CN108401223B - Cell switching method and device - Google Patents
Cell switching method and device Download PDFInfo
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- CN108401223B CN108401223B CN201710069563.XA CN201710069563A CN108401223B CN 108401223 B CN108401223 B CN 108401223B CN 201710069563 A CN201710069563 A CN 201710069563A CN 108401223 B CN108401223 B CN 108401223B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/025—Services making use of location information using location based information parameters
- H04W4/027—Services making use of location information using location based information parameters using movement velocity, acceleration information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/121—Wireless traffic scheduling for groups of terminals or users
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/535—Allocation or scheduling criteria for wireless resources based on resource usage policies
Abstract
The embodiment of the invention provides a cell switching method and a device, wherein the method comprises the following steps: receiving a cell switching request sent by a source cell, wherein the cell switching request carries the rate grade of a mobile terminal; allocating channel resources to the mobile terminal according to the rate grade in the cell switching request; and switching the mobile terminal from a source cell to a current cell. Therefore, the problems that the target cell cannot schedule enough physical resources in time according to the service rate of the mobile terminal user in the source cell, so that the rate drops and the climbing is slow after the mobile terminal is switched to the target cell are solved, and the beneficial effect that the rate is improved in the process of switching the mobile terminal to the target cell is achieved.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a cell switching method and apparatus.
Background
In a TD-LTE (Time Division Long Term Evolution) mobile network, a mobile terminal may continuously interact with a base station, and determine whether to perform cell switching according to the strength of a signal received from the base station. When the strength of the signal received by the mobile terminal from the base station is weakened to a certain degree or the load of the current base station is too large, cell switching is carried out, and the cell corresponding to the current base station is switched to another cell.
In the prior art, in an X2 handover procedure shown in fig. 1 and an S1 handover procedure shown in fig. 2, when a Source cell corresponding to a Source base station (Source eNodeB) receives a measurement report reported by a mobile terminal (UE) or a Source cell is overloaded, a step of switching from the Source cell to a target cell mainly includes: firstly, directly sending a Handover Request (Handover Request) to a Target base station (Target eNodeB), or forwarding the Handover Request to the Target base station through an MME (Mobility Management Entity); then, after the target base station receives the switching request, scheduling the priority according to the user QCI (quality of service Identifier, system quality level Identifier), scheduling the users in the same QCI level by adopting three algorithms of polling, MAX C/I (Max Carrier-Interference ratio) and proportional fairness, and allocating the channel resources of the target base station corresponding to the target cell.
However, the target cell cannot schedule sufficient physical resources in time according to the service rate of the mobile terminal user in the source cell, which causes the problems of rate drop, slow ramp-up and rate loss after the mobile terminal is switched to the target cell, thereby making the perception of the high-speed service user in the mobile communication network poor.
Disclosure of Invention
In view of the above, the present invention is proposed to provide a cell handover method and apparatus that solves the above problems, or at least partially solves the above problems.
According to a first aspect of the present invention, there is provided a cell handover method, including:
receiving a cell switching request sent by a source cell, wherein the cell switching request carries the rate grade of a mobile terminal;
allocating channel resources to the mobile terminal according to the rate grade in the cell switching request;
and switching the mobile terminal from a source cell to a current cell.
Optionally, the step of allocating channel resources to the mobile terminal according to the rate class in the cell handover request includes:
reading the rate level from the cell switching request;
if the rate grade is a first rate grade, allocating channel resources for the mobile terminal by using any one of methods of polling, maximum carrier-to-interference ratio and proportional fairness;
if the rate grade is a second rate grade, allocating channel resources to the mobile terminal according to a first threshold rate;
if the rate grade is a third rate grade, allocating channel resources for the mobile terminal according to a second threshold rate;
and if the rate grade is a fourth rate grade, allocating channel resources to the mobile terminal according to the highest priority.
Optionally, the step of allocating channel resources to the mobile terminal according to the first threshold rate includes:
judging whether the current time exceeds the timing time corresponding to the first timer or not;
if the current resource exceeds the threshold value, any algorithm of polling, maximum carrier-to-interference ratio and proportional fairness is used for distributing the channel resources for the mobile terminal.
Optionally, the step of allocating channel resources to the mobile terminal according to the second threshold rate includes:
judging whether the current time exceeds the timing time of the second timer;
if the current resource exceeds the threshold value, any algorithm of polling, maximum carrier-to-interference ratio and proportional fairness is used for distributing the channel resources for the mobile terminal.
According to a second aspect of the present invention, there is provided another cell handover method, including:
before sending a cell switching request, determining the rate grade of a mobile terminal according to the service rate of the mobile terminal in the current cell;
and sending the cell switching request carrying the rate grade to a target cell so as to switch the mobile terminal from the current cell to the target cell.
Optionally, before sending the cell handover request, the step of determining the rate class of the mobile terminal according to the service rate of the mobile terminal in the current cell includes:
counting the average service rate of the mobile terminal in the specified time period of the current cell;
if the average service rate is less than or equal to a first rate threshold, the rate grade of the mobile terminal is a first rate grade;
if the average service rate is greater than a first rate threshold and less than or equal to a second rate threshold, the rate grade of the mobile terminal is a second rate grade;
if the average service rate is greater than a second rate threshold and less than or equal to a third rate threshold, the rate grade of the mobile terminal is a third rate grade;
and if the average service rate is greater than a third rate threshold, the rate grade of the mobile terminal is a fourth rate grade.
According to a third aspect of the present invention, there is provided a cell switching apparatus comprising:
a switching request receiving module, configured to receive a cell switching request sent by a source cell, where the cell switching request carries a rate level of a mobile terminal;
a channel resource allocation module, configured to allocate channel resources to the mobile terminal according to the rate level in the cell handover request;
and the switching module is used for switching the mobile terminal from a source cell to the current cell.
