Abstract: A communications network is being accessed by a wireless device associated with a coverage class selected from a set of coverage classes. The wireless device performs a method comprising initiating network access to the communications network by transmitting a preamble sequence for random access on a physical random access channel during a starting opportunity defined by the coverage class of the wireless device. Each coverage class may be associated with a unique number of repetitions of the preamble sequence transmission.

Abstract: A method for enhancing Random Access Channel (RACH) performance is provided. First timing settings to be used by a first set of user equipments for a first Acquisition Indicator Channel (AICH) response timing are explicitly or implicitly signaled from a NodeB or from a Radio Network Controller (RNC) to a user equipment. Further, second timing settings to be used by a second set of user equipments for a second AICH response timing are explicitly or implicitly signaled from the NodeB or from the RNC to the user equipment.

Abstract: To meet stringent emission standards and improve performance of two-stroke crankcase-scavenged engines, the muffler (13) of the engine is provided with mixing means (130, 31) for mixing the exhaust gases (42) resulting from the mixture participating in combustion and gases resulting from scavenging, so that a substantially homogenous gaseous mixture is formed within the muffler (13), and means (81) for sensing oxygen concentration is located in the homogeneous gaseous mixture and are configured to provide an output value to a control unit (80) for controlling supply of fuel to the engine and thereby the air-fuel ratio in the combustion chamber (41). The muffler (13) suitably is provided with a catalytic element (140), preferably a three-way catalyst. The engine (1) preferably is a stratified charge engine.

Abstract: A two stroke crank case scavenged two-stroke internal combustion engine, the engine including: —a cylinder (2) configured to reciprocatingly receive a piston (6) therein defining a combustion chamber (8), the combustion chamber comprising an ignition means (5) for igniting an air/fuel mixture and an exhaust port (40) for evacuating the exhaust fumes, —a crank case (3) including a crank shaft (18), —an indirect fuel supply system (4), such as a carburettor (12) or a low pressure fuel-injection system, for supplying fuel to the crank case (3) to be scavenged to the combustion chamber (8), —at least one transfer duct (20, 20?) each extending from the crank case (3) to at least one corresponding transfer port (21, 21?) for connecting to the combustion chamber (8), —additional air filling means (25, 24, 27, 23, 23?, 22, 22?,26, 26?) for at least partly filling the transfer duct/s (20, 20?) with additional air from the transfer port (21, 21?) towards the crank case (3), —and a direct injection means (7) for injecti

Abstract: A user equipment, in a cellular telecommunication system having a plurality of downlink physical channels, detects radio link problems using a subset of said physical channels, where said subset is dynamically adjustable depending upon which channels are available at a particular instant.

Abstract: A method for enhancing Random Access Channel (RACH) performance is provided. First timing settings to be used by a first set of user equipments for a first Acquisition Indicator Channel (AICH) response timing are explicitly or implicitly signaled from a NodeB or from a Radio Network Controller (RNC) to a user equipment. Further, second timing settings to be used by a second set of user equipments for a second AICH response timing are explicitly or implicitly signaled from the NodeB or from the RNC to the user equipment.

Abstract: The present invention relates to methods and devices for use in multi carrier communication systems in which secondary downlink and secondary uplink carriers may be dynamically activated/deactivated by means of transmitting an HS-SCCH order from a radio base station to a user equipment. The HS-SCCH order is encoded by the radio base station according to an order mapping. The order mapping maps a desired activation status of a set of carriers to a corresponding encoded HS-SCCH order. The user equipment interprets the encoded HS-SCCH order to derive the desired activation status of the set of carriers. By using an appropriate order mapping, operations in the radio base station and/or the user equipment may be simplified, e.g. by allowing the radio base station to calculate the encoded HS-SCCH order based on the desired activation status.

