Abstract: A mobile telephone includes a control device, which comprises a receiver to receive an enabling signal and a controller to enable operation of the mobile telephone in dependence upon the enabling signal. An active badge transmits the enabling signal. If the telephone and the badge are separated and the mobile telephone is no longer able to receive the enabling signal, then the controller disables the mobile telephone.

Abstract: A portable radio telephone (5) communicates with base stations (1, 2) in a digital radio telephone system, such as DECT, employing TDMA transmission. The portable radio telephone is programmed with an algorithm which is operative to select a communication channel by storing a blind slot mask (7) representative of the time slots in each frame which are excluded, either by virtue of being occupied by the base station or by the portable radio telephone itself. Hence, any channel attempted and failed in an occupied time slot is excluded and marked blind in the blind slot mask. Further, the algorithm is operative to check the time slots for availability in a predetermined sequence which corresponds to the temporal sequence of the slots (or the reverse thereof) to promote orderly filling of the time slots at the base stations.

Abstract: A telephone for setting up a conference call, the telephone comprising a memory for storing data relating to a first and second user; control means for retrieving said data from the memory and originating a call to the first user the control means being responsive to a signal indicating that the first call has been established originates a call to the second user.

Abstract: A method is taught for assigning spreading codes to mobile stations located within a cell, as is a CDMA communications system that operates in accordance with the method. The method includes steps of (A) assigning a set of spreading codes for use in a particular cell; (B) determining values of entries in a spreading code performance table (fixed or dynamic) based on a weighted combination of cross-correlation factors between individual ones of the spreading codes of the set of spreading codes, and also based on an auto-correlation factor of individual ones of the spreading codes of the set of spreading codes, within a delay spread range that is typical for the particular cell; and (C) assigning a spreading code from the performance table by selecting a spreading code that will cause a least amount of interference with a sub-set of already assigned spreading codes.

Abstract: An electronic device comprising a housing 4, a display for entering and displaying data, the display being disposed in the housing and having a touch sensitive surface 6, and a cover 8 and 28. The cover is coupled to the housing 4 in a movable manner and movable between an open position and a closed position. When the cover is in the closed position, at least a portion of the touch sensitive surface 6 is covered by the cover. The device includes a sensor for sensing whether the cover is in the closed position. The sensor comprises a member 12 and 22 on the cover and a corresponding activation area 66 and 68 of the touch sensitive surface. The member and the corresponding activation area of the touch sensitive surface are in contact when the cover is in the closed position.

Abstract: A two transistor mixer for mixing radio frequency signals in a communications device. A mixer core section comprised of a pair of matched semiconductor devices having their drain ports connected to a first common node through matched load resistors and their source ports connected to a second common node end. A local oscillator (LO) signal input connected to the first and second nodes, wherein the connection to the second node is through a current source. A radio frequency (RF) signal input connected to the gate ports of said pair of semiconductor devices and an intermediate frequency (IF) output obtained from the drain ports of said pair of semiconductor devices.

Abstract: A portable phone is described having a display, input device for inputting information and instructions, and a control unit controlling the display in dependence on the operation of the input device. The input device includes a navigation device for moving a marker in an active part of the display. The navigation device is provided with a roller body and includes the ability for detecting the rolling and depression of the roller body and for providing control signals in response thereto. In an information input mode, the control unit moves the marker in the display in dependence on the rolling control signal and generates a pop-up window upon reception of the depression control signal, the pop-up window covering a part of the active display and containing operations which are allowed in a position defined by the marker.

Abstract: A portable electronic apparatus which includes first and second portions arranged to be movable relative to each other. Electrical connection between the portions is effected through use of a flexible electrical connector. The route of the connector between the two portions is impeded by an obstacle so that in a first configuration, the connector is constrained to follow a first route, and in a second configuration, the connector is constrained to follow a second, different, route.

Abstract: A memory controller for controlling the transfer of data to and from a memory array, wherein the memory array includes a first type of memory and a second type of memory, the first type having a different signalling protocol from the second type of memory, wherein the memory controller comprises: an address decoder having an input for receiving a memory access request, said memory access request including the address of the memory array to be accessed, and an output for outputting the address of the memory array to be accessed; a first sub-controller for generating a plurality of memory interface signals for controlling the first type of memory, said first sub-controller being operated in response to addresses within a first range of addresses output by the address decoder; and a second sub-controller for generating a plurality of memory interface signals for controlling the second type of memory, said second sub-controller being operated in response to addresses within a second, non-overlapping range of a

Abstract: A back cover for a mobile phone is described. The cover comprises an elongate body having an outer surface exposed on attachment to the phone and inner surfaces comprising first and second guiding surfaces; and lockable restraining means arranged to co-operate with corresponding restraining means of the phone on the movement of the cover with respect to the phone along said guiding surfaces, thereby preventing substantial movement of the body with respect to the phone in said lengthwise direction. The lockable restraining means of the cover or the corresponding restraining means of the phone comprises a resilient, outwardly flexible part. This part resiliently flexes on said movement of the cover with respect to the phone along said guiding surfaces and forms a user releasable locking engagement between the cover and the phone. The locking engagement is released by the user pulling outwards on the member.

