公开(公告)号：EP2146544A2

公开(公告)日：2010-01-20

申请号：EP09173853.4

申请日：2007-07-31

申请人： Fujitsu Limited

发明人： Hart, Michael John Beems ,  Zhou, Yuefeng

IPC分类号： H04W72/04 ,  H04W88/04

CPC分类号： H04W28/06 ,  H04B7/155 ,  H04B7/2606 ,  H04W16/26 ,  H04W40/02 ,  H04W72/0453 ,  H04W88/04

摘要： A transmission method for use in a multi-hop wireless communication system, the system comprising a source apparatus, a destination apparatus and one or more intermediate apparatuses, said source apparatus being operable to transmit information along a series of links forming a communication path extending from the source apparatus to the destination apparatus via the or each intermediate apparatus, and the or each intermediate apparatus being operable to receive information from a previous apparatus along the path and to transmit the received information to a subsequent apparatus along the path, the system having access to a time-frequency format for use in assigning available transmission frequency bandwidth during a discrete transmission interval, said format defining a plurality of transmission windows within such an interval, each window occupying a different part of that interval and having a frequency bandwidth profile within said available transmission frequency bandwidth over its part of that interval, each said window being assignable for such a transmission interval to one of said apparatuses for use in transmission, the method comprising: employing said format for one or more such transmission intervals to transmit data and control information together along at least two consecutive said links as a set of successive transmission signals, link by link, each said signal being transmitted in an available transmission window of said interval(s) and at least two of said signals being transmitted during the same said transmission interval such that said information is transmitted along said consecutive links in fewer transmission intervals than said number of consecutive links.

公开(公告)号：EP2139173A2

公开(公告)日：2009-12-30

申请号：EP09173115.8

申请日：2007-07-31

申请人： FUJITSU LIMITED

发明人： Hart, Michael John Beems ,  Zhou, Yuefeng

IPC分类号： H04L12/56

CPC分类号： H04B7/2606 ,  H04B7/155 ,  H04W72/0406 ,  H04W84/047

摘要： A transmission method for use in a wireless communication system, the system comprising a subscriber station, base station and intermediate apparatus in the form of one or more relay stations, the subscriber station and the base station being arranged to transmit and receive information via the intermediate apparatus, at least the subscriber station being required to perform a network entry process in order to connect to the system. The method comprises, in the intermediate apparatus, determining whether the subscriber station has initiated a network entry process with the intermediate apparatus, for example by receiving a ranging code from the subscriber station. Upon such a determination, the intermediate apparatus notifies the base station of the fact whilst continuing to conduct the network entry process with the subscriber station. The base station responds with a return message to the intermediate apparatus, as part of a guidance process conducted from the base station to the intermediate apparatus so that the intermediate apparatus can manage completion of the network entry process. The method has particular relevance to multi-hop wireless systems based on standards such as IEEE 802.16 (WiMAX).

公开(公告)号：EP2136587A2

公开(公告)日：2009-12-23

申请号：EP09171903.9

申请日：2007-07-31

申请人： FUJITSU LIMITED

发明人： Hart, Michael John Beems ,  Zhou, Yuefeng ,  Viorel, Dorin ,  Zhu, Chenxi ,  Nakamura, Michiharu ,  Watanabe, Masahiro ,  Fujita, Hiroshi ,  Yoshida, Makoto

IPC分类号： H04W28/16

CPC分类号： H04W28/16 ,  H04B7/15507 ,  H04B7/2606 ,  H04L5/0007 ,  H04L5/0032 ,  H04L5/0048 ,  H04L25/0226 ,  H04L27/2655 ,  H04L27/2692 ,  H04W48/08 ,  H04W84/047

摘要： A transmission method for use in a multi-hop wireless communication system, the system comprising a source apparatus, a destination apparatus and one or more intermediate apparatuses, said source apparatus being operable to transmit information along a series of links forming a communication path extending from the source apparatus to the destination apparatus via the or each intermediate apparatus, and the or each intermediate apparatus being operable to receive information from a previous apparatus along the path and to transmit the received information to a subsequent apparatus along the path, the system having access to at least one predetermined transmission introduction sequence and also having access to a time-frequency format for use in assigning available transmission frequency bandwidth during a discrete transmission interval, said format defining a plurality of transmission windows within such an interval, each window occupying a different part of that interval and having a frequency bandwidth profile within said available transmission frequency bandwidth over its part of that interval, each said window being assignable for such a transmission interval to at least one of said apparatuses for use in transmission, the method comprising: when transmitting a message with a preamble in a particular transmission interval, transmitting the preamble in a first transmission window of that transmission interval; and transmitting the or one of the transmission introduction sequences in a second transmission window of that transmission interval other than the first transmission window preferably as control information for use by at least one said intermediate apparatus or the destination apparatus.

