515 results about "High-Speed Downlink Packet Access" patented technology

An apparatus and method for allocating a frequency resource to a user equipment (UE) in an orthogonal frequency division multiplexing (OFDM) mobile communication system. A base station receives feedback information including at least mobility information from the UE, and determines from the mobility information whether the UE belongs to a fast group or a slow group. The base station allocates a frequency resource for the UE according to an open-loop solution if the UE belongs to the fast group, allocates a frequency resource for the UE according to a closed-loop solution if the UE belongs to the slow group, and transmits data for the UE using the allocated frequency resource.

In an adaptive modulation and coding method one or more adjustable values are created (S1), each corresponding to at least one of a plurality of available modulation and coding levels applicable to a signal transmitted from a transmitter to a receiver, and each representing a change to the level(s) to which it corresponds. One or more of said adjustable values is/are adjusted in dependence upon whether or not the signal is received successfully by the receiver (S2-S5). One of said available modulation and coding levels is selected (S6-S8) to apply to the signal based on such an adjustable value. Such a method can enable the appropriate modulation and coding level to be selected even when the path and channel conditions vary. The method is applicable to selecting modulation and coding levels in a high-speed downlink packet access system of a wireless communication network.

A method for improving the data processing speed in a mobile communication system employing a High Speed Downlink Packet Access (HSDPA) is provided. A data unit for the HSDPA services is generated by adding a field for identifying a destination logical channel to the header of the data unit and inserting a header padding field into the header, and transmitting the generated data unit.

Updating the next-expected transmission sequence number (NET) or the receiver window position to ensure that the NET always falls within the receiver window range to prevent unnecessary delays in delivering data blocks in order to avoid stall conditions and achieve high speed data transmission capabilities for a high-speed downlink packet access (HSDPA) system.

A system and method for enhancing service over a high-speed downlink packet access (HSDPA) service in a cellular communication network includes informing a UE of the cells in an HSDPA active subset of cells. The US makes a measurement of the cells and selects a best cell for switching. The UE determines whether the best cell is an intra-node B cell or inter-node B cell with the serving cell from the network. If the best cell is an intra-node B cell, the UE signals the node B of the best cell, the node B switches to the best cell directly and UE receives the data from the target cell directly, and then Node B reports the switch to a radio network controller (RNC) that completes the final switching to the best cell by the RNC. If the best cell is an inter-node B cell, the UE signals the RNC of the best cell directly, whereupon the RNC sends the UE an acknowledgment without waiting for the completeness of the network configurations. The RNC re-routes data to the best cell, and the UE switches to the best cell after receiving the acknowledgment.

A high speed downlink packet access base station (HSPDA Node B) and a method therefore working in acknowledged mode (AM), the base station being adapted for unicast transmission on a physical downlink shared channel (HS-DSCH), by preceding announcement on a shared control channel (HS-SCCH) which shared control channel may be decoded by a given user entity using its own identity (UE-ID), each user entity (UE) being adapted for transmitting an acknowledge (ACK) or non-acknowledge (NACK) message pertaining to the reception of the given transmission on an uplink dedicated physical control channel (HS-DPCCH) pertaining to a given HARQ process of a given individual user entity. The base station is performing multicast transmissions (11, 401) on the physical downlink shared channel (HS-DSCH) by preceding announcement on the shared control channel (HS-SCCH) coded with a multicast identity (MU-ID) of a reserved address space, which downlink shared channel (HS-SCCH) may be decoded simultaneously by a plurality of user entities, wherein each user entity is using the multicast identity (MU-ID) instead of the user entity's respective user identity. A user entity and a method therefore have moreover been provided.

A method of controlling link adaptation and packet scheduling in an HSDPA (High Speed Downlink Packet Access) radio system and an HSDPA base station communicating over a control channel with one or more user equipment units is provided. According to one embodiment the base station includes a device for receiving feedback information from the user equipment. The base station further includes a device for calculating a quality estimate related to the feedback information and executing link adaptation and packet scheduling based on the calculated quality estimate.

A flow control system and method is provided for efficiently transmitting high-speed downlink packet access (HSDPA) packet data between a radio network controller (RNC) and a Node-B in a wideband code division multiple access (WCDMA) system/universal mobile telecommunications system (UMTS).

A method for transmitting pilot bits instead of partial bits of CQI (Channel Quality Indicator) information indicating channel quality of an HS-PDSCH (High Speed-Physical Downlink Shared CHannel) in a CDMA (Code Division Multiple Access) communication system such that a Node B can control power of a high-speed uplink control channel. The system transmits high-speed packet data from the Node-B to UE (User Equipment) through the HS-PDSCH, and the UE is located in a handover area between the Node-B and another Node-B adjacent thereto. Predetermined bits are then removed from given bits of the code symbols. The removed bits are then replaced with high-speed pilot bits for power control.

A method (100) and corresponding equipment, the method for enabling a Node B/base station (14) to distinguish different states—HARQ active states and a DTX (non-transmitting) state—of a UE (12) in respect to use of the feedback HSDPA (high-speed downlink packet access) channel HS-DPCCH over which the UE (12) sends acknowledgement messages (ACK/NACK) to the Node B (14) in response to receiving packets via the HSDPA (downlink) data channel HS-DPCH, the method including steps (41 42) in which the UE (12) additionally sends preamble symbols if an acknowledgement message (ACK/NACK) is to be sent in a next time interval but not in the current time interval, and at least one postamble symbol prior to the UE (12) entering the non-transmitting state (DTX).