Abstract: The invention pertains to a method and an arrangement for linearizing a radio receiver (20). The invention is advantageously applied in the reception circuits of mobile stations. A receiver according to the invention monitors the signal strength on the receive channel and its neighboring channels. In addition, the receiver can determine the quality of the detected signal by calculating its bit error ratio or signal-to-noise ratio. In normal conditions, i.e. when the signal strength is satisfactory on the receive channel and normal on the neighboring channels, the supply currents of the front-end amplifiers (A1, A2) and at least the first mixer (M1) of the receiver are kept relatively small. If the signal strength on the receive channel goes below a predetermined value or, on a neighboring channel, exceeds a predetermined value, said supply currents are increased. This may happen also if the bit error ratio or signal-to-noise ratio reaches a predetermined limit.

Abstract: A method is presented for changing data rates in a communication connection between a transmitting device and a receiving device, in which communication connection—the information to be transmitted is in the form of bits grouped to code words and—bits are diagonally interleaved from code words into symbols, a predetermined number of consecutive symbols consituting a burst. The method comprises constructing the symbol according to a predetermined set of rules, wherein said predetermined set of rules are chosen according to the length of the code words.

Abstract: A transmitter has an input for receiving a signal, gain controller for applying a first gain to the received signal, a first path for providing a second, relatively high gain for the received signal, a second path for providing a third, relatively low gain for said received signal, a transmitter for transmitting a signal and a controller to cause a received signal to pass through the gain controller and the first path when a relatively high gain is to be applied to the received signal and to cause a received signal to pass through the gain controller and the second path when a relatively low gain is to be applied to the received signal. When a change is made from using one of the first and second paths to using the other, the power of the signal transmitted by the transmitter varies by less than or equal to a predetermined amount.

Abstract: An antenna coupler (400, 500, 802) is provided for coupling a radio telecommunication device (301) with an integral planar antenna to an external device (801). The integral planar antenna of the radio telecommunication device comprises a first planar conductive antenna element (306). The antenna coupler comprises a second planar conductive antenna element (401, 501) which is essentially similar to the first planar conductive antenna element, a first conductive ground plane (403) parallel to the second planar conductive antenna element and transmission apparatus (404) for conducting a radio frequency signal between the second planar conductive antenna element and the external device.

Abstract: A messaging system is provided for communicating a message between a first communications unit having a first messaging entity and a second communications unit having a second messaging entity, each messaging entity having a messaging call control means for establishing a messaging communications link with the other messaging entity; and a messaging means for, once the messaging communications link has been established, exchanging messaging information with the said other messaging entity. Also a method is provided for communicating a message between a first communications unit and a second communications unit, the first communications unit having an application layer, a messaging entity and a network layer.

Abstract: A communication unit including a light guide for illuminating a display including a substantially transparent plate-formed element with reception means for receiving light from light sources and for guiding the light into the transparent plate-formed element of the light guide. The reception means includes light in-coupling surfaces each facing towards a light source and being substantially parallel with a main surface of the light guide. The reception means includes a lens and a diffuser, for dispersing the light substantially parallel with the main surface of the light guide to illuminate the display. The light guide also has means for illuminating a keyboard. The means to illuminate the keyboard includes keyholes through the light guide, the keyholes having chamfered surfaces for reflecting the light in the light guide perpendicular to the surface of the light guide onto the keyboard.

Abstract: The invention relates to a method for allocating resources for a data transmission connection between a wireless communication device and a mobile communication network. In the method, the information to be transmitted is divided into at least a first and a second quality of service class. For the data transmission connection, either a fixed resource or a dynamic resource is allocated on the basis of the quality of service class in which the information to be transmitted in the data transmission connection is classified.

Abstract: The invention relates to a method in data transmission between a first mobile station (MS, MS1, MS2), a second mobile station (MS, MS1, MS2), and advantageously also a server (3, SERVER), wherein the first mobile station (MS, MS1, MS2) and the second mobile station (MS, MS1, MS2) comprise protocol means (100-106) for generating and directing a request (REQUEST) which contains at least address information (URI, URL, URN) for identifying the destination of the request (REQUEST), and wherein at least the first mobile station (MS, MS1, MS2) comprises a first local resource (SC, 4), such as a smart card, connected to the same. In the information, the address information (URI, URL, URN) of the request (REQUEST) is established to identify said first local resource (SC, 4), and the request (REQUEST) is generated and directed at least partly with the help of said protocol means (100-106).

Abstract: The transmission of a service page according to the present invention provides for versatile data to be displayed on a display of a terminal, which is in contact with a telecommunication network, on the basis of CLIP or CoLP identifier information. This is implemented, for example, so that after having received (31) the CLIP identifier information, characteristic of a subscriber A, a subscriber B contacts a server (32), through a telecommunication network, and transmits (33) to it the CLIP information on the subscriber A. On the basis of this, the server transmits to the subscriber B the address of a service page (37), characteristic of the subscriber A, provided that it is located in a database (34, 35). After this, the subscriber B retrieves (38), from an Internet address (37) it has received, the service page, characteristic of the subscriber A, and displays it on its display (39).

Abstract: In order to perform data transmission between a mobile station and a cellular radio network, the cellular radio network comprises a radio access network (104, 105, 106) for processing messages according to a first protocol, and a core network (101, 102, 103) for processing messages according to a second protocol. The mobile station deals with messages according to the first protocol on given lower protocol layers and messages according to the second protocol on a given higher protocol layer. On an adaptation layer (301) located between the higher protocol layer and the lower protocol layers, there is performed an adaptation where the messages according to the first and second protocol are mapped into each other.