CN110876153B - Method and equipment for constructing CoMP set - Google Patents

Method and equipment for constructing CoMP set Download PDF

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Publication number
CN110876153B
CN110876153B CN201811006120.7A CN201811006120A CN110876153B CN 110876153 B CN110876153 B CN 110876153B CN 201811006120 A CN201811006120 A CN 201811006120A CN 110876153 B CN110876153 B CN 110876153B
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base stations
comp set
terminal
base station
comp
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CN110876153A (en
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王家恒
马路娟
郭徽
彭潜
胡征宇
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Hisense Co Ltd
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Hisense Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic

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  • Mobile Radio Communication Systems (AREA)

Abstract

The invention relates to the technical field of communication, in particular to a method and equipment for constructing a CoMP set, which are used for solving the problems that the existing construction method influences the system performance when the information interaction time delay between base stations is longer and cannot timely cope with the movement of a terminal. The method of the invention comprises the following steps: the terminal generates a candidate set comprising a plurality of base stations by measuring the signal strength; the terminal sends a CoMP set joining request to at least one base station in the candidate set; and the terminal selects at least one base station from the base stations which return to agree to join the CoMP set. A base station receives a CoMP set adding request sent by a terminal; and the base station informs the terminal of agreeing to join the CoMP set after determining to join the CoMP set. The base stations do not need to interact with each other, and the signaling between the base stations and the terminal is extremely short, thereby reducing the complexity of the system and the signaling overhead.

Description

Method and equipment for constructing CoMP set
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and a device for constructing a CoMP set.
Background
With the rapid increase of the density of the deployment nodes and the antenna array of the 5G network, the super-densification of the 5G network brings a series of problems to a CoMP (Coordinated Multiple Points) technology while improving the communication service quality of the system. On one hand, the scarcity of spectrum resources makes interference inevitable in the ultra-dense wireless network CoMP technology; on the other hand, the 5G network is dense, which brings complex resource competition between base stations/terminals, so that the CoMP technology needs an efficient coordination area allocation scheme.
Existing communication systems have many methods to deal with the CoMP set construction problem, and in recent years, companies have proposed new CoMP proposals at 5G standardization conference. The existing CoMP set construction technology has two main proposals in Rel-15(phase 1, the first stage), namely, CoMP coordination area allocation and adaptive coordination area allocation based on the X2 interface characteristics. The scheme of distributing the CoMP cooperation area based on the X2 interface characteristic is sensitive to time delay, and if the time delay of information interaction between base stations is large, the system performance is greatly influenced; the scheme of adaptive cooperation area allocation cannot quickly obtain a construction scheme of the CoMP set for the movement of the terminal, so that the scheme cannot timely cope with the movement of the terminal.
In summary, the current CoMP set construction method can bring a great influence on system performance when the time delay of information interaction between base stations is long, and cannot cope with the movement of the terminal in time.
Disclosure of Invention
The invention provides a method and equipment for constructing a CoMP set, which are used for solving the problems that the existing CoMP construction technology can bring great influence to the system performance when the information interaction time delay between base stations is longer, and the movement of a terminal cannot be responded in time.
In a first aspect, a method for constructing a CoMP set provided in an embodiment of the present invention includes:
the terminal generates a candidate set comprising at least two base stations according to the signal strength between the terminal and the base stations; the terminal sends a CoMP set joining request to the base stations in the candidate set; and the terminal adds the base stations in the candidate set into the CoMP set according to the information returned by the base stations.
According to the method, the terminal generates a candidate set comprising at least two base stations by measuring the signal strength and sends a CoMP set adding request to the base stations in the candidate set, the terminal selects the base stations from the base stations which return to agree to add the CoMP set to add to the CoMP set, interaction between the terminal and the terminal is not needed, the construction of the CoMP set is judged by depending on the request and reply between the base stations, the interaction between the terminal and the base stations only comprises request and reply information, the signaling is extremely short, and the signaling overhead is reduced while the system complexity is reduced.
In a possible implementation manner, the sending, by the terminal, a CoMP set join request to the base stations in the candidate set includes:
the terminal sends a CoMP set joining request to a plurality of base stations in the candidate set;
the terminal adds the base stations in the candidate set into the CoMP set according to the information returned by the base stations, and the method comprises the following steps:
if the number of the base stations which are returned to agree to be added is larger than N, the terminal selects N base stations from the base stations which are returned to agree to be added into the CoMP set, wherein N is the difference between the maximum number of the base stations of the CoMP set and the number of the base stations which are added into the CoMP set; or;
and if the number of the base stations which are allowed to be added back is not more than N, the terminal adds the base stations which are allowed to be added back into the CoMP set.
According to the method, the terminal can send the CoMP set adding request to the base stations in the candidate set, the base stations which return the agreement are added into the CoMP set, and the number of the base stations which agree to be added is required to be judged when the base stations are added, because the number of the base stations which return the agreement is possibly larger than the difference between the maximum number of the base stations in the CoMP set and the number of the base stations which are added into the CoMP set, in this case, the terminal can select N base stations to add into the CoMP set, and then the CoMP set adding request does not need to be sent to the base stations in the candidate set, so that the time of signaling interaction can be saved.
In a possible implementation manner, the sending, by the terminal, a CoMP set join request to at least one base station in the candidate set includes:
the terminal selects the first N base stations according to the sequence of the signal intensity from large to small, wherein N is the difference between the maximum number of the base stations of the CoMP set and the number of the base stations added into the CoMP set;
and the terminal sends a CoMP set joining request to the selected base station.
