WO2015109650A1 - Procédé et système de gestion de regroupement pour interférences croisées tdd et station de base - Google Patents

Procédé et système de gestion de regroupement pour interférences croisées tdd et station de base Download PDF

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WO2015109650A1
WO2015109650A1 PCT/CN2014/073729 CN2014073729W WO2015109650A1 WO 2015109650 A1 WO2015109650 A1 WO 2015109650A1 CN 2014073729 W CN2014073729 W CN 2014073729W WO 2015109650 A1 WO2015109650 A1 WO 2015109650A1
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interference
cells
cell
group
value
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PCT/CN2014/073729
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English (en)
Chinese (zh)
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张晨璐
张云飞
曹一卿
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东莞宇龙通信科技有限公司
宇龙计算机通信科技(深圳)有限公司
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Publication of WO2015109650A1 publication Critical patent/WO2015109650A1/fr

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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
    • H04W16/10—Dynamic resource partitioning

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a packet management method for TDD cross interference, a packet management system for TDD crossover, and a base station. Background technique
  • CCIM Cell Cluster Interference Mitigation
  • the scheme dynamically processes the cells according to the transmission loss or interference level between the base stations.
  • Cells with low transmission loss or high inter-cell interference levels are grouped into one group; base stations with large transmission loss or small inter-cell interference levels are classified into different groups. All the base stations in the group must be configured with the same TDD uplink-downlink subframe ratio configuration to avoid strong cross-interference.
  • Different groups can be configured with different TDD uplink-downlink subframe ratio configurations to adaptively uplink and downlink traffic load conditions. As shown in FIG.
  • the CCIM scheme gives an effective TDD dynamic subframe proportional configuration interference avoidance method, but still has the following drawbacks:
  • the present invention is based on the above problems, and proposes a new technical solution, which can divide a cell into multiple packets, and supports cells in different groups after re-grouping to use different TDD uplink and downlink subframe ratios for data transmission. Thereby increasing the dynamic configuration gain and effectively controlling cross interference.
  • the present invention provides a packet management method for TDD cross interference, which includes: grouping multiple cells by using a packet-based interference coordination technique, and performing the following steps on multiple cells belonging to the same group: A) In the multiple cells of the same group, if the interference value between any two cells is greater than or equal to the preset interference threshold, an interference relationship is established between the two cells, and the same group is used. All interference relationships between multiple cells constitute a corresponding interference relationship chain; B) grouping multiple cells corresponding to each of the interference relationship chains into the same group, and cells having no interference relationship with other cells are independently grouped; The cells in each group adopt the same TDD uplink and downlink subframe configuration parameters, and use the same or different TDD uplink and downlink subframe proportion configuration parameters between different groups.
  • interference between cells in the same interference relationship chain is strong (for example, greater than or equal to a preset interference threshold), and interference between cells in different interference relationship chains is weak, and the interference relationship chain is established and the corresponding Cell grouping helps to improve the accuracy of the packet, ensuring control of cross-interference while ensuring dynamic configuration gain.
  • the group management method further includes: determining any one according to the corresponding interference relationship chain.
  • the one or more of the cells that have the greatest degree of interference to other cells as the interference isolation cell specifically includes: acquiring each cell in the any group and other cells. Interference relationship existing between the two; the cell with the largest number of interference relationships is used as the cell with the greatest degree of interference to other cells.
  • the selection of the interference isolated cell can also be implemented in other ways.
  • the user manually selects the interference isolation cell according to the specified standard.
  • the base station or other equipment can compare and analyze the result of the automatic selection with the result manually selected by the user, thereby continuously correcting the above criteria, in order to achieve a more accurate and more suitable cell selection scheme.
  • the method further includes: determining, when the number of the most frequently used cells in the interference relationship is multiple, determining interference between each of the cells and other cells in any one of the groups The statistical value of the value; the cell with the largest corresponding statistical value is used as the cell with the greatest degree of interference to other cells.
