WO2013023517A1 - 基站及其控制方法 - Google Patents
基站及其控制方法 Download PDFInfo
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- WO2013023517A1 WO2013023517A1 PCT/CN2012/079152 CN2012079152W WO2013023517A1 WO 2013023517 A1 WO2013023517 A1 WO 2013023517A1 CN 2012079152 W CN2012079152 W CN 2012079152W WO 2013023517 A1 WO2013023517 A1 WO 2013023517A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0023—Interference mitigation or co-ordination
- H04J11/005—Interference mitigation or co-ordination of intercell interference
- H04J11/0056—Inter-base station aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
- H04W16/06—Hybrid resource partitioning, e.g. channel borrowing
- H04W16/08—Load shedding arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/022—Site diversity; Macro-diversity
- H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J2211/00—Orthogonal indexing scheme relating to orthogonal multiplex systems
- H04J2211/001—Orthogonal indexing scheme relating to orthogonal multiplex systems using small cells within macro cells, e.g. femto, pico or microcells
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
Definitions
- the present invention relates to an apparatus and method for providing a service in a mobile communication network.
- it relates to a communication control server, a base station, and a terminal in a multi-base station joint service system.
- the mobile communication network mentioned here is a mobile communication system supporting multi-base station joint service. Background technique
- the 3rd-Generation Partnership Project is an international standards organization that has developed system architectures and standards for second- and third-generation mobile communication networks. These standards have been applied to networks that have already deployed air interfaces.
- 3GPP is embarking on a long-term evolution of LTE (Long-Term Evolution) for fourth-generation mobile communication networks, and its evolution version of LTE-Advanced is designed to increase the spectrum utilization (throughput/bandwidth) of the system. , especially the spectrum utilization at the cell edge.
- Figure 1 is a typical heterogeneous network service scenario based on the elCIC-based interference cancellation mechanism. This mechanism is called enhanced inter-cell interference coordination (eIC).
- the range covered by the macro base station Macro eNB 1 is called a macro cell.
- the range covered by the micro base station Pico 2 is called a micro cell.
- the method of extending the coverage of a cell is called “Range Expansion”, which is to add an offset value when the user (which will be replaced by UE: User Equipment later), only when the macro cell is stronger than the signal of the micro cell.
- the macro cell When set, the macro cell is selected as the serving cell. Otherwise, although the signal of the micro cell is not as strong as the macro cell, the micro cell is selected as the serving cell. The consequence of this is that the edge UE3 will be subject to strong co-channel interference from the macro cell.
- a common approach is to divide resources in the time domain.
- the macro cell uses a specific resource format, including ABS (Almost Blank Subframe) and normal frame.
- ABS Almost Blank Subframe
- the UE at the edge of the micro cell can only be called when the macro cell sends an ABS frame, so that the performance of the macro cell can be avoided.
- the macro cell configures an ABS frame at subframe 2 and subframe 6.
- the macro cell remains silent on the resource particles of the non-reference signal, that is, no data signal is transmitted. Therefore, for the UE in the micro cell, the signal at the corresponding position of the two subframes will receive less interference, and a higher signal to noise ratio is obtained.
- the micro cell performs data transmission for its own edge UE at the position of the sub-frame number of the cell and the subframe 0.
- the macro cell performs normal data transmission on the UE in the own cell, and the UE in the micro cell has strong interference, so the micro cell is only suitable for the cell center with high signal to noise ratio at this time.
- the nearby UE performs scheduling.
- FIG 3 is a typical heterogeneous network service scenario based on the CoMP interference cancellation mechanism.
- the macro cell 1 is connected to the remote radio head (RRH) through the optical fiber.
- RRH remote radio head
- the RRH is used to provide services for hotspot areas and provide micro-area coverage. Due to the high-capacity and low-latency interface support, the complex and multi-cell coordination information can be quickly exchanged at multiple nodes, making CoMP implementation possible.
