WO2020043166A1

WO2020043166A1 - Method and device for constructing comp set

Info

Publication number: WO2020043166A1
Application number: PCT/CN2019/103318
Authority: WO
Inventors: 王家恒; 马路娟; 郭徽; 彭潜; 胡征宇
Original assignee: 海信集团有限公司
Priority date: 2018-08-30
Filing date: 2019-08-29
Publication date: 2020-03-05
Also published as: CN110876153A; CN110876153B

Abstract

The present application relates to the technical field of communications and specifically relates to a method and device for constructing a CoMP set, comprising: a terminal generates, by measuring the strength of a signal, a candidate set comprising multiple base stations; the terminal transmits a request for joining a CoMP set to at least one base station in the candidate set; and the terminal selects and joins to the CoMP set at least one base station among the base stations from which an agreement to join the CoMP set is returned. The base stations receive the request to join the CoMP set transmitted by the terminal; and the base stations, when determined to join the CoMP set, notify the terminal of the agreement to join the CoMP set.

Description

Method and equipment for constructing CoMP set

Cross-reference to related applications

This application claims priority from a Chinese patent application filed on August 30, 2018 with the Chinese Patent Office, application number 201811006120.7, and application name "A Method and Equipment for Constructing a CoMP Collection", the entire contents of which are incorporated herein by reference. Applying.

Technical field

The present application relates to the field of communication technologies, and in particular, to a method and device for constructing a CoMP set.

Background technique

As the density of the fifth-generation mobile communication technology (5-Generation, 5G) network deployment nodes and antenna arrays has increased sharply, the ultra-dense of 5G networks improves the quality of system communication services while providing coordinated multiple points (CoMP) ) Technology brings a series of problems. On the one hand, the scarcity of spectrum resources makes interference in the ultra-dense wireless network CoMP technology unavoidable; on the other hand, the denseness of 5G networks brings complex resource competition between base stations / terminals, which makes CoMP technology need efficient cooperation areas Distribution plan.

Existing communication systems already have many methods to deal with the issue of CoMP set construction. In recent years, companies have also continuously proposed new CoMP proposals at 5G standardization meetings. The existing CoMP set construction technology has two mainstream proposals in the first phase (Rel-15), namely, the allocation of CoMP collaboration area and adaptive collaboration area allocation based on X2 interface characteristics. The scheme of allocating CoMP cooperation areas based on the characteristics of the X2 interface is sensitive to delay. If the information exchange between base stations has a large delay, it will greatly affect the system performance. The scheme of adaptive cooperation area allocation cannot quickly obtain the CoMP set for the movement of terminals. The construction solution can not respond to the movement of the terminal in time.

In summary, the current method of constructing a CoMP set will have a large impact on system performance when the information exchange delay between base stations is large, and it cannot respond to terminal movement in a timely manner.

Summary of the Invention

This application provides a method and a device for constructing a CoMP set, which are used to solve the problem that when the information exchange between base stations has a large time delay in the existing CoMP construction technology, the system performance is greatly affected, and the mobile terminal cannot respond to the mobile terminal in time. problem.

In a first aspect, a method for constructing a CoMP set provided by an embodiment of the present application includes:

The terminal generates a candidate set including at least two base stations according to the signal strength with the base station; the terminal sends a CoMP set join request to the base stations in the candidate set; and the terminal sets the candidate set according to the information returned by the base station The base station in is added to the CoMP set.

In a second aspect, a method for constructing a CoMP set provided in an embodiment of the present application includes:

The base station receives a CoMP set join request sent by the terminal; the base station determines whether to join the CoMP set; the base station notifies the terminal to agree to join the CoMP set after determining to join the CoMP set.

In a third aspect, an embodiment of the present application further provides a device for constructing a CoMP set. The device includes a processing module, a sending module, and an operation module:

A processing module, configured to generate a candidate set including at least two base stations according to a signal strength with the base station;

A sending module, configured to send a CoMP set join request to a base station in the candidate set;

An operation module is configured to add the base stations in the candidate set to the CoMP set according to the information returned by the base stations.

In a fourth aspect, an embodiment of the present application further provides a device for constructing a CoMP set. The device includes a receiving module, a processing module, and a transmission module:

A receiving module, configured to receive a CoMP set join request sent by a terminal;

A processing module for determining whether to join a CoMP set;

A transmission module, configured to notify the terminal to agree to join the CoMP set after determining to join the CoMP set.

In a fifth aspect, an embodiment of the present application further provides a device for constructing a CoMP set. The device includes a memory and a processor, wherein the memory stores computer instructions, and the computer instructions are implemented when the processor executes:

Generating a candidate set including at least two base stations according to the signal strength with the base station;

Sending a CoMP set join request to a base station in the candidate set;

Add the base stations in the candidate set to the CoMP set according to the information returned by the base stations.

According to a sixth aspect, an embodiment of the present application further provides a device for constructing a CoMP set. The device includes a memory and a processor, wherein the memory stores computer instructions, and the computer instructions are implemented when the processor executes:

Receiving a CoMP set join request sent by a terminal;

Determine whether to join the CoMP set;

After determining to join the CoMP set, the terminal is notified to agree to join the CoMP set.

In a seventh aspect, an embodiment of the present application further provides a computer-readable non-volatile storage medium on which a computer program is stored, and when the program is executed by a processor, implements the steps of the method according to any one of the first aspects.

In an eighth aspect, an embodiment of the present application further provides a computer-readable non-volatile storage medium on which a computer program is stored, and when the program is executed by a processor, the steps of the method according to any one of the second aspects are implemented.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to explain the technical solutions in the embodiments of the present application more clearly, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. Those of ordinary skill in the art can obtain other drawings according to these drawings without paying creative labor.