Method for transmission of broadcast- and/or multicast-data within a mobile communication system, preferably according to HSDPA technology (High Speed Downlink Packet Access), wherein the communication system has a multitude of mobile terminals (UE) is characterized in that—regarding a high level of efficiency of data transmission—selectable terminals (UE) within a radio cell of the communication system are combined as a group of terminals (UE) and that the group of terminals is assigned a common group identifier which serves as destination address for the data transmission.

Disclosed is a method for controlling uplink transmission power in a handover region by a UE in communication with a Node B using an FCS scheme. The UE stores TPC commands received for a specific duration from a plurality of cells in an active set, if the UE enters in the handover region during communication with a current best cell. If a next best cell is selected from the plurality of the cells, the UE determines a transmission power offset by comparing TPC commands from the current best cell with TPC commands from the next best cell for the specific duration at a time point where the best cell is changed from the current best cell to the next best cell. The UE transmits initial transmission power for the next best cell at a transmission power level determined considering the transmission power offset.

A method by which resources of a cell under the supervision of a controlling radio network controller (CRNC) are reserved for providing high speed downlink packet access via a high speed downlink shared channel (HS-DSCH) having one or more corresponding physical channels (HS-PDSCHs), the method including as steps: a step (61) in which the CRNC for the Node B serving the cell sends to the Node B a message conveying cell-specific high speed downlink packet access HSDPA information indicating codes for the HS-DSCH and for an associated high speed shared control channel (HS-SCCH) and also indicating a maximum allowed value for the combined power of the HS-SCCH and the HS-PDSCHs; and a step (63) in which the Node B communicates to the CRNC a cell-specific HSDPA resource response indicating either the resources the Node B has reserved or indicating only whether or not all the resources requested by CRNC were successfully reserved.

The modulation indication bit is interpreted as a QPSK/xQAM modulation indication if both the user equipment and the serving cell support 64QAM modulation, such that if QPSK is indicated, the 7 code-set information bits in the HS-SCCH part 1 structure is interpreted as is presently interpreted today as defined in the 3GPP release 5 specification, and if xQAM is indicated, the 7 code-set information bits in the HS-SCCH part 1 structure is interpreted such that only 6 bits are used for code information and one bit is stolen for use for the 16QAM/64QAM selection.

A de-rate matching method and apparatus in a High Speed Downlink Packet Access (HSDPA) system are provided. In the de-rate matching apparatus and method, a collection buffer temporarily stores a received packet, a combining buffer stores the packet received from the collection buffer according to predetermined memory address information including information indicating the positions of bits punctured during the rate matching, a controller decodes high-speed shared common control channel (HS-SCCH) information including a predetermined hybrid automatic repeat request (HARQ) parameter received from the transmitter and provides overall control to de-rate matching between the collection buffer and the combining buffer, an address generator generates the memory address information based on the decoded HARQ parameter, an address buffer stores the memory address information, and a zero inserter initializes at least one of data stored at memory addresses of the combining buffer including memory addresses for the punctured, before the de-rate matching.

A channel for multicarrier high speed downlink packet access and a method for allocating the carrier resource include: the wireless network controller configures the multicarrier high speed downlink packet access resource of a multicarrier cell, the multicarrier high speed downlink packet access resource includes the high speed physical downlink shared channel resource, the high speed shared control channel and the high speed shared information channel pair resource. The resource is managed and allocated by the node B. The wireless network controller allocates the associated—dedicated physical channel according to the recorded original configuration information and original allocation information of each carrier, and sends the configuration information to the node B, then the node B allocates the high speed physical downlink shared channel carrier resource, the associated high speed shared control channel and the high speed shared information channel pair resource.

A user equipment (UE) located in a soft handover region transmits channel quality indicator (CQI) information bits for informing a Node B of quality of a downlink channel through a CQI field and a high speed pilot (HS-Pilot) field constituting a subframe of an uplink secondary dedicated physical control channel (DPCCH) in a code division multiple access (CDMA) communication system. The UE outputs a codeword of length 20 by coding the CQI information bits with a code of length 20, which is used when a high speed downlink packet access (HSDPA) service is not supported, and permutes 15 coded bits coded by the same code, as a code of length 15, which is used when the HSDPA service is supported, among 20 coded bits constituting the codeword, thereby locating the 15 coded bits in the CQI field, and permutes the 5 remaining coded bits to be located in the HS-Pilot field.

The invention discloses a packet scheduling method in high speed downlink packet access HSDPA network. The method includes: A. according to channel quality indication CQI information of priority queuing which is reported by presidial user equipment UE in current transmission time interval TTI, downlink average speed of PQ packet data transmitted to UE, data bulk of PQ packet data cache stored in RNC and scheduling priority index for PQ which is arranged by RNC, a Node B obtains PQ priority; B. the PQ priority sequence is different UE distribution radio resource, the Node B transmites packet data to UE through distributed radio resource. The method not only guaranteens system throughput and UE impartiality, but also guaranteens packet data QoS level and UE priority.

The invention discloses a method for carrier distribution in high-speed descending chain group access technique, comprising that a base station NodeB selects carrier from a carrier group distributed for a user device UE, and distributes the carrier meeting preset condition to the UE. The invention also discloses a relative device.

A wireless (radio) communication system having a high-speed packet communication function, which is based on an HSDPA (High Speed Downlink Packet Access) system, the wireless communication system including a base station control device, the base station control device including a unit receiving from a handover source base station, when handover of a wireless terminal occurs between plural base stations under control, residual packet information about a packet remaining untransmitted to the wireless terminal from the handover source base station, and a unit transmitting, when receiving the residual packet information, a packet corresponding to the residual packet information to a handover destination base station in preference to a packet in a next transmission standby status.