47 results about "Packet schedule" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.