摘要:
This document discloses solutions for using a mix of reference signal types in a wireless communications network, e.g., a first type and a second type, in making positioning-related measurements. In one example, a UE uses a “mix” of CRS and PRS. As an example case, a UE receives PRS and, possibly, CRS from one or more cells, while it receives only CRS from one or more other cells. In this case, the UE determines, e.g., received signal timing values for CRS as received from some cells, on a per-cell basis, and for PRS as received from other cells, on a per-cell basis. The UE can measure and report on per-signal/per-cell basis and can perform calculations involving a mix of timing measurements made for both CRS and PRS. In a further aspect, reference signal transmissions are controlled or coordinated on a per-port basis in cells that use multiple antenna ports for transmitting within each such cell.
摘要:
This document discloses solutions for using a mix of reference signal types in a wireless communications network, e.g., a first type and a second type, in making positioning-related measurements. In one example, a UE uses a “mix” of CRS and PRS. As an example case, a UE receives PRS and, possibly, CRS from one or more cells, while it receives only CRS from one or more other cells. In this case, the UE determines, e.g., received signal timing values for CRS as received from some cells, on a per-cell basis, and for PRS as received from other cells, on a per-cell basis. The UE can measure and report on per-signal/per-cell basis and can perform calculations involving a mix of timing measurements made for both CRS and PRS. In a further aspect, reference signal transmissions are controlled or coordinated on a per-port basis in cells that use multiple antenna ports for transmitting within each such cell.
摘要:
Methods and nodes for coordinating uplink transmissions in a victim cell and in an aggressor cell. The uplink transmissions in the aggressor cell potentially cause interference at a victim radio node receiving or measuring uplink signals transmitted in the victim cell. A coordinating node obtains (200) an indication of an uplink pattern of interference-protected resources in frequency and time where uplink transmissions are allowed to be scheduled in the victim cell but not in the aggressor cell. The coordinating node then signals (202) the indication to an aggressor radio node serving the aggressor cell and/or to the victim radio node. When a radio node receives (204) the signaled indication, it uses (206) the uplink pattern for scheduling uplink transmissions in one or both of the victim cell and the aggressor cell, or for configuring a measurement or signal reception. The coordinating node may be the victim radio node (302), or the aggressor radio node (300), or a network node (304) signalling the indication to one or both of the victim radio node and the aggressor radio node.
摘要:
The present invention relates to methods and apparatus in a RBS and a UE for reference signal (RS) measurements in an OFDM system, that enable having a configurable RS transmission bandwidth which is smaller than the system bandwidth. This allows for better interference coordination of RS, which in turn improves the UE RS measurements used for different services such as positioning. The RBS retrieves the RS transmission bandwidth, determines a RS measurement bandwidth based on this RS transmission bandwidth, and transmits the determined bandwidth to the UE. The UE receives the RS measurement bandwidth and measures the RS in a bandwidth determined based on the received measurement bandwidth and the UE capability.
摘要:
A method in a first network node (105) for estimating a first timing offset difference between a first timing offset of a first base station and a second timing offset of a second base station, is provided. The first network node (105) receives Uplink Time Difference Of Arrival, UTDOA, measurements. The UTDOA measurements relate to a first UTDOA time difference. The first network node (105) further receives Observed Time Difference Of Arrival, OTDOA, measurements. The OTDOA measurements relate to a first measured OTDOA time difference. The first network node estimates a first timing offset difference between a first timing offset of the first base station and a second timing offset of the second base station based on the first UTDOA time difference and the first measured OTDOA time difference.
摘要:
A method is disclosed for using cell load coupling (CLC) to manage a radio communications network (RCN), comprising cells and radio network nodes associated with the cells. The method comprises determining a CLC characteristic between a first and second of the cells. The determining is based on a cell load contribution that is dependent on a measure of: a signal received by a receiving node of the first cell from a transmitting node of the first cell, a signal received by the receiving node from a transmitting node of the second cell, and traffic between the receiving node and the transmitting node of the first cell. One or more network management functions may be performed on the RCN based on the determined CLC characteristics. The method and/or the functions may be implemented by a computer program, a wireless communications device or a network node.
摘要:
A wireless communications network is described herein in which positioning measurements (e.g., inter-frequency OTDOA measurements and inter-frequency E-CID measurements) may be performed on different frequencies and measurement gaps may be requested for such measurements. In one embodiment, a radio network node (e.g., eNodeB, responsible node) is described for configuring a measurement gap for positioning to be used by a user equipment (UE).
摘要:
The embodiments herein relate to a method in a positioning node (1005) for handling measurements in a communications network (1000). The positioning node (1005) acquires information about a set of carrier frequencies. The information comprises information about at least a channel number and a bandwidth for each respective carrier frequencies in the set. The positioning node (1005) selects at least one carrier frequency based on the acquired information. The positioning node (1005) sends information about the selected at least one carrier frequency to a network node (101) or a target node (1003). The information further comprises at least a channel number and a bandwidth for the selected carrier frequency, enabling the first node (1001) to perform measurements for a target node (1003) using the selected carrier frequency.
摘要:
According to a particular embodiment, a method in a macro base station of a heterogeneous wireless communication system, includes 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 measurement reports from user equipments served by the network node, and identifying 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 information relating to a total uplink received interference from the radio base station via the identified user equipment, and adjusting 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.
摘要:
The present invention relates to a method in a network node of a wireless communication system, for configuring a pattern for a reduced transmission activity. The pattern may e.g. be a positioning reference signal muting pattern used for improving PRS reception quality of a UE. The method comprises obtaining (610) information relating to radio characteristics for a cell, and determining (620) the pattern for the reduced transmission activity in the cell based on the obtained information. The method also comprises applying (630) the determined pattern for the reduced transmission activity.