FIG. 1 is a schematic structural diagram of a system for constructing a CoMP set according to an embodiment of the present application; FIG.

FIG. 2A is a schematic diagram of a constructed CoMP list provided by an embodiment of the present application; FIG.

FIG. 2B is a schematic diagram of a terminal sending a CoMP set join request to multiple base stations in a candidate list simultaneously according to an embodiment of the present application;

2C is a schematic diagram of multiple base stations in a candidate list joining a CoMP set according to an embodiment of the present application;

3 is a schematic structural diagram of a first terminal according to an embodiment of the present application;

4 is a schematic structural diagram of a base station according to an embodiment of the present application;

5 is a schematic structural diagram of a second terminal provided by an embodiment of the present application;

6 is a schematic flowchart of a method on a terminal side in a method for constructing a CoMP set according to an embodiment of the present application;

7 is a schematic flowchart of a method on a base station side in a method for constructing a CoMP set according to an embodiment of the present application;

8 is a schematic flowchart of a method for constructing a CoMP set according to an embodiment of the present application;

9 is a schematic structural diagram of a device for constructing a CoMP set according to an embodiment of the present application;

FIG. 10 is a schematic structural diagram of another device for constructing a CoMP set according to an embodiment of the present application.

detailed description

In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. . Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

Here are some words that appear in the text:

1. The "terminals" referred to in the embodiments of the present application are mobile phones, tablets, computers, and the like.

2. The "base station" referred to in the embodiments of the present application refers to a public mobile communication base station, which is a form of radio station. It refers to the communication between a mobile communication terminal and a mobile phone terminal in a certain radio coverage area. Radio transmitting and receiving station for information transmission.

3. The "signal strength" referred to in the embodiments of the present application refers to the signal strength of signals transmitted by each base station at the terminal.

4. The term "and / or" in the embodiments of the present application describes the association relationship between related objects, and indicates that there can be three kinds of relationships, for example, A and / or B can mean: A exists alone, A and B exist simultaneously, alone There are three cases of B. The character "/" generally indicates that the related objects are an "or" relationship.

5. The "fairness index" in the embodiment of the present application is used for fairness considerations when the base station provides wireless transmission service for a certain terminal, not to distribute communication resources evenly, but to ensure that the connection between the terminal and the base station has more advantages. Avoid resource shortage or waste due to unfair connection between the terminal and the base station.

The embodiments of the present application are described in further detail below with reference to the accompanying drawings.

As shown in FIG. 1, the system for constructing a CoMP set in the embodiment of the present application includes a terminal 10 and a base station 20.

The terminal 10 is configured to generate a candidate set including at least two base stations according to the signal strength with the base station; send a CoMP set join request to the base stations in the candidate set; and, according to the information returned by the base station, The base station is added to the CoMP set.

The base station 20 is configured to receive a CoMP set join request sent by the terminal; determine whether to join the CoMP set; and notify the terminal to agree to join the CoMP set after determining to join the CoMP set.

In the embodiment of the present application, the terminal generates a candidate set including at least two base stations by measuring the signal strength and sends a CoMP set join request to the base station in the candidate set. The base station determines whether the CoMP set join request sent by the terminal is received. After joining the CoMP set, after determining to join the CoMP set, the terminal is notified to agree to join the CoMP set, and the terminal selects a base station to join the CoMP set from the base stations returning to agree to join the CoMP set. Since there is no interaction between the base station and the base station in the embodiment of the present application, and the construction of the CoMP set depends on the request and reply between the base station and the terminal for decision, the interaction between the terminal and the base station only includes request and reply information, and the signaling is extremely short. It reduces signaling complexity while reducing system complexity.

In the embodiment of the present application, the terminal generates a candidate set including multiple base stations by measuring signal strength.

The signal strength may be determined by the received power and / or signal noise.

The form of the candidate set includes, but is not limited to, part or all of the following modes:

List, array, stack, queue.

Take the terminal's measurement of received power as an example for illustration. As shown in FIG. 2A, the terminal measures the received power of the channel state information reference signal transmitted by the base station at the terminal, and adds the base station whose received power is greater than the first threshold to the candidate list.

Suppose, a first threshold value set in the terminal u _j minimum unlimited communication service reception power threshold value p-TH _j, p _ij is the received power of a signal the base station BS _i transmitted terminal u _j, and by measuring the channel state information reference signal The received power is obtained.

Specifically, after receiving the channel state information reference signal transmitted by each base station, the terminal u _j measures the received power of each base station signal at the terminal u _j . If the received power p _{ij is} greater than the received power threshold p- of the minimum infinite communication service of the terminal u _j TH _j , that is, p _ij > p-TH _j , represents that the base station BS _i can join the candidate list of the terminal u _j .

Assume that the received power of each base station signal at the terminal u _j is:

p _1j ＞ p _2j ＞ p _3j ＞… ＞ p _{L (j) j} ＞ p-TH _j ＞ p _{L (j) + 1, j} ＞…

The first L may be added to the list of candidate base stations u _j of the terminal.

The base stations that can be added to the candidate set can be sorted or not sorted when added to the candidate set. In some embodiments of the present application, the sorting may be performed in ascending or descending order.

The terminal arranges the first L base stations according to the received power from large to small to generate the candidate list shown in FIG. 2A.

Taking the terminal's measurement of received power as an example, the candidate sets generated by different terminals are generally different for each terminal. Each time a candidate set is generated, the received power of each base station needs to be compared with a set first threshold. In some embodiments, the received power of each base station may be quantized in advance, and when generating the candidate set, it is directly determined whether the base station joins the candidate set according to the quantization result.