According to the method, the terminal sends the CoMP set adding request to the base station in the CoMP set according to the signal intensity, so that the efficiency and the quality of the construction of the CoMP set are improved. The larger the signal strength of the base station in the CoMP set is, the shorter the interaction delay between the base station and the terminal is.
In a possible implementation manner, after the terminal adds the base station in the candidate set to the CoMP set according to information returned by the base station, the method further includes:
if the signal intensity in the CoMP set is smaller than the minimum signal intensity of the base stations in the candidate set and the number of the base stations with the difference value reaching a third threshold value reaches a set second threshold value, the terminal empties the CoMP set; or;
and if the signal intensity in the CoMP set is smaller than the minimum value and the number of the base stations with the difference value reaching the third threshold value reaches the set second threshold value, the terminal clears the CoMP set.
According to the method, after the base station joins the CoMP set, whether the number of the base stations with the signal intensity smaller than the minimum signal intensity of the base station in the candidate set in the CoMP set reaches the set second threshold value or not is judged, so that the CoMP set can be updated, and the movement of the terminal can be responded to in time.
In a second aspect, a method for constructing a CoMP set provided by the embodiment of the present invention includes:
a base station receives a CoMP set adding request sent by a terminal; the base station judges whether to join a CoMP set or not; and the base station informs the terminal of agreeing to join the CoMP set after determining to join the CoMP set.
In the method, the base station judges whether to join the CoMP set after receiving the CoMP set joining request sent by the terminal, and replies the decision to the terminal. The base station and the base station do not need to interact, the construction of the CoMP set depends on the request and the reply between the base station and the terminal to judge, the interaction between the terminal and the base station only comprises the request and the reply information, the signaling is extremely short, and the signaling overhead is reduced while the system complexity is reduced.
In a possible implementation manner, the determining whether the base station joins the CoMP set includes:
and the base station judges whether to join the CoMP set of the terminal according to the performance parameters and/or the priority of the terminal.
According to the method, the base station determines whether to add the CoMP set according to the performance parameters and/or the priority of the terminal, and determines to enable the connection between the terminal and the base station to be more advantageous according to the performance parameters of the terminal, wherein the higher the priority is, the higher the gain brought by the base station after adding the CoMP set of the terminal is, so that the quality of the construction of the CoMP set can be improved.
In a possible implementation manner, after the base station determines whether to join the CoMP set, the method further includes:
and the base station informs the terminal of refusing to join the CoMP set after determining not to join the CoMP set.
According to the method, the base station notifies the terminal to refuse to join the CoMP set after determining not to join the CoMP set, the construction of the CoMP set is completed through the request and the reply between the base station and the terminal, and the complexity of the system is reduced.
In a third aspect, an embodiment of the present invention further provides an apparatus for constructing a CoMP set, where the apparatus includes a processing module, a sending module, and an operating module:
the processing module is used for generating a candidate set comprising at least two base stations according to the signal strength between the base stations;
a sending module, configured to send a CoMP set join request to the base stations in the candidate set;
and the operation module is used for adding the base stations in the candidate set into the CoMP set according to the information returned by the base stations.
In a fourth aspect, an embodiment of the present invention further provides an apparatus for constructing a CoMP set, where the apparatus includes a receiving module, a processing module, and a transmitting module:
the receiving module is used for receiving a CoMP set joining request sent by the terminal;
the processing module is used for judging whether to add the CoMP set or not;
and the transmission module is used for informing the terminal of agreeing to join the CoMP set after the CoMP set is determined to be joined.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a system for constructing a CoMP set according to an embodiment of the present invention;
fig. 2A is a schematic diagram of a constructed CoMP list according to an embodiment of the present invention;
fig. 2B is a schematic diagram illustrating that a terminal simultaneously sends a CoMP set join request to multiple base stations in a candidate list according to an embodiment of the present invention;
fig. 2C is a schematic diagram illustrating that a plurality of base stations in a candidate list join a CoMP set according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a first terminal according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a second terminal according to an embodiment of the present invention;
fig. 6 is a schematic flowchart of a method at a terminal side in a method for constructing a CoMP set according to an embodiment of the present invention;
fig. 7 is a schematic flowchart of a method at a base station side in a method for constructing a CoMP set according to an embodiment of the present invention;
fig. 8 is a flowchart illustrating a method for constructing a CoMP set according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Some of the words that appear in the text are explained below:
1. the terminal in the embodiment of the invention is a mobile phone, a tablet, a computer and the like.
2. The "base station" referred to in the embodiments of the present invention is a public mobile communication base station, which is a form of a radio station, and refers to a radio transceiver station that performs information transfer with a mobile phone terminal through a mobile communication switching center in a certain radio coverage area.
3. The "signal strength" referred to in the embodiments of the present application refers to the signal strength of the signal transmitted by each base station at the terminal.
4. In the embodiment of the present application, the term "and/or" describes an association relationship of associated objects, and means that there may be three relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
5. The fairness index in the embodiment of the application is used for considering fairness when the base station provides wireless transmission service for a certain terminal, communication resources are not evenly distributed, connection between the terminal and the base station is guaranteed to be more advantageous, and resource shortage or resource waste caused by unfair connection between the terminal and the base station is avoided.
The embodiments of the present invention will be described in further detail with reference to the drawings attached hereto.
As shown in fig. 1, the system for constructing a CoMP set according to the embodiment of the present invention includes: terminal 10, base station 20.
A terminal 10, configured to generate a candidate set including at least two base stations according to signal strength between the terminal and the base station; sending a CoMP set joining request to the base stations in the candidate set; and adding the base stations in the candidate set into the CoMP set according to the information returned by the base stations.
