CN113645704A - Multi-cell joint resource allocation method and system - Google Patents
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Abstract
The invention discloses a multi-cell joint resource allocation method and a multi-cell joint resource allocation system, relates to the technical field of wireless communication, and aims to solve the problem that joint resource allocation among multiple cells cannot be dynamically performed according to terminal position change. The distribution method comprises the following steps: the method comprises the steps that a main transmission cell updates user service data and joint resources in real time, a multi-cell joint resource allocation table is constructed when a terminal is in a motion state, the multi-cell joint resource allocation table, the user service data and the joint resources are sent to a cooperative transmission cell, the cooperative transmission cell is made ready for wireless resources used for communicating with the terminal, the terminal can directly interact with the terminal when in communication connection with the terminal, waiting time is saved, and data transmission efficiency of the terminal during switching among the cells can be remarkably improved. The multi-cell joint resource allocation method and the system are used for allocating joint resources among the cells in the wireless communication process.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a terminal location adaptive multi-cell joint resource allocation method and system.
Background
Ultra-Dense networking (UDN) is one of the key technologies in the fifth Generation Mobile Communication Technology (5th Generation Mobile Communication Technology, 5G), and increases the data transmission rate and reduces the time delay by deploying a large number of small base stations in a Dense range. In 5G and future mobile communication technologies, high frequency bands are used for wireless communication, and in the case of ultra-dense networking, when a terminal changes its position, it is necessary to frequently switch between different small base stations, which may cause additional signaling overhead. Therefore, UDNs have a large challenge to mobility. To solve this problem, 5G proposes the concept of a virtual cell centered on the terminal: in the process of terminal movement, a virtual cell is formed by taking a terminal as a center, and the virtual cell is composed of a master transmission node (master TP) and a plurality of service transmission nodes (slave TP), wherein the master TP is responsible for all high-level control signaling, allocates wireless resources, schedules data receiving and transmitting, and the slave TP performs cooperative transmission according to the indication of the master TP without performing resource allocation.
However, at present, there is a problem how to dynamically perform joint resource allocation among a plurality of cells according to the change of the terminal location.
Disclosure of Invention
The invention aims to provide a multi-cell joint resource allocation method and a multi-cell joint resource allocation system, which are used for dynamically allocating joint resources among multiple cells according to the position change of a terminal and improving the data transmission efficiency of the terminal during switching among the multiple cells.
In order to achieve the above purpose, the invention provides the following technical scheme:
a multi-cell joint resource allocation method comprises the following steps:
the main transmission cell updates user service data and joint resources in real time, and judges whether the terminal is in a motion state in real time to obtain a first judgment result; the main transmission cell is a cell which is in communication connection with the terminal at present;
if the first judgment result is yes, the main transmission cell calculates a predicted space-time trajectory of the terminal in a predicted time period based on the historical space-time trajectory of the terminal, the geographical positions of a plurality of first cells adjacent to the main transmission cell are respectively matched with the predicted space-time trajectory to obtain a matching weight of each first cell, and the plurality of first cells with the matching weights larger than a preset weight value are selected as cooperative transmission cells;
the main transmission cell acquires the time lead and the channel measurement information of each cooperative transmission cell, and a multi-cell joint resource allocation table is constructed based on the predicted space-time trajectory, the matching weight, the time lead and the channel measurement information;
and the main transmission cell sends the multi-cell joint resource allocation table, the user service data and the joint resources to the cooperative transmission cell, and the next cooperative transmission cell in communication connection with the terminal is used as a main transmission cell in the next cycle.
Compared with the prior art, in the multi-cell joint resource allocation method provided by the invention, the main transmission cell updates user service data and joint resources in real time, when the terminal is in a motion state, the predicted space-time trajectory of the terminal in the predicted time period is calculated based on the historical space-time trajectory of the terminal, the cooperative transmission cell is selected according to the predicted space-time trajectory, the multi-cell joint resource allocation table is constructed according to the related information of the cooperative transmission cell, and the multi-cell joint resource allocation table, the user service data and the joint resources are sent to the cooperative transmission cell, so that the cooperative transmission cell is ready for wireless resources for communicating with the terminal.