In some embodiments of the present application, the received power of each base station can be quantified according to the priority index. It is assumed that the priority index function of the i-th base station BS _i at the j-th terminal u _j can be expressed as:

PI _j (BS _i ) = p _ij

Where p _ij is the received power of the channel state information reference signal transmitted by the base station BS _i at the terminal u _j .

In the embodiment of the present application, after generating the candidate set, the terminal sends a CoMP set joining request to at least one base station in the candidate set. The larger the number of base stations in the CoMP set, the more base stations serve the same terminal, and the performance gain is greater, but at the same time consumes more resources. Conversely, the smaller the number of base stations in the CoMP set, the The smaller the number of base stations served by the same terminal, the lower the consumption of resources, but at the same time the performance gain decreases.

In some embodiments of the present application, the terminal may set a suitable preset number for the number of base stations in the CoMP set. When the number of base stations in the CoMP set reaches the preset number, the CoMP set is full and the terminal completes the construction of the CoMP set. . When the number of all base stations responding to the consent request of the terminal is less than the preset number of base stations in the CoMP set of the terminal, the preset number of base stations in the CoMP set needs to be adjusted.

U _j is assumed that the terminal vacancies CoMP set number of e-CoMP (j), when a preset number of terminals all numbers u _j is smaller than the base stations respond to accede to the request of the terminal u _j CoMP set number of base stations, i.e. not sufficient to fill CoMP At the time of assembly, it is considered that the CoMP set of the terminal u _j can no longer be filled.

e-CoMP (j) = 0

When e-CoMP (j) = 0, the terminal u _j determines that the number of base stations in the CoMP set reaches a preset number; otherwise, it is considered that the number of base stations in the CoMP set of the terminal u _j has not reached the preset number.

The manner in which the terminal sends the CoMP set join request to the base station in the candidate set includes unequal feedback sending and equal feedback sending.

Sending method 1: Sending feedback without waiting.

Specifically, when the number of base stations in the CoMP set does not reach the preset number, the terminal sends a CoMP set join request to N base stations in the candidate set that have not yet sent a CoMP set join request. The terminal does not need to wait after sending the CoMP set request to the base station. The feedback information that the base station agrees to join or refuses to join may continue to send the CoMP set join request to the base station in the candidate set that has not yet sent the CoMP set join request.

There are two ways for the terminal to send a CoMP set join request to N base stations in the candidate set: parallel sending and serial sending.

Method 1. Parallel transmission, that is, the terminal sends a CoMP set join request to N base stations in the candidate set at the same time.

To generate a candidate list as an example, shown in Figure 2B, terminal u _j in the candidate list to the base station _{_{3: BS 1, BS 2, BS}} 3 was added simultaneously transmitting request CoMP set.

There are many cases when a terminal sends a CoMP set join request to N base stations in the candidate set at the same time, and the following are listed below.

(1) The terminal sends a CoMP set join request to all remaining base stations in the candidate set at the same time.

Assume that the preset number of base stations in the CoMP set of the terminal u _j is 10, the number of base stations that have been added to the CoMP set is 4, and another 6 base stations need to be added, and the base stations in the candidate set that have not yet sent a CoMP set join request The number is 7. The terminal u _j sends a CoMP set join request to the remaining 7 base stations in the candidate set at the same time.

If all 7 base stations respond to the consent request, the terminal u _j selects 6 base stations from the 7 base stations to join the CoMP set. If only 5 of the 7 base stations respond to the consent request, the terminal then adds all 5 base stations to the CoMP set and updates the preset number of CoMP sets.

(2) The terminal selects several base stations in the candidate set, and sends a CoMP set join request to the selected base stations at the same time.

Assume that the preset number of base stations in the CoMP set of the terminal u _j is 10, the number of base stations that have been added to the CoMP set is 4, and another 6 base stations need to be added, and the base stations in the candidate set that have not yet sent a CoMP set join request The number is 7. At this time, the terminal u _j selects 6 base stations in the candidate set and sends a CoMP set join request to the 6 base stations at the same time. If all 6 base stations agree to join the CoMP set of the terminal u _j , the terminal determines that the CoMP set is constructed, otherwise, the terminal updates the preset number of CoMP sets.

In the above method, the terminal does not need to wait for the feedback information of the base station, but directly sends the CoMP set to the base stations in the candidate set. In this way, the CoMP set is constructed with high efficiency and high speed, but it will waste some base station resources in the candidate set.

Method 2: Serial transmission, that is, the terminal sends a CoMP set join request to N base stations in the candidate set one by one.

The sequence in which the terminal sends the CoMP set join request to the base stations in the candidate set one by one can be various, and the following are listed below.

Order one: Send them in order according to the order in the candidate set.

Assume that the base stations that have not yet sent a CoMP set join request among the candidate sets sorted by signal strength are base station 1, base station 2, base station 3, and the number of empty CoMP sets for terminal u _j is 3. At this time, the terminal is based on the candidate set. The CoMP set join request is sent to base station 1, base station 2, and base station 3 in sequence. After each base station responds to terminal u _j , it sends a CoMP set join request to the next base station. If base station 2, base station 3 agrees to join terminal u _j CoMP set, the base station refuses to accede to the terminal 1 u _j CoMP set, updating the CoMP set preset number is 2.

The second order is not randomly sent according to the order in the candidate set.