A base station 20, configured to receive a CoMP set join request sent by a terminal; judging whether to join a CoMP set or not; and after determining to join the CoMP set, informing the terminal of agreeing to join the CoMP set.
In the embodiment of the invention, a terminal generates a candidate set comprising at least two base stations by measuring the signal strength and sends a CoMP set adding request to the base stations in the candidate set, the base stations judge whether to add the CoMP set or not after receiving the CoMP set adding request sent by the terminal, the terminal is informed of agreeing to add the CoMP set after the CoMP set is determined to be added, and the terminal selects the base stations from the base stations which return to agree to add the CoMP set. In the embodiment of the invention, interaction between the base station and the base station is not needed, the construction of the CoMP set is judged by depending on the request and the reply between the base station and the terminal, and the interaction between the terminal and the base station only comprises the request and the reply information, so that the signaling is extremely short, the complexity of the system is reduced, and the signaling overhead is reduced.
In the embodiment of the invention, the terminal generates a candidate set comprising a plurality of base stations by measuring the signal strength.
Wherein the signal strength may be determined by the received power and/or the signal noise.
Wherein the form of the candidate set includes but is not limited to part or all of the following ways:
list, array, stack, queue.
The example of the terminal measuring the received power is given as an example. As shown in fig. 2A, the terminal adds the base station with the received power greater than the set first threshold into the candidate list by measuring the received power of the csi reference signal transmitted by the base station at the terminal.
Assume that the first threshold is set to be terminal ujMinimum receive power threshold p-TH for wireless communication servicej， pijIs a base station BSiThe transmitted signal being at terminal ujMay be obtained by measuring the received power of the csi-rs.
In particular, terminal ujAfter receiving the channel state information reference signal transmitted by each base station, measuring the signal of each base station at the terminal ujIf the received power p isijGreater than terminal ujMinimum receive power threshold p-TH for wireless communication servicejI.e. pij＞p-THjThen represents the base station BSiCan join the terminal ujThe candidate list of (2).
Suppose that each base station signal is at terminal ujThe received power of (a) is:
p1j＞p2j＞p3j＞…＞pL(j)j＞p-THj＞pL(j)+1,j＞…
the first L base stations can join the terminal ujThe candidate list of (2).
The base stations that may be added to the candidate set may or may not be ranked when added to the candidate set. Optionally, the sorting may be from small to large or from large to small.
The terminal arranges the first L base stations from large to small according to the received power to generate the candidate list shown in fig. 2A.
Taking the measurement of the received power by the terminal as an example, for different terminals, the generated candidate sets are generally different, and the received power of each base station needs to be compared with the set first threshold value when the candidate set is generated each time.
Optionally, the received power of each base station may be quantized according to the priority index, assuming that the ith base station BSiAt jth terminal ujThe priority index function of (a) may be expressed as:
PIj(BSi)＝pij
wherein p isijIs a base station BSiTransmitted channel state information reference signal at terminal ujThe received power of.
In the embodiment of the invention, after the candidate set is generated, 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 is, the more base stations serve the same terminal, which results in larger performance gain, but consumes more resources, whereas the smaller the number of base stations in the CoMP set is, the smaller the number of base stations serving the same terminal is, which reduces the consumption of resources, but also reduces the performance gain.
Optionally, the terminal may set a suitable preset number for the number of base stations in the CoMP set, and 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 the base stations which reply the approval request by the terminal is smaller than the preset number of the base stations in the CoMP set of the terminal, the preset number of the base stations in the CoMP set needs to be adjusted.
Suppose terminal ujThe number of the null of the CoMP set is e-CoMP (j), when the terminal ujThe number of all base stations replying to the agreement request is less than that of the terminal ujWhen the preset number of base stations in the CoMP set is not enough to fill the CoMP set, the terminal u is considered to bejThe CoMP set of (a) cannot be filled up, when let:
e-CoMP(j)＝0
terminal u when e-CoMP (j) is 0jJudging that the number of base stations in the CoMP set reaches a preset number; otherwise, consider terminal ujThe number of base stations in the CoMP set has not reached the preset number.
The method for the terminal to send the CoMP set joining request to the base stations in the candidate set includes unequal feedback sending and equal feedback sending.
The sending mode is one or unequal feedback 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 N base stations that have not sent the CoMP set join request in the candidate set, and the terminal can continue to send the CoMP set join request to the base stations that have not sent the CoMP set join request without waiting for feedback information that the base stations approve or reject joining after sending the CoMP set request to the base stations.
When the terminal sends CoMP set join requests to the N base stations in the candidate set, there are two ways: parallel transmission and serial transmission.
Mode 1, parallel transmission, that is, the terminal simultaneously transmits CoMP set join requests to N base stations in the candidate set.
Taking the generation of the candidate list as an example, as shown in FIG. 2B, terminal ujTo 3 base stations in the candidate list: BS1，BS2，BS3And simultaneously sending a CoMP set joining request.
There are many cases when the terminal sends CoMP set join requests to N base stations in the candidate set at the same time, which are listed below.
(1) And the terminal simultaneously sends a CoMP set joining request to all the rest base stations in the candidate set.
Suppose terminal ujIs preset number of base stations in the CoMP setAt 10, the number of base stations already added to the CoMP set is 4, and 6 more base stations need to be added, and the number of base stations in the candidate set that have not sent the CoMP set join request is 7. Terminal ujAnd simultaneously sending CoMP set joining requests to the remaining 7 base stations in the candidate set.
If all 7 base stations reply the agreement request, the terminal ujAnd 6 base stations are selected from the 7 base stations to join the CoMP set. If only 5 base stations in the 7 base stations reply the agreement request, the terminal adds all the 5 base stations into the CoMP set and updates the preset number of the CoMP set.