Optionally, the channel resource allocation module includes:
a rate class reading submodule for reading a rate class from the cell switching request;
a first channel resource allocation submodule, configured to allocate channel resources to the mobile terminal by using any one of polling, maximum carrier-to-interference ratio, and proportional fairness if the rate level is a first rate level;
a second channel resource allocation submodule, configured to allocate channel resources to the mobile terminal according to a first threshold rate if the rate level is a second rate level;
a third channel resource allocation submodule, configured to allocate channel resources to the mobile terminal according to a second threshold rate if the rate level is a third rate level;
and the fourth channel resource allocation submodule is used for allocating the channel resources to the mobile terminal according to the highest priority if the rate grade is the fourth rate grade.
Optionally, the second channel resource allocation sub-module includes:
the first timing judgment unit is used for judging whether the current time exceeds the timing time corresponding to the first timer or not;
and the first timeout allocation unit is used for allocating channel resources to the mobile terminal by using any one algorithm of polling, maximum carrier-to-interference ratio and proportional fairness if the channel resources exceed the threshold.
Optionally, the third channel resource allocation sub-module includes:
the second timing judgment unit is used for judging whether the current time exceeds the timing time of the second timer;
and the second timeout allocation unit is used for allocating channel resources to the mobile terminal by using any one algorithm of polling, maximum carrier-to-interference ratio and proportional fairness if the channel resources exceed the threshold.
According to a fourth aspect of the present invention, there is provided another cell switching apparatus, comprising:
a rate grade determining module, configured to determine a rate grade of the mobile terminal according to a service rate of the mobile terminal in a current cell before sending the cell handover request;
and the switching request sending module is used for sending the cell switching request carrying the rate grade to a target cell so as to switch the mobile terminal from the current cell to the target cell.
Optionally, the rate level determining module includes:
the average service rate counting submodule is used for counting the average service rate of the mobile terminal in the appointed time period of the current cell;
a first rate level determining submodule, configured to determine, if the average service rate is less than or equal to a first rate threshold, that the rate level of the mobile terminal is a first rate level;
a second rate class determining submodule, configured to determine, if the average service rate is greater than a first rate threshold and is less than or equal to a second rate threshold, that the rate class of the mobile terminal is a second rate class;
a third rate level determining submodule, configured to determine, if the average service rate is greater than the second rate threshold and is less than or equal to a third rate threshold, that the rate level of the mobile terminal is a third rate level;
and a fourth rate level determining submodule, configured to determine the rate level of the mobile terminal as a fourth rate level if the average service rate is greater than a third rate threshold.
The embodiment of the invention has the following advantages:
according to the cell switching method and the cell switching device, a cell switching request sent by a source cell can be received, wherein the cell switching request carries the rate grade of a mobile terminal; allocating channel resources to the mobile terminal according to the rate grade in the cell switching request; and switching the mobile terminal from a source cell to a current cell. Therefore, the problems that the target cell cannot schedule enough physical resources in time according to the service rate of the mobile terminal user in the source cell, so that the rate drops and the climbing is slow after the mobile terminal is switched to the target cell are solved, and the beneficial effect that the rate is improved in the process of switching the mobile terminal to the target cell is achieved.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 shows a handover flow chart in the prior art;
fig. 2 shows another handover flow diagram in the prior art;
fig. 3 is a flowchart illustrating a first step of a cell handover method according to the present invention;
fig. 4 is a flowchart illustrating the steps of a second embodiment of a cell handover method according to the present invention;
fig. 5 shows a flowchart of the third step of an embodiment of a cell switching method according to the present invention;
fig. 6 shows a flowchart of the fourth step of an embodiment of a cell switching method according to the present invention;
fig. 7 shows a flowchart of the fifth step of an embodiment of a cell switching method according to the present invention;
fig. 8 is a block diagram of a sixth embodiment of a cell switching apparatus according to the present invention;
fig. 9 is a block diagram of a seventh embodiment of a cell switching apparatus according to the present invention;
fig. 10 is a block diagram of an eighth embodiment of a cell switching apparatus according to the present invention;
fig. 11 is a block diagram of a ninth embodiment of a cell switching apparatus according to the present invention;
fig. 12 is a block diagram of a cell switching apparatus according to a tenth embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Example one
Referring to fig. 3, a flowchart illustrating a first step of a cell handover method according to a first embodiment of the present invention is shown, which may specifically include the following steps:
The embodiment of the present invention is explained in detail from the target cell side.
In a mobile communication network, mobile terminals are often connected to a core network through base stations, and the area in which a base station is responsible is called a cell. When the mobile terminal moves, the mobile terminal continuously interacts with the base station, and judges whether cell switching is needed according to the strength of the signal received from the base station. If the signal strength received from the cell a is weak and the signal strength received from the cell B is strong, the handover is performed from the cell a to the cell B, where the cell a is used as the source cell and the cell B is used as the target cell.
The rate grade is a grade divided according to the rate of the mobile terminal in the source cell. The larger the rate, the higher the rate level; the smaller the rate, the lower the rate level. In the embodiment of the invention, more channel resources are allocated to the mobile terminal with higher rate grade after the mobile terminal is switched to the target cell; and allocating less channel resources to the mobile terminal with lower rate grade after switching to the target cell.
Wherein, the channel resource is the bandwidth resource of the target cell.
In the embodiment of the invention, according to a certain rule, a larger bandwidth resource is allocated to the mobile terminal with higher rate grade, and a smaller bandwidth resource is allocated to the mobile terminal with lower rate grade.