Assume that the base stations that have not yet sent CoMP set join requests among the candidate sets sorted by signal strength are base station 1, base station 2, base station 3, and the number of empty CoMP sets of terminal u _j is 2. At this time, the terminal may not The candidate set is sorted by first sending a CoMP set join request to base station 2. After base station 2 replies to the CoMP set agreeing to join terminal u _j , it sends a CoMP set join request to base station 1. If base station 1 agrees to join the CoMP set of terminal u _j , The terminal u _j determines to complete the construction of the CoMP set; otherwise, the terminal u _j sends a CoMP set joining request to the base station 3.

Sending method 2: Wait for feedback before sending.

Specifically, when the number of base stations in the CoMP set does not reach the preset number, the terminal sends a CoMP set join request to a base station in the candidate set that has not yet sent a CoMP set join request, and sends a CoMP set join request to only one of the base stations at a time. After the base station feeds back to the terminal information for determining whether to join or refuse to join, it is then determined whether to send a CoMP set join request to the next base station.

In the above method, the terminal needs to wait for the feedback information of the base station after sending the CoMP set join request to the base stations in the candidate set, and then determines whether the base station joins the CoMP set according to the feedback information before continuing to send the CoMP set join request. In this way, the CoMP set is constructed. The speed will slow down but the base station resources in the candidate set are fully utilized.

In some embodiments of the present application, a candidate pointer may be set in advance. When the terminal sends a CoMP set join request to a base station in the candidate set, the pointer points to the next base station in the candidate set that has not yet sent a CoMP set join request.

To generate a candidate list as an example, shown in Figure 2C, Pt (u _j) u _j is the pointer to the candidate terminal, terminal u point to the next base station has not transmitted a request to join in the CoMP set _j candidate list. Initially, the CoMP set is empty, pt (u _j ) points to the first base station BS _{1 in the} candidate list, the maximum number of base stations in the CoMP set is q (j), and the candidate list length of terminal u _j is L (j), Then e-CoMP (j) = q (j) and cd (j) = L (j), when the number of base stations of the terminal in the CoMP set does not reach the preset number, the min of the CoMP set joining request has not been sent to the candidate list. {e-CoMP (j), cd (j)} base stations send CoMP set join requests, where e-CoMP (j) is the number of empty CoMP sets of terminal u _j , and cd (j) is the candidate list of terminal u _j The number of base stations that have not sent a CoMP set join request.

Among them, min {e-CoMP (j), cd (j)} takes the value of e-CoMP (j) or cd (j).

(1) The value of min {e-CoMP (j), cd (j)} is e-CoMP (j).

If the number of empty CoMP sets of terminal u _j is less than or equal to the number of base stations in the candidate list of terminal u _j that have not yet sent a CoMP set join request, that is:

e-CoMP (j) ≤cd (j)

Then, the terminal u _j sends a CoMP set join request to the base stations pointed to by the candidate pointer pt (u _j ) and the base stations that follow e-CoMP (j).

Assume that the full number of CoMP sets of terminal u _j is 20, the current empty number of CoMP sets is 5, and the number of base stations in terminal u _j 's candidate list that have not yet sent a CoMP set join request is 6, then terminal u _j sends a candidate list to the candidate list. The five base stations that have not yet sent a CoMP set join request send a CoMP set join request.

(2) The value of min {e-CoMP (j), cd (j)} is cd (j).

If the number of empty CoMP sets of terminal u _j is greater than the number of base stations in the candidate list that have not yet sent CoMP set join requests, that is:

e-CoMP (j) ＞ cd (j)

Then the base station in the candidate list of the terminal u _j that has not yet sent a CoMP set join request cannot make the CoMP set full even if all the base stations have joined the CoMP set. Therefore, the terminal u _j sends CoMP to the remaining cd (j) base stations that have not yet sent a CoMP set join request. Collection join request.

Assume that the full number of CoMP sets of terminal u _j is 20, the current empty number of CoMP sets is 6, and the number of base stations in terminal u _j 's candidate list that have not yet sent a CoMP set join request is 4, then terminal u _j according to the candidate list The four base stations that have not yet sent the CoMP set join request to the candidate list send the CoMP set join request in order.

In order to improve the utilization rate of the base stations in the CoMP set, after the base station receives the CoMP set join request sent by the terminal, it can determine whether to join the CoMP set according to the fairness index. The fairness index may include, but is not limited to, some or all of the following: the terminal's performance parameters and priorities.

The following describes the content of judging whether to join the CoMP set by taking terminal performance parameters and priorities as examples.

In solution 1, the performance parameter of the terminal may be received power or transmission rate.

1. The performance parameter of the terminal is the received power of the reference signal sent by the terminal at the base station;

According to the reference signal terminal u _j is the received power pu base station BS _i is _ji is determined whether the base station is added CoMP set, if the terminal u _j of the reference signal received power pu _ji in the base station BS _i is greater than the power threshold, then added CoMP set; otherwise, Do not join the CoMP collection.

In the above method, the CoMP set join request sent by the terminal u _j to the base station BS _i only includes the received power pu _ji of the reference signal of the terminal u _j at the base station BS _i , and no additional information is required, which reduces the signaling interaction delay and reduces The complexity of the system.

2. The performance parameter of the terminal is the transmission rate requested by the terminal;

A reference signal based on the transmission rate of terminal u _j _j determines whether a base station added to Ru CoMP set, if the transmission rate of the terminal reference signal u _j _j Ru is greater than the rate threshold, then added CoMP set; otherwise, without the addition of CoMP set.

In the above method, the CoMP set join request sent by the terminal u _j to the base station BS _i includes the transmission rate ru _j of the reference signal of the terminal u _j without additional information, which reduces the signaling interaction delay and the system complexity.

