Lucent Technologies Inc.

Qiang Cao

Seau Sian Lim

Patrick Georges Venceslas Charriere

David Lahiri Bhatoolaul

Jens Mueckenheim

Philip Charles Sapiano

Lorenz Fred Freiberg

Patrick Georges Charriere

David Jonathan Reader

Jie Lin

Fang-Chen Cheng

Pantelis Monogioudis

Said Tatesh

Stephen Alan Allpress

Steven Andrew Wood

Stefan Gruhl

Gordon Peter Young

Michael Soellner

Charlotte Catherine Elizabeth Baden

Charlotte Catherine Baden

A method is provided of transmission of a data frame from a first station to a second station, in a code division multiple access (CDMA) telecommunications network. The network operates according to a hierarchical series of protocol processes including a physical layer process under the control of a radio link control (RLC) process. An indication of when a data frame is passed to the physical layer process for transmission to the second station is sent to the RLC process in the first station. Upon receipt of the indication the RLC process, a timer is started to time a predetermined period before again passing the data frame to the physical layer process for retransmission to the second station unless an acknowledgement of receipt from the second station is received.

Method of transmission of a data frame from a first station to a second station, and a CDMA telecommunications network

In the method provided, test transmissions between the mobile user terminal and base station antennas are made, and the received test transmissions processed to determine respective signal path quality for each of the base station antennas. Upon the determined signal path quality exceeding a first predetermined threshold, but being less than a second predetermined threshold higher than the first predetermined threshold, the mobile user terminal is connected to the corresponding base station antenna by control channels but not data channels so as to be time synchronised. Upon the determined signal path quality exceeding the second predetermined threshold, the mobile user terminal is connected to the corresponding base station antenna by both control channels and data channels so as to be call connected.

Radio telecommunications network, and a method of selecting base station antennas for connection with a mobile user terminal

A telecommunications network comprises a base station and a mobile station in use in call connection on at least one uplink channel for communicating user data. The base station is operative such that on receipt of a command to transfer to and/or add at least one other uplink channel for communicating user data, the at least one other uplink channel is allocated to the call connection after a predetermined period during which power level adjustment is undertaken to compensate for mobile station movement.

Telecommunications network comprising a base station and a mobile station, and a method of transferring to and/or adding into a call connection at least one other uplink channel for user data

Battery operated user equipment is disclosed for use in a radio telecommunications network, including means for monitoring the state of charge of the battery and means for communicating state of charge data to a base station during call set up. The battery data can be used to inform a caller that, for example, a called user's apparatus has reduced or limited battery capacity and thus that the expected duration of a call is limited.

Radio telecommunications network, user equipment and method of operation

The invention relates to packet transmission scheduling and specifically to UMTS packet transmission scheduling. It is an object of the invention to provide an improved method for packet transmission scheduling, especially on downlink shared channels and an improved packet transmission scheduling system, both the improved method and the system especially adapted to be used for UMTS systems. The invention proposes a quality of service scheduling of multiple data flows in a CDMA system, wherein

Method and system for UMTS packet transmission scheduling on shared downlink channels

The transmission power is adjusted of a Forward Access Channel (FACH) from a base station to a mobile user terminal in a network for mobile telecommunications. The method comprises steps as follows. The base station sends a signal at a first transmission power level to the mobile user terminal. The mobile user terminal then sends a report of one or more parameter values dependent upon measured signal quality provided a predetermined reporting criterion is met. The base station then adjusts its transmission power to the mobile user terminal in consequence so as to maintain the measured signal quality within acceptable limits.

Adjusting the transmission power of a forward access channel (FACH), and a corresponding network for mobile telecommunications

A radio telecommunications network comprises a transmitter () and a receiver (). The transmitter () is operative to send signals indicative of data, and the receiver () is operative to receive the signals () and decode the signals to determine the data. The receiver () comprises indicator means to send to the transmitter () an indication of whether data has been correctly determined, and the transmitter () is operative to retransmit at least some data not correctly determined. The receiver () further comprises a buffer () operative to store the determined data. The buffer () is operative to output the determined data at a predetermined rate.

