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48 results about "Packet schedule" patented technology

System and method for delivering packet data over a multiplicity of communication links

InactiveUS20100061244A1Significant additional infrastructure costManaging congestionError preventionTransmission systemsRouting decisionTelecommunications link
This invention provides a system, method and apparatus for managing congestion on heterogeneous network communication links, the first communication link and second communication link being heterogeneous with respect to each other. The system, method and apparatus including a routing decision module, the routing decision module evaluating a queue of information packets scheduled for transmission across the first communication link to determine whether to generate a command signal to route a portion of information packets over the second communication link. The system, method and apparatus may further include a communication link threshold module, the communication link threshold module storing threshold limit values corresponding to a first communication link technology of the first communication link.
Owner:RPX CLEARINGHOUSE

Optimal link scheduling for multiple links

Methods, apparatus and computer program products are provided for distributing communication packets over multiple concurrent parallel links between a first node and a second node in a communication network based upon link quality information for the links. By utilizing link quality information from the links, the rate at which packets are provided to the links may be made proportional to the quality of the link, and thus, the link's ability to transmit the packet. The rate at which packets are provided to links may be reduced when error rates on a link exceed a specified threshold and eliminated when error rates exceed a higher threshold. Alternatively, timing delays from errors on a link may be used to determine a delay factor for a link and packets scheduled to the links based on the link with the lowest delay. The present invention is particularly useful in High Performance Routing Multilink Transmission Groups.
Owner:IBM CORP

Channel efficiency based packet scheduling for interactive data in cellular networks

The present packet scheduling algorithm gives cellular network operators greater flexibility in adjusting the way resources are allocated among interactive best-effort data users. Best effort data users with different radio link qualities may have different amounts of data delivered to them using the same amount of radio resource. In the context of link adaptation, this characteristic complicates the fairness issue in cellular environments and has a profound impact on the overall system performance. As a result, the present packet scheduling algorithm is capable of allocating radio resource dynamically, not only based on channel conditions, but also to achieve different performance trade-offs among users with different link qualities. According to the algorithm, channel quality is determined for each user, channel efficiency is calculated and the channel efficiency value is used as the primary factor in weighting the delivery of packets to (or from) a given user. In a packet schedule weighting equation, a value of exponent may be varied from negative to positive to give good (or bad) users better service. However, performance of users with bad channel qualities degrades the performance of good channel users in a disproportionate manner. It is shown that it is frequently preferable to favor users with good channel qualities.
Owner:AMERICAN TELEPHONE & TELEGRAPH CO

Method and system for scheduling a transmission of compressible and non-compressible packets

A system and method for controlling the transmission of compressible packets, the method including the steps of: (a) receiving a packet that belongs to a stream; (b) determining a quality of service level of the stream; (c) scheduling a transmission of the packet during at least one time slot in response to the quality of service level, and (d) determining whether to compress the packet to provide a corresponding compressed packet, in response to at least one characteristic of at least one packet scheduled to be transmitted during the at least one time slot.
Owner:ARRIS GROUP

Packet schedule timestamp for a compressed bitstream

ActiveUS7486680B1Unreliable transmissionImprove presentation qualityColor television signals processingData switching by path configurationMultiplexingPacket arrival
A packet schedule timestamp is provided. A schedule information packet includes a packet schedule timestamp that represents the relative timing of data packets in a particular bitstream of a multiplexed transport stream. The schedule information packet further provides information about the timing of packets within a bitstream or multiple bitstreams before actual packet arrivals. Look-ahead processing techniques are provided to improve the efficiency of compressed bitstream storage and delivery, such as program stream to transport stream conversion and statistical multiplexing. The packet schedule information can be inserted into the bitstream it describes for transmission or storage with it. Other features, such as timing reconstruction, are also provided. The packet schedule information can be used to reconstruct the timing of the transport packets to their original state.
Owner:INTELLECTUAL VENTURES I LLC