In the second solution, the priority is the communication priority of the terminal in the communication operator.

Terminal operators may have provided in the communication carrier's communication priorities, communication terminal u _j higher priority, the establishment of an advantage between the terminal and base station connection, which can improve resource utilization.

Determine whether the base station joins the CoMP set according to the communication priority of the terminal at the communication operator. If the communication priority of the terminal at the communication operator is greater than the priority threshold, it joins the CoMP set; otherwise, it does not join the CoMP set.

In implementation, judging whether the base station joins the CoMP set according to the terminal's performance parameters and / or priorities makes the establishment of the connection between the terminal and the base station more advantageous, guarantees the fairness of the connection between the terminal and the base station, and avoids Fair connections lead to scarce resources or wasted resources.

In the above method, by generating a fairness index and judging whether the base station joins the CoMP set according to the fairness index, when the connection degree of surrounding terminals is complicated, the base station resources in the constructed CoMP set are more effective.

In the embodiment of the present application, the base station determines whether the fairness index is greater than the index threshold; if so, the base station determines to join the CoMP set and notifies the terminal to agree to join the CoMP set; otherwise, the base station determines not to join the CoMP set and notifies The terminal refuses to join the CoMP set.

Assume that the base station BS _i calculates the fairness index of the terminal u _j as FI _i (u _j ), and its own fairness index threshold is FI-TH _i :

If FI _i (u _j ) ≥FI-TH _i , the base station BS _i determines to join the CoMP set, and notifies the terminal u _{j of} agreeing to join the CoMP set; otherwise, the base station BS _i determines not to join the CoMP set, and notifies the terminal u _{j of} refusing to join the CoMP set. .

In the embodiment of the present application, after the terminal selects at least one base station from the base stations that have returned to agree to join the CoMP set to join the CoMP set, it needs to determine whether the number of base stations in the CoMP set reaches a preset number to determine whether to continue to the candidate set. The base station in the network sends a CoMP set join request.

If so, the terminal finishes building the CoMP set; otherwise, the terminal continues to send a CoMP set join request to the base station in the candidate list.

In the embodiment of the present application, after the terminal selects at least one base station from the base stations that return to join the CoMP set to join the CoMP set, the terminal deletes the base stations added to the CoMP set and the base stations that refuse to join the CoMP set from the candidate set.

Suppose there ck (j) base stations to the terminals u _j reply to grant the request, then the reply ck (j) approve the request of a base station number is added to the terminal u _j CoMP set, represent this ck (j) base stations added to terminal u The CoMP set of _j is then deleted from the candidate set. The base station that responds to the rejection request directly deletes this base station from the candidate set without changing the CoMP set of terminal u _j .

In some embodiments of the present application, the terminal may also directly delete the base station that sends the CoMP set join request from the candidate set after sending the CoMP set join request to the base stations in the candidate set, without waiting for the base station to respond to the request. In this case, signaling interaction between the base station and the terminal can be reduced, and signaling overhead can be reduced.

When the terminal moves, it is necessary to determine whether the CoMP set needs to be updated, but the determination process is more complicated. New functional units such as CAMF (Coordination Area Management Function) must be used to collect base station and terminal information to determine whether the CoMP set needs to be updated. In the embodiment of the present application, a decision can be made based on signal strength, and no new functional unit such as CAMF is required.

In implementation, the terminal selects at least one base station from the base stations that have returned to agree to join the CoMP set to join the CoMP set, and further needs to determine whether the number of special base stations in the CoMP set reaches a set second threshold.

There are many types of determination methods for the special base station, and several are listed below:

Judgment Method 1: Determine whether the signal strength of the base stations in the CoMP set is less than the minimum signal strength of the base stations in the candidate set.

If the signal strength of the base station in the CoMP set is less than the minimum signal strength of the base station in the candidate set, and the difference reaches a third threshold, the base station is a special base station; otherwise, the base station is not a special base station.

Judgment method 2: Determine whether the signal strength of the base station in the CoMP set is less than the signal strength threshold.

A signal strength threshold may be set in advance to determine whether the signal strength of the base station in the CoMP set is less than the threshold. If it is, the base station is a special base station; otherwise, the base station is not a special base station.

In the above method, a threshold is set in advance, and a special base station is determined by judging the relationship between the threshold and the signal strength. Due to the limitation of the special base station, the CoMP set is not updated for small-scale movement of the terminal, which improves the construction efficiency of the CoMP set. .

Specifically, after the terminal selects at least one base station from the base stations that have returned to agree to join the CoMP set to join the CoMP set, it needs to determine whether the number of special base stations in the CoMP set reaches a set second threshold, and if so, the terminal is emptied. CoMP set; otherwise, the terminal determines whether the number of base stations in the CoMP set reaches a preset number.

In the case where the spatial position of the terminal and the channel state do not change much, the CoMP set does not change after the completion. If a large change occurs, that is, the signal strength of some base stations in the CoMP set is much smaller than the signal strength of the base stations in the candidate set, that is, the number of special base stations reaches a set second threshold, the CoMP set is cleared, the candidate set is refreshed, and the CoMP set is rebuilt . In this way, the CoMP set can be updated in time, and when the terminal moves, its CoMP set is also updated, which can cope with the movement of the terminal.

In some embodiments of the present application, when the number of special base stations does not reach the set second threshold, the terminal needs to determine whether the number of base stations in the CoMP set reaches a preset number, and if so, the terminal completes the construction of the CoMP set; otherwise , The terminal continues to send a CoMP set join request to at least one base station in the candidate set.