- CoMP Coordinatd Multipoint Transmission/Reception
- Multi-point coordinated transmission can perform beamforming according to the position of the terminal from each point, which can eliminate inter-cell interference, and even convert inter-cell interference into useful signals, which can greatly enhance the performance of the cell edge UE.
- Figure 10 is a diagram showing the internal structure of the RRH.
- 1001 Baseband signal transmitted from a base station through an optical fiber.
- 1002 Inverter, the process of spectrum shifting a signal.
- Downstream The baseband signal is converted into a frequency band signal by frequency conversion;
- Uplink The frequency band signal is converted into a baseband signal by frequency conversion.
- 1003 Analog to Digital Converter, Downstream: Converts a digital signal to an analog signal; Up: Converts an analog signal to a digital signal.
- 1004 Filter that filters out certain frequency components from the signal to suppress and prevent interference.
- 1005 Amplifier. The signal is power amplified to meet the transmit power requirements.
- 1006 Duplexer, isolates the transmit and receive signals to ensure that both work properly.
- 1007 Antenna, transmitting and receiving wireless signals.
- Figure 4 is an example of frame resource allocation based on the scene of Figure 3.
- the macro cell cooperates with the micro cell at subframe 4 to provide service to the micro cell edge UE.
- the macro cell performs beamforming on the transmission signal according to the scheduling information to eliminate interference to the target UE of the micro cell; or simultaneously sends a signal to the target UE together with the micro cell, so that the target UE obtains a higher signal to noise ratio.
- the cooperation between the macro cell and the micro cell requires the information exchange and unified scheduling of the two. For other frames, both parties provide services to other UEs in their own cell. Since the UE signal and noise are relatively low at the edge, it is not suitable to schedule these UEs for data transmission in non-coordinated frames.
- elCIC In the 3GPP proposal R1-105724, detailed descriptions of elCIC and related techniques are given, such as the design of the macro cell ABS frame allocation pattern and the determination of the micro cell edge UE measurement set.
- the macro area ABS frame allocation pattern needs to support the macro cell system information broadcast while protecting the micro cell edge UE data transmission, and needs to meet the protection requirements of the micro cell edge UE feedback information. Since elCIC belongs to multiplexing in the time domain, it is necessary to adjust the channel measurement timing for a specific UE to ensure the accuracy of the measurement result.
- the macro cell does not transmit data on a specific frame. However, if there is no UE at the edge of the micro cell for a long time, such a configuration is obviously a waste of macro cell resources. Summary of the invention
- the present invention will introduce such a UE-specific interference cancellation mechanism.
- the present invention provides a base station, comprising: a transceiver unit for transmitting and receiving data with a communication node and a terminal; a location information storage unit, location information of the storage terminal in the wireless communication network; a region extension state information storage unit, storing The area extension status information of each communication node corresponding to each terminal; and the control unit determining, based at least on the location information of the terminal in the wireless communication network and the area extension status information of each communication node corresponding to each terminal Service policy for the terminal.
- the service policy is Macro-RRH elCIC service policy (803+821), RRH-RRH CoMP or RRH-Macro CoMP service policy (815), Macro-RRH CoMP service policy (819), Macro-RRH elCIC + RRH - RRH CoMP Service Policy (803+809), Macro or RRH Separate Service Policy (821).
- the control unit adopts a Macro-RRH elCIC service policy for the terminal.
- the control unit adopts a Macro-RRH eICIC+ RRH-RRH CoMP service policy for the terminal.
- the control unit is The terminal uses the communication node (Macro or RRH) to service the policy alone.
- the terminal when the terminal is scheduled, when the macro cell corresponding frame is a non-ABS frame, when the user is the primary serving cell edge user, when the user's RE status is on, the user will not be assigned any resources.
- the control unit uses the communication node (RRH) alone service policy for the terminal.
- the control unit adopts an RRH-RRH CoMP or RRH-Macro CoMP service policy for the terminal.
- the control unit adopts the communication node (Macro) alone service policy to the terminal.
- the control unit adopts a Macro-RRH CoMP service policy for the terminal.