  • the statistic value of all the interference values corresponding to each cell is obtained, so that the interference degree to other cells can be more accurately reflected on the basis of the number of interference relationships.
  • the largest cell in order to achieve accurate selection of the interference isolation cell, to avoid strong cross interference between cells in the secondary packet.
  • the process of calculating an interference value between any two cells includes: calculating a path loss between the two two cells, and converting into the interference value; The value of the path loss is inversely related to the interference value.
  • the invention also provides a packet management system for TDD cross interference, comprising: a packet processing unit, configured to group multiple cells by using a packet-based interference coordination technology; and a relationship chain establishing unit, which is used in the same group In the multiple cells, if the interference value between any two cells is greater than or equal to the preset interference threshold, an interference relationship is established between the two cells, and all interferences between multiple cells in the same group are used.
  • the relationship constitutes a corresponding interference relationship chain;
  • the parameter configuration unit is configured to divide the plurality of cells corresponding to each of the interference relationship chains into the same group, and the cells having no interference relationship with the remaining cells are independently grouped, and each is made
  • the cells in the group adopt the same TDD uplink and downlink subframe configuration parameters, and adopt the same or different TDD uplink and downlink subframe proportion configuration parameters between different groups.
  • interference between cells in the same interference relationship chain is strong (for example, greater than or equal to a preset interference threshold), and interference between cells in different interference relationship chains is weak, and the interference relationship chain is established and the corresponding Cell grouping helps to improve the accuracy of the packet, ensuring control of cross-interference while ensuring dynamic configuration gain.
  • the method further includes: a cell selection unit, configured to determine, in the case that the number of cells in any group is greater than a preset number, determine each of the groups according to the corresponding interference relationship chain The interference degree of the cell to other cells, and the cell with the greatest degree of interference to other cells is used as the interference isolation cell; the data interaction unit is configured to send isolation control signaling to the interference isolation cell, thereby controlling the interference isolation cell The remaining cells in the any group are isolated to divide the remaining cells into multiple sub-packets, and the same or different TDD uplink-downlink subframe proportion configuration parameters are used between the multiple sub-packets.
  • a cell selection unit configured to determine, in the case that the number of cells in any group is greater than a preset number, determine each of the groups according to the corresponding interference relationship chain The interference degree of the cell to other cells, and the cell with the greatest degree of interference to other cells is used as the interference isolation cell
  • the data interaction unit is configured to send isolation control signaling to the interference isolation cell, thereby controlling the interference isolation
  • the isolation is small by selecting interference.
  • the area is used to isolate and further group the cells in the group, so as to further improve the dynamic configuration gain, and avoid cross interference between cells in the group.
  • the cell selection unit includes: a relationship acquisition subunit, configured to acquire an interference relationship between each cell in the any group and other cells; and select a processing subunit, The cell with the largest number of interference relationships is used as the cell with the greatest degree of interference to other cells.
  • the selection of the interference isolated cell can also be implemented in other ways.
  • the user manually selects the interference isolation cell according to the specified standard.
  • the base station or other equipment can compare and analyze the result of the automatic selection with the result manually selected by the user, thereby continuously correcting the above criteria, in order to achieve a more accurate and more suitable cell selection scheme.
  • the cell selection unit further includes: a statistic value determining subunit, configured to determine each of the plurality of cells having the largest number of interference relationships a statistical value of the interference value between the cell and the other cells in any one of the groups; wherein the selection processing sub-unit is configured to use the cell with the largest corresponding statistical value as the interference degree to the other cells Community.
  • the statistic value of all the interference values corresponding to each cell is obtained, so that the interference degree to other cells can be more accurately reflected on the basis of the number of interference relationships.
  • the largest cell in order to achieve accurate selection of the interference isolation cell, to avoid strong cross interference between cells in the secondary packet.
  • the method further includes: an interference calculation unit, configured to calculate a path loss between any two cells, and convert the path loss into the interference value, where the path loss value and the interference The values are negatively correlated.
