913 results about "Uplink scheduling" patented technology

In a communications system which complies with LTE including a base station 2 which transmits data by using an OFDM (Orthogonal Frequency Division Multiplexing) method as a downlink access method, and a mobile terminal 3, in a case in which an uplink scheduling request signal SR is transmitted by using an S-RACH when an Ack / Nack signal is being transmitted by using an Ack / Nack exclusive channel, the transmission of the Ack / Nack signal is stopped while the uplink scheduling request signal SR is transmitted.

The present invention provides an advantageous method for transitioning reliably between scheduling modes on an uplink in a wireless communication system. Transitions between scheduling modes are effected as far as possible using signaling between a wireless communication device and a base station, providing low delay transitions in the majority of cases. Advantageously, signaling direct between the wireless communication device and a network control element may be employed. In addition, the method may operate effectively even when the wireless communication device is in communication with a number of base stations in a soft handoff situation because the network control element may act to ensure that all base stations correspond to the current scheduling mode employed by the wireless communication device.

A bandwidth allocation method for an uplink data transmission between a mobile subscriber station and a base station in a broadband wireless access communication system. The method includes inserting type information of a service requested by the mobile subscriber station into the access channel signal and transmitting the access channel signal to the base station, receiving uplink scheduling information according to the type of the service requested by the mobile subscriber station from the base station, and transmitting data using a transmission bandwidth allocated according to the uplink scheduling information.

In some implementations, a method implemented in a user equipment UE for single carrier frequency division multiple access SC-FDMA within a wireless system includes receiving an assignment of a plurality of uplink scheduling request resources and comprising a plurality of SC-FDMA subcarriers of the wireless system. One of the plurality of uplink scheduling request resources is selected for transmission of scheduling requests. It is determined that a change in uplink scheduling request resource should be made. Upon determining that a change in scheduling request resource should be made, another of the assigned uplink scheduling request resources is selected for transmission of scheduling requests.

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.

The present disclosure mainly relates to improvements for the buffer status reporting and the logical channel prioritization procedures performed in the UE, in scenarios where the UE is in dual connectivity and the PDCP layer of the UE is shared in the uplink for MeNB and SeNB. According to the present disclosure, a ratio is introduced according to which the buffer values for the PDCP are split in the UE between the SeNB and the MeNB according to said ratio.

A method for handover of a wireless subscriber communication unit from a first base station to a second base station in a wireless network is described. The method comprises at the wireless subscriber communication unit receiving a handover command message from the first base station. At the first base station, the method comprises sending a scheduling request message to the second base station, in response to an acknowledgement message sent from the wireless subscriber communication unit. The method further comprises, at the second base station, scheduling, in response to the scheduling request message, at least one uplink scheduling resource (UL-SCH) for the wireless subscriber communication unit to transmit a handover (HO) confirmation message to the second base station; and receiving a handover confirmation message from the wireless subscriber communication unit on the at least one uplink scheduling resource (UL-SCH).

In some implementations, a method implemented in an eNodeB (eNB) base station for single carrier frequency division multiple access SC-FDMA within a wireless system includes assigning to a user equipment a plurality of uplink scheduling request resources each comprising a plurality of subcarriers. It is determined that change in scheduling request resource used by the UE should be made. Upon determining that a change in scheduling request resource should be made, a command is transmitted to the UE instructing the UE to transmit scheduling requests on another of the plurality of assigned scheduling request resources.

Disclosed is a method and apparatus for transmitting an uplink scheduling request in a mobile communication system. A radio resource controlling node sets a priority for scheduling request retransmission, and cyclically notifies the priority in downlink. A terminal does not retransmit a scheduling request when the highest priority included in the scheduling request to be retransmitted is lower than the lowest priority for scheduling request retransmission. Alternatively, the radio resource controlling node sets scheduling request retransmission cycles (timers) according to priorities, and transmits the cycles in the downlink. The terminal does not retransmit a scheduling request before a cycle (timer) corresponding to the highest priority included in the scheduling request expires after the scheduling request is initially transmitted or retransmitted.

Embodiments of a system and methodology are disclosed for aperiodic (i.e., non-periodic) feedback of channel-side information, such as channel rank information, to a base station by having the receiver / UE initiate the feedback instead of using a scheduled feedback approach. The autonomous feedback of channel-side information may use one of several different types of physical channel structures for uplink scheduling requests, such as those being discussed for inclusion in the emerging LTE platform standard.

A method of transmitting feedback data in a multiple antenna system comprises receiving a request message of feedback data on a downlink channel, the request message comprising uplink scheduling information, selecting a set of M (M≧1) subbands within a plurality of subbands, generating the feedback data, the feedback data comprising a frequency selective PMI (preceding matrix indicator), a frequency flat PMI, a best band CQI (channel quality indicator) and a whole band CQI, and transmitting the feedback data on a uplink channel allocated to the uplink scheduling information.

