobile communication device, and method for handing off a mobile communications device between two networks. A processor in the mobile device may be used to establish a network connection with a server in a first network while supporting a call in a second network. The mobile device may also include a transceiver that receives information from the server relating to the network connection. The processor may use the information, local measurements, or both to determine whether to handoff the call to the first network.
摘要翻译： 本公开涉及一种用于在两个网络之间切换移动通信设备的移动通信设备和方法。 可以使用移动设备中的处理器来建立与第一网络中的服务器的网络连接，同时在第二网络中支持呼叫。 移动设备还可以包括从服务器接收关于网络连接的信息的收发器。 处理器可以使用信息，本地测量或两者来确定是否将呼叫切换到第一网络。
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72.发明公开DETERMINATION IF A SHARED CHANNEL (E.G. SSCH) CAN BE UTILIZED FOR TRANSMISSION 有权确定是否共享数据信道（例如SDCH）FOR传输中使用
公开(公告)号：EP1836812A2
公开(公告)日：2007-09-26
申请号：EP05855375.1
申请日：2005-12-21
CPC分类号： H04W28/065 , H04L1/0006 , H04L1/0026 , H04L1/1812 , H04W72/1205
摘要： An apparatus and method of delivering data in a wireless communication system, the apparatus and method comprising of determining, based on first criteria, if a shared channel can utilized to transmit an actual data packet; converting said actual data packet into one or more first data packets, wherein each said one or more first data packet represent a portion of said actual data packet; and transmitting each said one or more first data packet using said shared channel.
摘要翻译： 的设备和在无线通信系统中，该装置和方法包括确定开采，基于第一标准传送数据的方法中，如果一个共享信道可以用于发送实际数据包; 将所述实际数据包到一个或多个第一数据分组，每个worin所述一个或多个第一数据分组表示所述实际数据包的一部分; 传送和使用每个所述一个或多个第一数据包的共享信道。
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公开(公告)号：EP1774735A1
公开(公告)日：2007-04-18
申请号：EP05770028.8
申请日：2005-07-11
IPC分类号： H04L25/02
CPC分类号： H04L25/0204 , H04L25/0212 , H04L25/0226 , H04L27/261
摘要： Each transmitter is assigned a time-only pilot code, a frequency-only pilot code, or a time-frequency pilot code to use for pilot transmission. The pilot codes may be pseudo-random, orthogonal, and/or cyclic-shift codes. To obtain a channel estimate for a transmitter using a time-frequency pilot code composed of a time-only code and a frequency-only code, a receiver multiplies a set of received symbols for each symbol period with a set of code values for the frequency-only code to obtain a set of detected symbols and performs an IDFT on the set of detected symbols to obtain an initial impulse response estimate. The receiver performs code matching on multiple initial impulse response estimates derived for multiple symbol periods with the time-only code to obtain a final impulse response estimate for the desired transmitter. The receiver retains the first L channel taps and zeroes out remaining channel taps, where L is the expected channel length.
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74.发明公开MULTIPLE MODULATION SCHEMES IN SINGLE RATE LAYERING WIRELESS COMMUNICATION SYSTEMS 有权在无线单一税率层化通信系统中的多个调制方法
公开(公告)号：EP1774689A1
公开(公告)日：2007-04-18
申请号：EP05772187.0
申请日：2005-07-15
CPC分类号： H04L1/005 , H04L1/0003 , H04L1/0041 , H04L1/06
摘要： A MIMO communication system is adapted to encode multiple data streams at the same adaptable rate. Accordingly, the set of all possible modulation/rate combinations to all modulations with common rates is decreased thus resulting in the reduction of the number of possible packet formats carrying the data streams. Rate prediction is made more error-resilient, in part, due to the averaging over all information rates. Furthermore, the signaling overhead of the packets is reduced. Therefore, the tradeoff between the desired transmission rate granularity on the one hand, and robustness /signaling overhead on the other hand, is controlled by adjusting the coding rate.