Abstract: Channel estimation accuracy is improved by adjusting the power level of a physical control channel allocated to a receiver based on the transmission rate and/or transport format of a corresponding physical data channel allocated to the same receiver. The physical control channel may be a DPCCH, E-DPCCH or other type of physical control channel allocated to a receiver for facilitating uplink or downlink communication. In one embodiment, control channel symbols are transmitted for use in channel estimation by adjusting the power level of a physical control channel allocated to a receiver based on the transmission rate and/or transport format of a physical data channel allocated to the receiver (200). Control channel symbols are transmitted to the receiver over the physical control channel at the adjusted power level (202). The receiver uses the control channel symbols to perform channel estimation (204).

Abstract: Although described herein in terms of UE out-of-sync detection, those of skill in the art will readily recognize that embodiments of the present invention improve in-sync detection for currently out-of-sync UEs 22. That is, if an out-of-sync UE 22 detects sufficiently good channel conditions, it may announce this fact to the network and re-acquire in-sync status. For example, if the UE 22 receives F-DPCH signal transmissions and determines that, e.g., the TPC command error rate is less than a threshold, which is preferably much lower than 30%, over a measurement interval of, e.g., 240 slots (or 160 ms), the UE 22 may conclude that it is in-sync and announce this fact to the network 10. The restrictions of only valid F-DPCH transmissions during the UL DTX gated period will obviously enhance the reliability of this determination, just as is the case in determining out-of-sync status.

Abstract: A two stroke crank case scavenged two-stroke internal combustion engine, the engine including: a cylinder (2) configured to reciprocatingly receive a piston (6) therein defining a combustion chamber (8), the combustion chamber comprising an ignition means (5) for igniting an air/fuel mixture and an exhaust port (40) for evacuating the exhaust fumes, a crank case (3) including a crank shaft (18), an indirect fuel supply system (4), such as a carburettor (12) or a low pressure fuel-injection system, for supplying fuel to the crank case (3) to be scavenged to the combustion chamber (8), at least one transfer duct (20, 20?) each extending from the crank case (3) to at least one corresponding transfer port (21, 21?) for connecting to the combustion chamber (8), additional air filling means (25, 24, 27, 23, 23?, 22, 22?,26, 26?) for at least partly filling the transfer duct/s (20, 20?) with additional air from the transfer port (21, 21?) towards the crank case (3), and a direct injection means (7) for injecting fue

Abstract: The present invention relates to methods and devices for use in multi carrier communication systems in which secondary downlink and secondary uplink carriers may be dynamically activated/deactivated by means of transmitting an HS-SCCH order from a radio base station to a user equipment. The HS-SCCH order is encoded by the radio base station according to an order mapping. The order mapping maps a desired activation status of a set of carriers to a corresponding encoded HS-SCCH order. The user equipment interprets the encoded HS-SCCH order to derive the desired activation status of the set of carriers. By using an appropriate order mapping, operations in the radio base station and/or the user equipment may be simplified, e.g. by allowing the radio base station to calculate the encoded HS-SCCH order based on the desired activation status.

Abstract: Techniques are disclosed for signaling retransmission-related information in a multi-carrier wireless communication system supporting three or more carriers. In an example method, a wireless transceiver forms a first ACK/NACK group by jointly coding ACK bits and NACK bits for a first subset of the carriers, and transmits the first ACK/NACK group during a first transmission slot allocated for the first ACK/NACK group. If no carriers of a second subset of the carriers are activated for the wireless transceiver, then the first ACK/NACK group is also transmitted during a second transmission slot that is otherwise allocated to ACK/NACK information for a second subset of the carriers. In another method, first and second ACK/NACK groups corresponding to first and second subsets of carriers are each formed from a codebook comprising a DTX codeword indicating that no data transmission for the mobile station was detected for the corresponding subset of carriers.

Abstract: A user equipment, in a cellular telecommunication system having a plurality of downlink physical channels, detects radio link problems using a subset of said physical channels, where said subset is dynamically adjustable depending upon which channels are available at a particular instant.