  • the present invention also provides a base station, comprising the method according to any one of the preceding claims
  • a packet management system for TDD cross-interference wherein the base station is a macro base station corresponding to a plurality of cells grouped by using a packet-based interference coordination technology, or a specific dynamically configured base station.
  • the cell can be divided into multiple groups, and the cells in different groups after re-grouping are used to transmit data by using different TDD uplink and downlink subframe ratios, thereby improving dynamic configuration gain and effectively controlling cross interference.
  • FIG. 1 shows a schematic diagram of grouping cells using packet-based interference coordination techniques
  • FIG. 2 shows a schematic flow diagram of a packet management method for TDD cross-interference according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of seven radio frames in a TDD system
  • FIG. 4 shows a schematic flow diagram of performing re-grouping of multiple cells of the same group, in accordance with one embodiment of the present invention
  • FIGS. 5A to 5C are diagrams showing a packet topology according to an embodiment of the present invention.
  • FIG. 6 is a schematic flow chart showing a cell group management method according to an embodiment of the present invention.
  • Figure 7 shows a schematic block diagram of a packet management system for TDD cross-interference in accordance with one embodiment of the present invention
  • Figure 8 shows a schematic block diagram of a base station in accordance with one embodiment of the present invention. detailed description
  • Cell grouping based on interference relationship 2 shows a schematic flow chart of a packet management method for TDD cross interference according to an embodiment of the present invention.
  • a packet management method for TDD cross interference includes:
  • Step 202 Group multiple cells by using a packet-based interference coordination technology.
  • Step 204 Perform re-grouping on multiple cells belonging to the same group, and configure TDD uplink and downlink subframe configuration parameters.
  • FIG. 3 shows a schematic structural diagram of seven radio frames in the TDD system.
  • the uplink subframe 304, and the downlink subframe 306 are arranged and combined, the corresponding TDD uplink and downlink subframe proportion configuration parameters with configuration numbers 0 to 6 are formed.
  • step 204 shown in FIG. 2 the specific steps are as shown in FIG. 4, including:
  • Step 204A In the multiple cells of the same group, if the interference value between any two cells is greater than or equal to a preset interference threshold, an interference relationship is established between the two two cells, and the same All the interference relationships between the multiple cells of the group form a corresponding interference relationship chain; Step 204B, the multiple cells corresponding to each of the interference relationship chains are grouped into the same group, and the cells having no interference relationship with the remaining cells are independent. Grouping
  • Step 204C The cells in each group adopt the same TDD uplink and downlink subframe configuration parameter, and use the same or different TDD uplink and downlink subframe proportion configuration parameters between different groups.
  • interference between cells in the same interference relationship chain is strong (for example, greater than or equal to a preset interference threshold), and interference between cells in different interference relationship chains is weak, and an interference relationship chain is established.
  • the corresponding cell grouping is implemented, which helps to improve the accuracy of the grouping, so as to ensure the control of the crossover interference while ensuring the dynamic configuration gain.
  • the packet 108 includes seven cells, and if the same TDD uplink and downlink subframe configuration parameters are used, the dynamic configuration gain is greatly reduced.
  • the re-grouping can be performed according to the interference relationship between the seven cells, so as shown in FIG. 5A, it can be divided into three groups, that is, a group consisting of eNB1, eNB2, eNB3, and eNB4. 1.
  • a group 2 consisting of eNB5 alone, and a group 3 consisting of eNB6 and eNB7, and the same or different TDD uplink and downlink subframe configuration parameters can be arbitrarily selected between group 1, group 2 and group 3, and get rid of the CCIM scheme.
  • the shackles help achieve a higher dynamic configuration gain.
  • Group 1 includes 4 cells (or base stations) such as eNB1 to eNB4, and the number is still large. Therefore, in order to further improve the dynamic allocation gain of the cell, further grouping operations can be performed on the group 1, which will be described in detail below.
