摘要:
The invention concerns a method for beam coordination between a first base station (M1) and a second base station (P1), wherein interfering beams (B2-B4) transmitted from the first base station (M1) are determined based on measured reference signals, dependent on a ranking of interfering beams (B2-B4) which shall be restricted in use, a restriction of a use of radio resources in the first base station (M1) in at least one ranked interfering beam (B3) is performed, and user terminals (UE1, UE2) served by the second base station (P1) are scheduled on radio resources which are restricted in use in the first base station (M1) in said at least one ranked interfering beam (B3), a base station and a user terminal therefor.
摘要:
The invention concerns a method for beam coordination between a first base station (M1) and a second base station (P1), wherein interfering beams (B2-B4) transmitted from the first base station (M1) are determined based on measured reference signals, dependent on a ranking of interfering beams (B2-B4) which shall be restricted in use, a restriction of a use of radio resources in the first base station (M1) in at least one ranked interfering beam (B3) is performed, and user terminals (UE1, UE2) served by the second base station (P1) are scheduled on radio resources which are restricted in use in the first base station (M1) in said at least one ranked interfering beam (B3), a base station and a user terminal therefor.
摘要:
The invention relates to a method for mitigating interference on a physical downlink control channel (PDCCH) used by at least two cells (C1, C2), the method comprising: distributing a number of control channel elements of the Physical Downlink Control Channel (PDCCH) among the cells (C1, C2), and determining a set of cell identifiers (cell ID1, cell ID2) for the cells (C1, C2) based on a number of collisions of the control channel elements in a downlink sub-frame (SF) of the Physical Downlink Control Channel (PDCCH), a location of the control channel elements in the downlink sub-frame (SF) being dependent on the cell identifiers (cell ID1, cell ID2). The invention also relates to a computer program product and to an arrangement (BS1) for implementing the method, as well as to a heterogeneous network (1) comprising at least one such arrangement (BS1).
摘要:
The present invention refers to a method (41) for a deciding on whether to perform a potential load balancing operation (57) in a wireless network (11) having a first cell with second cells embedded therein. In order to improve the overall performance of the network (11) a method (41) for deciding on a potential load balancing operation (57) in a wireless network (11) comprising a first base station (15) having a first cell (13) and at least one second base (21) station having a second cell, the first cell (13) and the second cell (21) at least partially over lapping each other, is suggested. This method (41) comprises evaluating (45) an impact of the potential load balancing operation (57) to an overall performance metric (M), said metric (M) characterizing the performance of the first cell (13) and the at least one second cell (19), and initiating the load balancing operation (57) if said evaluating indicates that the potential load balancing operation (57) would improve the performance according to the performance metric (M).
摘要:
A sounding method in a cellular wireless communication system, comprising at least one mobile station and at least two base stations. One base station is a serving base station for the mobile station and the at least one further base station is a neighboring base station. The serving base station generates a schedule for measurement signals and transmits said schedule to the mobile station and to the neighboring base station. The mobile station transmits measurement signals in accordance with the schedule to the serving base station and to the neighboring base station. Furthermore, the neighboring base station calculates a mean channel state for the uplink channel from the mobile station to itself and transmits the mean channel state to at least one further base station, so that said base station can be provided with channel estimations for uplink channels between the mobile station and all base stations.
摘要:
The present invention relates to a method for scheduling transmissions in a radio communication system comprising a plurality of base stations and a plurality of terminals, a base station being associated to a sector and transmitting/receiving data to/from terminals located in said sector. According to the present invention, the method comprises the steps of: —determining an area around each given sector, said area comprising a set of sectors, —allocating to said sectors in said area a scheduling priority chosen among at least two different scheduling priorities, —scheduling decisions in a sector having a lower scheduling priority than a sector belonging to said area depending on scheduling decisions made for said sector with higher scheduling priority, said scheduling decisions made in said sector with higher scheduling priority being reported by said base station associated to said sector with higher scheduling priority to said base station associated to said sector with lower scheduling priority.
摘要:
A Method for inter-cell interference coordination in a cellular communication network (11) comprising multiple macro base stations (15) controlling at least one of multiple macro cells (13) of the cellular network (11) and at least one pico base station (21) controlling at least one pico cell (19) of the cellular network (11), said pico cell (19) being located at least partially within at least one macro cell (13) comprises—assigning (57) a first portion (B1) of radio transmission resources (53) of the cellular network (11) and a second portion (B2) of said transmission resources (53) to each of said multiple macro base stations (15) for transmitting a radio signal using the first portion (B1) and the second portion (B2) of said transmission resources (53) and—limiting a maximum transmission power of the radio signal to be transmitted using the second portion (B2) to a transmit power limit (Pred) less than a maximum transmit power (PE) of the signal to be transmitted using the first portion (B1). In order to improve an overall throughput of the cellular network (11) and/or the spectral efficiency of transmission resources (53) of the cellular network (11), the method further comprises—assigning (59) the second portion (B2) of said transmission resources (53) to the pico base station (21) for transmitting the radio signal using the second portion (B2) of said transmission resources.
摘要:
The present invention relates to measurement in radio communication systems. In particular, the present invention relates to a sounding method in a cellular wireless communication system, the communication system itself and its components like base stations and mobile stations. The radio communication system (1) comprises at least one mobile station (2) and at least two base stations (3, 4). One of said base stations is a serving base station (3) for the mobile station (2) and the at least one further base station is a neighboring base station (4) of the serving base station (3). The serving base station (3) is adapted to generate a schedule for measurement signals and to transmit said schedule to the mobile station (2) and to the neighboring base station (4). The mobile station (2) is adapted to transmit measurement signals in accordance with said schedule to the serving base station (3) and to the neighboring base station (4). Furthermore, the neighboring base station (4) is adapted to calculate a mean channel state for the uplink channel from the mobile station (2) to itself (4) and to transmit said mean channel state to at least one further base station of the radio communication system (1), so that said base station can be provided with channel estimations for uplink channels between the mobile station (2) and all base stations within a certain area surrounding itself.
摘要:
The present invention relates to a method for reducing interference in the downlink direction of a cellular radio communication system comprising base stations communicating with terminals using a frame structure showing a time and frequency extension, said frame comprising a preamble portion and at least one data portion, said terminals being adapted to receive frames for which the receive power of said at least one data portion is varying in a predefined range relative to the receive preamble power of said preamble portion,According to the present invention, the method comprises the steps of: transmitting the part of said data portion destined to said terminal with a transmit power adapted to generate a first receive power (Plow) at said terminal within said range if said terminal belongs to a first group of terminals; transmitting the part of said data portion destined to said terminal with a transmit power adapted to generate a second receive power (Phigh) at said terminal within said range, said second receive power being higher than said first receive power, if said terminal belongs to a second group of terminals.
摘要:
The present invention relates to a method for scheduling transmissions in a radio communication system comprising a plurality of base stations and a plurality of terminals, a base station being associated to a sector and transmitting/receiving data to/from terminals located in said sector. According to the present invention, the method comprises the steps of: determining an area around each given sector, said area comprising a set of sectors, allocating to said sectors in said area a scheduling priority chosen among at least two different scheduling priorities, scheduling decisions in a sector having a lower scheduling priority than a sector belonging to said area depending on scheduling decisions made for said sector with higher scheduling priority, said scheduling decisions made in said sector with higher scheduling priority being reported by said base station associated to said sector with higher scheduling priority to said base station associated to said sector with lower scheduling priority.