Disclosed are an uplink data transmission method in a wireless communication system and a device therefor. Particularly, a method for transmitting uplink data in an unlicensed band by a user equipment (UE) in a wireless communication system may comprise the steps of: receiving, from a base station, uplink scheduling information within a cell operating in an unlicensed band; sensing a channel of the cell; transmitting a reservation signal when the channel is sensed to be in an idle state; and transmitting, to the base station, uplink data in a wireless resource allocated on the basis of the uplink scheduling information, wherein the channel is sensed to be in the idle state when energy detected, except for the reservation signal transmitted from another UE that is co-scheduled along with the UE for uplink multi-user multiple input multiple output (UL MU-MIMO) transmission, is smaller than a predetermined threshold value.

The invention provides an unlicensed spectrum-based data transmission method and device. The unlicensed spectrum-based data transmission method includes the following steps that: an uplink scheduling command transmitted by a base station is received; frequency resources on an unlicensed spectrum which are allocated for a terminal by the base station are determined; whether a channel on the frequency resources is idle is detected; and when it is detected that the channel on the frequency resources is idle, the channel on the frequency resources is continuously occupied to transmit uplink data to the base station. With the unlicensed spectrum-based data transmission method provided by the technical schemes of the invention adopted, the channel of the unlicensed spectrum is continuously occupied to transmit the uplink data when it is detected that the channel of the unlicensed spectrum is idle, and therefore, detection time of the channel of the unlicensed spectrum can be decreased, and the utilization rate of the channel of the unlicensed spectrum in an uplink transmission process can be improved for the terminal, and the transmission efficiency of the uplink data can be also improved.

Provided is a wireless mobile communication system in which a mobile station reports a headroom value indicating the magnitude of currently used transmission power and additionally usable transmission power. An uplink scheduling method of a Base Transceiver Station (BTS) includes normalizing the headroom value according to a pre-set reference transmission format; determining a mean data rate of the mobile station; and determining a priority of the mobile station considering the normalized headroom value and the mean data rate.

For lack of a unique, specific and detailed specification for information on the status of a mobile station to be notified by the mobile station to a fixed station, the operation may be varied from one mobile station to another in a communication system, thereby posing a problem that an efficient uplink scheduling (radio resource assignment) is impossible.In view of this, a communication method according to the present invention includes a transmission process for multiplexing a transport channel for transmitting data from a high-order layer on a physical data channel and transmitting the multiplexed result to the fixed station, a status notification process for notifying status information containing information on a transmission power headroom used for scheduling, and a transmission control process for receiving the scheduling result and controlling the transmission process, wherein the status information notification process includes a process of notifying an index attached to each predetermined transmission power headroom level classified between upper and lower limit values of the transmission power headroom as the status information.

A method and an apparatus for improving power efficiency of a User Equipment (UE) by using channel state information between a Node B and the UE and power headroom information of the UE in a mobile communication system. The method includes acquiring power information in relation to transmission powers of UEs; arranging the UEs in a sequence based on the power information; determining, for each UE according to the arranged sequence, whether a first reception power of a Node B exceeds a second reception power; allocating a resource area including partially consecutive sub-carriers to at least one corresponding UE when the first reception power exceeds the second reception power; allocating a resource area including entirely consecutive sub-carriers to at least one corresponding UE when the first reception power does not exceed the second reception power; and transmitting resource allocation information indicating the allocated resource area to the each UE.

The embodiment of the invention provides an uplink resource allocation method and device. The method comprises the following steps: a terminal receives one or more UL grants; and when performing uplink resource allocation on each of the UL grants, based on a mapping relation between bearer or logical channels and numerologies and / or TTI (Transmission Time interval) lengths, the terminal allocates uplink resources to the bearer or logical channels whose supportable maximum numerologies and / or TTI lengths are equal to the numerology and / or the TTI length corresponding to the UL grant and which have data in need of being transmitted. The problem that a transmission resource of a service which has a low priority but is relatively sensitive to a time delay is preempted by a service having a high priority is solved.

A method of transmitting a scheduling reference signal (SRS) for uplink scheduling is provided. The method includes transmitting a SRS on a first partial SRS transmission band in a first transmitting time, and transmitting the SRS on a second partial SRS transmission band in a second transmitting time, wherein the first and the second partial SRS transmission bands are parts of a full SRS transmission band and have exclusive positions with each other in the full SRS transmission band, the full SRS transmission band selected for uplink scheduling, the full SRS transmission band comprising a plurality of partial SRS transmission bands.

The present application provides methods, devices and transmitters that mitigate increases in peak to average power ratio (PAPR) from transmission diversity in a single carrier frequency division multiple access (SC-FDMA) modulated uplink A PAPR preserving precode matrix hopping method that utilizes cyclic shift delays is provided, as well as a sub-band based transmit diversity scheme. The present application also provides methods, devices and transmitters that relax the scheduling restrictions associated with uplink scheduling in the LTE standard.

A method for processing data in a wireless communication system is provided. The method includes receiving a first uplink scheduling command indicating a first radio resource, receiving a second uplink scheduling command indicating a second radio resource through a random access response, and stopping a procedure associated with the second uplink scheduling command when the first radio resource and the second radio resource collide.

A bandwidth recovery method for a communication system includes: transmitting a first uplink scheduling message to at least a first communication node and a second communication node of a plurality of communication nodes in the communication system; detecting if a communication channel is in an idle state after a first transmission start time; then, transmitting a second uplink scheduling message to the plurality of the communication nodes when the communication channel is found to be in the idle state after the first transmission start time.