Communication method and system

Communication method and system for transmitting data partitioned into a plurality of data packets between at least two communication units (CU1, CU2, CU4) using a communication network (N). During temporary interruptions of transmission of data packets via the communication network some of the transmitted data packets are lost. The invention allows to avoid the loss of data packets due to temporary interruptions of the communication network by determining at the sending data processing device, based on information received from the communication network, which data packets are lost or will be lost during transmission due to a temporary interruption of the communication network. The method can be used for data transmission via mobile communication networks and an "Internet". To allow a retrieval of lost data packets, data packets scheduled for transmission can be temporarily stored in a temporary storage devices. Transmission of packets, retransmission and other services needed for data communication can be performed by an appropriately modified TCP / IP protocol set.
Owner:TELEFON AB LM ERICSSON (PUBL)

Micro burst flow oriented congestion sensing and marking method in multi-queue data center environment

The invention discloses a marking method based on explicit congestion notification (ECN) in a multi-queue data center environment, and mainly solves the problem that a traditional ECN cannot sense micro burst flow and cannot adapt to a dynamic network. The method mainly comprises three parts, namely ECN threshold lower bound calculation, threshold base value setting and threshold dynamic adjustment. According to the method, firstly, steady-state analysis is carried out on the generation and transmission process of the micro burst flow in a multi-queue data center environment, the lower bound of an ECN threshold value is solved for each switching queue, and it is guaranteed that a switch queue buffer area can effectively absorb the micro burst flow. Then, based on an ideal Generic Packet Schedule (GPS) model, an ECN threshold lower bound is adjusted, a threshold base value is set for each queue, it is guaranteed that the enqueue rate and the dequeue rate of exchange queues are balanced,finally, an optimization model for queue buffer maximum utilization is established for switch memory resources on the basis of the target of improving the network throughput, and an ECN threshold dynamic adjustment algorithm is provided.
Owner:SOUTHEAST UNIV

Communication system and communication method with association frequency domain repetition and mixed automatic retransmission

The invention discloses a communication system and a communication method provided with combined frequency domain repetition and mixed automatic retransmission. At first, one receiving end receives a communication signal, and makes an analysis treatment to the communication signal to obtain a channel quality estimation message and SINR messages of resource blocks that the communication signal corresponds to, then a modulation code format and retransmission times are determined according to the channel quality estimation message and the SINR messages of the resource blocks, finally a sending end makes a corresponding code modulation as well as combined frequency domain repetition and mixture with corresponding times to the communication signal to be transmitted according to the determined modulation code format and retransmission times, then the communication signal is sent. Thus, the transmission time delay of the air interface can be effectively decreased, the repetition times are jointly optimized based on the requirement of the service quality, the frequency domain resource allocation and the time-domain mixed automatic retransmission can be realized, and the packet schedule based on the quality of the channel can also be supported at the same time.
Owner:SHANGHAI RES CENT FOR WIRELESS COMM

Packet schedule timestamp for a compressed bitstream

A packet schedule timestamp is provided. A schedule information packet includes a packet schedule timestamp that represents the relative timing of data packets in a particular bitstream of a multiplexed transport stream. The schedule information packet further provides information about the timing of packets within a bitstream or multiple bitstreams before actual packet arrivals. Look-ahead processing techniques are provided to improve the efficiency of compressed bitstream storage and delivery, such as program stream to transport stream conversion and statistical multiplexing. The packet schedule information can be inserted into the bitstream it describes for transmission or storage with it. Other features, such as timing reconstruction, are also provided. The packet schedule information can be used to reconstruct the timing of the transport packets to their original state.
Owner:INTELLECTUAL VENTURES I LLC