And 103, switching the mobile terminal from a source cell to a current cell.
Specifically, the communication service of the mobile terminal is switched from the source cell to the current cell, so that the mobile terminal interacts with the core network of the communication network through the current cell.
Wherein, the current cell is the target cell.
The communication service includes a call, a short message, a data traffic service, etc. of the mobile terminal.
In the embodiment of the invention, a cell switching request sent by a source cell can be received, wherein the cell switching request carries the rate grade of a mobile terminal; allocating channel resources to the mobile terminal according to the rate grade in the cell switching request; and switching the mobile terminal from a source cell to a current cell. Therefore, the problems that the target cell cannot schedule enough physical resources in time according to the service rate of the mobile terminal user in the source cell, and the mobile terminal has speed pit falling, slow climbing and speed loss after being switched to the target cell are solved, and the beneficial effects of avoiding speed pit falling, slow climbing and speed loss after the cell is switched are achieved.
Example two
Referring to fig. 4, a flowchart illustrating a step of a second embodiment of a cell handover method according to the present invention is shown, which may specifically include the following steps:
The embodiment of the present invention is explained in detail from the target cell side.
This step can refer to the detailed description of step 101, and is not described herein again.
Specifically, the bits corresponding to the rate class are read from the specified field of the cell switch request. And determining the corresponding rate grade according to the definition rule of the bit.
For example, if the rate levels are divided by two bits, 00 corresponds to a low rate level, 01 corresponds to a higher rate level, 10 corresponds to a higher rate level, and 11 corresponds to a highest rate level.
Where the first rate level corresponds to a low rate, corresponding to bit 00.
Polling is a channel allocation algorithm where users share channel resources in turn, without taking into account instantaneous channel conditions. Conventionally, polling is used for performing the same indiscriminate circular scheduling service on different packet traffic queues, and peer-to-peer long traffic queues can fairly allocate bandwidth, but unequal-length traffic queues cannot fairly allocate bandwidth.
The weighted polling allocates a weight value for each service flow queue, when polling to a certain service flow queue, the number of the forwarding packets of the service flow queue is determined according to the weight value of the service flow queue, rather than only one forwarding packet is forwarded. Since weighted polling is based on conventional polling, it is fair to show only over a time greater than one polling period, and it is also not fair to allocate bandwidth when the packet sizes of the traffic queues are unequal.
The difference polling can solve the unfairness of the polling scheduling in the variable-length service flow queue environment by distributing the service weight value to each service flow queue. The service flow queue I in each scheduling cycle can receive a quota of service Q. In the first round of circular scheduling, if the length of the head group of the service flow queue I is larger than Q, the service cannot be obtained in the current round, and the service volume quota Q is accumulated to the next round of group; if the length of the head group is smaller than Q, the group can receive service, and the unused service quality quota of the round is accumulated to the next round; and so on in subsequent scheduling cycles. Therefore, the service quantity obtained by each service flow queue does not exceed the quota even if the packet length is different, and the mutual influence among the service flows is isolated. The difference polling algorithm improves the fairness of the algorithm in the variable-length grouping environment and does not increase the original complexity of polling. However, the differential polling has a significant disadvantage in terms of delay characteristics, i.e., the service order of the queues is statically specified in each scheduling cycle and cannot be dynamically adjusted according to the attributes of the services, so that it is difficult to efficiently support real-time services.
And the emergency polling allocates U for each service flow queue, calculates the U value of each service flow queue before each scheduling cycle, and provides service for each queue according to the size sequence of the U values. Although the emergency polling improves the delay characteristics, its original fairness problem still exists.
At each scheduling time, the scheduler can sort the carrier-to-interference ratios of all the users to be scheduled, and then the scheduler can select the user with the best channel quality for scheduling, so that the system can always schedule the best user, the performance of the system is guaranteed to be maximized, and the resource utilization rate is highest. The maximum carrier-to-interference ratio algorithm is as follows:
k＝arg(max(Ri(t))) (1)
where k is the scheduled user, Ri(t) is the instantaneous transmission rate of the ith user at time t.
It can be seen that the maximum carrier-to-interference ratio algorithm is a scheduling algorithm for pursuing the maximization of system performance, and all resources are allocated to the terminal with the best signal quality in a scheduling period, so that the system throughput can reach the maximum value. However, the method does not consider fairness at all, and for a terminal at a cell edge or a deep drop, the terminal cannot be scheduled for a long time due to poor signal quality, so that the terminal is starved.
The proportional fairness algorithm meets the requirement of a high-speed data service of a terminal with good channel quality as much as possible, and also gives consideration to the use experience of the terminal with poor channel quality. The basic idea of the algorithm is to consider the ratio of the instantaneous rate to the long-term average rate when selecting the users, and adjust different users by using the weight value, so as to achieve the purpose of simultaneously considering the system performance and the user experience. The algorithm allocates a priority to each user in a cell, and the system schedules the user with the maximum priority at any time, wherein the mathematical expression of the proportional fairness algorithm is as follows:
where k is the scheduled user, Ri(T) is the instantaneous transmission rate of the ith user at time T, Ti(t) is the cumulative average rate of the ith user at time t. After scheduling is completed, the priority factor of the user needs to be updated. If there are multiple users in the cell, when the system continuously schedules a user with better channel quality, Ti(t) will gradually increase so that the priority level gradually decreases, and the system will schedule other users with higher priority. If the channel quality of a certain user is poor and the system scheduling is not obtained for a long time, the average throughput T of the user isi(t) will decrease and thus the priority will increase, giving the user the opportunity to be scheduled. The proportional fairness algorithm comprehensively considers two factors of fairness and system performance, and is an algorithm with better performance.
