公开(公告)号：DE60227269D1

公开(公告)日：2008-08-07

申请号：DE60227269

申请日：2002-08-23

Applicant: ERICSSON TELEFON AB L M

Inventor： LINDSKOG JAN ,  ALMEHAG LORENS ,  WOXBERG FREDRIK

IPC: H04L12/28 ,  H04W28/26 ,  H04W72/04 ,  H04W74/00 ,  H04W84/12

Abstract: A central controller (CC) [22] of a wireless Local area network (LAN) [20], in conjunction with an association operation with a mobile terminal [24] and upon receiving from the mobile terminal (MT) a first control signal [CS1] of a sequence of control signals involved in the association operation, pre-reserves a MAC resource for transmission of at least a further control signal in the sequence. The MAC resource for the further control signal is pre-reserved prior to information for the further control signal being stored in a transmission buffer [58] of the mobile terminal. In essence, judging from the nature of the first control signal, the central controller (CC) anticipates eventuality of the further control signal and pre-reserves the MAC resource for the further control signal. The central controller (CC) pre-reserves the MAC resource to avoid transmission of a separate message to request a MAC resource for the further control signal. The association operation for which the pre-reservation occurs can be, for example, an initial association scenario or a handover scenario in which the mobile terminal (MT) is handed over to the central controller (CC).

公开(公告)号：DE60222282T2

公开(公告)日：2008-06-12

申请号：DE60222282

申请日：2002-09-11

Applicant: ERICSSON TELEFON AB L M

Inventor： LINDSKOG JAN ,  RYDNELL GUNNAR ,  LARSSON PETER

IPC: H04L12/56 ,  H04B7/26 ,  H04L12/26 ,  H04L12/28 ,  H04W28/18 ,  H04W28/24 ,  H04W40/02 ,  H04W40/24 ,  H04W74/08 ,  H04W76/02 ,  H04W80/00 ,  H04W84/12

Abstract: A method for multihop packet trasmissions in a wireless network involves establishing a multihop route through the wireless network. After establishment of the multihop route, transmission protocol parameter are altered to minimize delays for transmissions over the multihop route and at least one packet is transmitted over the multihop route according to the altered transmission protocol parameters. In a first embodiment, the altering of the transmission protocol parameters includes setting a NAV value at each node of the multihop route for a duration of the packet transmissions over the route. In an alternative embodiment, multihop packets are assigned a higher QoS value.

公开(公告)号：DE60226259D1

公开(公告)日：2008-06-05

申请号：DE60226259

申请日：2002-09-13

Applicant: ERICSSON TELEFON AB L M

Inventor： KHUN-JUSH JAMSHID ,  SCHRAMM PETER ,  LINDSKOG JAN ,  ROMMER STEFAN ,  PAULI MATHIAS ,  ZIMMERMANN GERD ,  JOHANSSON FREDRIK ,  RANHEIM ANDERS ,  LARSSON PETER

IPC: H04L12/28 ,  H04L12/56 ,  H04W16/14 ,  H04W24/00 ,  H04W52/00 ,  H04W84/12 ,  H04W84/18

Abstract: The invention discloses a method for use in a wireless communications system with a plurality of broadcasting nodes, comprising the step of enabling one node in the system to function as a central node in said system and letting said node enable measurements on at least one frequency in a frequency band used by the system. Said measurements are carried out to detect if said at least one frequency is being utilized by a transmitter foreign to the system. Preferably, the measurement is enabled by means of the node transmitting a message to other nodes in the system, said message being a message pre-defined within the system as a message prohibiting all nodes from transmitting during a certain interval, said message being transmitted after the system has been detected by the node to be silent during a predefined interval between frame transmissions from the nodes in the system.

公开(公告)号：DE60028950D1

公开(公告)日：2006-08-03

申请号：DE60028950

申请日：2000-04-07

Applicant: ERICSSON TELEFON AB L M

Inventor： LINDSKOG JAN ,  OLSSON JONAS ,  MALMGREN GORAN ,  MIKLOS GYORGY

IPC: H04L1/18 ,  H04L12/28 ,  H04L1/00

公开(公告)号：BR0215922A

公开(公告)日：2005-08-09

申请号：BR0215922

申请日：2002-11-07

Applicant: ERICSSON TELEFON AB L M

Inventor： LINDSKOG JAN ,  RYDNELL GUNNAR ,  WALTHER ROGER ,  KRONQUIST GOERAN ,  SJOEBERG STEN

IPC: H04L27/26

Abstract: Method of communicating frames of digital data by OFDM modulated signals comprising a first plurality of payload carrying sub-channels and a second plurality of pilot carrying sub-channels, whereby consecutive frames of payload data is are associated with a given pilot configuration and transmitted. Prior to the transmission of a frame of payload data, each of the plurality of pilot configurations are evaluated with regard to PAPR, whereby the pilot configuration being associated with the lowest PAPR value is being chosen for transmission.