- the traffic detection unit further includes a channel quality information fed back by the terminal, calculates a channel quality difference between the terminal and each communication node, and estimates a location of the terminal based on the quality difference.
- a priority information storage unit that stores priority information that is called by each terminal, and the base station invokes each of the terminals according to a priority in each scheduling period.
- FIG. 1 is a diagram showing a typical heterogeneous network service scenario based on an elCIC-based interference cancellation mechanism.
- Fig. 2 is a diagram showing an example of frame resource allocation based on the scene of Fig. 1.
- FIG. 3 is a diagram showing a typical heterogeneous network service scenario based on a CoMP interference cancellation mechanism.
- Fig. 4 is a diagram showing an example of frame resource allocation based on the scene of Fig. 3.
- Figure 5 is a diagram showing a typical heterogeneous network service scenario based on a user-specific interference cancellation mechanism.
- Fig. 6 is a view showing an example of a structure of an internal structure of a base station.
- Figure 7 is a diagram showing typical signaling interactions between cells and users.
- Figure 8 is a flow diagram of a user-specific interference cancellation mechanism decision and resource allocation algorithm.
- Figure 9 is an example of end user specific frame resource allocation in an embodiment.
- FIG. 10 is a diagram showing the internal structure of the RRH. detailed description
- FIG. 5 is a typical heterogeneous network service scenario based on UE-specific interference cancellation mechanisms.
- RRH In the coverage area of a macro cell, there are four RRHs. RRH only has the function of transmitting and receiving signals. All control functions are performed by the central control unit of the macro base station, see Figure 6-601.
- the UE5 is a user at the center of the macro base station
- the UE6 is a user at the center of the RRH.
- the received signal from the base station or the RRH is good enough, the interference is relatively small, and the service can be directly provided by the base station or the RRH.
- Use elCIC or CoMP technology Use elCIC or CoMP technology.
- UE1, UE2, UE3 and UE4 are UEs at the edge of the RRH, respectively, and will be greatly interfered.
- the present invention will be based on this scenario for the interpretation of the interference cancellation mechanism for these edge users.
- Fig. 6 is an example of an internal structure diagram of a base station.
- 601 Central control unit of the base station. responsible for high-level wireless resource control algorithms. Some of the modules and parameters associated with the present invention are listed therein.
- 6011 User RE status information storage unit. Stores the RRH corresponding to the user and uses the RE operation. If the RE is enabled, a higher RE offset value will be set, and the UE will use this value for cell selection. For UEs in the macro cell, this value is none.
- User channel quality information storage unit The channel quality of its primary service cell and neighbor cells measured by the user is stored.
- the channel quality is represented by two parameters, one is the pilot signal receiving power, and the English name is RSRP (Reference Signal Received Power). Defined as the linear average of the power sum of the pilot signal resource blocks. Represents the absolute value of the received useful signal. One is the pilot signal reception quality, and the English name is RSRQ (Reference Signal Received Quality). Defined as the sum of the useful received power within the transmission bandwidth compared to the total received power. Represents the relative value of the signal-to-interference ratio.
- RSRP Reference Signal Received Power
- RSRQ Reference Signal Received Quality
- User location information storage unit Stores the approximate location of each user, whether it is a central user or an edge user. If it is an edge user, it is at the edge of which nodes.
- the CSI information (channel status information) of each user is stored.
- Each cell of the user's measurement set corresponds to a CSI value.
- User priority information storage unit Stores priority information for each user.
- the priority calculation method uses a proportional fair algorithm.
- R k The average transmission rate over the past period of time.
- 6016 Traffic Monitoring Unit. This module mainly predicts the traffic distribution by reading the radio resource occupancy of each cell in the coverage area of the macro base station. When the resource load of the macro cell is higher than a threshold, load balancing and access control should be considered. Select the area where the macro cell user density is concentrated, and select the RRH with a relatively light load to enable the RE function. And save the results in 6011.