(2) The terminal selects several base stations in the candidate set and simultaneously sends a CoMP set joining request to the selected base stations.
Suppose terminal ujThe preset number of the base stations in the CoMP set is 10, the number of the base stations already added to the CoMP set is 4, 6 base stations are also required to be added, and the number of the base stations not sending the CoMP set addition request in the candidate set is 7. At this time, terminal ujSelect 6 base stations in the candidate set and send CoMP set join requests to the 6 base stations simultaneously. If all 6 base stations agree to join the terminal ujAnd if the CoMP set is established, the terminal determines that the CoMP set is established, otherwise, the terminal updates the preset number of the CoMP set.
According to the 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, so that the efficiency of constructing the CoMP set is high, the speed is high, and waste of some base station resources in the candidate set can be caused.
Mode 2, serial transmission, that is, the terminal transmits a CoMP set join request to one of the N base stations in the candidate set.
There are many orders in which the terminal sends CoMP set join requests to base stations in the candidate set, one by one, to name a few.
And sequentially sending the first sequence and the second sequence according to the sequence in the candidate set.
Suppose that no CoMP set join request has been sent in a candidate set ordered by signal strength from large to smallThe base station comprises a base station 1, a base station 2, a base station 3 and a terminal ujThe number of the empty amount of the CoMP set is 3, at this time, the terminal sends CoMP set adding requests to the base stations 1, 2 and 3 in sequence according to the order of the candidate set, and replies to the terminal u at each base stationjThen, sending a CoMP set joining request to the next base station, and if the base station 2 and the base station 3 agree to join the terminal ujIn the CoMP set, the base station 1 refuses to join the terminal ujThe preset number of the CoMP sets is updated to be 2.
And the second sequence is not randomly transmitted according to the sequence in the candidate set.
Suppose that base stations which do not send the CoMP set joining request in the candidate sets sorted from large signal strength to small signal strength comprise a base station 1, a base station 2, a base station 3 and a terminal ujThe number of the vacancy of the CoMP set is 2, at this time, the terminal may send a CoMP set join request to the base station 2 first without sorting the candidate set, and the base station 2 replies to the grant to join the terminal ujAfter the CoMP set, sending a CoMP set joining request to the base station 1, and if the base station 1 agrees to join the terminal ujIn the CoMP set, terminal ujDetermining to finish the construction of the CoMP set, otherwise, the terminal ujA CoMP set join request is sent to the base station 3.
And a second transmission mode is that the feedback is transmitted after the feedback.
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 the base stations which have not sent the CoMP set join request in the candidate set, and only sends the CoMP set join request to one of the base stations each time, and after the base station feeds back information for determining join or refusal join to the terminal, whether the CoMP set join request is sent to the next base station is judged.
According to the method, after the terminal sends the CoMP set adding request to the base stations in the candidate set, the terminal needs to wait for the feedback information of the base stations, and the CoMP set adding request is continuously sent after whether the base stations add the CoMP set or not is judged according to the feedback information.
Optionally, a candidate pointer may be preset, and when the terminal sends the CoMP set join request to the base station in the candidate set, the pointer points to the next base station in the candidate set that has not sent the CoMP set join request.
Taking the generation of the candidate list as an example, pt (u) is shown in FIG. 2Cj) For terminal ujCandidate pointer of (2) to terminal ujAnd the next base station in the candidate list which does not send the CoMP set joining request. At the beginning, the CoMP set is empty, pt (u)j) Pointing to the first base station BS of the candidate list1The maximum number of base stations in the CoMP set is q (j), and the terminal ujWhen the number of base stations in the CoMP set does not reach the preset number, the terminal sends CoMP set addition requests to min { e-CoMP (j) } which do not send CoMP set addition requests in the candidate list, wherein e-CoMP (j) is the terminal ujThe number of CoMP set slots, cd (j) is terminal ujThe number of base stations that have not sent the CoMP set join request in the candidate list.
Wherein the value of min { e-CoMP (j), cd (j) } is e-CoMP (j) or cd (j).
(1) min { e-CoMP (j), cd (j) } takes the value of e-CoMP (j).
If terminal ujThe number of the null points of the CoMP set is less than or equal to the number of the terminal ujThe number of base stations that have not sent the CoMP set join request in the candidate list of (1), that is:
e-CoMP(j)≤cd(j)
then terminal ujTo candidate pointer pt (u)j) The pointed base station and the following base stations share e-CoMP (j) base stations to send a CoMP set joining request.
Suppose, terminal ujThe full amount of the CoMP set is 20, the empty amount of the current CoMP set is 5, and the terminal ujIf the number of base stations which have not sent the CoMP set join request in the candidate list is 6, the terminal ujAnd sending the CoMP set joining request to 5 base stations which do not send the CoMP set joining request in the candidate list.
(2) min { e-CoMP (j) }, cd (j) takes the value cd (j).
If terminal ujThe number of the null of the CoMP set is larger than the number of base stations which have not sent the CoMP set join request in the candidate list, namely:
e-CoMP(j)＞cd(j)
then terminal ujEven if all base stations which have not sent the CoMP set joining request in the candidate list are joined to the CoMP set, the CoMP set cannot be made full, so the terminal ujAnd sending the CoMP set joining request to the remaining cd (j) base stations which do not send the CoMP set joining request.
Suppose, terminal ujThe full amount of the CoMP set is 20, the empty amount of the current CoMP set is 6, and the terminal ujIf the number of base stations which have not sent the CoMP set join request in the candidate list is 4, the terminal ujAnd sending the CoMP set joining request to 4 base stations of which the candidate list does not send the CoMP set joining request in the order of the candidate list.
