Patent application number | Description | Published |
20090215462 | Flow Control In UMTS - 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 ( | 08-27-2009 |
20100062777 | Method and A System for Down Link Control in a Cellular Telephony System - A method for traffic control in a cellular telephony system ( | 03-11-2010 |
20100097930 | RNC Capacity Licensing - A method of controlling the rate of traffic flow through an Iub interface of a Radio Network Controller is described. The method includes obtaining a licensed rate, which defines the maximum throughput permitted through the Iub interface, at the Radio Network Controller. The rate of traffic flow through the Iub interface and all Iu interfaces of the Radio Network Controller is measured, and the extent to which packet switched traffic flow through the Iub interface exceeds the licensed rate identified. If the packet switched traffic flow through the Iub interface exceeds the licensed rate, packets are dropped from traffic flow through the Iub interface to reduce the traffic flow to the licensed rate. | 04-22-2010 |
20110044168 | TRANSPORT NETWORK CONGESTION CONTROL FOR ENHANCED UPLINK COMMUNICATIONS - For a mobile radio connection having at least two uplink flows, a determination is made whether one of the uplink flows from a non-serving cell has a better radio link quality than another of the uplink flows from a serving cell. A congestion condition in the radio access transport network is monitored for those uplink flows. If congestion in the radio access transport network for the non-serving cell uplink flow is detected when that uplink flow is associated with the better radio link quality, then a message is generated for transmission to the mobile radio terminal to reduce a rate at which the mobile radio terminal transmits data for the connection to the radio access transport network rather than the non-serving cell discarding uplink data packets. | 02-24-2011 |
20110164500 | Congestion Control in a Wireless Communication Network - 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. | 07-07-2011 |
20110235519 | DELAYED FLOW CONTROL ACTION IN TRANSPORT NETWORK LAYER WCDMA COMMUNICATIONS - Congestion is detected in a radio access transport network that includes radio network controllers and base stations. Data packet flows associated with mobile radio communications are controlled in the radio access transport network by a corresponding flow control entity. Each flow is monitored for congestion in the transport network. A flow control action is determined in response to the detected congestion. Performance of the flow control action is delayed for a predetermined delay period before the flow control action may be performed. Delaying flow control action after congestion is detected allows other affected flows to detect or be notified of the congestion, thereby making congestion detection more fair. | 09-29-2011 |
20110235528 | FAIR CONGESTION DETECTION FOR TRANSPORT NETWORK LAYER WCDMA COMMUNICATIONS - Congestion is detected in a radio access transport network including one or more radio network controllers each coupled to one or more radio base stations. Multiple data packet flows are each associated with a mobile radio terminal communication, and each flow is controlled in the radio access transport network by a corresponding flow control entity. They are monitored for congestion in the transport network. If a congestion area in the transport network is detected for one of the monitored data packet flows, then a determination is made whether other monitored data packet flows share the detected congestion area. Congestion notification information is communicated to the flow control entities corresponding to the other monitored data packet flows that share the detected congestion area. Based on the congestion notification information, the informed flow control entities may take a flow control action, e.g., to enable fair sharing of communications resources in the transport network. | 09-29-2011 |
20120188957 | FLOW CONTROL IN UMTS USING INFORMATION IN UBS FIELD - Each of a plurality of data frames transmitted from a first node to a second node carry information belonging to one of a plurality of data flows. A determining unit determines at periodically repeated times, for each of the data flows, whether there are more data frames in the first node waiting to be transmitted. A capacity allocating unit allocates for each of those data flows for which no data frames have been waiting to be transmitted for a predetermined time period only a small amount of the totally available bandwidth for transmission from the first node to the second node. It also allocates for each of the remaining data flows a share of the rest of the totally available bandwidth such that the sum of the shares for all said remaining data flows is equal to the rest. | 07-26-2012 |
20120320746 | Method and Apparatus for Grant-Based Uplink Transmission Scheduling - In one aspect, the present invention advantageously provides far greater granularity in adjusting the maximum (schedulable) uplink bit rates of users than is directly available from a defined grant table that is used for making scheduled uplink grants to those users. As a non-limiting example, the EUL scheduler in a NodeB in a WCDMA network calculates the “effective” bit rate desired for one or more users over a given time interval, and determines the pattern of scheduling grants to make from the grant table over that interval, to produce the desired effective bit rate(s). This capability enables the EUL scheduler to make relatively fine fractional adjustments to the aggregate uplink data rate for a plurality of users, thus allowing much more precise reductions in the aggregate uplink data rate of those users. The EUL scheduler makes these more precise adjustments, for example, in response to indications of congestion on the backhaul connection between the NodeB and its supporting RNC. Grant variations also may be used in the HARQ processes of one or more users, for obtaining better bit rate control granularity. | 12-20-2012 |
20130058211 | Method of Congestion Detection in a Cellular Radio System - 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. | 03-07-2013 |
20130148499 | Efficient Flow Control in a Radio Network Controller (RNC) - 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. | 06-13-2013 |
20130315063 | METHOD AND DEVICE FOR CONGESTION SITUATIONS - A Radio Network Controller, an RNC ( | 11-28-2013 |