The invention also provides a multi-cell joint resource allocation system, which comprises:
the judging module is used for enabling the main transmission cell to update user service data and joint resources in real time and judging whether the terminal is in a motion state in real time to obtain a first judging result; the main transmission cell is a cell which is in communication connection with the terminal at present;
a selecting module, configured to calculate, by the primary transmission cell, a predicted space-time trajectory of the terminal within a predicted time period based on a historical space-time trajectory of the terminal if the first determination result is yes, match geographical positions of a plurality of first cells adjacent to the primary transmission cell with the predicted space-time trajectory, respectively, to obtain a matching weight of each first cell, and select, as a cooperative transmission cell, the plurality of first cells whose matching weights are greater than a preset weight;
a building module, configured to enable the primary transmission cell to obtain a time advance and channel measurement information of each cooperative transmission cell, and build a multi-cell joint resource allocation table based on the predicted space-time trajectory, the matching weight, the time advance, and the channel measurement information;
and a returning module, configured to enable the primary transmission cell to send the multi-cell joint resource allocation table, the user service data, and the joint resource to the cooperative transmission cell, and use a next cooperative transmission cell in communication connection with the terminal as a primary transmission cell in a next cycle.
Compared with the prior art, the beneficial effect of the multi-cell joint resource allocation system provided by the invention is the same as that of the multi-cell joint resource allocation method in the technical scheme, and the detailed description is omitted here.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart of a method of an allocation method according to embodiment 1 of the present invention.
Fig. 2 is a signaling flow diagram of an allocation method according to embodiment 1 of the present invention.
Fig. 3 is an application scenario diagram of the allocation method provided in embodiment 1 of the present invention.
Fig. 4 is a system block diagram of the distribution system provided in embodiment 2 of the present invention.
Description of the drawings:
101-a web server; 110-a terminal; 111-a first base station; 112-a second base station; 113-a third base station; 114-a fourth base station; 130-prediction of space-time trajectory.
Detailed Description
In order to facilitate clear description of technical solutions of the embodiments of the present invention, in the embodiments of the present invention, terms such as "first" and "second" are used to distinguish the same items or similar items having substantially the same functions and actions. For example, the first threshold and the second threshold are only used for distinguishing different thresholds, and the sequence order of the thresholds is not limited. Those skilled in the art will appreciate that the terms "first," "second," etc. do not denote any order or quantity, nor do the terms "first," "second," etc. denote any order or importance.
It is to be understood that the terms "exemplary" or "such as" are used herein to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
In the present invention, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a and b combination, a and c combination, b and c combination, or a, b and c combination, wherein a, b and c can be single or multiple.
Example 1:
referring to fig. 1 and fig. 2, the present embodiment is configured to provide a multi-cell joint resource allocation method, which takes a primary transmission cell as an execution subject, and includes:
s1: the main transmission cell updates user service data and joint resources in real time, and judges whether the terminal is in a motion state in real time to obtain a first judgment result; the main transmission cell is a cell which is in communication connection with the terminal at present;
specifically, according to the communication progress between a Master Point (MP) and a terminal, the master MP updates user service data in real time. The user service data comprises service scheduling information, a service cache rate and throughput, wherein the throughput refers to the number of successfully transmitted data in unit time. Generally, the service scheduling information in the user service data is updated only when the user initiates new service scheduling information. The terminal reports the main channel measurement information of the main transmission cell to the main transmission cell in real time, and then the main transmission cell obtains the main channel measurement information of the main transmission cell measured by the terminal, wherein the main channel measurement information comprises PMI/CQI/RI information between the terminal and the main transmission cell. And the main transmission cell calculates the joint resources in real time according to the main channel measurement information and the user service data, and further updates the joint resources in real time. The joint resource includes the number of RBs to be allocated, RB position, the number of RIs, a starting subframe of data scheduling, and scheduling duration. And then the main transmission cell can update the user service data and the joint resources in real time and master the conditions of the user service data and the joint resources in real time. And the user service data and the joint resources are transmitted to the cooperative transmission cell, and after the cooperative transmission cell becomes a main transmission cell, the current user service data and the joint resources can be acquired at the first time, so that the subsequent processing is facilitated.
When judging whether the terminal is in a motion state, the embodiment may locate the terminal in real time through the main transmission cell, and if the location information of the terminal changes, the terminal may be considered to be in the motion state.