In order to improve the utilization rate of the base station in the CoMP set, after the base station receives the CoMP set join request sent by the terminal, whether to join the CoMP set can be judged according to the fairness index. Among other things, the fairness index can include, but is not limited to, some or all of the following: performance parameters of the terminal, priority.
The following describes the content of determining whether to add the CoMP set by taking the performance parameters and the priority of the terminal as examples.
In a first aspect, the performance parameter of the terminal may be a received power or a transmission rate.
1. The performance parameter of the terminal is the received power of a reference signal sent by the terminal at the base station;
according to terminal ujAt the base station BSiReceived power pu ofjiJudging whether the base station joins the CoMP set, if the terminal u joins the CoMP setjAt the base station BSiReceived power pu ofjiIf the power is larger than the power threshold, adding the CoMP set; otherwise, not join the CoMP set.
The method and the terminal ujTo the base station BSiThe CoMP set adding request sent only comprises a terminal ujReference to (2)Signals being at base station BSiReceived power pu ofjiAnd other information is not required, so that the signaling interaction time delay is reduced, and the complexity of the system is reduced.
2. The performance parameter of the terminal is the transmission rate requested by the terminal;
according to terminal ujOf reference signal rujJudging whether the base station joins the CoMP set, if the terminal u joins the CoMP setjOf reference signal rujIf the rate is greater than the rate threshold, adding the CoMP set; otherwise, not join the CoMP set.
The method and the terminal ujTo the base station BSiThe CoMP set joining request sent contains a terminal ujOf reference signal rujAnd other information is not required, so that the signaling interaction time delay is reduced, and the complexity of the system is reduced.
And in the second scheme, the priority is the communication priority of the terminal in a communication operator.
The communication priority of the terminal in the communication operator can be set by the operator, and the terminal ujThe higher the communication priority, the more advantageous is the establishment of the connection between the terminal and the base station, thereby improving the resource utilization rate.
Judging whether the base station is added into the CoMP set or not according to the communication priority of the terminal in a communication operator, and if the communication priority of the terminal in the communication operator is greater than a priority threshold, adding the CoMP set; otherwise, not join the CoMP set.
In implementation, whether the base station joins the CoMP set is judged according to the performance parameters and/or the priority of the terminal, so that the establishment of the connection between the terminal and the base station is more advantageous, the fairness of the connection between the terminal and the base station is ensured, and the lack of resources or the waste of resources caused by the unfair connection between the terminal and the base station is avoided.
According to the method, the fairness index is generated, whether the base station is added into the CoMP set or not is judged according to the fairness index, and therefore the base station resources in the constructed CoMP set are more effective when the connection degree of surrounding terminals is complex.
In the embodiment of the invention, a base station judges whether the fairness index is greater than an index threshold value; if so, the base station determines to join the CoMP set and informs the terminal of agreeing to join the CoMP set; otherwise, the base station determines not to join the CoMP set and informs the terminal to refuse to join the CoMP set.
Suppose, the base station BSiCalculate terminal ujHas a fairness index of FIi(uj) The fairness exponent threshold of itself is FI-THiIf FIi(uj)≥FI-THiThen base station BSiDetermining to join CoMP set and informing terminal ujAgreeing to join the CoMP set; otherwise, the base station BSiDetermining not to join CoMP set, and informing terminal ujDenying the CoMP set.
In the embodiment of the present invention, after the terminal selects at least one base station from the base stations that have returned the agreement to join the CoMP set, it is necessary to determine whether the number of base stations in the CoMP set reaches a preset number, to determine whether to continue sending the CoMP set join request to the base stations in the candidate set.
If so, the terminal completes the construction of the CoMP set, otherwise, the terminal continues to send a CoMP set joining request to the base stations in the candidate list.
In the embodiment of the invention, after the terminal selects at least one base station from the base stations which return to agree to join the CoMP set, the base stations which join the CoMP set and the base stations which refuse to join the CoMP set are deleted from the candidate set.
Suppose there are ck (j) base stations to terminal ujThe ack (j) base station numbers of the reply agreement request are added to the terminal ujRepresents that ck (j) base stations join the terminal ujThen the base stations are deleted from the candidate set, the base station replying the refusal request is directly deleted from the candidate set, and the terminal u is not changedjThe CoMP set of (1).
Optionally, the terminal may also delete the base station that sends the CoMP set addition request from the candidate set directly after sending the CoMP set addition request to the base station in the candidate set, and there is no need to wait for the base station to reply the request.
When the terminal moves, it needs to judge whether the CoMP set needs to be updated, but the judging process is complex, and it needs to collect the base station and terminal information by a new Function unit such as a camp (Coordination Area Management Function) to determine whether the CoMP set needs to be updated.
In implementation, the terminal selects at least one base station from the base stations which agree to join the CoMP set, and needs to determine whether the number of special base stations in the CoMP set reaches a set second threshold.
There are many ways to determine the special base station, and the following are listed as follows:
and judging whether the signal intensity of the base station in the CoMP set is smaller than the minimum signal intensity of the base station in the candidate set or not in a first judgment mode.
And if the signal intensity of the base station in the CoMP set is smaller than the minimum signal intensity of the base station in the candidate set and the difference value reaches a third threshold value, the base station is a special base station, otherwise, the base station is not the special base station.
And a second judgment mode is to judge whether the signal intensity of the base station in the CoMP set is smaller than a signal intensity threshold value.
A signal strength threshold may be preset, and it is determined whether the signal strength of the base station in the CoMP set is smaller than the threshold, if so, the base station is a special base station, otherwise, the base station is not a special base station.