Radio telecommunications network, a method of transmitting data in a radio telecommunications network, a receiver, and a method of receiving

In a UMTS, the AICH is arranged to send, in addition to a signal acknowledging that a preamble from a mobile is at an acceptable strength, an additional signal indicating that the mobile is not currently permitted to send its message; this may apply when the BTS does not have hardware resources available. If the BTS can predict when the hardware will become available, the additional signal can include a time out (T) after which the mobile system can send its message signal.

Message access for radio telecommunications system

There is disclosed a method of allocating a channelisation code comprising, for each user, defining a path in the code tree based on a required range of spreading factors, selecting a node of the path in dependence on the currently required spreading factor; and reserving all nodes on the code tree in an upward and downward direction from the selected node, wherein the selected node for any user must not coincide with a node reserved by any other user.

Code branch allocation for CDMA systems

A method is provided of informing mobile user terminals () camped on a cell of a base station () of a radio telecommunications network that a service is unavailable, such that a mobile user terminal () desirous of said service is handed over to another cell which provides said service. The method comprises informing the terminals () that selectably at least one of circuit-switched services () and packet-switched services () are unavailable.

Method of informing mobile user terminals camped on a cell of a base station that a service is unavailable, a base station, and a network

A mobile for use in the UMTS is arranged, on activation to read the Broadcast Control Channel (BCCH) for all available preamble signatures; to store the signatures in its processor; to read the Acquisition Indication Channel (AICH) for acquisition indicators sent to other mobiles; to store usage of other mobiles against each signature; and to select when required a signature the recorded usage of which is unlikely to cause collisions.

In the UMTS, semi-static uplink and downlink connection parameters relating to the frequently-used services of voice, fax and web browsing are intermittently broadcast to mobile user equipment () which stores the parameters. When a mobile requests () one of those services, the relevant dynamic parameters are sent () over the radio interface and the mobile is asked whether it has in its store the relevant parameters for the requested service; if so (), the call is set up; if not (), the semi-static parameters relevant to the requested service are sent () to the user equipment. Considerable saving of radio resource results.

Method and apparatus for reducing signalling load in mobile telecommunications networks

In a data packet, e.g. a PDU of the UMTS, a length indicator field of variable granularity is created, depending on the exact length of the payload to be transmitted. An additional field is provided, a single bit in length, to indicate the granularity of the length indicator field. This increases the resolution of the header, whilst keeping low an overhead of extra field bits. The method comprises: assessing the length of the data to determine the appropriate units, from a plurality of possible units, in which the length should be expressed; setting the granularity field to define the appropriate units in which the length of the data is to be indicated; and setting the length indicator field to indicate the data length.

Data packet length indication for mobile telecommunications systems

In a UMTS system, the AICH is arranged to send, in addition to signals acknowledging that a preamble () from a mobile () is at an acceptable strength, further signals () acknowledging message signals () from the mobile. Preferably the further signal () is a negative acknowledgement signal, indicating that a message () is corrupted. Application of the invention avoids the involvement of layer () in message acknowledgement.

In the Universal Mobile Telecommunications System, a method of transport format combination selection is provided for directing data units for transmission from a buffer in the RLC layer to transport channels in the MAC layer. The method includes providing a set of information channels in the RLC layer for connection to the buffer and a set of transport channels in the MAC layer for transmission of the data units, selecting a subset of the information channels and a subset of the transport channels for interconnection, and selecting for each transport channel one or more information channels to be multiplexed on the transport channel. A mapping table and a transport block combination table are created as a result of prioritizing the selected transport channels according to a predetermined scheme in dependence on the characteristics of the information channels and then there from, determining the number of data units which may be transmitted in a timing interval.

Growing community of inventors

Swindon, United Kingdom

Qiang Cao