Apparatus and method for scheduling in a broadband radio communication system

The present invention relates to an apparatus and a method for scheduling multiple bursts containing a collaborative spatial multiplexing (CSM) burst and a non-CSM burst in a broadband radio communication system. The method comprises the steps of packet-scheduling an uplink data packet corresponding to the bandwidth request from a terminal such that the packet is allocated to either the CSM burst or the non-CSM burst, determining a modulation and coding scheme (MCS) level and a transmission power level corresponding to the packet-scheduled uplink data packet using the maximum number of bytes for each MCS level in accordance with the types of the multiple bursts calculated for the terminal, determining a transmission power offset in accordance with the type of the burst to which the packet-scheduled uplink data packet is allocated using the MCS level and the power transmission level determined in the previous step, and generating MAP information for the terminal, containing burst allocation information of the uplink data packet and information of the transmission power offset determined in the previous step.
Owner:WIRELESS ALLIANCE LLC

System, modem, receiver, transmitter and method for improving transmission performance

A system, modem, receiver, transmitter and method for improving transmission performance. A coefficient may be calculated using a received signal. A process may be performed on at least one data packet scheduled for transmission based on the calculated coefficient. The process may improve transmission performance.
Owner:SAMSUNG ELECTRONICS CO LTD

Method and Apparatus for Polling Transmission Status in a Wireless Communication System

A method for polling transmission status in a wireless communications system includes determining whether a buffer of a transmitter contains at least a packet that has been transmitted, has not been discarded, and has not yet been acknowledged when there is no packet scheduled for transmission or retransmission while a polling procedure is triggered and is not prohibited, selecting a packet in order to transmit a poll, and scheduling the selected packet for retransmission.
Owner:INNOVATIVE SONIC

System and method for delivering packet data over a multiplicity of communication links

InactiveUS8976670B2Significant additional infrastructure costManaging congestionError preventionFrequency-division multiplex detailsRouting decisionTelecommunications link
This invention provides a system, method and apparatus for managing congestion on heterogeneous network communication links, the first communication link and second communication link being heterogeneous with respect to each other. The system, method and apparatus including a routing decision module, the routing decision module evaluating a queue of information packets scheduled for transmission across the first communication link to determine whether to generate a command signal to route a portion of information packets over the second communication link. The system, method and apparatus may further include a communication link threshold module, the communication link threshold module storing threshold limit values corresponding to a first communication link technology of the first communication link.
Owner:RPX CLEARINGHOUSE

System And Method For Interference Mitigation In Wireless Networks

A computer-implemented method for scheduling a packet for transmission in a wireless local area network can be used to account for hidden and / or exposed terminals. The method includes determining whether the packet is to be transmitted to a computing device through a wireless access point that is in conflict with at least one other computing device associated with a different access point. The method further includes determining whether there is a conflicting packet scheduled to be transmitted for any conflicting computing devices associated with a different access points and scheduling the packet for transmission based on any conflicting packets. The method yet further includes forwarding the packet to a wireless access point at the scheduled time.
Owner:WISCONSIN ALUMNI RES FOUND

Space division multiple address (SDMA) transmission method and base station in multi-carrier MU multiple input multiple output (MIMO) system

The invention provides a space division multiple address (SDMA) packet schedule method and a base station of a multi-carrier MU multiple input multiple output (MIMO) system. A projected matrix on a combined channel matrix of the other users in the same user group of each user in the user group is calculated, wherein the user group is selected from a plurality of users, a capacity metric of the user group is calculated according to the projected matrix, an optimal user group is selected according the capacity metric of a plurality of user groups. According to the SDMA packet schedule method and the base station of the multi-carrier MU MIMO system, multilingual user interface (MUI) on a terminal user at an emitting end is effectively removed, and calculating complexity is reduced.
Owner:HUAWEI TECH CO LTD

Method and apparatus for compensating for performance degradation of an application session

Disclosed is a method and apparatus for compensating for a performance degradation of an application session in a plurality of application sessions associated with a network link. The performance of each application session in the plurality of application sessions associated with the network link is determined. The performance of each application session in the plurality is then compared. From this comparison, a lowest performance application session in the plurality of application sessions is identified. Corrective action is performed on packets scheduled to be transmitted over the lowest performance application session.
Owner:AMERICAN TELEPHONE & TELEGRAPH CO

