MESSAGE ENCODING IN VARIABLE RATE

    公开(公告)号:JP2002044014A

    公开(公告)日:2002-02-08

    申请号:JP2001169185

    申请日:2001-06-05

    Abstract: PROBLEM TO BE SOLVED: To identify a message group which can be used for transmitting by using previous messages. SOLUTION: As a message group contains the different number of messages, as a result, the messages from a smaller group can be expressed by using smaller bits than in the messages from a greater group. As the smallest group contains the messages accompanied by the highest possibility to be transmitted, the possibility of using the messages expressed by the smaller number of bits is maximized. The messages from the different groups are transmitted at different power level, and a receiver can determine the message group. As this result, the receiver identifies the messages by using previous messages, the power levels relating to the received messages, and the received message bits.

    ADAPTABLE FORWARD LINK SCHEDULING BY INTERCELLULAR MONITORING

    公开(公告)号:JP2002027538A

    公开(公告)日:2002-01-25

    申请号:JP2001165980

    申请日:2001-06-01

    Abstract: PROBLEM TO BE SOLVED: To dynamically save the electric power of a base station by monitoring the potential interference traffic of an adjacent base station and scheduling high-data-speed transmission according to it. SOLUTION: A method for saving the electric power source in a cellular telecommunication system and accordingly increasing the total throughput of the base station is disclosed. Signal intensity received from the adjacent base station is compared to the reference signal intensity. Electrical power is saved by performing scheduling at the time when the intensity of the signal received from a high-data-speed portable machine is lower than the reference signal intensity.

    METHOD FOR PROCESSING INFORMATION BLOCK
    5.
    发明专利

    公开(公告)号:JP2003124915A

    公开(公告)日:2003-04-25

    申请号:JP2002253367

    申请日:2002-08-30

    Abstract: PROBLEM TO BE SOLVED: To provide a method for retransmitting a plurality of error-coding streams that are formed by one information block when an error is detected. SOLUTION: In this method, a plurality of error-coding streams are formed by one information block in a first process. At least, two error-coding streams are transmitted according to a confirmation message after that. In a second process, independent error detection is executed to at least two received error- coding streams. At least, one confirmation message is transmitted to at least one of the received error-coding streams according to the result of independent, executed error detection.

    RADIO DATA COMMUNICATION SYSTEM
    7.
    发明专利

    公开(公告)号:JP2002118512A

    公开(公告)日:2002-04-19

    申请号:JP2001246026

    申请日:2001-08-14

    Abstract: PROBLEM TO BE SOLVED: To provide a system in which a reversely directed link beam and a forwardly directed link beam connecting a mobile station and a base station are controlled independently and which is adapted to a customer and his state. SOLUTION: A beam formation device which forms a narrow and high-gain beam, and a radio-resource controller connected to the beam formation device which decides and allocates a radio resource are installed. A detector which detects a data characteristic related to the mobile station is connected to a radio-resource allocation device. An array of antenna elements which transmit and receive the beam between themselves and the mobile station is installed. An SNR detector which detects the S/N ratio of a signal between the antenna elements and the mobile station is connected to the radio-resource controller.

    DYNAMIC REASSIGNMENT OF CODE SPACE AMONG MULTIPLE OPERATION MODE

    公开(公告)号:JP2002111629A

    公开(公告)日:2002-04-12

    申请号:JP2001276068

    申请日:2001-09-12

    Abstract: PROBLEM TO BE SOLVED: To provide a method for efficiently distributing a code space in multiple mode operation. SOLUTION: Two codes are led out from the Walsh space of a Walsh 32 by using a code from the Walsh space of a Walsh 16. Likewise, two codes are generated from the space of a Walsh 64 by using each Walsh code from the space of the Walsh 32. Wx,y represents No.y Walsh code from the Walsh space of a Walsh (x). W32.1 and W64.3 cross at right angles, but W32.1 and W64.2 do not cross at right angles. In a system using a 128 symbol Walsh code, it is desirable that codes are assigned to sub-spaces in the group unit of the eight continuous codes and only 16 decoding paths are required because a receiver receives transmission.

    METHOD AND APPARATUS FOR MULTI-USER RESOURCE MANAGEMENT IN RADIO COMMUNICATION SYSTEM

    公开(公告)号:JP2002016961A

    公开(公告)日:2002-01-18

    申请号:JP2001140919

    申请日:2001-05-11

    Abstract: PROBLEM TO BE SOLVED: To provide an efficient allocation of radio system resources for user application requirements in the management of system resource parameters in a radio communication system. SOLUTION: The apparatus for managing multi-user resources optimizes transmission resources while satisfying a required QoS reference of a user application providing a service, operates to determine allocation of radio transmission resources for each user application to which a radio system provides a service, determines total allocated transmission resources after transmission resources are allocated to all user applications, and compares the total allocated transmission resources with the upper limit transmission resource level of the radio system. In proportion to an initial allocation provided to each user application, a user application providing a service utilizes a part of difference between the upper limit transmission resource level and a currently allocated level.

    INFORMATION TRANSMITTING METHOD
    10.
    发明专利

    公开(公告)号:JP2000341249A

    公开(公告)日:2000-12-08

    申请号:JP2000117077

    申请日:2000-04-18

    Abstract: PROBLEM TO BE SOLVED: To make it possible to use a semi-Walsh function system which has high repulsion to wiretapping and jamming and enables multiple access and acquisition by transmitting a 1st information set of a user over a communication channel by using a 1st code and transmitting a 2nd information set of the user over the communication channel by using a 2nd code instead of the 1st code. SOLUTION: A diagonal matrix Dk is multiplied from back of a Walsh Hadmard matrix H to obtain the semi-Walsh function system Qk=HDk. An (i)th row is assigned to an (i)th user to enable multiple access over a data channel. Further, the diagonal matrix Dk is obtained each time information bit is sent by using a pseudo-random number generator, so the possibility that this row comes from semi-Walsh system Qk different for every transmit information bit is very high and it seems for an observer who does not know a formula for equal-length conversion that a semi-Walsh function column obtained as a result is random, so wiretapping is difficult.

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