2234 results about "Uplink channel" patented technology

A method for transmitting channel status information (CSI) of downlink multi-carrier transmission includes generating the CSI including at least one of a rank indicator (RI), a first precoding matrix index (PMI), a second PMI and a channel quality indicator (CQI) for one or more downlink carriers, the CQI being calculated based on precoding information determined by a combination of the first and second PMIs, determining, when two or more CSIs collide with one another in one uplink subframe of one uplink carrier, a CSI to be transmitted on the basis of priority, and transmitting the determined CSI over a uplink channel. If a CSI including an RI or a wideband first PMI collides with a CSI including a wideband CQI or a subband CQI, the CSI including a wideband CQI or a subband CQI has low priority and is dropped.

The invention relates to method and apparatus for reconfiguring a MAC entity of a MAC layer of the apparatus receiving protocol data units from a mobile terminal via on uplink upon reconfiguration of the uplink channel. Further, the invention relates to methods and mobile terminals for triggering the transmission of a status report from an RLC entity configured for an uplink channel of a network element in a radio access network, as well as a method and terminal for configuring the MAC layer of the mobile terminal. In order to enable an efficient and fast generation of RLC status reports after an uplink channel reconfiguration the invention suggests new mechanisms to trigger the transmission of status reports upon uplink reconfiguration as well a new operation and configuration of radio access network elements and UEs upon uplink channel reconfiguration, in particular a transmission time interval (TTI) reconfiguration.

In a 3rd Generation Partnership Project, 3GPP, communication system a base station comprises a scheduler allocating communication resource of at least one of a Physical Uplink Shared CHannel, PUSCH, and a Physical Downlink Shared CHannel, PDSCH to a User Equipment (UE). The scheduling may either be a dynamic scheduling wherein a resource allocation for a single frame is provided to the UE or a persistent scheduling wherein a resource allocation for a plurality of frames is provided to the UE. A resource allocator assigns resource of a Physical Uplink Control CHannel, PUCCH, to the UE dependent on whether dynamic scheduling or persistent scheduling is performed by the scheduler for the UE. The UE transmits uplink control data on a physical uplink channel which is selected as the PUCCH or the PUSCH in response to whether persistent scheduling is used for the UE. The invention allows e.g. reduced PUCCH loading.

In order to facilitate sending of different kinds of channel feedback information, a periodic information transmission in a shared uplink channel is configured, PUSCH, and required resources are allocated for the transmission.

Provided are a method for controlling uplink transmission power and a wireless device. The wireless device decides a first transmission power of a first uplink channel, which is transmitted through a first wireless resource from a first serving cell, and decides a second transmission power of a second uplink channel, which is transmitted through a second wireless resource from a second serving cell. The first serving cell belongs to a first timing advance (TA) group, and the second serving cell belongs to a second TA group that differs from the first TA group. All or a portion of the first wireless resource and the second wireless resource overlap, wherein the sum of the first and second transmission powers in the overlapping portion is decided so as not to exceed a maximum transmission power.

In a wireless communication system, a method and apparatus for closed loop transmission is disclosed. In accordance with the preferred embodiment of the present invention, a time frequency portion of an uplink frame is dynamically reserved as a sounding zone for uplink channel sounding. A first message is transmitted to a first subscriber station in a downlink frame assigning a time-frequency resource within the sounding zone, and a sounding waveform. Furthermore, a signal is received from the subscriber station within the assigned time-frequency resource, a partial channel response is determined from the received sounding signal, and the subsequent transmission to the subscriber station is tailored based on the at least partial channel response.

A method and system for optimizing performance in a data-over-cable system. The method includes determining parameters for data transmission on an upstream channel of the data-over-cable system, and negotiating use of the parameters. A measurement is made of a signal-to-noise ratio (“SNR”) on the upstream channel. Associated with the SNR and a target packet-error-ratio (“PER”) are parameters that provide optimal data throughput. The parameters, such as symbol rate, type of modulation, or amount of error correction, are used to construct a message that is sent to the cable modems. The message instructs the cable modems to reconfigure themselves to transmit according to the parameters. The reconfiguration helps ensure optimal performance.

An apparatus and method for adaptive broadcast transmission. A broadcast transmission can be received. Insufficiency of a broadcast channel quality can be determined. A negative acknowledgement signal can be sent on a common uplink channel in response to determining the broadcast channel quality is insufficient. The negative acknowledgement signal can be received on the common uplink channel at another location, the negative acknowledgement signal indicating broadcast channel quality is insufficient. The broadcast channel quality can be adjusted in response to receiving the negative acknowledgement signal.