Data packet scheduling method and apparatus

The invention discloses a data packet scheduling method and apparatus. The data packet scheduling method is characterized in that the method includes steps: analyzing a first data packet scheduled by a terminal, and obtaining a business time delay requirement; placing the first data packet in a preset cache queue; adding a second data packet scheduled by the terminal to the cache queue before the time corresponding to the business time delay requirement arrives; and obtaining the first data packet and the second data packet from the cache queue and sending the first data packet and the second data packet to the terminal after the time corresponding to the business time delay requirement arrives. According to the method and apparatus, the data packets are not immediately scheduled from the terminal but cached and then scheduled in a centralized manner so that the utilization rate of the network is increased.
Owner:ZTE CORP

Proximity services device-to-device communication services control

The present invention addresses method, apparatus and computer program product for setting up a proximity services device-to-device communication service. Thereby, by a transmitting user equipment, a message including application control information is compiled, a scheduling assignment for scheduling the message transmission is transmitted to a device to be set up, and the message is transmitted to the device according to the scheduling assignment. A receiving user equipment receives a scheduling assignment and at least one of data packets scheduled in the scheduling assignment, determines whether at least one of the received data packets relates to a new proximity services device-to-device communication service traffic flow, determines whether a message including application control information is included in the at least one of the received data packets, and completes the setup based on the application control information.
Owner:NOKIA SOLUTIONS & NETWORKS OY

Network congestion control method

The invention provides a network congestion control method. The method comprises the steps of setting a token bucket in a buffer area before a sending end sends streaming data, sending a credit request to a receiving end, receiving a credit packet sent by the receiving end, increasing the capacity of the token bucket in the buffer area according to the credit packet, and sending data when the sizeof a to-be-sent data packet is smaller than the capacity of the token bucket; enabling the receiving end to receive the credit request sent by the sending end and send a credit packet to the sendingend; receiving a data stream sent by a sending end; and enabling the switch end to selectively discard the credit packets according to the link capacity limit, and perform ECN marking on the credit packets which are not discarded according to the proportion of the discarded credit packets. Compared with the prior art, the technical scheme provided by the invention has the advantages that the credit data packet schedules 1538 tokens instead of one data packet; credit waste during data packet scheduling can be avoided, and the credit rate control mechanism based on the ECN can effectively calculate the credit loss rate compared with credit-based feedback control of ExpresssPass.
Owner:NAT UNIV OF DEFENSE TECH

Fast synchronization of compressor state and decompression state in marginal wireless coverage

A compressor may obtain information indicative of a transmit delay representative of a time duration that elapses between creation (e.g. by the compressor) of a packet and the transmission of the packet, e.g. over a wireless link. The transmit delay may be determined based at least on information indicative of the uplink capacity of the cellular network. The uplink capacity may be determined / obtained based on the uplink throughput and uplink power headroom. When the compressor receives a negative acknowledgement transmission / packet from the de-compressor, if the transmit delay is not greater than a specified threshold value, the compressor may process the received negative acknowledgement packet. If the transmit delay is greater than the specified threshold value, the compressor may firstdiscard the buffered compressed packet scheduled to be transmitted next to the de-compressor, and transmit an initialization and refresh (IR) or IR dynamic packet to the de-compressor instead.
Owner:APPLE INC

Systems and methods for detecting motion using wireless communication signals

Embodiments described herein provide a method for detecting motion. At a first wireless communication device capable of wirelessly communicating with a second wireless communication device, channel state information (CSI) for the wireless channel between the first and second wireless communication devices is received. A nulling matrix is calculated based on the received CSI. The calculated nulling matrix is applied to a plurality of short packets scheduled to be periodically transmitted from the first wireless communication device to the second wireless communication device. The first wireless communication device receives, from the second wireless communication device, received signal strength information (RSSI) determined for each of the transmitted plurality of short packets. The method further includes detecting motion based on detecting a change in the RSSI received from the second wireless communication device.
Owner:MARVELL ASIA PTE LTD