According to the method, the threshold value is preset, the special base station is determined by judging the relation between the threshold value and the signal strength, the CoMP set cannot be updated for the small-range movement of the terminal due to the limitation of the special base station, and the construction efficiency of the CoMP set is improved.
Specifically, after the terminal selects at least one base station from the base stations which return to agree 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 clears the CoMP set; otherwise, the terminal judges whether the number of the base stations in the CoMP set reaches a preset number.
Under the condition that the spatial position of the terminal and the channel state do not change too much, the CoMP set is not changed after the establishment is completed. And if the change is large, namely the signal intensity of part of the base stations in the CoMP set is far smaller than that of the base stations in the candidate set, namely the number of the special base stations reaches a set second threshold value, clearing the CoMP set, refreshing the candidate set and reconstructing the CoMP set. Therefore, the CoMP set can be updated in time, and when the terminal moves, the CoMP set can also be updated, so that the terminal can be moved correspondingly.
Optionally, when the number of the special base stations does not reach the set second threshold, the terminal needs to determine whether the number of the base stations in the CoMP set reaches the preset number, and if so, the terminal completes the construction of the CoMP set; otherwise, the terminal continues to send the CoMP set joining request to at least one base station in the candidate set.
As shown in fig. 3, another terminal for constructing a CoMP set according to an embodiment of the present invention includes a processing module 300, a sending module 301, and an operating module 302:
a processing module 300 configured to generate a candidate set including at least two base stations according to signal strength between the candidate set and the base station;
a sending module 301, configured to send a CoMP set join request to the base stations in the candidate set;
an operation module 302, configured to add the base station in the candidate set to the CoMP set according to information returned by the base station.
Optionally, the processing module 300 is configured to:
sending CoMP set joining requests to a plurality of base stations in the candidate set;
when the base stations in the candidate set are added into the CoMP set according to the information returned by the base stations, if the number of the base stations which are returned to be added is larger than N, N base stations are selected from the base stations which are returned to be added into the CoMP set, wherein N is the difference between the maximum number of the base stations in the CoMP set and the number of the base stations which are added into the CoMP set; or if the number of the base stations which return to agree to join is not more than N, adding the base stations which return to agree to join into the CoMP set.
Optionally, the processing module 300 is configured to:
selecting the first N base stations according to the sequence of the signal intensity from large to small, wherein N is the difference between the maximum number of the base stations of the CoMP set and the number of the base stations added into the CoMP set;
and sending a CoMP set joining request to the selected base station.
Optionally, the processing module 300 is further configured to:
if the signal intensity in the CoMP set is smaller than the minimum signal intensity of the base stations in the candidate set and the number of the base stations with the difference value reaching a third threshold value reaches a set second threshold value, emptying the CoMP set; or;
and if the signal intensity in the CoMP set is smaller than the minimum value and the number of the base stations with the difference value reaching the third threshold value reaches the set second threshold value, emptying the CoMP set.
As shown in fig. 4, another base station for constructing a CoMP set according to an embodiment of the present invention includes a receiving module 400, a processing module 401, and a transmitting 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;
a transmission module 402, configured to notify the terminal that the terminal agrees to join the CoMP set after determining to join the CoMP set.
Optionally, the processing module 401 is configured to:
and judging whether to join the CoMP set of the terminal according to the performance parameters and/or the priority of the terminal.
Based on the same concept, another terminal for constructing a CoMP set is provided in the embodiment of the present invention, as shown in fig. 5, the terminal 500 includes: radio Frequency (RF) circuitry 510, a processor 520, a memory 530, and the like. Those skilled in the art will appreciate that the configuration of the terminal shown in fig. 5 is not intended to be limiting, and that the terminal provided by the embodiments of the present application may include more or less components than those shown, or some components may be combined, or a different arrangement of components.
The following describes the various components of the terminal 500 in detail with reference to fig. 5:
the RF circuitry 510 may be used for receiving and transmitting data during a communication or conversation. Specifically, the RF circuit 510 sends the downlink data of the base station to the processor 520 for processing; and in addition, sending the uplink data to be sent to the base station. In general, 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, RF circuit 510 may also communicate with networks and other terminals via wireless communications. The wireless communication may use any communication standard or protocol, including but not limited to Global System for Mobile communication (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, Short Messaging Service (SMS), and the like.
In the embodiment of the present application, the terminal 500 can implement a communication service to send information to other contacts, so that 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 is understood that at least one of the above components or other communication modules (e.g., bluetooth module) for implementing communication exist in the terminal 500 for 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 executing the software programs and modules stored in the memory 530, and after the processor 520 executes the program codes in the memory 530, part or all of the processes in fig. 5 according to the embodiment of the present invention can be implemented.
Alternatively, the memory 530 may mainly include a program storage area and a data storage area. The storage program area can store an operating system, various application programs (such as communication application), a face recognition module and the like; the storage data area may store data (such as various multimedia files like pictures, video files, etc., and face information templates) created according to the use of the terminal, etc.
Further, the memory 530 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 520 is a control center of the terminal 500, connects various components using various interfaces and lines, performs various functions of the terminal 500 and processes data by operating or executing software programs and/or modules stored in the memory 530 and calling data stored in the memory 530, thereby implementing various services based on the terminal.
Optionally, the processor 520 may include one or more processing units. Optionally, the processor 520 may integrate an application processor and a modem processor, wherein the application processor mainly processes an operating system, a terminal interface, an application program, and the like, and the modem processor mainly processes wireless communication. It will be appreciated that the modem processor described above may not be integrated into the processor 520.