- User channel quality monitoring unit The channel quality information fed back by the user is read and stored in the user channel quality information storage unit 6012, and the channel quality difference between the user and each of the reported N cells is calculated. If the quality is very different, prove that this user is in the center of the main service cell. If the quality difference is small, the description is at the edge of the cell. And estimating the user location information according to the received (N-1) channel quality difference.
- N is a positive integer of 1 or more.
- Interference suppression control and radio resource allocation unit User location information stored in the user location information storage unit 6013, user channel state information stored in the user channel state information storage unit 6014, user priority information storage unit, according to the user RE state information stored in the user RE state information storage unit 6011.
- the user priority information stored in 6015 is subjected to decision and resource allocation according to the methods of FIG. 8 and FIG.
- the baseband signal processing unit is notified of the result corresponding to a certain user assignment.
- the content of the control information includes the user ID, the included serving cell ID, and the interference suppression policy.
- 602 User data cache. Store user data to be sent.
- Baseband signal processing unit The received user data from the user data buffer 602 and the resource allocation control signaling from the interference suppression control and radio resource allocation unit 6018 are A series of baseband processing such as line modulation coding.
- 603 will get the information of 6018, and at the moment of the Macro eNB #2 frame, the cell edge users UE1 and UE3 will be called.
- 603 will perform interference estimation on the UE1 service policy according to Macro-RRHl elCIC, RRH1.
- This part of the data is subjected to channel coding, modulation, single-cell MIMO precoding and other baseband processing and then sent by 605 to the corresponding antenna port of RRH1 (604).
- RRH1 will transmit data to UE1 at the time of #0 frame.
- 603 will perform interference estimation on the policy of CoMP service for UE3 according to Macro-RRHl elCIC, RRH3-RRH4. This part of the data is subjected to channel coding, modulation, joint (RRH3 and RRH4) precoding and other baseband processing and then sent by 605 to the corresponding antenna ports of RRH3 and RRH4 (604). RRH3 and RRH4 will transmit data to UE3 at the time of #0 frame. In order to guarantee the joint transmission of CoMP from different transmitting nodes, each transmitting node must be strictly synchronized.
- Figure 7 is a typical signaling interaction diagram of each cell and user.
- the traffic monitoring unit 6016 in the central control unit 601 monitors the distribution of each service density of the network in real time through the transmission type and status of all users in the network. Then, according to the traffic volume of the macro cell user, it is determined whether the RE function is enabled for each subordinate RRH. In the high traffic area of the network, the load is transferred from the macro cell to the RRH by enabling the RE function for these RRHs. In the low traffic area, you do not need to enable the RE function to deliberately perform network load sharing.
- Each UE reports a channel quality measurement report message to its primary serving cell.
- the measurement report message contains channel quality information between the UE and its primary serving cell and neighboring cells.
- the channel quality information is directly stored. If the primary serving cell of the UE is an RRH, it is forwarded by the RRH to the macro base station and stored.
- the format of the measurement report message is: primary serving cell ID/corresponding RSRP/RSRQ value, multiple neighbor cell IDs/corresponding RSRP/RSRQ values.
- the user channel quality monitoring unit 6017 in the central control unit 601 of the base station calculates the location information of the user based on the channel quality information of each user, and stores it in the user location information storage unit 6013.
- the base station selects, in a pre-selected frame format, a frame format with a suitable degree of ABS density according to the edge UE (RE ON) and the information about the total UE. If there is no edge UE (RE on), the base station does not take any ABS frame format and sends a normal frame.
- the selection of the frame format can be performed as follows. It is known that within the coverage of the macro cell, the primary serving cell is RRH1, RRH2, .., and the number of edge UEs (RE ON) of the RRHn micro cell is xl, x2, ..., xn, and the primary serving cell is a macro.
- the number of UEs in a cell is xm, and the proportion of ABS frames in one cycle should be: Among them, "as a factor, the purpose is to average the number of UEs at the edge of the microcell edge" has an overall impact on system performance.
- the factor can be generated by various generation methods, for example, it is equal to the ratio of the average value of the number of UEs at the edge of the micro cell to the maximum value, that is,
- the frame format corresponding to the density can be selected in the preselected ABS frame format.