Where the second rate level corresponds to a higher rate, corresponding to bit 01.
In an embodiment of the present invention, the first threshold rate may be set by a user on a designated interface. It is understood that the default values may be set according to actual application scenarios.
Specifically, the bandwidth allocated to the mobile terminal is less than or equal to the first threshold rate and must not be higher than the first threshold rate. And may optimally be equal to the first threshold rate.
Optionally, in another embodiment of the present invention, step 204 comprises sub-steps 2041 to 2042:
substep 2041, determine whether the current time exceeds the timing time of the first timer.
The timing time of the first timer can be set according to an actual application scenario.
In the embodiment of the invention, before the current time does not reach the timing time of the first timer, the bandwidth is allocated according to the first threshold rate; after the current time exceeds the timing time of the first timer, the bandwidth is allocated by adopting any algorithm of polling, maximum carrier-to-interference ratio and proportional fairness.
And a substep 2042, if the current resource is exceeded, allocating channel resources to the mobile terminal by using any one algorithm of polling, maximum carrier-to-interference ratio and proportional fairness.
This step can refer to the detailed description of step 203, and is not described herein again.
Where the third rate level corresponds to a higher rate, corresponding to bit 10.
In the embodiment of the invention, the second door speed limit rate can be set by a user on a designated interface. It is understood that the default values may be set according to actual application scenarios.
Specifically, the bandwidth allocated to the mobile terminal is less than or equal to the second threshold rate and must not be higher than the second threshold rate. And most preferably, may be equal to the second door rate limit.
It will be appreciated that in practical applications the second threshold rate is greater than the first threshold rate.
Optionally, in another embodiment of the present invention, step 205 comprises sub-steps 2051 to 2052:
and a substep 2051 of determining whether the current time exceeds the timing time of the second timer.
The timing time of the second timer can be set according to an actual application scenario.
In the embodiment of the invention, before the current time does not reach the timing time of the second timer, the bandwidth is distributed according to the second door speed limit rate; after the current time exceeds the timing time of the second timer, the bandwidth is distributed by adopting any algorithm of polling, maximum carrier-to-interference ratio and proportional fairness.
It is understood that in practical applications, the timing time of the second timer is greater than the timing time of the first timer. Therefore, users with high rate grade can be better ensured to obtain more bandwidth resources.
And a sub-step 2052, if the channel resources are not allocated to the mobile terminal, allocating the channel resources to the mobile terminal by using any one algorithm of polling, maximum carrier-to-interference ratio and proportional fairness.
This step can refer to the detailed description of step 203, and is not described herein again.
And step 206, if the rate level is the fourth rate level, allocating channel resources to the mobile terminal according to the highest priority.
Where the fourth rate level corresponds to the highest rate, corresponding to bit 11.
In the embodiment of the invention, the bandwidth resources are preferentially allocated to the mobile terminal of the fourth rate class, thereby ensuring that the service of the high-rate user achieves the non-perception switching.
This step can refer to the detailed description of step 103, which is not repeated herein.
In the embodiment of the invention, a target cell receives a cell switching request sent by a source cell, and the rate grade of a mobile terminal is carried in the switching request of the source cell; according to the rate grade in the switching request of the source cell, channel resources are allocated to the mobile terminal in the target cell in advance; to reduce the rate loss of the mobile terminal during handover. Therefore, the problems that the target cell cannot schedule enough physical resources in time according to the service rate of the mobile terminal user in the source cell, so that the rate drops and the climbing is slow after the mobile terminal is switched to the target cell are solved, and the beneficial effect that the rate is improved in the process of switching the mobile terminal to the target cell is achieved. In addition, channel resources can be flexibly allocated to users with different rate levels according to practical application scenarios. EXAMPLE III
Referring to fig. 5, a flowchart illustrating a third step of an embodiment of a cell handover method according to the present invention is shown, which may specifically include the following steps:
The embodiment of the present invention is explained in detail from the source cell side.
Wherein, the current cell is the source cell.
Specifically, first, a rate class is determined; then, dividing a rate range corresponding to the rate grade; and finally, when the source cell determines to switch the mobile terminal to the target cell, counting the average service rate in a specified time period before the current time, and determining the corresponding rate grade according to the rate range of the average service rate.
It can be understood that a mobile terminal with a higher service rate corresponds to a higher rate class, and a mobile terminal with a lower service rate corresponds to a lower rate class.
Specifically, after the rate class of the mobile terminal is determined, an identifier representing the rate class is carried in a cell handover request and sent to the target cell. Therefore, the target cell can reasonably distribute the bandwidth resources for the mobile terminal according to the total bandwidth resources of the target cell and the rate grade of the mobile terminal.
In the embodiment of the invention, before sending the cell switching request, the rate grade of the mobile terminal can be determined according to the service rate of the mobile terminal in the current cell; and sending the cell switching request carrying the rate grade to a target cell so as to switch the mobile terminal from the current cell to the target cell. Therefore, the problems that the target cell cannot schedule enough physical resources in time according to the service rate of the mobile terminal user in the source cell, so that the rate drops and the climbing is slow after the mobile terminal is switched to the target cell are solved, and the beneficial effect that the rate is improved in the process of switching the mobile terminal to the target cell is achieved.
Example four
Referring to fig. 6, a flowchart illustrating a fourth step of the cell handover method according to the fourth embodiment of the present invention is shown, which may specifically include the following steps:
The embodiment of the present invention is explained in detail from the source cell side.
The specified time period may be set according to an actual application scenario, and is not limited in the embodiment of the present invention.
The traffic rate is the instantaneous transmission rate of the mobile terminal at a certain moment, and the average traffic rate is the average of the traffic rates of the mobile terminal in a specified time period.