Abstract: Out-of-sync and in-sync detections and downlink power control by UTRAN user equipment are improved in Continuous Packet Connectivity mode featuring discontinuous UL DPCCH transmission by requiring all F-DPCH transmissions from a base station to the user equipment to be valid during a UL DTX gated period. Additionally, the user equipment receives and considers all F-DPCH transmissions during the UL DTX gated period, for power control, out-of-sync and in-sync detections. If the user equipment detects an out-of-sync condition, it may immediately transmit a scheduling request to notify the network, temporarily or permanently annulling the discontinuous UL DPCCH transmission.

Abstract: A crankcase scavenged two-stroke engine (1) comprises a cylinder (15) including scavenging ports (31, 31?) and at least one exhaust port, a piston (13), a connecting rod (17), a crankshaft (18) and a generally sealed crankcase (16). The crankcase inducts a fuel/air mixture and is connected to the scavenging ports (31, 31?) by means of transfer ducts (3, 3?) which, as the piston (13) is travelling from a lower position towards a higher position, are inducting pure air let in from connecting ports (8, 8?) near the scavenging ports (31, 31?) in the cylinder (15). The transfer duct (3, 3?) volume is less than 20% of a volume swept by the piston (13) during an entire revolution of the crankshaft (18). Recesses (10, 10?) are formed in an outer periphery of the piston (13), said recesses (10, 10?) co-operating with the connecting ports (8, 8?) in the cylinder wall for controlling the filling of the transfer ducts (3, 3?) with air.

Abstract: A jetting device and a method of jetting droplets of viscous medium onto a substrate. The jetting device includes a jetting outlet through which the droplets are jetted. The jetting device further includes a wall located at the jetting outlet, downstream of the jetting outlet seen in the jetting direction. The wall is provided with an orifice through which jetted droplets are permitted to pass through. A gaseous flow is provided within the space past the jetting outlet such that an adverse effect on the performance of the jetting device is prevented, the adverse effect resulting from the accumulation of viscous medium residue at the jetting outlet.

Abstract: The invention is a spectrally selective optical coupler with a new geometry and a new principle of action. An optical coupler according to the invention comprises an optical fiber and an external lightguide. In the fiber there is provided a deflector that is operative to deflect light of a predetermined wavelength into a propagating mode of said lightguide. The outcoupled light is transferred to a region remote from the outcoupling portion of the fiber. The invention can be used to couple light from a first to a second optical fiber.

Abstract: A crankcase scavenged two-stroke engine (1) comprises a cylinder (15) including scavenging ports (31, 31?) and at least one exhaust port, a piston (13), a connecting rod (17), a crankshaft (18) and a generally sealed crankcase (16). The crankcase inducts a fuel/air mixture and is connected to the scavenging ports (31, 31?) by means of transfer ducts (3, 3?) which, as the piston (13) is travelling from a lower position towards a higher position, are inducting pure air let in from connecting ports (8, 8?) near the scavenging ports (31, 31?) in the cylinder (15). The transfer duct (3, 3?) volume is less than 20% of a volume swept by the piston (13) during an entire revolution of the crankshaft (18). Recesses (10, 10?) are formed in an outer periphery of the piston (13), said recesses (10, 10?) co-operating with the connecting ports (8, 8?) in the cylinder wall for controlling the filling of the transfer ducts (3, 3?) with air.

Abstract: The invention relates to methods and arrangements for channel balancing of a wavelength division multiplexed optical signal. Channel balancing according to the invention is performed by using a resonator that provides a selection region in which a selected channel has a substantially increased poser density relative to channels out of resonance. The selected channel is attenuated a desired amount, i.e. a desired amount of power is removed therefrom, by adjusting the properties of the selection region. In a preferred embodiment, attenuation is achieved by adjusting the selection region such that destructive interference is obtained for the selected channel in a fiber carrying tile multiplexed optical signal.

Abstract: The invention is a spectrally selective optical coupler with a new geometry and a new principle of action. An optical coupler according to the invention comprises an optical fiber and an external lightguide. In the fiber there is provided a deflector that is operative to deflect light of a predetermined wavelength into a propagating mode of said lightguide. The outcoupled light is transferred to a region remote from the outcoupling portion of the fiber. The invention can be used to couple light from a first to a second optical fiber.