- the base station configures measurement information to the UE by using the RRH.
- the UE is notified by a parameter "restrictive measurement indication". If the indication is off, the ABS information will not be configured for the UE. Otherwise, the selected ABS frame format information will be sent to the UE.
- the relevant information in MeasObjectEUTRA is as follows:
- the edge UE performs restrictive measurement according to the frame format and reports a restricted measurement report.
- the measurement report message format is the same as 702.
- a threshold is defined in advance. As long as the difference between the RSRP/RSRQ value of a neighboring cell and the RSRP/RSRQ value of the primary serving cell is less than the threshold, the cell is added to the CSI measurement set. Or define a measurement set size N in advance. The N cells with the best signal quality are added to this CSI measurement set.
- Config A list of cells in the measurement set, including
- the UE measures the pilot according to the measurement configuration and calculates channel state information.
- Each UE feeds back CSI to its primary serving cell.
- the CSI information of the PUCCH in the existing Rel.10 needs to be expanded.
- the CSI information corresponding to each cell in the CSI measurement set should be included. If the primary serving cell of the UE is a macro base station, the channel state information is directly stored in 6014. If the primary serving cell of the UE is an RRH, it is forwarded by the RRH to the macro base station and stored.
- the central control unit of the base station starts to determine the user-specific interference suppression mode.
- the base station central control unit performs baseband processing on the data of the specific user according to a specific interference suppression method.
- the baseband signal is sent to the corresponding transmitting node for transmission.
- Figure 8 is a flow diagram of a user-specific interference cancellation mechanism decision and resource allocation algorithm.
- Figure 9 is an example of end user specific frame resource allocation in an embodiment.
- the base station configures a 40 ms ABS frame format 901, or an ABS format 902 without a period limit, and sends it to the UE through the RRH.
- the 8 ms frame resource is intercepted for resource allocation description.
- Each lms is the length of a frame 903, which is also a scheduling period as described in FIG.
- the resource allocates each scheduling period once, and each time it is allocated according to the method of Figure 8.
- the traffic monitoring unit 6016 in the central control unit 601 monitors the network traffic density distribution in real time through the transmission type and status of all users in the network.
- the traffic near RRH1 and RRH2 is large, and the RE status of both is enabled.
- the traffic near RRH3 and RRH4 is small, and the RE status of both is closed.
- the central controller informs the RRH of each REH and sends it to its affiliated UE.
- the focus here is on the interference suppression strategy of the edge users of the RRH directly related to the present invention.
- the user channel quality monitoring unit 6017 in the central control unit 601 of the base station calculates the location information of the user based on the channel quality information of each user, and stores it in the user location information storage unit 6013.
- four typical edge users were found by comparing the signal strengths:
- UE2 its primary serving cell is RRH2.
- the neighboring cells are RRH1, RRH3, RRH4 and macro cells.
- the signal from the primary serving cell is below the threshold T1, which proves not to be the cell center user but at the edge of RRH2.
- the primary serving cell and the neighboring cell are RRH1, RRH3, and RRH4.
- the signal difference is D1, ⁇ 2, and D3, where D1 is less than the threshold T2, which proves that it is at the edge of RRH1 and is far from RRH3 and RRH4. Since this user accesses RRH2, it is considered to be at the edge of the macro cell.
- the base station edge users UE1 and UE2 select an ABS frame format.
- the RRH sends the ABS frame format information selected by the base station to its edge UE, and the edge UE performs restrictive measurement according to the frame format.
- UE1 and UE2 can be called only in the ABS frame position, so only the RSRQ and RSRP values of the ABS frame position are measured.
- UE3, UE4 has the possibility of being called in both ABS frame and non-ABS frame position. Therefore, the RSRQ and RSRP values of the ABS frame position and the RSRQ and RSRP values of the non-ABS frame position should be measured separately.
- the central control unit calculates the CSI measurement set of the edge user according to the measurement report.
- the UE4 ⁇ RRH4, Macro ⁇ sends the measurement configuration information to the UE.