The invention discloses an uplink subframe scheduling method for a time division multiplexing system. The method comprises the following steps that: after receiving a scheduling request transmitted by a user terminal, a base station selects an uplink scheduling mode from multi-subframe uplink scheduling and bundling subframe uplink scheduling, and informs the user terminal of the selected uplink scheduling mode through an uplink scheduling authority; and the user terminal transmits uplink data in the uplink scheduling mode selected by the user terminal by adopting the base station. If the base station selects the multi-subframe uplink scheduling mode for the user terminal, then the uplink scheduling authority which comprises an uplink index is transmitted to the user terminal; and if the base station selects the bundling subframe uplink scheduling mode for the user terminal, then the uplink scheduling authority which does not contain the uplink index is transmitted to the user terminal. The uplink subframe scheduling method of the invention can select the multi-subframe uplink scheduling and the bundling subframe uplink scheduling dynamically according to factors of a channel condition, position information, a moving speed and the like of the user terminal.

A method of an uplink scheduler for a base station in a wireless communication system is provided. The wireless communication system performs uplink wireless access for a best effort service, based on random access. The uplink scheduler of the base station transmits downlink traffic data to a user terminal, and estimates uplink traffic data generated from the user terminal based on the downlink traffic data. In addition, the uplink scheduler allocates resources for the estimated uplink traffic data to the user terminal, and receives the uplink traffic data transmitted from the user terminal by using the resources allocated to the user terminal.

The embodiment of the invention discloses a method, a device and a system for reporting power headroom. The method comprises the following steps of: judging whether to trigger power headroom reporting (PHR) by user equipment; and if the PHR is triggered, performing independent PHR or combined PHR based on a component carrier (CC) or a power amplifier (PA) by the user equipment. The independent PHR or the combined PHR is performed on the CC or the PA in the embodiment of the invention so that power headroom reporting in a multi-carrier system is realized and the base station equipment can well perform uplink scheduling according to the power headroom from the user equipment.

The invention discloses an uplink-grant-free resource allocation method, user equipment and a base station. The resource allocation method in an embodiment includes: the user equipment acquires resource pool information pre-allocated by the base station, wherein the resource pool includes a plurality of time-frequency domain resources; before uplink grant is received, the user equipment selects one or more time-frequency resources from the resource pool to realize uplink data transmission. Time delay can be effectively reduced while data transmission efficiency is improved.

An embodiment of the invention discloses an upward resource scheduling method of a TDD system, a system and a device, realizing dynamic scheduling on the upward resource on the basis of ensuring optimal transmission performance. The upward resource scheduling method comprises: a base station distributes upward resources for transmitting upward data on the user equipment, and transmits upward resource distribution information including upward sub-frame indexes in the sending time span corresponding to the upward sub-frame occupied by the upward resource, the sending time span corresponding to the upward sub-frame is arranged in advanced; the user equipment receives the distribution information, determines the upward sub-frame according to the upward sub-frame indexes and the upward sub-frame scheduling strategy, and transmits the upward data on the upward resource indicated by the distribution information in the upward sub-frame. An upward resource scheduling system comprises: user equipment and a base station. The embodiment of the invention also discloses a base station and user equipment.

The invention provides uplink / downlink scheduling information transmitting and receiving methods and a device. The downlink scheduling information transmitting method includes determining a first downlink subframe in a downlink subframe on a second carrier, and defining a subframe at the moment, corresponding to that of the first downlink subframe, on a first carrier as an uplink subframe; transmitting downlink scheduling information corresponding to the first downlink subframe on the second carrier to a terminal on a fifth downlink subframe on the first carrier; and leading the moment corresponding to the fifth downlink subframe to be prior to the moment corresponding to the first downlink subframe. The uplink scheduling information transmitting method includes determining a first uplink subframe in an uplink subframe on the second carrier; transmitting uplink scheduling information corresponding to the first uplink subframe on the second carrier to the terminal on a sixth downlink subframe of the first carrier; and leading the moment corresponding to the sixth downlink subframe to be prior to that of the first uplink subframe. The purpose of uplink and downlink scheduling is realized by the aid of the first carrier and the second carrier which carry a PDCCH (physical downlink control channel).

One objective of the present invention is to provide uplink scheduling information reporting apparatus and System supporting multi-connectivity. Herein, a UE connected to multiple eNBs, the UE receives trigger configuration information about buffer status report of a logical channel group that a corresponding radio bearer belongs to, and radio bearer configuration information and uplink resource configuration information respectively corresponding to each of the multiple eNBs, when the BSR trigger condition of at least one of the multiple eNBs is satisfied, transmit to a corresponding eNB the buffer status report of the logical channel group that its corresponding radio bearer belongs to, so as to support uplink scheduling report in multi-connectivity. The reporting mechanism provides the serving eNB with information about data amount that can be transmitted in UL buffer of a UE, so as to support multi-connectivity, and enables macro cell to provide a better coverage of the control plane data and enables small cell to provide larger capacity.