S2: if the first judgment result is yes, the main transmission cell calculates a predicted space-time trajectory of the terminal in a predicted time period based on the historical space-time trajectory of the terminal, the geographical positions of a plurality of first cells adjacent to the main transmission cell are respectively matched with the predicted space-time trajectory to obtain a matching weight of each first cell, and the plurality of first cells with the matching weights larger than a preset weight value are selected as cooperative transmission cells;
the historical space-time trajectory of the terminal comprises a first space-time trajectory and a second space-time trajectory. The first space-time trajectory is a motion trajectory of the terminal in the historical time period, specifically, the first space-time trajectory includes geographical position information of the terminal changing with time in the historical time period, and the first space-time trajectory may further include a rule that the geographical position of the terminal changes with time in the historical time period. The second space-time trajectory is a motion trajectory of the terminal in the coverage area of the main transmission cell in the historical time period, that is, the second space-time trajectory contains the geographical position information of the terminal in the coverage area of the main transmission cell. And then the change information of the terminal in a certain prediction time period in the future can be accurately predicted based on the historical position change rule and the historical actual motion trail of the terminal.
The allocation method of this embodiment further includes that the primary transmission cell acquires the first space-time trajectory, which specifically includes: and the main transmission cell reports a space-time track request to the network server, wherein the space-time track request comprises the ID of the terminal and request information. And the main transmission cell receives a space-time track response returned by the network server to obtain a first space-time track. The network server can be an MME, and therefore the first space-time track information can be conveniently acquired.
The allocation method of this embodiment further includes that the primary transmission cell acquires a second space-time trajectory, which specifically includes: the main transmission cell locates the terminal in real time to obtain the position information of the terminal in the coverage area of the main transmission cell at each moment, namely the main transmission cell collects the locating signal of the terminal in the coverage area of the main transmission cell. And calculating a second space-time track of the terminal in the coverage area of the main transmission cell according to the position information, and further accurately acquiring second space-time track data according to the positioning signal.
After the first space-time track and the second space-time track are obtained, the main transmission cell predicts a predicted space-time track of the terminal according to the first space-time track and the second space-time track of the terminal and a preset minimum geographical granularity, wherein the predicted space-time track is geographical position change information of the terminal in a prediction time period. The minimum geographic granularity is one of network grids, and the network grid is a two-dimensional map formed by cells and terminals in a preset area.
When a coordinated transmission cell (SP) is obtained, a main transmission cell matches the geographical positions and predicted space-time trajectories of a plurality of first cells adjacent to the main transmission cell, calculates a Matching Weight (MWF) of each first cell, compares the matching weight with a preset matching threshold (i.e., a preset weight), and selects K first cells as coordinated transmission cells, where K is greater than or equal to 0 and is less than or equal to a preset value.
S3: the main transmission cell acquires the time lead and the channel measurement information of each cooperative transmission cell, and a multi-cell joint resource allocation table is constructed based on the predicted space-time trajectory, the matching weight, the time lead and the channel measurement information;
in this embodiment, when obtaining the timing advance, the following steps may be adopted: and the main transmission cell sends a time advance response to each cooperative transmission cell through an interface with the cooperative transmission cell, acquires the time advance of each cooperative transmission cell and further realizes communication between the main transmission cell and the cooperative transmission cell through the interface.
In this embodiment, when acquiring the channel measurement information, the following may be adopted: and the main transmission cell transmits the time advance and the cell ID of each cooperative transmission cell to the terminal and receives the channel measurement information of each cooperative transmission cell measured by the terminal. Specifically, the terminal obtains the channel measurement information of each cooperative transmission cell by measuring the broadcast signal of each cooperative transmission cell. The broadcast signal includes a synchronization reference signal and system information. The channel measurement information may be a channel condition of communication between the cooperative transmission cell and the terminal, and specifically may be an average signal-to-noise ratio or an average channel response amplitude. And then the channel measurement information of the cooperative transmission cell is obtained by using the mode of measuring the broadcast signal by the terminal, and the obtaining mode is flexible.
When constructing the multi-cell joint resource allocation table, the present embodiment may be constructed according to the arrival order of time granularity. If the terminal arrives at a plurality of cooperative distribution cells at the same time granularity, the cooperative distribution cells are sorted by taking the matching weight MWF as a first criterion, or the cooperative distribution cells are sorted by taking the channel measurement information as the first criterion and combining the matching weight.