In the embodiment of the invention, the average service rate in a specified time period is used as a standard for dividing the rate grade of the mobile terminal. If the average service rate is larger, the rate grade is higher; otherwise, the smaller the average traffic rate, the lower the rate level.
The first rate threshold may be set according to an actual application scenario, and is not limited in the embodiment of the present invention.
In an embodiment of the present invention, the rate level is represented by two bits, so that the two bits corresponding to the first rate level are 00.
It will be appreciated that the mobile terminals of the first rate class are mobile terminals having a lower traffic rate.
The first rate threshold may be set according to an actual application scenario, and is not limited in the embodiment of the present invention.
The second rate level corresponds to two bits of 01.
It will be appreciated that the mobile terminals of the first rate class are mobile terminals having a higher traffic rate and the mobile terminals of the second rate class have a higher priority than the mobile terminals of the first rate class.
The first rate threshold may be set according to an actual application scenario, and is not limited in the embodiment of the present invention.
The third rate level corresponds to two bits of 10.
It will be appreciated that the mobile terminals of the third rate class are mobile terminals having a higher traffic rate, the mobile terminals of the third rate class having a higher priority than the mobile terminals of the second rate class.
The first rate threshold may be set according to an actual application scenario, and is not limited in the embodiment of the present invention.
The fourth rate level corresponds to two bits of 11.
It is to be understood that the mobile terminal of the fourth rate class is the mobile terminal with the highest traffic rate, and the mobile terminal of the fourth rate class has the highest priority.
Thus, it can be seen that the mobile terminals are ordered according to the priority of using the channel resources from high to low: a mobile terminal of a fourth rate class, a mobile terminal of a third rate class, a mobile terminal of a second rate class, a mobile terminal of a first rate class.
Of course, since the service rate of the mobile terminal is constantly changing, the service rate is high in a period of time, for example, the user downloads video, audio or other files in the period of time, and the service rate is low in another period of time, for example, the user logs in only some basic applications in the period of time and does not download big data. Therefore, different rate grades are provided at different times, and the rate grade is determined according to a specified time period before the current time when the cell is switched.
This step can refer to the detailed description of step 302, and is not described herein again.
In the embodiment of the invention, before sending the cell switching request, the rate grade of the mobile terminal can be determined according to the service rate of the mobile terminal in the current cell; and sending the cell switching request carrying the rate grade to a target cell so as to switch the mobile terminal from the current cell to the target cell. Therefore, the problems that the target cell cannot schedule enough physical resources in time according to the service rate of the mobile terminal user in the source cell, so that the rate drops and the climbing is slow after the mobile terminal is switched to the target cell are solved, and the beneficial effect that the rate is improved in the process of switching the mobile terminal to the target cell is achieved. In addition, the rate classes can be flexibly classified according to the average service rate of the mobile terminal before cell switching.
EXAMPLE five
Referring to fig. 7, a flowchart illustrating a fifth step of an embodiment of a cell handover method according to the present invention is shown, which may specifically include the following steps:
The embodiment of the invention is explained in detail at both sides of the source cell and the target cell.
And 505, switching the mobile terminal from a source cell to a current cell.
In the embodiment of the invention, before sending the cell switching request, the rate grade of the mobile terminal can be determined according to the service rate of the mobile terminal in the current cell; sending the cell switching request carrying the rate grade to a target cell so as to switch the mobile terminal from the current cell to the target cell; receiving a cell switching request sent by a source cell, wherein the cell switching request carries the rate grade of a mobile terminal; and switching the mobile terminal from a source cell to a current cell. Therefore, the problems that the target cell cannot schedule enough physical resources in time according to the service rate of the mobile terminal user in the source cell, so that the rate drops and the climbing is slow after the mobile terminal is switched to the target cell are solved, and the beneficial effect that the rate is improved in the process of switching the mobile terminal to the target cell is achieved.
EXAMPLE six
Referring to fig. 8, a block diagram of a sixth embodiment of a cell switching apparatus according to the present invention is shown, which may specifically include the following modules:
a handover request receiving module 601, configured to receive a cell handover request sent by a source cell, where the cell handover request carries a rate level of a mobile terminal.
A channel resource allocation module 602, configured to allocate channel resources to the mobile terminal according to the rate level in the cell handover request.
A switching module 603, configured to switch the mobile terminal from a source cell to a current cell.
In the embodiment of the invention, a cell switching request sent by a source cell can be received, wherein the cell switching request carries the rate grade of a mobile terminal; allocating channel resources to the mobile terminal according to the rate grade in the cell switching request; and switching the mobile terminal from a source cell to a current cell. Therefore, the problems that the target cell cannot schedule enough physical resources in time according to the service rate of the mobile terminal user in the source cell, so that the rate drops and the climbing is slow after the mobile terminal is switched to the target cell are solved, and the beneficial effect that the rate is improved in the process of switching the mobile terminal to the target cell is achieved.
EXAMPLE seven
Referring to fig. 9, a block diagram of a seventh embodiment of a cell switching apparatus according to the present invention is shown, which may specifically include the following modules:
a handover request receiving module 701, configured to receive a cell handover request sent by a source cell, where the cell handover request carries a rate level of a mobile terminal.
A channel resource allocation module 702, configured to allocate channel resources to the mobile terminal according to the rate level in the cell handover request. The method comprises the following steps:
a rate class reading sub-module 7021, configured to read a rate class from the cell handover request.
A first channel resource allocation submodule 7022, configured to allocate, if the rate level is the first rate level, the channel resource to the mobile terminal by using any one of polling, maximum carrier-to-interference ratio, and proportional fairness.
And a second channel resource allocation sub-module 7023, configured to allocate, if the rate level is the second rate level, channel resources to the mobile terminal according to the first threshold rate.