An uplink signal transmitted by a terminal is received by a satellite wireless communications system. The uplink signal includes a known information element, e.g., a reverse access channel (R-ACH) preamble, spread according to a spreading code specific to a component of a satellite wireless communications system, e.g., a pseudonoise (PN) sequence associated with a satellite beam. A correlation of the received uplink signal with the spreading code over a range of time shifts is determined. The known information element is detected from the determined correlation. The satellite wireless communications system is synchronized with the terminal responsive to detection of the known information element. For example, a delay may be assigned to a receiver of the satellite wireless communications system responsive to detection of the known information element.

A method for using buffer occupancy in uplink scheduling for a communication device includes a first step of sending buffer occupancy information and a time stamp indicating a last transmission opportunity provided to the communication device to an active set base stations. A next step includes utilizing the buffer occupancy information and time stamp to adjust a scheduling fairness setting for the communication device. A next step includes receiving scheduling information from a scheduler in accordance with the scheduling fairness setting. A next step includes transmitting on an uplink channel in accordance with the scheduling information.

Abstract: The invention relates to a method for scheduling in a mobile communication system where data of priority flows is transmitted by mobile terminals via dedicated uplink channels to a base station. Each mobile terminal transmits at least data of one priority flow via one of the dedicated uplink channels. Moreover, the invention relates to a base station for scheduling priority flows transmitted by mobile terminals via dedicated uplink channels to the base station. Further, a mobile terminal transmitting at least data of one priority flow via a dedicated uplink channel to a base station is provided. In order to optimize base station controlled-scheduling functions in a mobile communication system the invention proposes to provide the scheduling base station with QoS requirements of individual priority flows transmitted via an uplink dedicated channel and to adapt the mobile terminals to indicate the priority flows of which data is to be transmitted to the base stations for scheduling.

A method of controlling a transmit power of an uplink channel is provided. Downlink control information of which Cyclic Redundancy Check (CRC) parity bits are masked with a TPC identifier is received on a downlink control channel. The transmit power of the uplink channel is adjusted based on a TPC command in the downlink control information.

An uplink and downlink channel structure supports a shared downlink data channel. The new structure accommodates advanced physical and Medium Access Control (MAC) layer techniques, such as incremental redundancy (IR), fast adaptation to channel conditions, and multiple input multiple output (MIMO) antenna configuration. The proposed changes are intended to lead to a downlink structure that achieves higher spectral efficiency for the packet oriented services over then shared downlink channel. Additionally, the new structure uses the base station transmit power information and of the channelization (OVSF) code space more efficiently.

The present invention relates to communicating control information in a mobile communication system, wherein the control information of a mobile terminal for scheduling an uplink channel may be notified to a network quickly with less power. The present invention comprises transmitting a data block on a first physical channel, wherein the data block comprises control information, and transmitting an indicator having a specific value on a second physical channel for indicating the transmission of the control information on the first physical channel.

Various methods of allocating uplink control channels in a communication system are implemented at a resource scheduler or a user equipment (UE). In one method the scheduler reserves resources for a downlink data channel and signals a corresponding downlink data channel grant and also reserves resources for a persistent uplink control channel for a longer duration than the data channel grant. Signaling overhead associated with a grant for this persistent uplink control channel is reduced over a full dynamic grant. A predetermined rule can be used at the scheduler and at the UE to avoid overhead signaling associated with a grant for this persistent control channel. Predetermined rules at the UE and scheduler can also be used to reserve appropriate resources and select appropriate MCS levels for control information and the control information and uplink data can be transported over a common uplink channel when a time overlap occurs between an uplink data channel and the persistent control channel.

The present invention centers upon uplink communication protocols for use primarily with orthogonal frequency division multiple access (OFDMA) communication systems. Aspects of the invention relate to narrow band frequency division multiplexed (NBFDM) modulation protocols primarily for uplink usage in asymmetric OFDMA communication systems. In particular, NBFDM uplinks that use quadrature multiplexed continuous phase modulation are detailed and noncoherent detection schemes are developed to process the uplink channel signals without the need to transmit uplink phase reference signals. Other aspects of the invention relate to burst mode uplink communications in OFDMA systems such as those involving opportunistic beamforming.

