CN105992276A

CN105992276A - Service distribution method and device in multi-standard network

Info

Publication number: CN105992276A
Application number: CN201510041323.XA
Authority: CN
Inventors: 刘阳
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2015-01-27
Filing date: 2015-01-27
Publication date: 2016-10-05
Anticipated expiration: 2035-01-27
Also published as: CN105992276B

Abstract

The invention discloses a service distribution method and a device in a multi-standard network, wherein the utilization rate of network resources is improved. According to the method, after a CRRM receiving terminal sends out a service connection setup request, the CRRM receiving terminal judges whether a current RAT can bear the base sub-stream and the enhanced sub-stream of a corresponding service or not. On the condition that the CRRM receiving terminal judges that the current RAT can bear the base sub-stream and the enhanced sub-stream of the corresponding service, the current RAT is adopted to bear the base sub-stream and the enhanced sub-stream of the corresponding service. Otherwise, the CRRM receiving terminal further judges whether the current RAT can bear the base sub-stream of the corresponding service or not. On the condition that the CRRM receiving terminal judges that the current RAT can bear the base sub-stream of the corresponding service, the current RAT is adopted to bear the base sub-stream of the corresponding service. Meanwhile, another RAT that meets a first preset condition is adopted to bear the enhanced sub-stream of the corresponding service. Otherwise, another RAT that meets a second preset condition is adopted to bear the base sub-stream and the enhanced sub-stream of the corresponding service. In this way, the service distribution can be passively scheduled, and the terminal implementation complexity is lowered. Moreover, RAT resources can be fully and reasonably utilized. The data transmission efficiency and the overall performance of the system are improved.

Description

Service distribution method and device under multi-standard network

Technical Field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for service offloading in a multi-system network.

Background

With the development and evolution of mobile communication networks, more and more operators have multiple networks of different systems (may be referred to as multi-system networks for short) at the same time, and as shown in fig. 1, adopt the concept of Common Radio Resource Management (CRRM) to perform unified centralized Management on multiple Radio Access Technologies (RATs) by introducing a centralized control node, where a CRRM entity (may be a CRRM server, hereinafter referred to as CRRM for short) may centrally manage N RATs, and the Management mechanism is: the CRRM may issue commands (e.g., resource allocation suggestions, etc.) to its governed RAT; each RAT may report the relevant conditions (e.g., load conditions, etc.) of its system network to its belonging CRRM. In this way, the CRRM can obtain the network related situation of each RAT, and the CRRM manages each RAT uniformly, where the selected service scheduling method is optimal.

At present, more and more terminals have multi-mode capability, that is, a terminal can simultaneously support multiple different modes (hereinafter, such a terminal is referred to as a multi-mode terminal for short), and if the multi-mode terminal supports simultaneous connection to multiple different modes (hereinafter, such a terminal is referred to as a multi-mode multi-connection terminal for short), a CRRM can distribute (distribute also as scheduling) the same service or different services of the terminal to network bearers of different modes, thereby improving the service performance of the system.

In the prior art, a cross-RAT scheduling method also exists. A service is divided into a basic part, which is considered to be the part necessary for rendering the service, and an enhanced part, which is considered to be the part that may further enhance the experience of the service. The existing splitting strategy splits a service into a basic sub-stream of the service and an enhanced sub-stream of the service according to a basic part and an enhanced part of the service, and for some typical services, an exemplary splitting method of the basic sub-stream of the service and the enhanced sub-stream of the service is shown in table 1 below:

TABLE 1

	Basic sub-stream of traffic	Enhanced streaming of business
			Http	Primary object service sub-stream	Embedded object service sub-stream
Video	Elementary video substream	Enhancing video sub-streams
			Ftp	Sub-streams meeting minimum rate requirements	Sub-streams beyond the minimum rate required portion

Based on this, the existing offloading policy is to use a standard network with a large coverage (such as UMTS) for the basic sub-stream of the service to ensure that the probability of obtaining the basic service experience of the user is relatively high, and use a high-rate standard network (such as WLAN) for the enhanced sub-stream of the service, so that even if the high-rate standard network is not reachable by the user (for example, WLAN is usually covered by a hot spot, but is not covered continuously), the user only loses the enhanced part of the service, and the basic service experience is still ensured to be obtained.

