Abstract:
PROBLEM TO BE SOLVED: To provide techniques for managing the load of an access channel in a wireless communication system.SOLUTION: The load of the access channel may be controlled by having each terminal regulate its use of the access channel on the basis of a rate control algorithm. The rate control algorithm may maintain information on past activities of a terminal and may regulate the use of the access channel by the terminal on the basis of its past activities in order to control the access channel load and achieve fairness. The system may determine at least one parameter value for the rate control algorithm on the basis of load conditions (312) and may broadcast the at least one parameter value to terminals (314). Each terminal may regulate its use of the access channel (318) on the basis of the at least one parameter value received from the system (316).
Abstract:
PROBLEM TO BE SOLVED: To provide efficient channel allocation in a network comprising an ad-hoc small-coverage base station.SOLUTION: In some aspect, restricted access nodes are assigned to a designated common channel, and access terminals that communicate in active with a macro access node may selectively be assigned to the designated channel. In some aspect, an access terminal associated with the macro access node may perform a handoff to a different carrier wave when the access terminal is in the vicinity of a coverage area of a restricted access node. In some aspect, an access terminal associated with a macro access node may perform a handoff to a different carrier wave on the basis of location information. In some aspect, access to a restricted access node is controlled on the basis of policy and/or on the basis of operation of an access terminal associated with the restricted access node.
Abstract:
PROBLEM TO BE SOLVED: To provide a method and an apparatus for low delay data communication on a multichannel which has different speed and waiting time and needs different time amount for setting up.SOLUTION: A transmitter removes a duplicated data packet from a queue after a second channel, for example, a dedicated channel, is established. In another embodiment, a sequence number is allocated to a data packet, and a receiver can distinguish the duplicated packet to ignore duplication.
Abstract:
PROBLEM TO BE SOLVED: To provide a method and apparatus for secure data transmission in a mobile communication system.SOLUTION: There are provided a method and apparatus for secure transmissions. Each user is provided a registration key. A long-time updated broadcast key is encrypted using the registration key and provided periodically to a user. A short-time updated key is encrypted using the broadcast key and provided periodically to a user. Broadcasts are then encrypted using the short-time key, in which the user decrypts the broadcast message using the short-time key. One embodiment provides link layer content encryption. Another embodiment provides end-to-end encryption.
Abstract:
PROBLEM TO BE SOLVED: To provide a hybrid protocol for supporting communications with multiple networks. SOLUTION: Systems and techniques are disclosed relating to wireless communications. The systems and techniques involve monitoring a first network in accordance with a first air interface, and receiving a message from a second network through the first air interface, the second network being associated with a second air interface different from the first air interface. Various registration and related techniques are also discussed for maintaining connectivity with both networks as the wireless communications device moves through different geographic coverage regions. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an efficient method for detecting delayed data frames in a transport function. SOLUTION: A method for detecting delayed data frames in a transport function includes the steps of comparing a frame sequence counter with a predetermined threshold value (304), detecting a delayed frame if the sequence counter exceeds the threshold value, and processing the detected delayed frame accordingly (306). In an RLP data transport protocol, the delayed frame may be processed as a retransmitted frame. The threshold value may be proportional to the maximum number of frames sent in a given bundle, times the maximum delay, in units of frame intervals, between frames sent simultaneously over the air in the same frame interval. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a novel and improved method and apparatus for generating a reduced peak amplitude high data rate channel comprising a set of lower rate channels. SOLUTION: There is provided an apparatus and a method for carrying out data transfer at a high data rate in a plurality of low data rate channel. The set of lower rate channels are phase, rotated before being summed and transmitted. The amount of phase rotation is dependent on the number of channels used to form the higher rate channel. In one embodiment where two lower rate channels are used, the in-phase and quadrature-phase components of the two channels are complex multiplied before upconversion with an in-phase and quadrature-phase sinusoids. For a high rate channel comprising more than two lower rate channels, the in-phase and quadrature-phase component of each channel is upconverted with a set of sinusoids that are phase offset from one another. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To obtain an efficient data throughput by avoiding unnecessary data sub-packets transmission without impairing new data packets. SOLUTION: In the method and system, a sub-packet for a current data packet and a sub-packet for a new data packet are discriminatedby assigning different codes to the current data packet and the new data packet. When a currently received sub-packet and a previously received sub-packet for a previously decoded data packet have equivalent codes, the remote station sends (step 506) an acknowledgement signal to the base station, preventing unnecessary sub-packets transmission. When the currently received sub-packet and the previously received sub-packet have different codes, the remote station sends (step 510) an acknowledgement signal, if the remote station can decode the new packet from the current sub-packet. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide efficient channel allocation in a network comprising an ad-hoc small-coverage base station.SOLUTION: In some aspect, restricted access nodes are assigned to a designated common channel, and access terminals that communicate in active with a macro access node may selectively be assigned to the designated channel. In some aspect, an access terminal associated with the macro access node may perform a handoff to a different carrier wave when the access terminal is in the vicinity of a coverage area of a restricted access node. In some aspect, an access terminal associated with a macro access node may perform a handoff to a different carrier wave on the basis of location information. In some aspect, access to a restricted access node is controlled on the basis of policy and/or on the basis of operation of an access terminal associated with the restricted access node.
Abstract:
PROBLEM TO BE SOLVED: To provide a hybrid protocol supporting communications with multiple networks.SOLUTION: Systems and techniques are disclosed relating to wireless communications. The systems and techniques involve monitoring a first network in accordance with a first air interface, and receiving a message through the first air interface from a second network which is associated with a second air interface different from the first air interface. Various registration and related techniques are also discussed for maintaining connectivity with both networks as a wireless communication device moves through different geographic coverage regions.