Scheduling method and device based on cut-through technology

The embodiment of the invention provides a scheduling method and device based on a cut-through technology. In the embodiment of the invention, a current time mark is compared with a pre-estimation time mark of pre-estimation time carried in packet description when detection indicates that a data packet corresponding to the packet description is not completely stored in a storage of equipment based on a cut-through technology, and the equipment starts to schedule the data packet corresponding to the packet description when the current time marker is greater than or equal to the pre-estimation time marker, so that scheduling is started while the data packet is stored; the transmission time of the data packet from input equipment to output equipment is shortened; and the communication quality is improved. Moreover, the precondition for the equipment to schedule the data packet is that the current time marker is greater than or equal to the pre-estimation time marker, so that the integrity of the data packet scheduled by the equipment is ensured, and effective scheduling of the data packet by the equipment is realized.
Owner:XFUSION DIGITAL TECH CO LTD

Method and apparatus for compensating for performance degradation of an application session

Disclosed is a method and apparatus for compensating for a performance degradation of an application session in a plurality of application sessions associated with a network link. The performance of each application session in the plurality of application sessions associated with the network link is determined. The performance of each application session in the plurality is then compared. From this comparison, a lowest performance application session in the plurality of application sessions is identified. Corrective action is performed on packets scheduled to be transmitted over the lowest performance application session.
Owner:AMERICAN TELEPHONE & TELEGRAPH CO

Data transmission method, system and transmitting terminal

The embodiment of the invention discloses a method for transmitting data, comprising the following steps: when a sender schedules data packets again for a receiver, if the last sent data packet is determined to be discarded when former data packets schedule is carried out, the maximum value of sending sequence numbers TSN corresponding to the non-discarded data packets before the last data packet is further determined when former data packets schedule is carried out, TSN is set for the data packets that are scheduled again by adding 1 to the maximum value. The embodiment of the invention also discloses a data transmission system and a sender, and the sender comprises a sender MAC layer processing unit and a sender RLC layer processing unit. By adopting the method, the system and the sender disclosed by the embodiment of the invention, time delay of data transformation can be reduced.
Owner:TD TECH COMM TECH LTD

GEO satellite-borne CICQ structure switch packet schedule algorithm considering channel state

The invention discloses a GEO satellite-borne CICQ structure switch packet schedule algorithm considering channel states. To make a switch work in a work-conserving state or work in the maximum work-conversing state and also to increase a channel utilization rate, the algorithm enables output ports of normal channel states to gain the most matching numbers while ensuring that the maximum matching number keeps unchanged, increases a passing rate and reduces average time delays of packets. A comparison of simulation result shows that for a GEO satellite-borne CICQ switch with one packet as cross cache capacity, the algorithm is superior to conventional mainstream algorithms in terms of the passing rate and packet average time delays in various common satellite channel states, and has great practical values for a GEO high-performance satellite-borne CICQ switch.
Owner:BEIHANG UNIV

Virtual node scheduling method and system for network simulation platform vlan interconnection

The invention discloses a virtual node scheduling method and system for VLAN interconnection of a network simulation platform. The present invention first counts the sum of the resources requested to start the virtual nodes, and if there is a single physical host that can accommodate all virtual nodes, then it is scheduled to this physical host; otherwise, the total number of virtual nodes is selected to use the small topology map scheduling method or the large topology map scheduling method ; In the small-scale topology map scheduling method, the scheduling result with the fewest VLANs is obtained through the calculation method of conditional traversal. In the large-scale topology map scheduling method, the group scheduling method centered on key nodes is used to minimize the newly added VLANs during each group scheduling. . Multiple topology diagrams started at the same time can be combined and processed to achieve the least occupied VLAN. The invention solves the problem of reasonable utilization of VLAN resources on a multi-host network simulation platform, makes the distribution of the entire topology map on the physical host more compact, and the calculation process is simplified and intuitive.
Owner:南京赛宁信息技术有限公司
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