公开(公告)号：BR0214782A

公开(公告)日：2004-11-09

申请号：BR0214782

申请日：2002-11-27

Applicant: ERICSSON TELEFON AB L M

Inventor： LINDSKOG JAN ,  ROMMER STEFAN ,  RYDNELL GUNNAR

IPC: G06F1/32 ,  H04L12/28 ,  H04W52/02 ,  H04W72/12 ,  H04W76/04 ,  H04Q7/38

Abstract: A wireless station, in a wireless LAN, includes a network interface to a network interface device, e.g., a NIC, that includes a transceiver, an antenna, at least a first power supply or energy holder. The wireless station supports transmission of data in frames of variable length. Frame fragmentation is implemented by dividing a (long) frame into a number of frame fragments. Each fragment is sent as a non-fragmented frame. The length of a time period before or between transmission of (consecutive) frame fragments is controlled in order to decrease energy consumption during a predetermined time interval.

公开(公告)号：GB2364869B

公开(公告)日：2004-05-19

申请号：GB0126543

申请日：2000-04-07

Applicant: ERICSSON TELEFON AB L M

Inventor： LINDSKOG JAN ,  MALMGREN GOERAN ,  LI HUI ,  RYDNELL GUNNAR ,  NILSSON FREDERIK ,  MIKLOS GYOERGY

IPC: H04L1/16 ,  H04L1/18 ,  H04L12/28 ,  H04L29/08

Abstract: In a wireline or wireless telecommunications system or data network, which employs a Selective Repeat Automatic Repeat Request (ARQ) to convey data packet reception status for a sequence of data packets grouped together into a number of blocks of data packets, partial bit mapping is employed to improve efficiency, particularly with respect to bandwidth. This may be accomplished, more specifically, by including in the ARQ message that is sent from the receiver to the sender, a number of partial bitmaps, along with a corresponding number of bitmap block numbers, where a first bitmap block number identifies a particular one of the blocks of data packets and the corresponding bitmap defines the reception status of the data packets in that block. Each of the remaining bitmap block numbers identify an additional block of data packets relative to the first block of data packets. Accordingly, the remaining bitmap block numbers require fewer bits to identify their corresponding data packet blocks.

公开(公告)号：AU2003214741A1

公开(公告)日：2003-09-22

申请号：AU2003214741

申请日：2003-03-10

Applicant: ERICSSON TELEFON AB L M

Inventor： ROMMER STEFAN ,  JOHANSSON PER-ERIK ,  RYDNELL GUNNAR ,  LINDSKOG JAN

IPC: H04L9/00 ,  H04L12/28 ,  H04L12/56 ,  H04L29/06 ,  H04L12/22

Abstract: A method of performing selective filtering, a network comprising a station, an AP and a PAC, whereby synchronisation between the AP and the PAC is performed in order to allow filtering of messages in at least the AP or in the PAC has been provided. An AP is moreover provided being able to perform both legacy and 802.11i association and authentication, whereby if a 802.11i station is encountered, filtering is performed until a 802.11i association and authentication is successful, and if a legacy station is encountered allowing the station to initiate login procedure with a PAC, if the station is not authenticated by the PAC, filtering messages to the station in question.

公开(公告)号：AU3574102A

公开(公告)日：2002-06-18

申请号：AU3574102

申请日：2001-11-27

Applicant: ERICSSON TELEFON AB L M

Inventor： ZIMMERMANN GERD ,  LI HUI ,  WENGER FABIAN ,  LINDSKOG JAN ,  PAULI MATHIAS

IPC: H04L1/00 ,  H04L1/08

Abstract: In a packet transmission system, especially wireless transmission system, where data is transmitted in packets at different error protection levels and where the error protection level of one packet (= the succeeding packet) may differ from the error protection level of a preceding packet without providing code termination between the said preceding and the said succeeding packet the performance may degrade in case a different error protection level is used by the preceding packet and the succeeding packet. The invention proposes in these cases to insert a supplementary packet between the preceding and the succeeding packet whereby the error protection level of the supplementary packet is higher than the lowest error protection level that is used either by the preceding or the succeeding packet.

公开(公告)号：AU2239501A

公开(公告)日：2001-06-18

申请号：AU2239501

申请日：2000-11-28

Applicant: ERICSSON TELEFON AB L M

Inventor： POHJANVOURI TIMO ,  LINDSKOG JAN ,  WENAKER PAR ,  KARNBO TORBJORN ,  SVENSSON HAKAN ,  RYDNELL GUNNAR

IPC: H04L12/56 ,  H04L29/12 ,  H04W8/26 ,  H04W74/02 ,  H04Q7/22

Abstract: Random access opportunities are provided to packet data devices needing urgent transmit resources. Additionally, random access opportunities are controlled by prioritizing both the random access opportunities and one or more of the packet data device that needs to transmit or the application data that needs to be transmitted.