Based on the same inventive concept, the embodiment of the present invention further provides a method for constructing a CoMP set, and since the device corresponding to the method is the terminal for constructing the CoMP set in the embodiment of the present invention, and the principle of the method for solving the problem is similar to that of the device, the implementation of the method can refer to the implementation of the system, and repeated details are not repeated.
As shown in fig. 6, an embodiment of the present invention provides a method for constructing a CoMP set, which specifically includes the following steps:
step 600, the terminal generates a candidate set comprising at least two base stations according to the signal intensity between the terminal and the base stations;
step 601, the terminal sends a CoMP set joining request to the base stations in the candidate set;
step 602, the terminal adds the base station in the candidate set to the CoMP set according to the information returned by the base station.
Optionally, the sending, by the terminal, a CoMP set join request to the base station in the candidate set includes:
the terminal sends a CoMP set joining request to a plurality of base stations in the candidate set;
the terminal adds the base stations in the candidate set into the CoMP set according to the information returned by the base stations, and the method comprises the following steps:
if the number of the base stations which are returned to agree to be added is larger than N, the terminal selects N base stations from the base stations which are returned to agree to be added into the CoMP set, wherein N is the difference between the maximum number of the base stations of the CoMP set and the number of the base stations which are added into the CoMP set; or;
and if the number of the base stations which are allowed to be added back is not more than N, the terminal adds the base stations which are allowed to be added back into the CoMP set.
Optionally, the sending, by the terminal, a CoMP set join request to at least one base station in the candidate set includes:
the terminal selects the first N base stations according to the sequence of the signal intensity from large to small, wherein N is the difference between the maximum number of the base stations of the CoMP set and the number of the base stations added into the CoMP set;
and the terminal sends a CoMP set joining request to the selected base station.
Optionally, 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 method further includes:
if the signal intensity in the CoMP set is smaller than the minimum signal intensity of the base stations in the candidate set and the number of the base stations with the difference value reaching a third threshold value reaches a set second threshold value, the terminal empties the CoMP set; or;
and if the signal intensity in the CoMP set is smaller than the minimum value and the number of the base stations with the difference value reaching the third threshold value reaches the set second threshold value, the terminal clears the CoMP set.
Based on the same inventive concept, the embodiment of the present invention further provides a method for constructing a CoMP set, and since the device corresponding to the method is the base station for constructing the CoMP set in the embodiment of the present invention, and the principle of the method for solving the problem is similar to that of the device, the implementation of the method can refer to the implementation of the system, and repeated details are not repeated.
As shown in fig. 7, an embodiment of the present invention further provides a method for constructing a CoMP set, where the method includes:
step 700, a base station receives a CoMP set joining request sent by a terminal;
step 701, the base station judges whether to join a CoMP set;
step 702, the base station notifies the terminal to approve to join the CoMP set after determining to join the CoMP set.
Optionally, the determining, by the base station, whether to join the CoMP set includes:
and the base station judges whether to join the CoMP set of the terminal according to the performance parameters and/or the priority of the terminal.
In the embodiments provided in the present application, the method provided in the embodiments of the present application is introduced from the perspective of the terminal and the base station as the execution subject. 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 functions in the form of a hardware structure, a software module, or a hardware structure and a software module. Whether any of the above-described functions is implemented as a hardware structure, a software module, or a hardware structure plus a software module depends upon the particular application and design constraints imposed on the technical solution.
For serial transmission, as shown in fig. 8, the related flow operations of the method for constructing a CoMP set according to the embodiment of the present invention include:
step 800: the terminal measures the signal intensity of surrounding base stations;
step 801: the terminal adds the base stations with the signal intensity larger than a set first threshold value into a candidate set to generate a candidate set comprising a plurality of base stations;
step 802: the terminal selects one base station in the candidate set and sends a CoMP set adding request to the selected base station;
step 803: a base station receives a CoMP set adding request sent by a terminal;
step 804: the base station judges whether the fairness index is larger than an index threshold value, if so, the step 805 is executed, otherwise, the step 806 is executed;
step 805: the base station determines to join the CoMP set, notifies the terminal of the approval of joining the CoMP set, and executes step 807;
step 806: the base station determines not to join the CoMP set, and notifies the terminal to refuse to join the CoMP set and executes step 807;
step 807: the terminal judges whether the base station agrees to join the CoMP set, if so, the step 808 is executed, otherwise, the step 809 is executed;
step 808: the terminal selects at least one base station from the base stations which return to agree to join the CoMP set and executes step 810;
step 809: the terminal deletes the base station refusing to join the CoMP set from the candidate set and executes step 810;
step 810: the terminal judges whether the number of the base stations in the CoMP set reaches a preset number, if so, the step 813 is executed, otherwise, the step 811 is executed;
step 811: the terminal judges whether the candidate set has base stations, if so, the step 802 is returned, otherwise, the step 812 is executed;
step 812: the terminal updates the preset number of base stations which can be added in the CoMP set;
step 813: and the terminal determines to finish the construction of the CoMP set.
An embodiment of the present invention further provides a non-transitory readable storage medium, which includes program code for causing a computing device to execute the steps of the method for constructing a CoMP set when the program code runs on the computing device.
The present application is described above with reference to block diagrams and/or flowchart illustrations of methods, apparatus (systems) and/or computer program products according to embodiments of the application. It will be understood that one block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, and/or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer and/or other programmable data processing apparatus, create means for implementing the functions/acts specified in the block diagrams and/or flowchart block or blocks.