- the UE measures the pilot according to the measurement configuration and calculates channel state information.
- Each UE feeds back channel state information to its primary serving cell. If the primary service cell of the UE is a macro base station, the channel state information is directly stored in 6014. If the primary service cell of the UE is an RRH, it is forwarded by the RRH to the macro base station and stored.
- the interference suppression control and radio resource allocation unit 6018 in the central control unit of the base station starts to determine the user-specific interference suppression mode.
- the information of 6011, 6013, 6014, 6015 will be combined and sorted according to user priority. Get the table below.
- CoMP CoMP
- the 6018 in the central control unit of the base station begins the algorithm flow of Figure 8, determining the interference suppression mode and allocating frame resources to the user. It is worth noting that in the user scheduling, there will be many users in the center of the cell mixed in. Because it is not the object we are paying attention to, there is not much explanation here.
- Their resource allocation methods are in 806, 812, 820 in Figure 8. Illustrated in 821, it will be allocated as the occupied primary serving cell resource. Their resource allocation results are shown in Figure 9 with dark frame tables. We only highlight the resource allocation methods for four typical RRH edge users.
- the 801 new scheduling cycle begins. Assume that this corresponds to the #2 frame of the Macro layer of Figure 9, and the #0 frame of the RRH layer. (Assume that the last two scheduling periods, #1, #2 two frames are occupied by the cell center user). It is assumed that the order of priority of the user at this time is UE1, UE2, UE3, UE4 (which is interspersed with the cell center UE).
- the user scheduled at this time should adopt the 803 Macro-RRH elCIC strategy.
- 804 calls the highest priority user UE1. Since it is not a macro cell user (805), nor a cell center user (806), RRH1 does not have the possibility of CoMP with other RRHs (807), the frame of the primary serving cell is not occupied (820), and the primary serving cell RRH1 is allocated. Resource #0 frame to it (821). Resource allocation result Macro-RRH 1 elCIC, as shown in 904 in Figure 9. 823 This scheduling period also has unassigned resources #0 frame of RRH2, #0 frame of RRH3, and RRH4#0 frame.
- the highest priority user UE2 is selected (804). Since it is not a macro cell user (805) or a cell center user (806), RRH2 has the possibility of performing CoMP with RRH1 (807), but the #0 frame of RRH1 is already occupied by UE1 at this time (808), so UE2 It is not called (822) during this scheduling period.
- the highest priority user UE3 is selected (804). Since it is not a macro cell user (805), nor a cell center user (806), RRH3 can perform CoMP (807) with RRH4, and the #0 frame of RRH3 and the #0 frame of RRH4 are not occupied (808), so UE3 Finally, the CoMP strategy of RRH3-RRH4 (809) was adopted. Since the corresponding macro cell is ABS Frame, which means that the macro cell and the RRH default to the elCIC policy. The combined resource allocation result is Macro-RRH eICIC+ RRH3-RRH4 CoMP as shown in 905 in FIG.
- the 801 new scheduling period starts, corresponding to the #3 frame of the Macro layer and the #1 frame of the RRH layer.
- the user priority list is rearranged.
- UE2, UE4, UE1, UE3 (with the cell center UE interposed). It is assumed that users of a cell center with a high priority are scheduled during this period. Until the resources are fully occupied.
- the 801 new scheduling period begins, corresponding to the #4 frame of the Macro layer and the #2 frame of the RRH layer.
- the macro cell frame is not an ABS frame (802).
- the user priority list is rearranged. It is assumed that the order of arrangement is UE2, UE4, UE1, UE3 (with the cell center UE interposed). Select the highest priority user UE2 (811).
- the user is the primary serving cell edge user (812), and the RE state is ON (816), and the user is not assigned any resources (822) in this frame.
- the highest priority user UE4 (811) is selected.
- the user is the primary serving cell edge user (812), the user's RE status is off (816), RRH4 can cooperate with Macro for CoMP, RRH4 frame #2 and Macro frame #4 are not occupied, and RRH4-Macro CoMP is allocated ( 815), the result is 906 in Fig. 9.