摘要翻译： 一种在多跳无线通信系统中使用的传输方法，所述系统包括源设备，目的地设备和一个或多个中间设备，所述源设备可操作以沿着形成通信路径的一系列链路传输信息，所述通信路径从 所述源设备经由所述或每个中间设备到所述目的地设备，并且所述或每个中间设备可操作以沿着所述路径接收来自先前设备的信息并且将接收到的信息发送到沿着所述路径的后续设备，所述系统具有接入 到至少一个预定的传输引入序列，并且还可以访问时间频率格式以用于在离散传输间隔期间分配可用传输频率带宽，所述格式在这样的间隔内定义了多个传输窗口，每个窗口占用不同的 部分的时间间隔，并有一个 在所述可用传输频率带宽内的所述可用传输频率带宽内的所述可用传输频率带宽内，每个所述窗口可针对这样的传输间隔分配给所述用于传输的至少一个所述设备，所述方法包括：当将前导码 特定传输间隔，在该传输间隔的第一传输窗口中传输前导码; 以及在除了第一发送窗之外的发送间隔的第二发送窗口中发送发送导入序列或一个发送导入序列，优选地作为由至少一个所述中间装置或目的地装置使用的控制信息。

公开(公告)号：EP2045953A3

公开(公告)日：2009-11-18

申请号：EP08164815.6

申请日：2008-09-22

申请人： Fujitsu Limited

发明人： Power, Kevin ,  Hart, Michael John Beems

IPC分类号： H04L5/00

CPC分类号： H04L5/0037 ,  H04L5/0007 ,  H04L5/0091 ,  H04W28/06 ,  H04W72/042

摘要： The invention concerns a signalling mechanism for an OFDMA wireless communication system, and concerns the number of bits used to indicate the 2-D resource allocation in each frame. The numbers of bits within the MAP-IEs in at least the DL_MAP and optionally also the UL_MAP of each frame, used to represent the Symbol offset and No. of Symbols, are scaled to the frame duration and to the subcarrier allocation scheme used for the zone to which the DL-MAP_IE is associated. Likewise, a variable number of bits is used for the subchannel offset and number of subchannels, which can be optimised based on the selected FFT size and subcarrier allocation scheme. The bit numbers in use can be TLV encoded and transmitted within a downlink channel descriptor following the DL_MAP and UL_MAP. Therefore, in subsequent frames each subscriber station knows the number of bits being used to represent these parameters, and thus the field sizes in the MAP_IEs, until such time as the DCD is updated. In this way, the signalling overhead incurred by the MAP_IEs, which can be very significant for a large number of users and with some frame and FFT sizes, is reduced.

公开(公告)号：EP2043403A2

公开(公告)日：2009-04-01

申请号：EP08154587.3

申请日：2008-04-16

申请人： Fujitsu Limited

发明人： Zhou, Yuefeng ,  Power, Kevin ,  Hart, Michael John Beems

IPC分类号： H04W72/04

CPC分类号： H04W72/042

摘要： A signalling method in a frame-based wireless communication system allowing a base station (BS) to inform fixed or mobile subscriber stations (MS) of resource allocations without excessive signalling and processing overhead. In one embodiment, in addition to normal resource allocation information such as a DL-MAP or UL-MAP, IDs of MSs or connections, for which the resource allocation has been modified, cancelled, or initialized, are listed at the start of the frame so that each MS can identify itself (or its connection) in the list. Only those mobile stations for which the list is relevant need to act on the resource allocation information. In another embodiment, the BS attaches a period of validity to each allocation of resources which is transmitted along with the normal resource allocation information. This frees the BS from having to repeat the same information in subsequent frames, and each MS can go on using the same resource during the period of validity without needing to check for updates.

摘要翻译： 一种基于帧的无线通信系统中的信令方法，允许基站（BS）向固定或移动用户台（MS）通知资源分配，而没有过多的信令和处理开销。 在一个实施例中，除了诸如DL-MAP或UL-MAP之类的正常资源分配信息之外，在帧的开始处列出了资源分配已被修改，取消或初始化的MS或连接的ID 以便每个MS可以在列表中标识自己（或其连接）。 只有与列表相关的那些移动台需要对资源分配信息进行操作。 在另一个实施例中，BS将有效期附加到与正常资源分配信息一起发送的每个资源分配。 这使得BS不必在后续帧中重复相同的信息，并且每个MS可以在有效期内继续使用相同的资源，而不需要检查更新。