Abstract:
In its various aspects, the present invention addresses the many challenges associated with making timing measurements involving multifarious radio links. Such measurements are referred to herein as “enhanced” to connote that such timing determinations are being made across multifarious radio links. Here, a radio link will be understood as connecting two radio nodes, and two radio links are considered to be multifarious with respect to each other if they are opposite in terms of uplink and downlink transmit directions, and further if they are associated with different cell identifiers and/or if the two links are between different pairs of radio nodes. In this context, the teachings herein disclose the sharing of “enhanced timing measurement” capability information, e.g., between radio nodes and positioning nodes. Such information indicates the enhanced timing measurement capability of a radio node. Sharing such information enables another node, e.g., a positioning node, to determine an enhanced timing measurement configuration to be used by a radio node. Further, additional teachings herein disclose advantageous configurations for making enhanced timing measurements, and techniques for compensating timing measurements determined from multifarious radio links, e.g., compensating for frequency-dependent propagation time differences.
Abstract:
The present invention relates to a method, a base station and an interface for handover in a wireless communication network. Handover is initiated when the signal quality falls below a predetermined value. Random access serves as an uplink procedure to enable the UE to make handover from a first base station (eNodeB) to a suitable second base station (eNodeB). In the present invention, random access parameters are exchanged between second and first base station before said first base station signals said random access parameters to said user equipment.
Abstract:
Methods and apparatus for scheduling link resources in a wireless communication system are disclosed. In an exemplary method, a first scheduling policy vector, or SPV, is generated, the SPV including scheduling elements that prescribe a probability of use for each of several corresponding quantities of link resources. In some embodiments the link resources are LTE resource blocks. The SPV is transmitted to a mobile terminal for use in determining a quantity of link resource units to be scheduled in at least a first transmission time interval. The SPV may be transmitted along with a scheduling window parameter that specifies a period of applicability for SPV.
Abstract:
A method of supporting frequency-selective repeaters (eNodeRs) in a wireless telecommunication system. A base station (eNodeB) classifies User Equipments (UEs) into two categories or lists of users: a white list containing UEs that may need the assistance of repeaters, and a black list containing UEs that do not need repeater assistance. The eNodeB transmits one of these two lists to the eNodeRs. The eNodeRs do not amplify resource blocks (RBs) scheduled for black list UEs. Each repeater may decide on its own whether to amplify signals for a non-black list UE by measuring signals from the UE and comparing them with predefined criteria.
Abstract:
A method in a user equipment (140) for controlling transmission from the user equipment (140), a method in a first radio network node (110) for selecting one or more radio emission control parameters and a user equipment (140) and a first radio network node (110) configured to perform the methods are provided. The user equipment (140) sends (C001), to the first radio network node (110), one or more parameters associated with supported duplexer arrangement characteristics of the user equipment (140) for a first operating frequency band. The first radio network node (110) selects (C004) said one or more radio emission control parameters based on said one or more parameters associated with said supported duplexer arrangement characteristics of the user equipment (140) for the first operating frequency band. The user equipment (140) receives (C005) and applies (C006) said one or more radio emission control parameters from the first radio network node (110) such as to control transmission from the user equipment (140).
Abstract:
The disclosure relates to a method in a macro base station of a heterogeneous wireless communication system, for reducing uplink interference at a radio base station with restricted wireless access. The uplink interference is caused by a user equipment served by the network node, which has a restricted wireless access to the radio base station. The method comprises receiving (310) measurement reports from user equipments served by the network node, and identifying (320) a user equipment causing uplink interference at the radio base station among the user equipments, based on the received measurement reports. The method also comprises obtaining (330) information relating to a total uplink received interference from the radio base station via the identified user equipment, and adjusting (340) a transmit power, a transmission activity, and/or a scheduling of the identified user equipment based on the obtained information, such that the uplink interference caused by the identified user equipment is reduced.
Abstract:
Methods and apparatuses relating to optimization of radio network resources between user equipments operating in a cell and nodes in a cellular radio communication network are provided. Cross-layer information is read from higher level control plane protocol layer packets being transported, before or during lower level control plane protocol layer procedures being performed between a user equipment and a node or between two nodes. The lower level control plane protocol layer procedures are optimized by using the analyzed control plane information received.
Abstract:
The invention relates to a method of globally balancing the transmit power in a cellular radio system with tight reuse of frequencies, to a central controller node, and to an access point that in combination with conventional power control schemes balances the downlink transmission power on reused frequencies in order to balance co-channel interference in a multi-cell environment. The power balancing scheme dynamically assigns a token to or takes a token away from an individual reused radio channel based on quality of, or based on transmission power in the channel. A token, if taken away from the channel, inhibits conventional power control thereby freezing the transmission power in the channel on its current power level. A token, if assigned or re-assigned to channel, re-assumes conventional power control thereby allowing dynamic variation of the transmission power in the channel in accordance with the conventional power control.
Abstract:
A user equipment, UE, (14) and a radio network node (12) can perform multiple input multiple output, MIMO, communication. The UE determines a precoder (50, 54) used in the radio network node for transmitting signals from multiple transmit antennas to the UE. Based on the determined precoder used, the UE determines receiver parameters (22, 60A, 60B) for receiving MIMO signals from the radio network node, and configures the UE to receive MIMO signals from the radio network node in accordance with the determined receiver parameters. The radio network node may provide information for transmission to the UE indicating the precoder used in the radio network node to permit the UE to determine a receiver configuration for receiving MIMO signals based on the determined precoder used by the radio network node.
Abstract:
Techniques for using user equipment, UE, activity information, e.g., by a network node in a communications network are described. The network node can obtain the UE activity information, i.e., information associated with at least one of transmission activity and reception activity for a UE, and then use the UE activity information to configure a positioning function. Some examples of the positioning function are positioning method selection, measurement configuration and assistance data provisioning, reserving positioning resources, stopping the positioning session, delaying handover of the UE, deciding on a position session organization such as number of parallel measurements to be performed, and estimating an impact on battery lifetime.