  • the packet management method further includes: determining, according to the corresponding interference relationship chain, each cell pair in any one of the groups The interference level of other cells, and the cell with the greatest degree of interference to other cells is used as the interference isolation cell; and the interference isolation cell is controlled to isolate the remaining cells in any one of the groups to divide the remaining cells into multiple The sub-packets, and the same or different TDD uplink and downlink subframe proportion configuration parameters are used between the multiple sub-packets.
  • the topology shown in FIG. 5A is formed into a form as shown in FIG. 5B, and each cell or base station is compressed into a corresponding node form, for example, eNB1 corresponds to node VI, and eNB2 corresponds to node V2.
  • the eNB 7 corresponds to the node V7 or the like.
  • the four cells included in the group 1 shown in Fig. 5B obviously need to be grouped again.
  • the node V3 can be selected as an interference isolation cell, and the VI, V2 is isolated from V4, so that the original group 1 is further grouped, including the sub-groups composed of VI and V2, the sub-group 2 composed of V3 and the sub-group 3 composed of V4, and the sub-group 1 to sub-group 3, the group Between 1 and 3, the same or different TDD uplink and downlink subframe configuration parameters can be arbitrarily selected to help achieve higher dynamic configuration gain.
  • the interference isolation cell isolates the remaining cells of the multiple cells in the same group, the following:
  • the at least one interference isolated cell can be turned off.
  • the coverage of the at least one interfering isolated cell may be reduced, such that a coverage dead zone is formed between the at least one interfering isolated cell and all neighbor cells, or the at least one interfering isolated cell and all neighbors are
  • the cross-interference strength in the repeated coverage area between the cells is not greater than the preset interference strength threshold, or the served terminal is not present in the repeated coverage area.
  • the "isolation band" is artificially constructed, so that multiple groups are physically separated to avoid cross interference. Or when the cross-interference of the repeated coverage area is small or there is no serviced terminal, it is obvious that the influence of cross-interference on the terminal can also be avoided. It should be noted that although the coverage of the interfering isolated cell becomes smaller or is closed, since the communication system uses a dynamic configuration of the hybrid base station and the macro base station, the signal coverage of the terminal is not affected.
  • the step of reducing the coverage of the at least one interfering isolated cell comprises at least one of the following or a combination thereof: adjusting a signal transmission power of the base station in the at least one interfering isolated cell, and adjusting an antenna of the base station Height, adjusting the antenna downtilt angle of the base station.
  • the one or more of the cells that have the greatest degree of interference to other cells as the interference isolation cell specifically includes: acquiring each cell in the any group and other cells. Interference relationship existing between the two; the cell with the largest number of interference relationships is used as the cell with the greatest degree of interference to other cells.
  • the selection of the interference isolated cell can also be implemented in other ways.
  • the user manually selects the interference isolation cell according to the specified standard.
  • the base station or other equipment can compare and analyze the result of the automatic selection with the result manually selected by the user, thereby continuously correcting the above criteria, in order to achieve a more accurate and more suitable cell selection scheme.
  • both V2 and V3 in Group 1 form two interference relationships with other nodes, so V2 or V3 can be selected as the interference isolation cell for grouping Group 1 again.
  • FIG. 5C is a case where the group 1 is separated into a plurality of sub-packets after V3 is selected as the interference-isolated cell.
  • the method further includes: when the number of the most number of cells having the interference relationship is multiple, determining a statistical value of the interference value between each of the cells and other cells in the any group; The cell with the largest corresponding statistical value is the cell with the greatest degree of interference to other cells.
  • the statistic value of all the interference values corresponding to each cell is obtained, so that the interference degree to other cells can be more accurately reflected on the basis of the number of interference relationships.
  • the largest cell in order to achieve accurate selection of the interference isolation cell, to avoid strong cross interference between cells in the secondary packet.
  • the process of calculating the interference value between any two cells includes: calculating a path loss between the two cells and converting the interference value into the interference value; wherein the path loss is The value is inversely related to the interference value.
  • FIG. 6 shows a schematic flow chart of a cell packet management method according to an embodiment of the present invention.