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公开(公告)号：EP1774688A1
公开(公告)日：2007-04-18
申请号：EP05771458.6
申请日：2005-07-14
发明人： KHANDEKAR, Aamod , AGRAWAL, Avneesh
CPC分类号： H04L1/0015 , H04L1/0002 , H04L1/0006 , H04L1/0009 , H04L1/0026 , H04L1/1812 , H04L1/20 , H04L5/0007 , H04L5/0012 , H04L5/006 , H04L27/2601 , H04W16/02 , H04W16/12
摘要： Apparatus and methods for rate prediction in a wireless communication system having fractional frequency reuse are disclosed. A wireless communication system implementing Orthogonal Frequency Division Multiple Access (OFDMA) can implement a fractional frequency reuse plan where a portion of carriers is allocated for terminals not anticipating handoff and another portion of the carriers is reserved for terminals having a higher probability of handoff. Each of the portions can define a reuse set. The terminals can be constrained to frequency hop within a reuse set. The terminal can also be configured to determine a reuse set based on a present assignment of a subset of carriers. The terminal can determine a channel estimate and a channel quality indicator based in part on at least the present reuse set. The terminal can report the channel quality indicator to a source, which can determine a rate based on the index value.
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公开(公告)号：EP1757151A1
公开(公告)日：2007-02-28
申请号：EP05755475.0
申请日：2005-05-31
发明人： JI, Tingfang , AGRAWAL, Avneesh
IPC分类号： H04Q7/38
CPC分类号： H04W72/082 , H04L5/023 , H04W16/24 , H04W72/085
摘要： To avoid or reduce intra-cell interference, each sector of a cell is associated with a sector-specific set of system resources (e.g., subbands) and at least one non-overlapping common set of system resources. Each common set for each sector includes system resources observing little or no interference from at least one other sector in the cell. The channel condition for a terminal in a given sector x is ascertained based on forward and/or reverse link measurements for the terminal. The terminal is assigned system resources from a common set or a sector-specific set for sector x based on the terminal's channel condition. For example, if the terminal observes high interference from another sector Ϝ, then the terminal is assigned system resources from a common set that observes little or no interference from sector y. The techniques may be used for an OFDMA system that uses frequency hopping.
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公开(公告)号：EP1119922B1
公开(公告)日：2007-01-03
申请号：EP99954885.2
申请日：1999-10-12
发明人： BUTLER, Brian, K. , ZHANG, Haitao , TIEDEMANN, Edward, G., Jr. , ZOU, Qiuzhen , SIH, Gilbert, C. , AGRAWAL, Avneesh
CPC分类号： H04B1/70751 , H04B1/7077 , H04B1/70775 , H04B1/7115 , H04B2201/70701 , H04B2201/70702 , H04W52/0229 , Y02D70/40
摘要： A novel and improved method for performing paging is described. In one embodiment of the invention a searcher is used to detect spread spectrum signals. Samples received RF signals are stored in a sample buffer. During standby mode, the samples are gathered during paging slots assigned to the mobile. A set of searches are performed on the samples, and if pilot signals are detected additional demodulation is performed to detect paging messages. The resulting set of demodulation data may be combined to increase detection. After a page message has been detected, additional demodulation resources may be activated to processes more complete page messages, or other information channels. In one embodiment of the invention, the searcher includes a demodulator to perform quick page detection without the use of finger elements to reduce idle mode power consumption.