A third channel resource allocation sub-module 7024, configured to allocate, if the rate level is a third rate level, channel resources to the mobile terminal according to a second threshold rate.
A fourth channel resource allocation sub-module 7025, configured to allocate channel resources to the mobile terminal according to the highest priority if the rate level is a fourth rate level.
A switching module 703, configured to switch the mobile terminal from a source cell to a current cell.
Optionally, in another embodiment of the present invention, the second channel resource allocation submodule 7023 includes:
and the first timing judgment unit is used for judging whether the current time exceeds the timing time of the first timer.
And the first timeout allocation unit is used for allocating channel resources to the mobile terminal by using any one algorithm of polling, maximum carrier-to-interference ratio and proportional fairness if the channel resources exceed the threshold.
Optionally, in another embodiment of the present invention, the third channel resource allocation submodule 7024 includes:
and the second timing judgment unit is used for judging whether the current time exceeds the timing time of the second timer.
And the second timeout allocation unit is used for allocating channel resources to the mobile terminal by using any one algorithm of polling, maximum carrier-to-interference ratio and proportional fairness if the channel resources exceed the threshold.
In the embodiment of the invention, a cell switching request sent by a source cell can be received, wherein the cell switching request carries the rate grade of a mobile terminal; allocating channel resources to the mobile terminal according to the rate grade in the cell switching request; and switching the mobile terminal from a source cell to a current cell. Therefore, the problems that the target cell cannot schedule enough physical resources in time according to the service rate of the mobile terminal user in the source cell, so that the rate drops and the climbing is slow after the mobile terminal is switched to the target cell are solved, and the beneficial effect that the rate is improved in the process of switching the mobile terminal to the target cell is achieved. In addition, channel resources can be flexibly allocated to users with different rate levels according to practical application scenarios.
Example eight
Referring to fig. 10, a block diagram of an eighth embodiment of a cell switching apparatus according to the present invention is shown, which may specifically include the following modules:
a rate class determining module 801, configured to determine a rate class of the mobile terminal according to a service rate of the mobile terminal in a current cell before sending the cell handover request.
A handover request sending module 802, configured to send a cell handover request carrying the rate class to a target cell, so as to handover the mobile terminal from a current cell to the target cell.
In the embodiment of the invention, before sending the cell switching request, the rate grade of the mobile terminal can be determined according to the service rate of the mobile terminal in the current cell; and sending the cell switching request carrying the rate grade to a target cell so as to switch the mobile terminal from the current cell to the target cell. Therefore, the problems that the target cell cannot schedule enough physical resources in time according to the service rate of the mobile terminal user in the source cell, so that the rate drops and the climbing is slow after the mobile terminal is switched to the target cell are solved, and the beneficial effect that the rate is improved in the process of switching the mobile terminal to the target cell is achieved.
Example nine
Referring to fig. 11, a block diagram of a ninth embodiment of a cell switching apparatus according to the present invention is shown, which may specifically include the following modules:
a rate class determining module 901, configured to determine a rate class of the mobile terminal according to a service rate of the mobile terminal in a current cell before sending the cell handover request. The method comprises the following steps:
and the average service rate counting submodule 9011 is configured to count the average service rate of the mobile terminal in the specified time period of the current cell.
A first rate class determining submodule 9012, configured to determine, if the average service rate is less than or equal to a first rate threshold, that the rate class of the mobile terminal is a first rate class.
A second rate class determining submodule 9013, configured to determine, if the average service rate is greater than the first rate threshold and is less than or equal to a second rate threshold, that the rate class of the mobile terminal is a second rate class.
A third rate class determining submodule 9014, configured to determine that the rate class of the mobile terminal is the third rate class if the average service rate is greater than the second rate threshold and is less than or equal to the third rate threshold.
A fourth rate class determination submodule 9015, configured to determine that the rate class of the mobile terminal is the fourth rate class if the average service rate is greater than the third rate threshold.
A handover request sending module 902, configured to send the cell handover request carrying the rate class to a target cell, so as to handover the mobile terminal from a current cell to the target cell.
In the embodiment of the invention, before sending the cell switching request, the rate grade of the mobile terminal can be determined according to the service rate of the mobile terminal in the current cell; and sending the cell switching request carrying the rate grade to a target cell so as to switch the mobile terminal from the current cell to the target cell. Therefore, the problems that the target cell cannot schedule enough physical resources in time according to the service rate of the mobile terminal user in the source cell, so that the rate drops and the climbing is slow after the mobile terminal is switched to the target cell are solved, and the beneficial effect that the rate is improved in the process of switching the mobile terminal to the target cell is achieved. In addition, the rate classes can be flexibly classified according to the average service rate of the mobile terminal before cell switching.
Example ten
Referring to fig. 12, a block diagram of a tenth embodiment of a cell switching apparatus according to the present invention is shown, which may specifically include the following modules:
a rate class determining module 1001, configured to determine a rate class of a mobile terminal according to a service rate of the mobile terminal in a current cell before sending a cell handover request.
A handover request sending module 1002, configured to send a cell handover request carrying the rate class to a target cell, so as to handover the mobile terminal from a current cell to the target cell.
A handover request receiving module 1003, configured to receive a cell handover request sent by a source cell, where the cell handover request carries a rate level of a mobile terminal.
A channel resource allocating module 1004, configured to allocate channel resources to the mobile terminal according to the rate level in the cell handover request.
A switching module 1005, configured to switch the mobile terminal from a source cell to a current cell.