Please refer to table 1, which shows a schematic diagram of a multi-cell joint resource allocation table. The multi-cell joint resource allocation table contains time granularity sequence numbers 411, 412, 413, and 414, and corresponding geographic granularities 421, 422, 423, and 424. 411 corresponds to two candidate cooperative transmission cells for terminal access, the cooperative transmission cell is represented by a two-dimensional parameter (matching weight, cell ID), the cell IDs of the two cooperative transmission cells are 441 and 442, respectively, the matching weights are 431 and 432, respectively, where 431 is greater than 432.
At time granularity 412, there is a candidate cooperative transmission cell for terminal access, the matching weight of the cooperative transmission cell is 433, and the cell ID is 443.
At time granularity 413, there are two candidate cooperative transmission cells for terminal access, the matching weights of the two candidate cooperative transmission cells are 434 and 435, and the cell IDs are 444 and 445.
At time granularity 414, there is a candidate cooperative transmission cell for terminal access, the matching weight of the cooperative transmission cell is 436, and the cell ID is 446.
As can be seen from table 1, at each time granularity, there is one geographic granularity corresponding to one or more cell IDs and matching weights, and a time granularity corresponds to a plurality of cell IDs indicating that there are a plurality of cells in the vicinity of the geographic granularity at which the terminal may access one of the cells. The cell ID may be a cell ID of an MP or a cell ID of an SP.
TABLE 1
| Number of time granularity | Geographic granularity | SP ranking |
| 411 | 421 | (431，441)，(432，442) |
| 412 | 422 | (433，443) |
| 413 | 423 | (434，444，(435，445) |
| 414 | 424 | (436，446) |
S4: and the main transmission cell sends the multi-cell joint resource allocation table, the user service data and the joint resources to the cooperative transmission cell, and the next cooperative transmission cell in communication connection with the terminal is used as a main transmission cell in the next cycle.
In specific implementation, the main transmission cell may send the multi-cell joint resource allocation table, the user service data, and the joint resources to all the cooperative transmission cells, or only send all the cooperative transmission cells related to the multi-cell joint resource allocation table, so that all the cooperative transmission cells that may be in communication connection with the terminal are prepared for communication in advance, and the wireless resources required for communication with the terminal are reserved.
After the cooperative transmission cell is connected to the terminal, the RRC connection reconfiguration information is sent to the terminal, and the cooperative transmission cell is converted into the primary transmission cell in the next cycle, and the step returns to perform S1.
And if the first judgment result is negative, the main transmission cell communicates with the terminal until the terminal has no communication requirement. And when the terminal does not move, the main transmission cell continuously communicates with the terminal to provide communication service for the terminal.
To further explain the technical solution of the present embodiment, as shown in fig. 3, which shows an application scenario of the allocation method of the present embodiment, the allocation method of the present embodiment may be specifically applied to a multi-cell system transmission system based on OFDM/OFDMA, and includes a first base station 111, a second base station 112, a third base station 113, and a fourth base station 114, a network server 101, and a terminal 110. The first base station 111 is the main transmission cell of the terminal 110, and the second base station 112, the third base station 113 and the fourth base station 114 are the cooperative transmission cells of the terminal 110. Fig. 3 also shows a predicted space-time trajectory 130 of the terminal 110, predicted by the first base station 111. The predicted space-time trajectory 130 indicates that the terminal 110 will enter the coverage areas of the second base station 112, the third base station 113 and the fourth base station 114, respectively, as a function of time.
On the basis of this application scenario, the functions of the respective devices are further explained as follows:
the network server 101 receives the empty track request from the main transmission cell MP, and sends an empty track response to the MP, providing the first empty track of the terminal 110.
The MP collects the positioning signal of the terminal 110, calculates a second space-time trajectory of the terminal 110, and calculates a predicted space-time trajectory 130 of the terminal 110 according to the first space-time trajectory and the second space-time trajectory. Based on the predicted space-time trajectory 130, K coordinated transmission cells SP are selected, time advance requests are sent to the K SPs, time advance responses of the SPs are received, and the time advances of the SPs are obtained. And obtaining a multi-cell joint resource allocation table of the terminal 110 according to the time granularity arrival sequence based on the third space-time trajectory, the matching weight, the time advance and the channel measurement information. And collecting the main channel measurement information reported by the terminal 110, and calculating the joint resources of the terminal 110.