As shown in FIG. 3, an embodiment of the present application provides another terminal for constructing a CoMP set, which includes a processing module 300, a sending module 301, and an operation module 302:

A processing module 300, configured to generate a candidate set including at least two base stations according to a signal strength with the base station;

A sending module 301, configured to send a CoMP set join request to a base station in the candidate set;

The operation module 302 is configured to add the base stations in the candidate set to the CoMP set according to the information returned by the base stations.

In some embodiments of the present application, the processing module 300 is configured to:

Sending a CoMP set join request to multiple base stations in the candidate set;

When the base stations in the candidate set are added to the CoMP set according to the information returned by the base stations, if the number of returned base stations that agree to join is greater than N, then N base stations are selected to be added to the CoMP set from the returned base stations that agree to join, where N is the difference between the maximum number of base stations in the CoMP set and the number of base stations that have joined the CoMP set; or if the number of base stations that agree to join is not greater than N, the base stations that return to join are added to the CoMP set.

Select the first N base stations in descending order of signal strength, where N is the difference between the maximum number of base stations in the CoMP set and the number of base stations that have joined the CoMP set;

Send a CoMP set join request to the selected base station.

In some embodiments of the present application, the processing module 300 is further configured to:

If the signal strength in the CoMP set is less than the minimum signal strength of the base stations in the candidate set, and the number of base stations whose difference reaches a third threshold reaches a set second threshold, the CoMP set is cleared; or;

If the number of base stations in the CoMP set is less than the minimum value and the number of base stations whose difference reaches the third threshold reaches the set second threshold, the CoMP set is cleared.

As shown in FIG. 4, an embodiment of the present application provides another base station for constructing a CoMP set, including a receiving module 400, a processing module 401, and a transmission module 402.

A receiving module 400, configured to receive a CoMP set join request sent by a terminal;

A processing module 401, configured to determine whether to join a CoMP set;

The transmission module 402 is configured to notify the terminal to agree to join the CoMP set after determining to join the CoMP set.

In some embodiments of the present application, the processing module 401 is configured to:

Determine whether to join the CoMP set of the terminal according to the terminal's performance parameters and / or priorities.

Based on the same concept, this embodiment of the present application provides another terminal for constructing a CoMP set. As shown in FIG. 5, the terminal 500 includes: a radio frequency (RF) circuit 510, a processor 520, and a memory 530. Those skilled in the art can understand that the structure of the terminal shown in FIG. 5 does not constitute a limitation on the terminal, and the terminal provided in the embodiment of the present application may include more or fewer components than shown in the figure, or combine some components, Or different component arrangements.

Each component of the terminal 500 is specifically described below with reference to FIG. 5:

The RF circuit 510 may be used for receiving and sending data during communication or conversation. Specifically, after receiving the downlink data of the base station, the RF circuit 510 is sent to the processor 520 for processing; in addition, the uplink data to be sent is sent to the base station. Generally, the RF circuit 510 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like.

In addition, the RF circuit 510 can also communicate with a network and other terminals through wireless communication. The wireless communication can use any communication standard or protocol, including but not limited to Global System (GSM), General Packet Radio Service (GPRS), and Code Division Multiple Access (Code) Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), E-mail, Short Messaging Service (SMS), etc.

In the embodiment of the present application, the terminal 500 can implement communication services and send information to other contacts. Therefore, the terminal 500 needs to have a data transmission function, that is, the terminal 500 needs to include a communication module inside. Although FIG. 5 shows a communication module such as the RF circuit 510, it can be understood that at least one of the above components or other communication modules (such as a Bluetooth module) for implementing communication exist in the terminal 500 to perform data transmission.

The memory 530 may be used to store software programs and modules. The processor 520 executes various functional applications and data processing of the terminal 500 by running software programs and modules stored in the memory 530, and can be implemented after the processor 520 executes the program code in the memory 530 Part or all of the processes in FIG. 5 in the embodiment of the present application.

In some embodiments of the present application, the memory 530 may mainly include a storage program area and a storage data area. The storage program area can store an operating system, various application programs (such as communication applications), and a face recognition module. The storage data area can store data (such as various pictures, video files, etc.) created according to the use of the terminal. Multimedia files, and face information templates).

In addition, the memory 530 may include a high-speed random access memory, and may further include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices.

The processor 520 is a control center of the terminal 500, and uses various interfaces and lines to connect various components, runs or executes software programs and / or modules stored in the memory 530, and calls stored in the memory The data in 530 executes various functions of the terminal 500 and processes data, thereby realizing various services based on the terminal.

In some embodiments of the present application, the processor 520 may include one or more processing units. In some embodiments of the present application, the processor 520 may integrate an application processor and a modem processor, wherein the application processor mainly processes an operating system, a terminal interface, and an application program, and the modem processor mainly Handle wireless communication. It may be understood that the foregoing modem processor may not be integrated into the processor 520.

Based on the same inventive concept, an embodiment of the present application also provides a method for constructing a CoMP set. Since the device corresponding to the method is a terminal for constructing a CoMP set in the embodiment of the present application, and the principle of the method for solving the problem is similar to that of the device, Therefore, the implementation of this method can refer to the implementation of the system.

As shown in FIG. 6, an embodiment of the present application provides a method for constructing a CoMP set, which specifically includes the following steps:

Step 600: The terminal generates a candidate set including at least two base stations according to the signal strength with the base station.

Step 601: The terminal sends a CoMP set join request to a base station in the candidate set.

Step 602: The terminal adds a base station in the candidate set to a CoMP set according to the information returned by the base station.

