Telefonaktiebolaget Lm Ericsson (publ)

Unwired Planet, LLC

Lenovo Group Limited

Peter Carl Lundh

Szilveszter Nádas

Sándor Rácz

Anders Bjenne

Mats Goran Wilhelmsson

Zoltan Nagy

Lars Blomstergren

Anna Larmo

Ina Widegren

Min Liao

Zoltán Nagy

János Farkas

Patrik Torgny Karlsson

Carola Faronius

Magnus K Almgren

Tarmo Kuningas

Erik Geijer Lundin

Per Konradsson

Rutger Andersson

Roger Wallerius

Clarence Jorn Fransson

Nils Brännström

Peter Andersson

Mats S{dot Over (a)}gfors

Erik O Abefelt

Karl A Bjenne

Zoltan Nagy C

Zoltán Nagy C

Arto Juhani Nummelin

Szilveszter Nàdas

G&ouml;ran Skoog

Bert Hansson

Nádas Szilveszter

Mats SÅGFORS

Ina Birgitta Widegren

The invention relates to a method and device () of controlling bit rate of a terminal () included in a group of terminals. To this end, a method is provided comprising the steps of acquiring a predetermined QoS parameter for the terminal, which parameter stipulates target QoS to be given to the terminal relative to other terminals in the group, and acquiring either one or both of (a) at least one measure of a channel condition of the terminal and (b) at least one capacity measure of the terminal. Further, the method comprises the step of controlling the bit rate of the terminal on the basis of a reference weighting factor created by a combination of the acquired predetermined QoS parameter, the acquired at least one measure of a channel condition of the terminal and/or the acquired at least one capacity measure of the terminal.

Measurement based QoS adaptation

According to an example method performed in a High Speed Downlink Packet Access (HSDPA) environment, a first device generates a High Speed Downlink Shared Channel (HS-DSCH) data frame that includes a plurality of blocks of packet data units. A first block of the plurality of blocks includes packet data units of a first length, and a second block of the plurality of blocks includes packet data units of a different, second length. The first device transfers the HS-DSCH data frame to a second device. The HS-DSCH data frame further includes, for each block of the plurality of blocks, a first information element that indicates a length of the one or more packet data units in the each block, and a second information element that indicates a quantity of packet data units in the each block.

Flexible radio link control packet data unit length

The embodiments of the present invention relate to a method and a RBS to reduce the RNC load. This is achieved by letting the radio base station identify RRC connection requests and performing RRC connection rejects. In this way, excessive load of RRC requests done by typically Smart Phones can be rejected in a good way by the radio base station and therefore free up capacity in RNC, making it possible for RNC to execute useful traffic to a higher degree.

Method and radio base station in a wireless communication network

A method for traffic control in a cellular telephony system (), each cell comprising at least one node, an RBS (), for the control of traffic to and from users () in the cell. The traffic to each UE () can comprise at least one flow, and the method is intended for control of the flows in the traffic to UEs () in the system (), and comprises one control function for each controlled flow to each of said UEs (). Said control function comprises a congestion avoidance function () which detects the presence or absence of congestion in a flow to an UE (), and which, upon congestion or low utilization of the network reduces the bit rate to the UE () in a non-linear fashion, and which, in the absence of congestion, linearly increases the bit rate of the traffic to the UE ().

Method and a system for down link control in a cellular telephony system

A method is disclosed for controlling, according to an additive increase multiplicative decrease (AIMD) principle, the bandwidth sharing among contending traffic flows over a transport network between a radio network controller and a radio base station. According to the method, a relative bit-rate (RBR) is determined () for each traffic flow; and the bit-rates of said traffic flows are controlled () such that additive increase operations of said AIMD principle depend on the respective RBR of each traffic flow. Embodiments of the invention strive at supporting Gold, Silver and Bronze HSDPA and/or EUL bit-rate subscriptions over a single TN QoS class.

HSPA relative bit-rate AIMD-based QoS profiling

A method for detecting congestion in a transport network is provided. The congestion detection utilizes flow control including relative bitrate. The method comprises counting the number of detected frame loss events for a flow. The method further comprises determining if the number of detected frame losses is greater than or equal to a corresponding threshold, wherein the threshold used is an individual threshold for the flow set taking into account relative bitrate weights of the flow, and detecting transport network congestion for the flow when the number of detected frame losses is greater than or equal to the corresponding threshold.

Method of congestion detection in a cellular radio system

A first device () in a High Speed Downlink Packet Access environment () may generate a High Speed Downlink Shared Channel data frame () that includes a group of packet data units, where a first packet data unit of the group of packet data units is of a different length than a second packet data unit of the group of packet data units. The first device () may further transfer the High Speed Downlink Shared Channel data frame () to a second device ().