A communicating system is disclosed. The communicating system has a base station and a plurality of mobile stations that radio-communicate through an uplink channel and a downlink channel with frames each of which is composed of a plurality of time divided slots, each of the frames of the uplink channel and the downlink channel being transmitted in accordance with OFDM transmitting system. An OFDM sub carrier used in the OFDM transmitting system is divided in accordance with a predetermined diving method, each of the frames of the uplink channel or downlink channel being allocated to the divided portions of the OFDM sub carrier, a plurality of frames of the uplink channel or downlink channel being radio-communicated between one base station and a plurality of mobile stations.

A multi-hop wireless communication network is disclosed, which includes a fixed communication unit, at least one mobile communication unit, and a relay communication unit. The relay communication unit is operable to relay a plurality of signals bi-directionally between the fixed communication unit and the at least one mobile communuication unit, by receiving a first signal on at least one of a dedicated sub-carrier and a dynamic sub-carrier in a first downlink channel segment from the fixed communication unit, and transmitting the received first signal to the at least one mobile communication unit on a dynamic sub-carrier in a second downlink channel segment. Also, the relay communication unit is operable to receive a second signal on a dynamic sub-carrier in a first uplink channel segment from the at least one mobile communication unit, and transmit the received second signal to the fixed communication unit on at least one of a dedicated sub-carrier and a dynamic sub-carrier in a second uplink channel segment. Also, the fixed communication unit can allocate bandwidth dynamically or in a fixed amount in the first downlink channel segment, the relay communication unit can allocate bandwidth dynamically in the second downlink channel segment based on at least one Quality of Service value received from the at least one mobile communication unit, the relay communication unit can allocate bandwidth dynamically for the at least one mobile communication unit in the first uplink channel segment, and the fixed communication unit can allocate bandwidth dynamically or in a fixed amount for the relay communication unit in the second uplink channel segment.

The invention relates to a mobile terminal communicating resource requests for dedicated uplink channel resources in a mobile communication system. Further, the invention also relates to a method for communicating resource requests for dedicated uplink channel resources in a mobile communication system. To allow the serving cell to detect “DOWN” commands from non-serving cells during soft handover the invention suggests a new definition of criteria for setting the “happy bit” in the control information associated to data transmitted on dedicated uplink channels. According to these criteria the mobile terminal may not indicate an unhappy condition while ramping up resource utilization. Only if resources equivalent to the maximum serving grant are utilized, the transmission buffer status requires to and the power status of the terminal allows for the happy bit is set to indicate a unhappy condition.

An improved method for packet transmission scheduling and an improved packet transmission scheduling system in mobile telecommunication systems. Both the improved method and the system especially adapted to be used for UMTS systems. A quality of service scheduling of multiple data flows in a mobile telecommunication system is proposed, wherein a priority order of protocol data units (PDU) of multiple data flows with regard to predefined flow's quality of service requirements is determined, a serving of the protocol data units (PDU) is performed by dynamically determining transport blocks (TB) to be transmitted by the physical layer (PHY-layer) with regard to the defined priority order and in dependence of allocated radio resource constraints, by assigning to each transport block (TB) a respective associated transport format (TF), and by creating transport block sets (TBS) with the determined transport blocks (TB) to be transmitted by the physical layer (PHY-layer) by using the respective associated transport format (TF) as assigned.

An apparatus and method for adaptive broadcast transmission. A broadcast transmission can be received. Insufficiency of a broadcast channel quality can be determined. A negative acknowledgement signal can be sent on a common uplink channel in response to determining the broadcast channel quality is insufficient. The negative acknowledgement signal can be received on the common uplink channel at another location, the negative acknowledgement signal indicating broadcast channel quality is insufficient. The broadcast channel quality can be adjusted in response to receiving the negative acknowledgement signal.

The invention discloses a multi-antenna sending method based on a sounding reference signal, a terminal, and a base station. Newly-added SRS sending port information and / or an SRS sending mode for indicating signals sent by a UE standby execution antenna set by turns and a control signal required by the SRS sending mode are sent to UE through eNB. The UE sends the SRS through the SRS sending mode, and the eNB estimates channel information according to the SRS and calculates and sends a pre-coding matrix. By means of the method, the terminal and the base station, the problem that when the number of receiving antennas of the UE is larger than the number of sending ports and the number of downlink configuration ports is larger than 2, downlink pre-codes calculated by the eNB according to the uplink channel matrix can not be matched with wireless channels between all the antennas of the UE and an antenna of the base station is solved; the UE can be used for solving the problem that when the number of sending antennas is larger than the number of the sending ports, the eNB has difficulty in completely obtaining the states of wireless channels between all the antennas of the UE and the eNB and the PUSCH can not be set through the optimal antenna or the optimal antenna set.

