Telefonaktiebolaget Lm Ericsson (publ)

Dalibor Turina

Ulrik Wahlberg

Farooq Khan

Tomas Hedberg

Bengt Y Persson

Per Johan Beming

Magnus K Almgren

Magnus C Frodigh

H&aring;kan Gunnar Olofsson

Christer Johansson

Lars Axel Billstrom

Stefan Ström

Zsolt Haraszti

Niclas Lindberg

Magnus Lorentz Hartman

Lars Billström

Magnus Hartman

In a multi-access environment, applications with high priority can temporarily, when needed, occupy parts or even complete resources from at least one of the accesses in a certain geographical area radio access can be secured for such applications. An area consisting of a number of cells is created In such an area, an application having high priority can have guaranteed resources on one pre-determined access while other 'ordinary' traffic is temporarily directed to the other access(es) even if that may result in a lower Quality of Service (QoS) in that particular area.

Method of handling radio access and to prioritize subscribers in case of an emergency

The present invention concerns a process in a radio communication system which is arranged for packet data transmission according to a message-synchronized ALOHA protocol with reservation. Mobile stations in the system are arranged to send access requests to a base station during a reservation phase in a mobile radio system which uses this protocol. The base station is arranged to receive and comply with the access request from a first mobile station by sending thereto a channel reservation message () comprising a channel reservation (). The base station is further arranged to receive access requests from at least a second mobile station for which channel reservation momentarily cannot be carried out. According to the process of the invention an access request received from the second mobile station is confirmed when channel reservation cannot be carried out in the usual manner. The confirmation is sent in the form of an access confirmation () which is included in the same channel reservation message () as the channel reservation () for the first mobile station.

Method and arrangement in a radio communication system

Idle mobile stations are steered to a particular cell or service area to accommodate subscriber preferences or restrictions, subscription services, or network operator preferences or restrictions and/or to accomplish load redistribution or other network management functions. Multiple idle mobile station steering factors are considered. Steering may be accomplished using a variety of techniques such as rejecting registration attempts in certain cells and accepting those attempts in others and adjusting cell broadcast parameters.

Method and apparatus for steering idle mobile stations

Load redistribution and other benefits may be achieved by dynamically distributing or 'steering' idle mobile stations to a particular cell or area. For example, idle mobile stations may be steered from a loaded cell to less loaded cells by changing one or more cell broadcast parameters.

A method and an apparatus for providing radio access bearer services for different applications in a network having a core network and a radio access network through radio access bearers between the networks are presented. One or more session traffic flows being sent by an application are identified, the identified session is characterized in the form of parameters needed for the determination of the one or more radio access bearers. The characterized parameters are converted into radio access bearer attributes. One or more radio access bearers defined by the attributes are requested and established. Each session is mapped onto a correct radio access bearer established upon receiving the request. The one or more radio access bearers are released when no longer needed.

Method and apparatus for providing radio access bearer services

A packet data communication system uses an USF (Uplink State Flag) transmitted on the downlink and interleaved with downlink data, to schedule traffic on the uplink for one or several mobile users utilizing the same physical channel. The USF indication is made variable and defined in the control signaling at setup of a packet transmission. An USF indicates to a mobile that one or several consecutive radio blocks is reserved for uplink transmission from a specific mobile. The mobile does not have to receive the USF during the remaining period defined by the number of radio blocks scheduled. The solution is especially advantageous in combination with adaptive antennas when all radio blocks on the downlink transmissions do not have to be broadcast to all users on a certain channel.

Method for variable block scheduling indication by an uplink state flag in a packet data communication system

A radiocommunication system supports high throughput rates over an air interface. An access network interface, e.g., between a base station and base station controller, conveys information between the base station and the rest of the terrestrial system. Techniques are provided to adjust transmission rates over the air interface based on loading of the access network. Techniques are also provided to control bandwidth allocation over the access network interface and distribute call blocking/delay percentages when there is an imbalance between the capacity of the air interface and the access network interface.

Methods and systems for mode selection based on access network capacity

A communications system is provided that uses a multiple access packet reservation type of protocol. The physical channels required for the packet transfers are specially allocated to one mobile station (referred to as a 'VIP MS'). The VIP MS has the exclusive priority to use these allocated physical channels for packet data as needed. Consequently, the VIP MS always has the negotiated bandwidth available for the packet transfers. Furthermore, since the VIP MS is given the highest exclusive priority to access these physical channels ('VIP priority'), by allocating a reserved random access channel dedicated to the VIP MS (e.g., on one allocated uplink channel), the variable random access delays experienced by prior systems no longer exist Since the VIP MS is always scheduled first for transmissions on the downlink, and reserved access is provided for the VIP MS on the uplink, only a constant delay period for the uplink and downlink is involved. In other words, the VIP MS is guaranteed both a bandwidth for the packet transfers and a constant uplink and downlink delay.

Method and apparatus for improving performance of a packet

The present invention relates to a method and an arrangement for channel allocation in a radio communication system in which data is transmitted between two stations over two or more radio channels. Data is communicated as packets which are divided into blocks while the transmission follows a protocol for automatic re-transmission of data that have been erroneously transmitted. In accordance with the proposed method, channels for re-transmission are allocated with respect to a transmission parameter which has been created at a previous transmission and which is based upon information of the result of said previous transmission. The transmission parameter is aimed to ensure that re-transmission is performed via those channels which have the highest probability of transmitting data correctly. The channels which had the highest transmission quality in said previous transmission are expected to have the highest transmission quality also by re-transmission.

Method and arrangement for channel allocation in a radio communications

Automatic repeat request (ARQ) functionality in a cellular mobile packet data communication system using a reservation slotted-ALOHA protocol is provided by assigning a temporary frame identity (TFI) to each data frame transmitted to or from a mobile station. The assigned TFI is unique among concurrent frame transfer sequences in a cell, and may be assigned based on information in a data frame sent to the mobile station or based on information in a channel reservation message that precedes the data frame sent to the mobile station. The TFI may also be assigned based on information in a channel reservation message that precedes a data frame sent from the mobile station, and the TFI assigned is unique among concurrent frame transfer sequences in a cell. The TFI is included in every block belonging to a particular frame, a block being the unit of data on which ARQ is based. A partial data frame to be retransmitted in case of a transmission error contains only the blocks determined by the ARQ protocol type (e.g., selective or Go-back-N) used, whereby a primary block need not be added to identify the mobile station. Blocks belonging to frames destined for different mobile stations can be multiplexed on the downlink based on the TFI. The mobile station may include, in its random access request, an indication that a TFI is already assigned.

Growing community of inventors

Täby, Sweden

Dalibor Turina