Abstract:
A method and apparatus according to the present invention addresses and/or prevents lost protocol synchronization in HARQ systems caused by ACK/NACK errors. One embodiment detects lost synchronization errors for NDI-based retransmission protocols and restores synchronization by sending an explicit RESET message. In response to the RESET message, the transmitter aborts the transmission of a current PDU and transmits a new PDU and corresponding NDI. Another embodiment prevents protocol synchronization errors by sending scheduling grants on a packet by packet basis. The receiver sends a subsequent explicit scheduling grant to the transmitter based on an error evaluation of a received PDU. The transmitter will not send the next PDU unless it receives the subsequent explicit scheduling grant.
Abstract:
A method in a transmitter for transmitting a transport format indication from a transmitter to a receiver (505) where each value of the transport format indication identifies at least two transport block sizes. Hereby a more flexible use of different transport block sizes is enabled.
Abstract:
The object of the present invention is to provide a mechanism for improving RACH performance. The object is achieved by a method in a user equipment (140) for random accessing the user equipment (140) to a base station (120). The user equipment (140) and the base station (120) are comprised in a communication network system (110). An acknowledgement to send a message to the network node (110,120) is received (203,301) from a network node (110,120) comprised in the communication network system (100). The user equipment then sends (204,302) the message to the network node (110,120) using Hybrid Automatic Retransmission reQuest HARQ being in a CELL_FACH state.
Abstract:
The present invention relates to a node and a method thereof for a mobile telecommunication network connectable to a controlling node and wirelessly connectable to mobile terminals. The node is adapted to have an uplink connection to a mobile terminal, wherein the mobile terminal is adapted to have a second uplink connection to at least a second node such that data transmitted from the mobile terminal may be received at the node and at the at least the second node. The node comprises means for estimating whether data transmitted from the mobile terminal received at the at least the second node is received stronger than the data received at said node and means for discarding data received from the mobile terminal if it is estimated that the data is received stronger at the at least the second node than the data received at said node.
Abstract:
In a method of improved media frame transmission in a communication network. Initially a plurality of "original" or regular media frames are provided for transmission. According to the invention, robust representations of the provided regular media frames are generated and stored locally. Subsequently, one or more of the regular media frames is/ are transmitted. The invention detects an indication of a loss of a transmitted media frame, and the idea is to transmit, in response to a detected frame loss, a stored robust representation of the lost media frame and/ or a stored robust representation of a subsequent, not yet transmitted, media frame to increase the media quality.
Abstract:
A method and nodes for providing adaptive segmentation in a higher protocol layer interacting with a lower protocol layer. An adaptable segmentation limit (200, 204), defining a threshold of a largest Protocol Data Unit (PDU) that is to be submitted to a lower protocol layer, is deployed at a higher protocol layer interacting with the lower protocol layer. For each Service Data Unit (SDU; 201, 203) arriving at the higher protocol layer, it is determined if the respective SDU can fit into the segmentation limit or not. Each SDU that do not fit into the segmentation limit is segmented into PDUs (205, 206) which are smaller than or equal to the segmentation limit, while no segmentation is performed on SDUs that fit into the segmentation limit.
Abstract:
Un método para manejar temporizadores para procesamiento de control de errores en un sistema decomunicación inalámbrico, caracterizado porque el método comprende:señalizar (710) a un controlador de acceso al medio que son necesarios recursos de enlace para transmitir datos;recibir (720) una indicación desde el controlador de acceso a medio que están disponibles recursos de enlacepara transmitir los datos;sensible a la indicación, generar (730) un mensaje de control de errores en base a un estado de control deerrores actual, reenviar (740) el mensaje de control de errores al controlador de acceso al medio para latransmisión, e iniciar (760) un temporizador de control de errores, y prevenir que un mensaje de control deerrores adicional sea generado antes de que el temporizador de control de errores expire.
Abstract:
The present invention relates to transmission and retransmission of packet data in a communications system, where the communications system uses rate switching or channel switching. It provides an interface for information exchange between radio resource management and one or more transport protocol entities in a cellular mobile radio system, particularly a Universal Mobile Telecommunications System, UMTS, or WCDMA system.
Abstract:
Un método de control del volumen de tráfico del plano de usuario en la interfaz Iub o Iub/Iur entre un Controlador de Red Radio y un Nodo B de una Red de Acceso Radio UMTS durante los periodos de sobrecarga, el método que comprende, para las conexiones de enlace ascendente y del enlace descendente individuales establecidas sobre la interfaz Iub o Iub/Iur, monitorizar en el Controlador de Red Radio la llegada tardía de tramas que transportan datos del plano de usuario en el Controlador de Red Radio o en el Nodo B transmitidos sobre la interfaz Iub o Iub/Iur, y en base a los resultados de dicha monitorización, provocar una reducción en la carga Iub o Iub/Iur para una conexión cuando sea apropiado, caracterizado porque el paso de monitorizar la llegada tardía de tramas comprende analizar los resultados proporcionados por una entidad de Protocolo de Trama que incluye, para la dirección de enlace descendente, derivar dichos resultados contando el número de tramas de Ajuste de Temporización recibidas en el Controlador de Red Radio desde el NodoB y, para la dirección del enlace ascendente, derivar dichos resultados directamente contando el número de tramas basadas en llegada tardía en el Controlador de Red Radio, y comparar el valor de cuenta con algún valor umbral.
Abstract:
A method and a system for balancing load between at least two groups of dedicated uplink channels in a telecommunication network serving a plurality of user equipments ( 18 ), wherein scheduling requests received from the user equipments ( 18 ) and scheduling grants issued to said user equipments ( 18 ) are measured. Thereafter, a measurement report based on the measured scheduling requests and the measured scheduling grants is derived, which is forwarded to a radio network unit ( 10 ) controlling radio network resources, whereby a re-distribution of available radio resources is made between the at least two groups of dedicated uplinks channels.