The SP receives the time advance request, feeds back the time advance response, receives the multi-cell joint resource allocation table of the terminal 110, and sends an RRC connection reconfiguration message after being in communication connection with the terminal 110.
The terminal 110 measures the MP channel, measures the broadcast signal of the SP, obtains and reports the main channel measurement information and the SP channel measurement information to the MP, and sends the positioning signal of the terminal 110.
Compared with the prior art, the embodiment provides a terminal position self-adaptive multi-cell joint resource allocation method aiming at communication requirements under dense networking, and performs multi-cell joint resource allocation according to terminal position change and channel conditions between a terminal and a plurality of cells, so that the data transmission efficiency of the terminal during switching among the plurality of cells is improved.
Example 2:
the embodiment of the present invention may perform the division of the functional modules according to the method example in embodiment 1, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, the division of the modules in the embodiment of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation.
In the case of adopting each functional module divided corresponding to each function, please refer to fig. 4, this embodiment is configured to provide a multi-cell joint resource allocation system, including:
a judging module M1, configured to enable the primary transmission cell to update user service data and joint resources in real time, and judge whether the terminal is in a motion state in real time to obtain a first judgment result; the main transmission cell is a cell which is in communication connection with the terminal at present;
a selecting module M2, configured to, if the first determination result is yes, calculate, by the primary transmission cell, a predicted space-time trajectory of the terminal within a predicted time period based on a historical space-time trajectory of the terminal, match geographic positions of a plurality of first cells adjacent to the primary transmission cell with the predicted space-time trajectory, respectively, to obtain a matching weight of each first cell, and select, as a cooperative transmission cell, the plurality of first cells whose matching weights are greater than a preset weight;
a constructing module M3, configured to enable the primary transmission cell to obtain a time advance and channel measurement information of each cooperative transmission cell, and construct a multi-cell joint resource allocation table based on the predicted space-time trajectory, the matching weight, the time advance, and the channel measurement information;
a returning module M4, configured to enable the primary transmission cell to send the multi-cell joint resource allocation table, the user service data, and the joint resource to the cooperative transmission cell, and use a next cooperative transmission cell in communication connection with the terminal as a primary transmission cell in a next cycle.
Besides the above method for dividing the function modules, this embodiment also provides a dividing method, and the system obtained by dividing includes:
the positioning signal collection module is used for receiving a positioning signal sent by a terminal;
the measurement information collection module is used for receiving the main channel measurement information sent by the terminal and the channel measurement information of the cooperative transmission cell;
the upper network interface module is used for sending a space-time track request to the network server and receiving a space-time track response sent by the network server;
the adjacent node interface module is used for sending a time advance request to each cooperative transmission cell, receiving a time advance response of the cooperative transmission cell and sending a multi-cell joint resource allocation table to the cooperative transmission cell;
the space-time track measuring and calculating module is used for analyzing the first space-time track, calculating the second space-time track and calculating the predicted space-time track;
the cooperative management module is used for selecting a cooperative transmission cell and generating a multi-cell joint resource allocation table;
and the resource management module is used for updating the user service data and the combined resource.
All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.
Compared with the prior art, the embodiment provides a terminal position self-adaptive multi-cell joint resource allocation system aiming at communication requirements under dense networking, and performs multi-cell joint resource allocation according to terminal position change and channel conditions between a terminal and multiple cells, so that the data transmission efficiency of the terminal during switching among the multiple cells is improved.
While the invention has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.
While the invention has been described in conjunction with specific features and embodiments thereof, it will be evident that various modifications and combinations can be made thereto without departing from the spirit and scope of the invention. Accordingly, the specification and figures are merely exemplary of the invention as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the invention. It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A multi-cell joint resource allocation method is characterized by comprising the following steps:
the main transmission cell updates user service data and joint resources in real time, and judges whether the terminal is in a motion state in real time to obtain a first judgment result; the main transmission cell is a cell which is in communication connection with the terminal at present;
if the first judgment result is yes, the main transmission cell calculates a predicted space-time trajectory of the terminal in a predicted time period based on the historical space-time trajectory of the terminal, the geographical positions of a plurality of first cells adjacent to the main transmission cell are respectively matched with the predicted space-time trajectory to obtain a matching weight of each first cell, and the plurality of first cells with the matching weights larger than a preset weight value are selected as cooperative transmission cells;
the main transmission cell acquires the time lead and the channel measurement information of each cooperative transmission cell, and a multi-cell joint resource allocation table is constructed based on the predicted space-time trajectory, the matching weight, the time lead and the channel measurement information;
and the main transmission cell sends the multi-cell joint resource allocation table, the user service data and the joint resources to the cooperative transmission cell, and the next cooperative transmission cell in communication connection with the terminal is used as a main transmission cell in the next cycle.