In the embodiment of the invention, before sending the cell switching request, the rate grade of the mobile terminal can be determined according to the service rate of the mobile terminal in the current cell; sending the cell switching request carrying the rate grade to a target cell so as to switch the mobile terminal from the current cell to the target cell; receiving a cell switching request sent by a source cell, wherein the cell switching request carries the rate grade of a mobile terminal; and switching the mobile terminal from a source cell to a current cell. Therefore, the problems that the target cell cannot schedule enough physical resources in time according to the service rate of the mobile terminal user in the source cell, so that the rate drops and the climbing is slow after the mobile terminal is switched to the target cell are solved, and the beneficial effect that the rate is improved in the process of switching the mobile terminal to the target cell is achieved.
For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.
The algorithms and displays presented herein are not inherently related to any particular computer, virtual machine, or other apparatus. Various general purpose systems may also be used with this teaching. The required structure for constructing such a system will be apparent from the description above. Moreover, the present invention is not directed to any particular programming language. It is appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any descriptions of specific languages are provided above to disclose the best mode of the invention.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
The various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. It will be appreciated by those skilled in the art that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components in a cell switching apparatus according to embodiments of the present invention. The present invention may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present invention may be stored on computer-readable media or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
Claims (8)
1. A cell switching method is applied to a target cell, and is characterized by comprising the following steps:
receiving a cell switching request sent by a source cell, wherein the cell switching request carries the rate grade of a mobile terminal; the rate grade is a grade divided according to the rate of the mobile terminal in the source cell; the larger the rate, the higher the rate level; the smaller the rate, the lower the rate level;
allocating channel resources to the mobile terminal according to the rate grade in the cell switching request;
switching the mobile terminal from a source cell to a current cell;
after the mobile terminal with the higher rate grade is switched to the current cell, more channel resources are allocated to the mobile terminal; after the mobile terminal with the lower rate grade is switched to the current cell, less channel resources are allocated to the mobile terminal;
the step of allocating channel resources to the mobile terminal according to the rate level in the cell switching request includes:
reading the rate level from the cell switching request;
if the rate grade is a first rate grade, allocating channel resources for the mobile terminal by using any one of methods of polling, maximum carrier-to-interference ratio and proportional fairness;
if the rate grade is a second rate grade, allocating channel resources to the mobile terminal according to a first threshold rate;
if the rate grade is a third rate grade, allocating channel resources for the mobile terminal according to a second threshold rate;
if the rate grade is a fourth rate grade, allocating channel resources to the mobile terminal according to the highest priority;
the step of allocating channel resources to the mobile terminal according to the first threshold rate includes:
judging whether the current time exceeds the timing time corresponding to the first timer or not;
if the current resource exceeds the threshold value, any algorithm of polling, maximum carrier-to-interference ratio and proportional fairness is used for distributing the channel resources for the mobile terminal.
2. The method of claim 1, wherein the step of allocating channel resources to the mobile terminal at the second threshold rate comprises:
judging whether the current time exceeds the timing time of the second timer;
if the current resource exceeds the threshold value, any algorithm of polling, maximum carrier-to-interference ratio and proportional fairness is used for distributing the channel resources for the mobile terminal.
3. A cell switching method is applied to a source cell, and is characterized by comprising the following steps:
before sending a cell switching request, determining the rate grade of a mobile terminal according to the service rate of the mobile terminal in the current cell; the rate grade is a grade divided according to the rate of the mobile terminal in the current cell; the larger the rate, the higher the rate level;
sending the cell switching request carrying the rate grade to a target cell so that the target cell allocates channel resources for the mobile terminal according to the rate grade in the cell switching request, and further switching the mobile terminal from the current cell to the target cell;
after the mobile terminal with the higher rate grade is switched to a target cell, more channel resources are allocated to the mobile terminal; after the mobile terminal with the lower rate grade is switched to a target cell, less channel resources are allocated to the mobile terminal;
wherein, the step of allocating channel resource for the mobile terminal by the target cell according to the rate grade in the cell switching request comprises:
reading the rate level from the cell switching request;
if the rate grade is a first rate grade, allocating channel resources for the mobile terminal by using any one of methods of polling, maximum carrier-to-interference ratio and proportional fairness;
if the rate grade is a second rate grade, allocating channel resources to the mobile terminal according to a first threshold rate;
if the rate grade is a third rate grade, allocating channel resources for the mobile terminal according to a second threshold rate;
if the rate grade is a fourth rate grade, allocating channel resources to the mobile terminal according to the highest priority;
the step of allocating channel resources to the mobile terminal according to the first threshold rate includes:
judging whether the current time exceeds the timing time corresponding to the first timer or not;
if the current resource exceeds the threshold value, any algorithm of polling, maximum carrier-to-interference ratio and proportional fairness is used for distributing the channel resources for the mobile terminal.
4. The method of claim 3, wherein the step of determining the rate class of the mobile terminal according to the traffic rate of the mobile terminal in the current cell before sending the cell switching request comprises:
counting the average service rate of the mobile terminal in the specified time period of the current cell;
if the average service rate is less than or equal to a first rate threshold, the rate grade of the mobile terminal is a first rate grade;
if the average service rate is greater than a first rate threshold and less than or equal to a second rate threshold, the rate grade of the mobile terminal is a second rate grade;
if the average service rate is greater than a second rate threshold and less than or equal to a third rate threshold, the rate grade of the mobile terminal is a third rate grade;
and if the average service rate is greater than a third rate threshold, the rate grade of the mobile terminal is a fourth rate grade.