The present invention relates to methods for controlling a plurality of base stations in a mobile communication system comprising a communication terminal, the plurality of base stations and a control unit connected to the plurality of base stations, wherein the communication terminal is in a soft handover. Further, the present invention relates to methods for signaling uplink channel quality characteristics, that are considered when controlling the plurality of base stations. Finally, the present invention relates to a base station, the control unit and the communication terminal which are specifically adapted to perform the control method and the signaling method respectively. To reduce the signaling load on the wired interface between a base station and a control unit the present invention selects a serving base station based on uplink channel quality characteristics and controls one or more of the base stations except the serving base station not to transmit data via the wired interface.

The present disclosure relates to a method and apparatus for uplink channel access in a High Efficiency WLAN (HEW). According to one aspect, a method for transmitting an uplink frame by a station (STA) to an access point (AP) in a wireless local area network may be provided. The method may include receiving from the AP a trigger frame for eliciting an uplink transmission from the STA, transmitting to the AP the uplink frame according to a type of the trigger frame, wherein when the uplink frame is transmitted in an uplink multiple user (MU) transmission, the uplink frame includes a padding added by the STA such that transmissions from a plurality of STAs including the STA in the uplink MU transmission end at a same time indicated by the trigger frame, and receiving from the AP a frame in response to the uplink MU transmission a predetermined time after an end of the uplink MU transmission.

Embodiments of methods of assigning a channel to a link of an access node within a wireless mesh network, is disclosed. The method includes the access node receiving beacons over multiple channels, from at least one upstream device, and the access node selecting an uplink channel based upon the received beacons. Additional methods include the access node selecting a downlink channel so that different channels are assigned to consecutive links within a data path between a gateway and a down stream device. The different channels can include non-overlapping channels, or a combination of non-overlapping and at least partially overlapping channels. The method can further include selecting a downstream link channel based upon predetermined sequences of channel selections, and a hop count of the access node.

The invention provides a method and a system for indicating an idle state of a channel or reserving resources, a method and a system for indicating an idle state of an uplink channel or reserving the resources, an LTE (Long Term Evolution) terminal, an LTE base station and an LTE system. The method for indicating the idle state of the channel comprises the following steps of setting a channel monitoring sub-frame used for detecting the state of the channel in a frame structure in a time division or frequency division duplex mode; if the channel monitoring sub-frame internally detects that the channel is in the idle state, sending an indication, representing that the channel is in the idle state, to the terminal through a channel idle state signaling or a resource reservation signaling, and sending an indication, representing that the channel is occupied by the base station, to communication equipment requesting to occupy a non-authorized frequency band. According to the technical scheme, the understandings of the idle state of the channel and the reservation state of the resources by the terminal and the base station working in the non-authorized frequency band are consistent, and data based on the same core network can be seamlessly switched and transmitted in an authorized frequency band and the non-authorized frequency band.

Apparatuses, methods, and systems are disclosed for communicating a short-duration uplink channel. One apparatus includes a transceiver that receives a downlink scheduling assignment message from a base unit, the scheduling message assigning resources for reception of a TB. The apparatus includes a processor that identifies a set of uplink resources in a slot and determines a first uplink resource from within the set. Here, selecting the first uplink resource is based on: a RB index of a first assigned FRU of the TB, a lowest CCE index of the scheduling message, a HARQ-ACK feedback delay, and / or a HARQ-ACK resource index / offset indicated in the scheduling message. Additionally, the transceiver transmits a first uplink channel conveying at least HARQ-ACK feedback for the TB on the first uplink resource, wherein the first uplink channel comprises one or two symbols in the slot.

In various embodiments of the present invention, methods are provided for transmitting scheduling requests over uplink channels. One embodiment includes determining whether a first resource for transmission of a scheduling request over an unscheduled uplink control channel is allocated concurrently with a second resource for transmission of user data over a scheduled uplink shared channel. This embodiment also includes encoding the user data and bit(s) of control information to form encoded information for transmission using the second resource. The additional bit(s) indicate whether the mobile unit is transmitting the scheduling request. Another embodiment includes determining whether a first resource for transmission of a scheduling request over an unscheduled uplink control channel is allocated concurrently with a second resource for transmission of other control information over the unscheduled uplink control channel. This embodiment includes modulating the scheduling request and the other control information into one symbol for transmission using the first resource.