Accordingly, the subject application may also be embodied in hardware and/or in software (including firmware, resident software, micro-code, etc.). Furthermore, 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 embodied in the medium for use by or in connection with an 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, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. 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 (9)

1. A method for constructing a coordinated multipoint (CoMP) set, the method comprising:
the terminal generates a candidate set comprising at least two base stations according to the signal strength between the terminal and the base stations;
the terminal sends a CoMP set joining request to the base stations in the candidate set;
the terminal selects a base station from the candidate set according to the information returned by the base station and adds the base station into the CoMP set;
after the terminal selects a base station from the candidate set to add to the CoMP set according to the information returned by the base station, the method further includes:
if the signal intensity in the CoMP set is smaller than the minimum signal intensity of the base stations in the candidate set and the number of the base stations with the difference value reaching a third threshold value reaches a set second threshold value, the terminal empties the CoMP set; or
And if the signal intensity in the CoMP set is smaller than the minimum value and the number of the base stations with the difference value reaching the third threshold value reaches the set second threshold value, the terminal clears the CoMP set.
2. The method of claim 1, wherein the terminal sending a CoMP set join request to base stations in the candidate set, comprising:
the terminal sends a CoMP set joining request to a plurality of base stations in the candidate set;
the terminal selects a base station from the candidate set to add to the CoMP set according to the information returned by the base station, and the method comprises the following steps:
if the number of the base stations which are returned to agree to be added is larger than N, the terminal selects N base stations from the base stations which are returned to agree to be added into the CoMP set, wherein N is the difference between the maximum number of the base stations of the CoMP set and the number of the base stations which are added into the CoMP set; or
And if the number of the base stations which are returned to agree to be added is not more than N, the terminal adds the base stations which are returned to agree to be added into the CoMP set.
3. The method of claim 1, wherein the terminal sending a CoMP set join request to base stations in the candidate set, comprising:
the terminal selects the first N base stations according to the sequence of the signal intensity from large to small, wherein N is the difference between the maximum number of the base stations of the CoMP set and the number of the base stations added into the CoMP set;
and the terminal sends a CoMP set joining request to the selected base station.
4. A method of constructing a CoMP set, the method comprising:
a base station receives a CoMP set adding request sent by a terminal, wherein the base station is a base station in a candidate set, and the candidate set is a set which is generated by the terminal according to the signal intensity between the terminal and the base station and comprises at least two base stations;
the base station judges whether to join a CoMP set or not;
the base station informs the terminal of agreeing to join the CoMP set after confirming to join the CoMP set, so that the terminal selects the base station from the candidate set to join the CoMP set according to the information returned by the base station, and the CoMP set is emptied when the following conditions are met:
the number of base stations of which the signal intensity is smaller than the minimum signal intensity of the base stations in the candidate set and the difference value reaches a third threshold value in the CoMP set reaches a set second threshold value; or
And the number of the base stations of which the signal intensity is smaller than the minimum value and the difference value reaches the third threshold value in the CoMP set reaches the set second threshold value.
5. The method of claim 4, wherein the base station determining whether to join a CoMP set comprises:
and the base station judges whether to join the CoMP set of the terminal according to the performance parameters and/or the priority of the terminal.
6. An apparatus for constructing a CoMP set, the apparatus comprising:
a processing unit and a storage unit, wherein the storage unit stores program code that, when executed by the processing unit, causes the processing unit to perform the following:
generating a candidate set comprising at least two base stations according to the signal strength between the base stations;
sending a CoMP set joining request to the base stations in the candidate set;
selecting a base station from the candidate set according to information returned by the base station and adding the base station into the CoMP set;
wherein the processing unit is further to:
if the signal intensity in the CoMP set is smaller than the minimum signal intensity of the base stations in the candidate set and the number of the base stations with the difference value reaching a third threshold value reaches a set second threshold value, emptying the CoMP set; or
And if the signal intensity in the CoMP set is smaller than the minimum value and the number of the base stations with the difference value reaching the third threshold value reaches the set second threshold value, emptying the CoMP set.
7. The device of claim 6, wherein the processing unit is to:
sending CoMP set joining requests to a plurality of base stations in the candidate set;
when selecting base stations from the candidate set according to information returned by the base stations to add into the CoMP set, if the number of the base stations which are returned to be added is larger than N, selecting N base stations from the base stations which are returned to be added to add into the CoMP set, wherein N is the difference between the maximum number of the base stations of the CoMP set and the number of the base stations which are added into the CoMP set; or if the number of the base stations which return to agree to join is not more than N, adding the base stations which return to agree to join into the CoMP set.
8. The device of claim 6, wherein the processing unit is to:
selecting the first N base stations according to the sequence of the signal intensity from large to small, wherein N is the difference between the maximum number of the base stations of the CoMP set and the number of the base stations added into the CoMP set;
and sending a CoMP set joining request to the selected base station.
9. An apparatus for constructing a CoMP set, the apparatus comprising: a processing unit and a storage unit, wherein the storage unit stores program code that, when executed by the processing unit, causes the processing unit to perform the following:
receiving a CoMP set adding request sent by a terminal, wherein a base station is a base station in a candidate set, and the candidate set is a set which is generated by the terminal according to the signal intensity between the terminal and the base station and comprises at least two base stations;
judging whether to join a CoMP set or not;
after the CoMP set is determined to be added, the terminal is informed of the agreement of adding the CoMP set, so that the terminal selects a base station from the candidate set to add into the CoMP set according to the information returned by the base station, and the CoMP set is cleared when the following conditions are met:
the number of base stations of which the signal intensity is smaller than the minimum signal intensity of the base stations in the candidate set and the difference value reaches a third threshold value in the CoMP set reaches a set second threshold value; or
And the number of the base stations of which the signal intensity is smaller than the minimum value and the difference value reaches the third threshold value in the CoMP set reaches the set second threshold value.
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