2. The allocation method according to claim 1, wherein the updating, in real time, the user service data and the joint resource by the primary transmission cell specifically comprises:
according to the communication progress between a main transmission cell and a terminal, the main transmission cell updates user service data in real time; the user service data comprises service scheduling information, service cache rate and throughput;
the main transmission cell acquires main channel measurement information of the main transmission cell measured by the terminal;
the main transmission cell calculates joint resources in real time according to the main channel measurement information and the user service data; the joint resource comprises the number of RBs to be allocated, the position of the RBs, the number of RI, a starting subframe of data scheduling and scheduling duration.
3. The allocation method according to claim 1, wherein the historical space-time trajectory of the terminal includes a first space-time trajectory and a second space-time trajectory; the first space-time trajectory is a motion trajectory of the terminal in a historical time period, and the second space-time trajectory is a motion trajectory of the terminal in a coverage area of the main transmission cell in the historical time period.
4. The allocation method according to claim 3, wherein the allocation method further includes the primary transmission cell acquiring a first space-time trajectory, specifically including:
the main transmission cell reports a space-time track request to a network server; the space-time track request comprises an ID (identity) and request information of the terminal;
and the main transmission cell receives a space-time track response returned by the network server to obtain a first space-time track.
5. The allocation method according to claim 3, wherein the allocation method further includes the primary transmission cell acquiring a second space-time trajectory, specifically including:
the main transmission cell positions the terminal in real time to obtain the position information of the terminal in the coverage area of the main transmission cell at each moment;
and calculating a second space-time track of the terminal according to the position information.
6. The allocation method according to claim 1, wherein the acquiring, by the primary transmission cell, the timing advance of each of the cooperative transmission cells specifically comprises:
and the main transmission cell sends a time advance response to each cooperative transmission cell through an interface of the cooperative transmission cell to acquire the time advance of each cooperative transmission cell.
7. The allocation method according to claim 6, wherein the acquiring, by the primary transmission cell, the channel measurement information of each of the cooperative transmission cells specifically comprises:
and the main transmission cell transmits the time advance and the cell ID of each cooperative transmission cell to the terminal and receives the channel measurement information of each cooperative transmission cell measured by the terminal.
8. The allocation method according to claim 7, wherein the terminal obtains the channel measurement information of each of the cooperative transmission cells by measuring the broadcast signal of each of the cooperative transmission cells; the broadcast signal includes a synchronization reference signal and system information.
9. The allocation method according to claim 2, wherein said primary channel measurement information comprises PMI/CQI/RI information between said terminal and said primary transmission cell.
10. A multi-cell joint resource allocation system, comprising:
the judging module is used for enabling the main transmission cell to update user service data and joint resources in real time and judging whether the terminal is in a motion state in real time to obtain a first judging result; the main transmission cell is a cell which is in communication connection with the terminal at present;
a selecting module, configured to calculate, by the primary transmission cell, a predicted space-time trajectory of the terminal within a predicted time period based on a historical space-time trajectory of the terminal if the first determination result is yes, match geographical positions of a plurality of first cells adjacent to the primary transmission cell with the predicted space-time trajectory, respectively, to obtain a matching weight of each first cell, and select, as a cooperative transmission cell, the plurality of first cells whose matching weights are greater than a preset weight;
a building module, configured to enable the primary transmission cell to obtain a time advance and channel measurement information of each cooperative transmission cell, and build a multi-cell joint resource allocation table based on the predicted space-time trajectory, the matching weight, the time advance, and the channel measurement information;
and a returning module, configured to enable the primary transmission cell to send the multi-cell joint resource allocation table, the user service data, and the joint resource to the cooperative transmission cell, and use a next cooperative transmission cell in communication connection with the terminal as a primary transmission cell in a next cycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110935338.6A CN113645704A (en) | 2021-08-16 | 2021-08-16 | Multi-cell joint resource allocation method and system |
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