In some embodiments of the present application, the terminal sending a CoMP set join request to a base station in the candidate set includes:

Sending, by the terminal, a CoMP set join request to multiple base stations in the candidate set;

The adding the base station in the candidate set to the CoMP set according to the information returned by the base station includes:

If the number of returned base stations that agree to join is greater than N, the terminal selects N base stations from the returned approved base stations to join the CoMP set, where N is the maximum number of base stations in the CoMP set and the number of base stations that have joined the CoMP set. The difference; or

If the number of returned base stations that agree to join is not greater than N, the terminal adds the returned base stations that agree to join to the CoMP set.

In some embodiments of the present application, the terminal sending a CoMP set join request to at least one base station in the candidate set includes:

The terminal selects the first N base stations in descending order of signal strength, where N is the difference between the maximum number of base stations in the CoMP set and the number of base stations that have joined the CoMP set;

The terminal sends a CoMP set join request to the selected base station.

In some embodiments of the present application, after the terminal adds the base station in the candidate set to the CoMP set according to the information returned by the base station, the terminal further includes:

If the signal strength in the CoMP set is less than the minimum signal strength of the base stations in the candidate set, and the number of base stations whose difference reaches a third threshold reaches a set second threshold, the terminal clears the CoMP set; or

If the number of base stations in the CoMP set is less than the minimum value and the number of base stations whose difference reaches the third threshold reaches the set second threshold, the terminal clears the CoMP set.

Based on the same inventive concept, a method for constructing a CoMP set is also provided in an embodiment of the present application. Since the device corresponding to the method is a base station for constructing a CoMP set in the embodiment of the present application, and the principle of the method for solving the problem is similar to the device, Therefore, the implementation of this method can refer to the implementation of the system.

As shown in FIG. 7, an embodiment of the present application further provides a method for constructing a CoMP set. The method includes:

Step 700: The base station receives a CoMP set join request sent by the terminal.

Step 701: The base station determines whether to join a CoMP set.

Step 702: After determining to join the CoMP set, the base station notifies the terminal to agree to join the CoMP set.

In some embodiments of the present application, the determining whether the base station joins a CoMP set includes:

The base station determines whether to join the CoMP set of the terminal according to the performance parameter and / or priority of the terminal.

In the above-mentioned embodiment provided in the present application, the method provided in the embodiment of the present application is described from the perspective of the terminal and the base station as the execution subjects. In order to implement the functions in the method provided by the embodiments of the present application, the terminal and the base station may include a hardware structure and / or a software module, and implement the foregoing functions in the form of a hardware structure, a software module, or a hardware structure and a software module. Whether one of the above functions is executed by a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application of the technical solution and design constraints.

For serial transmission, as shown in FIG. 8, the related process operations of the method for constructing a CoMP set described in the embodiment of the present application include:

Step 800: the terminal measures the signal strength of the surrounding base stations;

Step 801: The terminal adds a base station with a signal strength greater than a first threshold to a candidate set, and generates a candidate set including multiple base stations;

Step 802: the terminal selects a base station in the candidate set, and sends a CoMP set join request to the selected base station;

Step 803: The base station receives a CoMP set join request sent by the terminal.

Step 804: The base station determines whether the fairness index is greater than the index threshold, and if so, executes step 805; otherwise, executes step 806;

Step 805: The base station determines to join the CoMP set, and notifies the terminal to agree to join the CoMP set, and executes step 807.

Step 806: The base station determines not to join the CoMP set, and notifies the terminal of refusing to join the CoMP set and executes step 807.

Step 807: The terminal determines whether the base station agrees to join the CoMP set, and if so, executes step 808; otherwise, executes step 809;

Step 808: the terminal selects at least one base station from the returned base stations that agree to join the CoMP set to join the CoMP set and executes step 810;

Step 809: the terminal deletes the base station that has refused to join the CoMP set from the candidate set and executes step 810;

Step 810: The terminal determines whether the number of base stations in the CoMP set reaches a preset number, and if so, executes step 813; otherwise, executes step 811;

Step 811: The terminal determines whether there is a base station in the candidate set, and if so, returns to step 802; otherwise, executes step 812;

Step 812: The terminal updates a preset number of base stations that can be added to the CoMP set.

Step 813: The terminal determines that the CoMP set is constructed.

An embodiment of the present application further provides a device for constructing a CoMP set, which is applied to a terminal side. As shown in FIG. 9, the device includes a processor 900 and a memory 901, where the processor 900 stores computer instructions, and The computer instructions are implemented when executed by the memory 901:

Sending a CoMP set join request to a base station in the candidate set;

In some embodiments of the present application, the memory 901 is configured to:

Sending a CoMP set join request to multiple base stations in the candidate set;

Send a CoMP set join request to the selected base station.

In some embodiments of the present application, the memory 901 is further configured to:

If the signal strength in the CoMP set is less than the minimum signal strength of the base stations in the candidate set, and the number of base stations whose difference reaches a third threshold reaches a set second threshold, the CoMP set is cleared; or

An embodiment of the present application further provides a device for constructing a CoMP set, which is applied to a base station side. As shown in FIG. 10, the device includes a processor 1000 and a memory 1001, where the processor 1000 stores computer instructions, and The computer instructions are implemented when executed by the memory 1001:

Receiving a CoMP set join request sent by a terminal;

Determine whether to join the CoMP set;

In some embodiments of the present application, whether to join the CoMP set of the terminal is determined according to the performance parameters and / or priorities of the terminal.

An embodiment of the present application further provides a computer-readable non-volatile readable storage medium including program code. When the program code is run on a computing device, the program code is used to cause the computing device to execute the foregoing. Steps applied to any method of constructing a CoMP set on the terminal side.