摘要翻译： 描述了用于执行寻呼的新颖且改进的方法。 在本发明的一个实施例中，搜索器用于检测扩频信号。 将接收到的射频信号样本存储在样本缓冲区中。 在待机模式下，样本在分配给移动台的寻呼时隙期间收集。 对样本执行一组搜索，并且如果检测到导频信号，则执行额外的解调以检测寻呼消息。 所得到的一组解调数据可以被组合以增加检测。 在检测到寻呼消息之后，可以激活附加的解调资源以处理更完整的寻呼消息或其他信息信道。 在本发明的一个实施例中，搜索器包括解调器，以执行快速页面检测而不使用手指元素来减少空闲模式功耗。
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78.发明公开MULTI-ANTENNA SYSTEM TO SIMULTANEOUS SUPPORT OF MISO AND MIMO RECEIVERS 有权以上的天线系统，用于MISO和MIMO接收机同时支持
公开(公告)号：EP1700437A1
公开(公告)日：2006-09-13
申请号：EP04812860.7
申请日：2004-12-03
CPC分类号： H04L25/0226 , H04B7/0452 , H04B7/0684 , H04L27/2613
摘要： Efficient pilot transmission schemes for multi-antenna communication systems are described. In general, MISO receivers prefer a pilot transmitted in one spatial direction, and MIMO receivers typically require a pilot transmitted in different spatial directions. In one pilot transmission scheme, a first set of T scaled pilot symbols is generated with a first training vector and transmitted (e.g., continuously) from T transmit antennas, where T > 1. If MIMO receiver(s) are to be supported by the system, then at least T-1 additional sets of T scaled pilot symbols are generated with at least T-1 additional training vectors and transmitted from the T transmit antennas. The training vectors are for different (e.g., orthogonal) spatial directions. Each MISO receiver can estimate its MISO channel based on the first set of scaled pilot symbols. Each MIMO receiver can estimate its MIMO channel based on the first and additional sets of scaled pilot symbols.
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79.发明公开FAST FREQUENCY HOPPING WITH A CODE DIVISION MULTIPLEXED PILOT IN AN OFDMA SYSTEM 有权FAST频率的OFDMA系统中码分导频跳频
公开(公告)号：EP1623505A2
公开(公告)日：2006-02-08
申请号：EP04751717.2
申请日：2004-05-07
IPC分类号： H04B1/00
CPC分类号： H04L27/2613 , H04B1/713 , H04B2201/70701 , H04L5/0007 , H04L5/0016 , H04L5/0041 , H04L5/0051 , H04L25/0232 , H04L25/03866 , H04L27/2647 , H04L2025/03414 , H04L2025/03509 , H04L2025/03789
摘要： Techniques are provided to support fast frequency hopping with a code division multiplexed (CDM) pilot in a multi-carrier communication system (e.g., an OFDMA system) [520]. Each transmitter (e.g., each terminal [420x]) in the system transmits a wideband pilot on all subbands to allow a receiver (e.g., a base station) to estimate the entire channel response at the same time. The wideband pilot for each transmitter [420x] may be generated using direct sequence spread spectrum processing and based on a pseudo-random number (PN) code assigned to that transmitter [420x]. This allows the receiver to individually identify and recover multiple wideband pilots transmitted concurrently by multiple transmitters. For a time division multiplexed (TDM)/CDM pilot transmission scheme, each transmitter transmits the wideband pilot in bursts. For a continuous CDM pilot transmission scheme, each transmitter [420x] continuously transmits the wideband pilot, albeit at a low transmit power level. Any frequency hopping rate may be supported without impacting pilot overhead.
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公开(公告)号：EP1428325A2
公开(公告)日：2004-06-16
申请号：EP02759739.2
申请日：2002-09-19
发明人： RAO, Subramanya, P. , VENKATESAN, Sivarama , GHO, Gwang-Hyun , AGRAWAL, Avneesh , TERASAWA, Daisuke
CPC分类号： H04B1/7077 , H04B1/70735 , H04B1/70752 , H04B1/7083 , H04B1/709 , H04B1/7093 , H04B2201/70701 , H04B2201/70707
摘要： Techniques for searching in asynchronous systems are disclosed. In one aspect, a plurality of codes, such as SSCs, are correlated with a received signal at a plurality of offsets to produce a code/slot energy corresponding to each code/slot boundary pair. Unique subsets of the code/slot energies are summed to produce code sequence energies, the maximum of which indicates a located code sequence and slot boundary. In another aspect, the correlation is performed by sub-correlating the received signal with a common sequence, and performing a Fast Hadamard Transform (FHT) on the results. In yet another aspect, one sub-correlator can be used to search a plurality of peaks simultaneously. Various other aspects of the invention are also presented. These aspects collectively have the benefit of circuit area and search-time efficiency which translate into reduced costs, increased standby time, increased acquisition speed, higher quality signal transmission, increased data throughput, decreased power, and improved overall system capacity.
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