- the new scheduling period of 801 starts, corresponding to the #5 frame of the Macro layer and the #3 frame of the RRH layer.
- the user priority list is rearranged.
- UE2, UE1, UE3, UE4 (with the cell center UE interposed). It is assumed that users of a cell center with a high priority are scheduled during this period. Until the resources are fully occupied.
- the 801 new scheduling period begins, corresponding to the #6 frame of the Macro layer and the #4 frame of the RRH layer.
- the user priority list is rearranged. UE2, UE1, UE3, UE4 (with the cell center UE interposed).
- the user UE2 is called. 802, since the Macro Pillow corresponding to this scheduling period is an ABS frame, the users scheduled at this time should adopt the 803 Macro-RRH elCIC strategy.
- 804 calls the highest priority user UE2 (804). It is not the central user of the primary serving cell (806).
- the CSI measurement of the user has RRH1 for CoMP and RRH2-RRH1 CoMP policy.
- the result of resource allocation after the synthesis of 803 is Macro-RRH eICIC+ RRH2-RRH1 CoMP as shown in 907 of Figure 9.
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Application Number | Priority Date | Filing Date | Title |
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EP20120823735 EP2744254A4 (en) | 2011-08-12 | 2012-07-25 | BASE STATION AND METHOD FOR ITS CONTROL |
US14/238,077 US20140187263A1 (en) | 2011-08-12 | 2012-07-25 | Base station and control method thereof |
JP2014523183A JP2014524678A (ja) | 2011-08-12 | 2012-07-25 | 基地局及びその制御方法 |
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CN2012100499699A CN102932928A (zh) | 2011-08-12 | 2012-02-29 | 基站及其控制方法 |
CN201210049969.9 | 2012-02-29 |
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PCT/CN2012/079152 WO2013023517A1 (zh) | 2011-08-12 | 2012-07-25 | 基站及其控制方法 |
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EP (1) | EP2744254A4 (zh) |
JP (1) | JP2014524678A (zh) |
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WO (1) | WO2013023517A1 (zh) |
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JP2016541188A (ja) * | 2013-12-02 | 2016-12-28 | ホアウェイ・テクノロジーズ・カンパニー・リミテッド | 無線通信システム内で無線リソースをミュートする方法およびシステム |
JPWO2015151207A1 (ja) * | 2014-03-31 | 2017-04-13 | 富士通株式会社 | 無線通信システム、無線通信方法、無線局および制御局 |
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CN104813696A (zh) * | 2012-09-27 | 2015-07-29 | 美国博通公司 | 用于协调资源分配以解决小区间干扰的方法 |
US9413502B2 (en) * | 2012-10-15 | 2016-08-09 | Headwater Partners LLC | Backhaul assisted by user equipment |
CN104168558B (zh) * | 2013-05-17 | 2017-12-22 | 中国移动通信集团公司 | 一种用户位置信息报告流量控制方法和系统 |
CN103281733B (zh) | 2013-05-22 | 2016-12-28 | 华为技术有限公司 | 异构网络中下行发射方法和控制设备、基站和异构系统 |
US9887714B2 (en) | 2014-07-04 | 2018-02-06 | Telefonaktiebolaget Lm Ericsson (Publ) | Remote radio head and associated method |
JP6495803B2 (ja) * | 2015-10-30 | 2019-04-03 | Kddi株式会社 | 基地局装置、指向方向制御方法およびプログラム |
KR102138618B1 (ko) * | 2015-12-24 | 2020-07-29 | 주식회사 윌러스표준기술연구소 | 불연속 채널을 이용한 무선 통신 방법 및 무선 통신 단말 |
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Also Published As
Publication number | Publication date |
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CN102932928A (zh) | 2013-02-13 |
EP2744254A1 (en) | 2014-06-18 |
JP2014524678A (ja) | 2014-09-22 |
US20140187263A1 (en) | 2014-07-03 |
EP2744254A4 (en) | 2015-04-29 |
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