An embodiment of the present application further provides a computer-readable non-volatile readable storage medium including program code. When the program code is run on a computing device, the program code is used to cause the computing device to execute the foregoing. Steps applied to any method of constructing a CoMP set on the base station side.

The above describes the present application with reference to block diagrams and / or flowcharts showing methods, devices (systems) and / or computer program products according to embodiments of the present application. It should be understood that one block of the block diagrams and / or flowchart illustrations, and a combination of blocks of the block diagrams and / or flowchart illustrations can be implemented by computer program instructions. These computer program instructions may be provided to a general purpose computer, a processor of a special purpose computer, and / or other programmable data processing device to produce a machine such that the instructions executed via the computer processor and / or other programmable data processing device create A method for implementing the functions / actions specified in the block diagrams and / or flowchart blocks.

Accordingly, the application can also be implemented in hardware and / or software (including firmware, resident software, microcode, etc.). Still further, the present application may take the form of a computer program product on a computer-usable or computer-readable storage medium having computer-usable or computer-readable program code implemented in the medium for use by an instruction execution system or Used in conjunction with the instruction execution system. In the context of this application, a computer-usable or computer-readable medium may be any medium that can contain, store, communicate, transmit, or transfer a program for use by or in connection with an instruction execution system, apparatus, or device, Device or equipment. Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. In this way, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application is also intended to include these modifications and variations.

Claims

A method for constructing a multi-point cooperative CoMP set, the method includes:

The terminal generates a candidate set including at least two base stations according to the signal strength with the base station;

Sending, by the terminal, a CoMP set join request to a base station in the candidate set;

The terminal adds the base station in the candidate set to the CoMP set according to the information returned by the base station.
The method according to claim 1, wherein the terminal sending a CoMP set join request to a base station in the candidate set comprises:

Sending, by the terminal, a CoMP set join request to multiple base stations in the candidate set;

The adding the base station in the candidate set to the CoMP set according to the information returned by the base station includes:

If the number of returned base stations that agree to join is greater than N, the terminal selects N base stations from the returned approved base stations to join the CoMP set, where N is the maximum number of base stations in the CoMP set and the number of base stations that have joined the CoMP set. The difference; or

If the number of returned base stations that agree to join is not greater than N, the terminal adds the returned base stations that agree to join to the CoMP set.
The method according to claim 1, wherein the terminal sending a CoMP set join request to at least one base station in the candidate set comprises:

The terminal selects the first N base stations in descending order of signal strength, where N is the difference between the maximum number of base stations in the CoMP set and the number of base stations that have joined the CoMP set;

The terminal sends a CoMP set join request to the selected base station.
The method of claim 1, after the terminal adds the base station in the candidate set to the CoMP set according to the information returned by the base station, further comprising:

If the signal strength in the CoMP set is less than the minimum signal strength of the base stations in the candidate set, and the number of base stations whose difference reaches a third threshold reaches a set second threshold, the terminal clears the CoMP set; or

If the number of base stations in the CoMP set is less than the minimum value and the number of base stations whose difference reaches the third threshold reaches the set second threshold, the terminal clears the CoMP set.
A method for constructing a CoMP set, the method includes:

The base station receives a CoMP set join request sent by the terminal;

The base station determines whether to join a CoMP set;

After determining to join the CoMP set, the base station notifies the terminal to agree to join the CoMP set.
The method according to claim 5, wherein the base station determining whether to join a CoMP set comprises:

The base station determines whether to join the CoMP set of the terminal according to the performance parameter and / or priority of the terminal.
A device for constructing a CoMP set, the device includes a memory and a processor, wherein the memory stores computer instructions, and the computer instructions are implemented when the processor executes:

Generating a candidate set including at least two base stations according to the signal strength with the base station;

Sending a CoMP set join request to a base station in the candidate set;

Add the base stations in the candidate set to the CoMP set according to the information returned by the base stations.
The apparatus of claim 7, the processor is configured to:

Sending a CoMP set join request to multiple base stations in the candidate set;

When the base stations in the candidate set are added to the CoMP set according to the information returned by the base stations, if the number of returned base stations that agree to join is greater than N, then N base stations are selected to be added to the CoMP set from the returned base stations that agree to join, where N is the difference between the maximum number of base stations in the CoMP set and the number of base stations that have joined the CoMP set; or if the number of base stations that agree to join is not greater than N, the base stations that return to join are added to the CoMP set.
The apparatus of claim 7, the processor is configured to:

Select the first N base stations in descending order of signal strength, where N is the difference between the maximum number of base stations in the CoMP set and the number of base stations that have joined the CoMP set;

Send a CoMP set join request to the selected base station.
The device of claim 7, the processor is further configured to:

If the signal strength in the CoMP set is less than the minimum signal strength of the base stations in the candidate set, and the number of base stations whose difference reaches the third threshold reaches the set second threshold, the CoMP set is cleared; or

If the number of base stations in the CoMP set is less than the minimum value and the number of base stations whose difference reaches the third threshold reaches the set second threshold, the CoMP set is cleared.
A device for constructing a CoMP set, the device includes a memory and a processor, wherein the memory stores computer instructions, and the computer instructions are implemented when the processor executes:

Receiving a CoMP set join request sent by a terminal;

Determine whether to join the CoMP set;

After determining to join the CoMP set, the terminal is notified to agree to join the CoMP set.
The device of claim 11, the processor is further configured to:

Determine whether to join the CoMP set of the terminal according to the terminal's performance parameters and / or priorities.
A computer-readable non-volatile storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method according to any one of claims 1 to 4.
A computer-readable non-volatile storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method according to any one of claims 5 to 6.