摘要:
The present invention relates to a method for determining link adaptation parameters for a wireless device. The method is performed in a first radio network node of a wireless communication system. The first radio network node hosts a first cell serving the wireless device. The wireless device is interfered by a second cell. The method comprises predicting (410) a future position of the wireless device. The method also comprises estimating (420) a first radio channel quality value for the wireless device in the predicted future position, based on: pathloss values related to the wireless device in the predicted future position for the first and the second cell respectively; and a transmission power of the second cell. The method further comprises determining (430) link adaptation parameters for the scheduling of the wireless device in the future position using the estimated first radio channel quality value.
摘要:
The present invention discloses schemes to perform load control taking uplink BLER statistics into account. An uplink load control method and apparatus are provided in a wireless communication system. The uplink load control method comprises estimating uplink load budget in a cell of the wireless communication system; determining whether the cell is over-loaded based on Block Error Rate (BLER) statistics of non-Guarded Bit Rate (non-GBR) users in the cell and/or Fast Congestion Control (FCC) action statistics in the cell; decreasing the uplink load budget if it is determined that the cell is over-loaded; and increasing the uplink load budget if it is determined that the cell is not over-loaded. Preferably, increasing or decreasing of the uplink load budget is based on the BLER stastics BLERstatistic of targeted users by FCC. By means of the BLER and FCC status, BLER of EUL users can be controlled in an acceptable range while maximizing the benefit of FCC in improving load utilization and consequently uplink throughput as much as possible. On the other hand, the uplink load control method can further comprises adjusting a RoT target RoTtgt, based on BLER statistics of Guarded Bit Rate (GBR) users in order to increase load headroom available for non-GBR users in appropriate conditions without violating the performance of GBR users.
摘要:
The present application discloses a method for mitigating inter-cell interference (ICI) by scheduling user equipments. The method comprises estimating inter-cell interference tolerance of each of at least one neighboring cell during uplink transmission of the user equipment; and coordinating uplink scheduling of the user equipment in accordance with the inter-cell interference tolerance. The present application also discloses a base station, a radio network controller and relevant signaling for mitigating inter-cell interference (ICI) by scheduling user equipments.
摘要:
The embodiments relate to a method and a controlling unit for resource allocation and joint transmission in a cellular communication network. The method includes allocating a first set of frequency resources for transmitting a first set of time slots of data in a subframe, from a first communication node to a User Equipment, UE, and allocating at least one second set of frequency resources for transmitting, at least one second set of time slots of data in the subframe, from at least one second communication node respectively to the UE. The first set of frequency resources is intersected with one of the at least one second set of frequency resources, and union of the first set of time slots of data and the at least one second set of time slots of data is equal to the subframe.
摘要:
In deployments where there is a mixture of new Node Bs capable of uplink multi-antenna transmission and legacy Node Bs not capable of uplink multi-antenna transmission some embodiments described herein enable a network node (e.g. a radio network controller, RNC) to configure an uplink control channel (e.g. dedicated physical control channel, DPCCH) to be decodable by both the new and the legacy Node 8s when the UE operates in uplink multi-antenna transmission.
摘要:
The present invention relates to a method in a first User Equipment (UE) served by a radio base station (RBS) of a wireless network, for uplink power control at Multiple User Multiple-Input-Multiple-Output (MU-MIMO) scheduling. The method comprises obtaining a power adaptation parameter for use in uplink transmission power control when the first UE is scheduled to be in pair with a second UE, or is scheduled to be de-paired from the second UE. The method also comprises receiving an indication from the radio base station to use the obtained power adaptation parameter in uplink transmission power control, and adapting an uplink transmission power based on the obtained power adaptation parameter and the received indication. The present invention also relates to the corresponding method in the RBS, and to the UE and the RBS.
摘要:
The disclosure relates to methods and apparatuses that allow for channelization code allocation adapted for uplink MIMO transmissions. A method for use in a user equipment of a telecommunication system comprises spreading data symbols of a plurality of streams to be transmitted from the user equipment as MIMO transmissions. The step of spreading the data symbols comprises allocating, for each stream, at least one channelization code (62) to be applied for spreading the data symbols of the stream. The plurality of streams are allocated channelization codes (62) from a predefined code tree (61) of applicable channelization codes such that any channelization code (62) is allocated to more than one stream only if there is no applicable channelization code left in the code tree (61) which currently is not allocated for any stream. The channelization code allocation scheme makes it possible to avoid inter-stream interference in many scenarios of uplink MIMO transmissions.
摘要:
The embodiments herein relate to a method in a base station for adjusting transmission power in a communications network. The base station determines a first number m; P of historical transmit power control, TPC, commands based on a signal power and an interference level. The base station determines a second number 2k; n+Q of current TPC commands based on the first number m; P of historical TPC commands, or based on the first number m; P of historical TPC commands and a third number n−K of signal power and interference level pairs. The base station transmits a sequence of TPC commands comprising the first number of historical TPC commands and the second number of current TPC commands to the user equipment to adjust the user equipment's transmission power.
摘要:
The present invention discloses schemes to perform load control taking uplink BLER statistics into account. An uplink load control method and apparatus are provided in a wireless communication system. The uplink load control method comprises estimating uplink load budget in a cell of the wireless communication system; determining whether the cell is over-loaded based on Block Error Rate (BLER) statistics of non-Guarded Bit Rate (non-GBR) users in the cell and/or Fast Congestion Control (FCC) action statistics in the cell; decreasing the uplink load budget if it is determined that the cell is over-loaded; and increasing the uplink load budget if it is determined that the cell is not over-loaded. Preferably, increasing or decreasing of the uplink load budget is based on the BLER stastics BLERstatistic of targeted users by FCC. By means of the BLER and FCC status, BLER of EUL users can be controlled in an acceptable range while maximizing the benefit of FCC in improving load utilization and consequently uplink throughput as much as possible. On the other hand, the uplink load control method can further comprises adjusting a RoT target RoTtgt, based on BLER statistics of Guarded Bit Rate (GBR) users in order to increase load headroom available for non-GBR users in appropriate conditions without violating the performance of GBR users.