Flexible Radio Link Control Packet Data Unit length

A mechanism is provided to resolve the Iub transport network congestion efficiently for HSDPA by dynamic adjustment of the transmit window of the RLC. The RLC protocol is extended with congestion control functionality. The Iub TN and Uu congestion detection method in the Node-B signals the congestion to the RNC, and this congestion indication is used by RLC to react on the congestion situation. In the RNC, the transmission window of the RLC is adjusted to control the flow rate. When congestion is detected, the RLC transmission window size is decreased. When there is no congestion, then the RLC transmission window size is increased automatically. Different types of congestion are distinguished and are handled in different ways. Alternatively, congestion control is achieved without any modification in the RLC layer from the existing standard. Here, RLC STATUS PDUs are used to change the RLC transmission window size.

Efficient flow control in a radio network controller (RNC)

The present invention is related to a method, base station (RBS) and computer program for quickly recovering from a detected congestion over the air interface. First the current bitrate at the which the air interface congestion has been detected is stored as a new reference bitrate. Thereafter, the base station (RBS) requests a reduction of the bitrate associated with the air interface. When the congestion condition has subsided the base station (RBS) requests a boost of the bitrate associated with the air interface up to the stored new reference bitrate. When finally the new reference bitrate has been reached, the base station (RBS) requests a linear increase of the bitrate associated with the air interface.

Congestion control in a wireless communication network

The present invention proposes a solution in the area of HSDPA flow control. It proposes an improvement to transport network congestion detection and avoidance. The improvement proposes to use a measurement of incoming bitrate to determine the reduction of bitrate after a transport network congestion event. The advantage is that high bitrate reduction is only used when it is necessary; otherwise only small bitrate reduction is used, which results in small oscillation, and consequently higher transport network utilization.

Method and arrangement in a communication system

A radio base station (RBS) is described herein that detects when a high-speed downlink shared channel (HS-DSCH) data frame () is lost after it was transmitted by a radio network controller (RNC) over a transport link (Iub) towards the RBS (). To accomplish this, the RBS () upon receiving a HS-DSCH data frame () inspects a frame sequence number () located within the received HS-DSCH data frame () to determine if the frame sequence number () is in sequence with a frame sequence number () located within a previously received HS-DSCH data frame (). If the two frame sequence numbers () are not in sequence, then one or more HS-DSCH data frames () that were previously transmitted towards the radio base station () have been lost. If the radio base station () detects to many lost HS-DSCH data frames (), then it can correct the problem by reducing the bit rate of a certain HS user flow or by reducing the maximum bit rate for all of the HS traffic which is going to be sent by the radio network controller () over the transport link () to the radio base station ().

HSDPA flow control data frame, frame sequence number

A network includes a first node and a second node and data frames are transmitted from the first node to the second node. Each of the data frames carry information belonging to one of a plurality of data flows. In a flow control unit () there is an estimate or measure determining unit () for determining for each of the data flows, at the ends of first time periods having a predetermined first length, an estimate of or a measure representing the total number of received data frames that have been faulty during the first time period. A reference calculating unit () is connected to the estimate or measure determining unit for calculating, based on the determined estimate or measure, a bandwidth capacity reference value determining the currently maximum allowable bandwidth for transmission from the data transmitting node to the data receiving node. The first node can be a radio network controller and the second node a radio base station, the data frames forwarded in an HS-DSCH over an Iub interface.

Method and node for determining bandwidth allocations in a radio communication network

A mechanism is provided to resolve the Iub transport network congestion efficiently for HSDPA by dynamic adjustment of the transmit window of the RLC. The RLC protocol is extended with congestion control functionality. The Iub TN and Uu congestion detection method in the Node-B () signals the congestion to the RNC (), and this congestion indication is used by RLC to react on the congestion situation. In the RNC (), the transmission window of the RLC is adjusted to control the flow rate. When congestion is detected, the RLC transmission window size is decreased. When there is no congestion, then the RLC transmission window size is increased automatically. Different types of congestion are distinguished and are handled in different ways. Alternatively, congestion control is achieved without any modification in the RLC layer from the existing standard. Here, RLC STATUS PDUs are used to change the RLC transmission window size.

In one aspect, a method and apparatus are disclosed that can provide an efficient and robust HSDPA flow control solution. The RNC () can receive information regarding allowed data rate from the Node-B () for a data flow in a downlink direction. Based on the received data rate information and optionally based on other predetermined considerations, the RNC () adjusts the RLC PDU transmission window size for the data flow. When the RLC PDU transmission window is properly sized, reaction to congestion can be performed quicker relative to the existing Iub flow control.

Limiting RLC window size in the HSDPA flow control

The invention discloses a method () for traffic control in a cellular telephony system () comprising a number of cells, each cell comprising at least one Radio Base Station, RBS, (). The system () comprises at least one Radio Network Controller, RNC, (), for the control of a number of Radio Base stations. The traffic between an RBS and an RNC comprises a number of flows. The invention is intended for the control of flows from the Radio Base Stations to their RNC. The method uses one control function for each flow from each of said Radio Base Stations, and also comprises a congestion detection function () which detects the presence or absence of congestion in the traffic from an RBS to an RNC, and which, upon detection of congestion reduces the bit rate of the congested traffic, and in the absence of congestion, increases the bit rate of the previously congested traffic.

Growing community of inventors

Farsta, Sweden

Peter Carl Lundh