  • a cell group management method includes: Step 602: Group multiple cells based on a CCIM scheme.
  • Step 604 Determine whether the number of base stations in each group after the grouping is large, such as whether it is greater than or equal to a preset number threshold, such as 2 or more (or less). If yes, go to step 606, otherwise end.
  • a preset number threshold such as 2 or more (or less).
  • the packet 108 shown in Fig. 1 includes 7 cells (or base stations), and further grouping needs to be implemented.
  • Step 606 Form a corresponding topology based on interference relationships between all base stations in the group.
  • the interference relationship can be calculated by calculating path loss between the base stations, etc., and those skilled in the art should understand that calculations such as signal reception strength and the like can also be performed by other means.
  • Step 608 Taking the path loss as an example, in the topology diagram, any two nodes with low path loss may be connected to form an edge.
  • the packet 108 shown in FIG. 1 constitutes a topology diagram as shown in FIG. 5B (or FIG. 5A, here, FIG. 5B is taken as an example), and is between VI, V2, V3, and V4.
  • Step 610 Calculate the degree corresponding to each node, and select the node with the largest degree of out. Among them, the "degree” corresponding to each node, that is, the number of "edges" with the node as the endpoint.
  • both V2 and V3 have a degree of 2 and belong to the node with the largest degree.
  • Step 612 Determine whether there are multiple nodes with the greatest degree. If yes, go to step 614. Otherwise, go to step 616.
  • step 614 is required to effect further selection confirmation.
  • Step 614 For each node with the largest degree, calculate the path loss average value corresponding to each node, and select the node corresponding to the minimum value as the interference isolation cell.
  • the statistical method is obviously not limited to the above average value, for example, other statistical values such as variance can also be calculated, thereby achieving accurate selection of nodes.
  • Step 616 If the number of nodes with the largest degree is unique, the node with the largest degree may be directly used as the interference isolation cell.
  • Step 618 Perform, according to the re-grouping of the corresponding group by the interference isolation cell, obtain multiple sub-packets, and dynamically select the TDD uplink-downlink subframe proportion configuration parameter in each sub-packet.
  • the secondary packet 1, the secondary packet 2, and the secondary packet 3 are obtained, and between the secondary packets and the group 2 and the group 3, the same or different is adopted arbitrarily.
  • TDD uplink and downlink subframe proportion configuration parameters are selected.
  • Figure 7 shows a schematic block diagram of a packet management system for TDD cross-interference in accordance with one embodiment of the present invention.
  • a packet management system 700 for TDD cross-interference includes: a packet processing unit 702, configured to group multiple cells by using a packet-based interference coordination technology; a relationship chain establishing unit 704, configured to establish, in a plurality of cells belonging to the same group, an interference relationship between any two cells if the interference value between any two cells is greater than or equal to a preset interference threshold, and the same relationship is established by the same All the interference relationships between the multiple cells of the group form a corresponding interference relationship chain; the parameter configuration unit 706 is configured to divide the multiple cells corresponding to each of the interference relationship chains into the same group, and there is no interference with the remaining cells.
  • the cells of the relationship are grouped independently, and the cells in each group adopt the same TDD uplink and downlink subframe configuration parameters, and the same or different TDD uplink and downlink subframe proportion configuration parameters are used between different groups.
  • interference between cells in the same interference relationship chain is strong (for example, greater than or equal to a preset interference threshold), and interference between cells in different interference relationship chains is weak, and the interference relationship chain is established and the corresponding Cell grouping helps to improve the accuracy of the packet, ensuring control of cross-interference while ensuring dynamic configuration gain.
  • the method further includes: a cell selection unit 708, configured to determine, in the case that the number of cells in any group is greater than a preset number, according to a corresponding interference relationship chain, determine each of the groups The interference degree of the cells to other cells, and the cell with the greatest degree of interference to other cells is used as the interference isolation cell; the data interaction unit 710 is configured to The interference isolation cell sends the isolation control signaling, so as to control the interference isolation cell to isolate the remaining cells in the any group to divide the remaining cells into multiple sub-packets, and the multiple sub-packets The same or different TDD uplink and downlink subframe proportion configuration parameters are used.
