摘要:
A method of relocating the header compression context in a packet network which transmits packets having compressed headers. A connection is established between a mobile terminal and a first network entity and context information used with compression and decompression of the headers of the packets is stored at the mobile terminal and the first network entity. The context information updating is stopped in the mobile terminal and in the first network entity and after that, a snapshot of the compression and decompression context information is taken and stored in the first network entity. The connection between the first network entity and the mobile terminal is changed to a connection between the mobile terminal and a second network entity. The context information snapshot stored by the first network entity is transferred to the second network entity to be stored therein as the context information of the second network entity. The stored context information at the mobile terminal and the second network entity is then used for compression and decompression of the headers of the packets.
摘要:
A method of relocating the header compression context in a packet network which transmits packets having compressed headers. A connection is established between a mobile terminal and a first network entity and context information used with compression and decompression of the headers of the packets is stored at the mobile terminal and the first network entity. The context information updating is stopped in the mobile terminal and in the first network entity and after that, a snapshot of the compression and decompression context information is taken and stored in the first network entity. The connection between the first network entity and the mobile terminal is changed to a connection between the mobile terminal and a second network entity. The context information snapshot stored by the first network entity is transferred to the second network entity to be stored therein as the context information of the second network entity. The stored context information at the mobile terminal and the second network entity is then used for compression and decompression of the headers of the packets.
摘要:
A data packet transmission method in a packet-switched telecommunication system. A telecommunication protocol comprises a convergence protocol layer for adapting user data packets to convergence protocol packets and a link layer for transmitting the convergence protocol packets as data units and for acknowledging the transmission. A data packet number is defined for the convergence protocol packets to be transmitted. The convergence protocol packets are transferred to the link layer to be transmitted. A data packet number is defined for the received convergence protocol packets and the received convergence protocol packets are acknowledged to the transmitter. The identification data of any convergence protocol packets lost on the link layer are transmitted to the recipient. The counter value of the recipient is updated to correspond to the counter value of the transmitter, to take into account the lost convergence protocol packets.
摘要:
A method of numbering data packets in a packet-switched telecommunications system which utilizes acknowledged transmission and the telecommunications protocol of which comprises a convergence protocol layer for converting user data packets into convergence protocol packets, and a link layer for transmitting convergence protocol packets as data units and for acknowledging the transmission. A data packet number is defined for the convergence protocol packets to be sent by a counter and the convergence protocol packets to be sent are transmitted to the link layer for transmission without the data packet number. A data packet number is also defined for received convergence protocol packets by means of the counter and an acknowledgement of received convergence protocol packets is transmitted to the transmitter.
摘要:
This invention relates to a communication system comprising a least one user with which presence information is associated, said presence information comprising a plurality of parts, at least one of said parts comprising information identifying an application for which said at least one part is intended; and at least one entity to which presence information associated with said at least one user is provided, said at least one entity having at least one entity application, said at least one entity being arranged to use said information to obtain the at least one part intended for said at least one entity application.
摘要:
The present invention describes a method for selecting a preferable codec mode for a connection between a first communication device (UE1) and a second communication device (UE2), where the devices communicate via a network. An element in the network observes a quality of said connection. The quality is based on a data error level of network resource. Based on the observation the network element judges a preferable operational mode of the codec, from a group of operational modes of the codec. The preferable codec mode is based on the quality level of the connection. In the preferred embodiment, if a Radio Network Controller (RNC) observes congestion by observing Real-Time Protocol (RTP) header information, the RNC judges a lower codec mode for the connection. The lower mode for the connection is judged if there is at least one gap in a sequence of detected packets.
摘要:
The present invention relates to provision of data bearers in a communication system (2) comprising a first node (1) and a second node (4). A message is generated that associates with provision of control of a data bearer between the nodes (1,4), said message being based on a data bearer control protocol. Information that associates with responsibilities regarding a quality of service function of the data bearer is included in the message. The message is then transported between the nodes (1,4). The quality of service function of the data bearer is controlled by a control node (1,16) that has been selected based on said information added in the message.
摘要:
Embodiments of the invention include an apparatus comprising a mapping device configured to establish mapping information for delivery order attributes corresponding to different transmission protocol types, and a detection device configured to detect a transmission protocol type for the transmission of data packets. The apparatus further includes a decision device configured to decide whether said detected protocol type is a predetermined type, and a setting device configured to set, based on the mapping information and the decision result, a delivery order attribute as a parameter for transmission of data packets in a packet data network if the predetermined protocol type is not present.
摘要:
A method for arranging error control of packet-switched data, in which method at least a first part and a second part can be separated from the packets. In the method, errors detected in received data are checked, and conditions are determined for handling errors detected at least in the first and the second part. If an error is detected in a received first part and/or second part, the routine checks whether the conditions allow the first part and/or second part to be transmitted to upper protocol layers. If this is allowed, the first part and/or second part are transmitted to upper protocol layers.
摘要:
The invention relates to a method for transferring information in data transmission flows between a first (MS) and a second communication device (SH), in which method at least one data transmission connection is established between the first (MS) and the second communication device (SH). The data transmission is divided into at least an application layer (AL), a network layer (NL), and a link layer (LL), wherein packets (502, 505, 508) of the data transmission flow formed in the application layer from the information to be transferred, are modified into network layer packets (509) according to the network layer protocol. The network layer packets (509) are transmitted by means of one or more data transmission channels preferably in link layer (LL) packets (506, 510), to which an information part is established to transfer the information to be transmitted, and at least a first (504) and a second header part (MCML) to transmit identification data on the data transmission flow. In the method, at least one header part (MCML) is transmitted after the information part.