5. A cell switching apparatus, comprising:
a switching request receiving module, configured to receive a cell switching request sent by a source cell, where the cell switching request carries a rate level of a mobile terminal; the rate grade is a grade divided according to the rate of the mobile terminal in the source cell; the larger the rate, the higher the rate level; the smaller the rate, the lower the rate level;
a channel resource allocation module, configured to allocate channel resources to the mobile terminal according to the rate level in the cell handover request;
a switching module, configured to switch the mobile terminal from a source cell to a current cell; after the mobile terminal with the higher rate grade is switched to the current cell, more channel resources are allocated to the mobile terminal; after the mobile terminal with the lower rate grade is switched to the current cell, less channel resources are allocated to the mobile terminal;
the channel resource allocation module comprises:
a rate class reading submodule for reading a rate class from the cell switching request;
a first channel resource allocation submodule, configured to allocate channel resources to the mobile terminal by using any one of polling, maximum carrier-to-interference ratio, and proportional fairness if the rate level is a first rate level;
a second channel resource allocation submodule, configured to allocate channel resources to the mobile terminal according to a first threshold rate if the rate level is a second rate level;
a third channel resource allocation submodule, configured to allocate channel resources to the mobile terminal according to a second threshold rate if the rate level is a third rate level;
a fourth channel resource allocation submodule, configured to allocate channel resources to the mobile terminal according to the highest priority if the rate level is a fourth rate level;
the second channel resource allocation sub-module includes:
the first timing judgment unit is used for judging whether the current time exceeds the timing time corresponding to the first timer or not;
and the first timeout allocation unit is used for allocating channel resources to the mobile terminal by using any one algorithm of polling, maximum carrier-to-interference ratio and proportional fairness if the channel resources exceed the threshold.
6. The apparatus of claim 5, wherein the third channel resource allocation submodule comprises:
the second timing judgment unit is used for judging whether the current time exceeds the timing time of the second timer;
and the second timeout allocation unit is used for allocating channel resources to the mobile terminal by using any one algorithm of polling, maximum carrier-to-interference ratio and proportional fairness if the channel resources exceed the threshold.
7. A cell switching apparatus, comprising:
a rate grade determining module, configured to determine a rate grade of the mobile terminal according to a service rate of the mobile terminal in a current cell before sending the cell handover request; the rate grade is a grade divided according to the rate of the mobile terminal in the current cell; the larger the rate, the higher the rate level;
a handover request sending module, configured to send a cell handover request carrying the rate level to a target cell, so that the target cell allocates channel resources to the mobile terminal according to the rate level in the cell handover request, and further switches the mobile terminal from a current cell to the target cell; after the mobile terminal with the higher rate grade is switched to a target cell, more channel resources are allocated to the mobile terminal; after the mobile terminal with the lower rate grade is switched to a target cell, less channel resources are allocated to the mobile terminal;
wherein, the step of allocating channel resource for the mobile terminal by the target cell according to the rate grade in the cell switching request comprises:
reading the rate level from the cell switching request;
if the rate grade is a first rate grade, allocating channel resources for the mobile terminal by using any one of methods of polling, maximum carrier-to-interference ratio and proportional fairness;
if the rate grade is a second rate grade, allocating channel resources to the mobile terminal according to a first threshold rate;
if the rate grade is a third rate grade, allocating channel resources for the mobile terminal according to a second threshold rate;
if the rate grade is a fourth rate grade, allocating channel resources to the mobile terminal according to the highest priority;
the step of allocating channel resources to the mobile terminal according to the first threshold rate includes:
judging whether the current time exceeds the timing time corresponding to the first timer or not;
if the current resource exceeds the threshold value, any algorithm of polling, maximum carrier-to-interference ratio and proportional fairness is used for distributing the channel resources for the mobile terminal.
8. The apparatus of claim 7, wherein the rate level determination module comprises:
the average service rate counting submodule is used for counting the average service rate of the mobile terminal in the appointed time period of the current cell;
a first rate level determining submodule, configured to determine, if the average service rate is less than or equal to a first rate threshold, that the rate level of the mobile terminal is a first rate level;
a second rate class determining submodule, configured to determine, if the average service rate is greater than a first rate threshold and is less than or equal to a second rate threshold, that the rate class of the mobile terminal is a second rate class;
a third rate level determining submodule, configured to determine, if the average service rate is greater than the second rate threshold and is less than or equal to a third rate threshold, that the rate level of the mobile terminal is a third rate level;
and a fourth rate level determining submodule, configured to determine the rate level of the mobile terminal as a fourth rate level if the average service rate is greater than a third rate threshold.
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| CN1930903A (en) * | 2004-03-05 | 2007-03-14 | Lg电子株式会社 | Mobile broadband wireless access system for transferring service information during handover |
| CN102104969A (en) * | 2009-12-21 | 2011-06-22 | 中兴通讯股份有限公司 | Resource scheduling method and base station |
| CN105101328A (en) * | 2014-05-06 | 2015-11-25 | 中兴通讯股份有限公司 | Method and device for switching/flow migration |
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| CA2516711A1 (en) * | 2003-02-24 | 2004-09-10 | Autocell Laboratories, Inc. | System, method and apparatus for ascertaining a dynamic attribute of a system |
| CN101394359B (en) * | 2008-10-31 | 2011-07-27 | 北京邮电大学 | Communication system and method for supporting end-to-end QoS in heterogeneous wireless network |
| CN101553016B (en) * | 2009-05-14 | 2012-02-29 | 华为技术有限公司 | Method and apparatus for cell switching |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1930903A (en) * | 2004-03-05 | 2007-03-14 | Lg电子株式会社 | Mobile broadband wireless access system for transferring service information during handover |
| CN102104969A (en) * | 2009-12-21 | 2011-06-22 | 中兴通讯股份有限公司 | Resource scheduling method and base station |
| CN105101328A (en) * | 2014-05-06 | 2015-11-25 | 中兴通讯股份有限公司 | Method and device for switching/flow migration |
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