  • the cell selection unit 708 includes: a relationship acquisition subunit 7082, configured to acquire an interference relationship between each cell in the any group and other cells; 7084.
  • the cell that uses the most interference relationship is used as the cell with the greatest degree of interference to other cells.
  • the selection of the interference isolated cell can also be implemented in other ways.
  • the user manually selects the interference isolation cell according to the specified standard.
  • the base station or other equipment can compare and analyze the result of the automatic selection with the result manually selected by the user, thereby continuously correcting the above criteria, in order to achieve a more accurate and more suitable cell selection scheme.
  • the cell selection unit 708 further includes: a statistic value determining subunit 1086, configured to determine, in a case where the number of cells having the largest number of interference relationships is multiple a statistical value of the interference value between each cell and other cells in any one of the groups; wherein the selection processing sub-unit 7084 is configured to use the cell with the largest statistical value as the interference to the other cell The most densely populated area.
  • a statistic value determining subunit 1086 configured to determine, in a case where the number of cells having the largest number of interference relationships is multiple a statistical value of the interference value between each cell and other cells in any one of the groups.
  • the statistic value of all the interference values corresponding to each cell is obtained, so that the interference degree to other cells can be more accurately reflected on the basis of the number of interference relationships.
  • the largest cell in order to achieve accurate selection of the interference isolation cell, to avoid strong cross interference between cells in the secondary packet.
  • the method further includes: an interference calculation unit 712, configured to calculate a path loss between any two cells, and convert the interference to the interference value, where the path The value of the loss is inversely related to the interference value.
  • Figure 8 shows a schematic block diagram of a base station in accordance with one embodiment of the present invention.
  • a base station includes a TDD cross-interference packet management system 700 as shown in FIG. ; wherein the base station 800 is configured to perform grouping using a packet-based interference coordination technique.
  • the present invention provides a packet management method for TDD cross interference, a packet management system for TDD cross interference, and a base station, which can divide a cell into multiple packets.
  • the cells in different groups after re-grouping are used to transmit data using different TDD uplink and downlink subframe ratios, thereby improving dynamic configuration gain and effectively controlling cross interference.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

La présente invention concerne un procédé et un système de gestion de regroupement pour des interférences croisées TDD, ainsi qu'une station de base. Le procédé de gestion de regroupement comprend les étapes suivantes : regroupement de multiples cellules à l'aide d'une technologie de coordination d'interférences basée sur le regroupement ; et regroupement des multiples cellules appartenant à un même groupe en fonction d'une relation d'interférence, de sorte que les cellules dans chaque groupe utilisent un même paramètre de configuration de trame secondaire en liaison montante et en liaison descendante TDD et que différents groupes utilisent un paramètre de configuration proportionnelle de trame secondaire en liaison montante et en liaison descendante TDD identique ou différent. Grâce au processus technique de la présente invention, les cellules peuvent être divisées en de multiples groupes, les cellules dans différents groupes, après avoir été regroupées, peuvent utiliser une proportion différente de trame secondaire en liaison montante et en liaison descendante TDD pour une transmission de données, ce qui améliore le gain de configuration dynamique et régule efficacement les interférences croisées.
PCT/CN2014/073729 2014-01-24 2014-03-19 Procédé et système de gestion de regroupement pour interférences croisées tdd et station de base WO2015109650A1 (fr)

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CN105338533B (zh) * 2014-08-13 2019-05-21 电信科学技术研究院 一种小区间干扰协调方法及装置
CN105657714B (zh) * 2014-11-17 2019-03-22 电信科学技术研究院 一种微小区的配置的方法及装置
CN109964502B (zh) * 2016-12-22 2020-09-18 华为技术有限公司 一种小区分组方法及装置

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