However, when the existing offloading policy performs cross-RAT offloading scheduling, different parts of a service are directly divided into different service sub-flows, and the different systems of networks are used for carrying, and if a system network with large coverage can also meet the enhanced part of the service, that is, not only can the basic sub-flows of the service be carried, but also the enhanced sub-flows of the service can be carried.

Disclosure of Invention

The embodiment of the invention provides a service distribution method and device under a multi-system network, which are used for solving the problem of complexity of terminal and network implementation in the prior art and improving the utilization rate of network resources.

The embodiment of the invention provides the following specific technical scheme:

a service distribution method under a multi-standard network comprises the following steps:

after receiving a service connection establishment request sent by a terminal, a CRRM judges whether a current RAT can bear a basic sub-flow and an enhanced sub-flow of a corresponding service, wherein the basic sub-flow is used for indicating service distribution meeting the minimum service quality of the corresponding service, and the enhanced sub-flow is used for indicating service distribution enhancing the service quality;

if yes, adopting the current RAT to bear the basic sub-flow and the enhanced sub-flow of the corresponding service;

if not, further judging whether the current RAT can bear the basic sub-flow of the corresponding service, if so, adopting the current RAT to bear the basic sub-flow of the corresponding service, and selecting other RATs meeting a first preset condition to bear the enhanced sub-flow of the corresponding service; otherwise, selecting other RATs meeting a second preset condition to carry the basic sub-flow and the enhanced sub-flow of the corresponding service.

Therefore, service shunting scheduling can be passively carried out, the complexity of terminal realization is reduced, RAT resources can be fully and reasonably utilized, and the data transmission efficiency and the overall performance of the system are improved.

Preferably, the determining whether the current RAT can carry the basic sub-stream and the enhanced sub-stream of the corresponding service includes:

estimating a first load value corresponding to the basic sub-flow of the corresponding service under the current RAT, estimating a second load value corresponding to the enhanced sub-flow of the corresponding service under the current RAT, and comparing a first estimated total load value of the current RAT with a preset system load threshold value of the current RAT, wherein the first estimated total load value is the sum of the first load value, the second load value and the current system load value of the current RAT, and the system load threshold value is used for representing the maximum value of the load which can be carried by the current RAT;

if the first estimated total load value is smaller than the system load threshold value of the current RAT, determining that the current RAT can bear the basic sub-flow and the enhanced sub-flow of the corresponding service;

and if the first estimated total load value is not smaller than the system load threshold value of the current RAT, judging that the current RAT can not bear the basic sub-flow and the enhanced sub-flow of the corresponding service.

In this way, all RAT resources can be fully utilized, and the optimal RAT is selected to schedule the enhanced subflow of the service.

Preferably, when it is determined that the current RAT cannot carry the basic sub-stream and the enhanced sub-stream of the corresponding service, further determining whether the current RAT can carry the basic sub-stream of the corresponding service includes:

comparing a second estimated total load value of the current RAT with a preset system load threshold value of the current RAT, wherein the second estimated total load value is the sum of the first load value and the current system load value of the current RAT;

if the second estimated total load value is smaller than a preset system load threshold value of the current RAT, judging that the current RAT can bear the basic sub-flow of the corresponding service;

and if the second estimated total load value is not smaller than the preset system load threshold value of the current RAT, judging that the current RAT can not bear the basic sub-flow of the corresponding service.

Preferably, the selecting another RAT meeting the first preset condition to carry the enhanced superflows of the corresponding services specifically includes:

selecting all other RATs meeting the terminal access condition, and generating a first RAT set, wherein the access condition is as follows: the measured value of the pilot signal of the terminal reaches a preset threshold of the RAT where the terminal is located, and the current system load value of the RAT where the terminal is located is smaller than the preset system load threshold value of the RAT where the terminal is located;

performing the following for each RAT included in the first set of RATs, respectively: estimating a third load value corresponding to the enhanced sub-flow of the corresponding service under one RAT, and calculating a difference value between a preset system load threshold value of the one RAT and a third estimated total load value of the one RAT, wherein the third estimated total load value is the sum of the third load value and the current system load value of the one RAT;

and generating a first difference set based on the difference calculated for each RAT contained in the first RAT set, and selecting the RAT corresponding to the maximum value in the first difference set to bear the enhanced sub-stream of the corresponding service.

Preferably, selecting another RAT meeting the second preset condition to carry the basic sub-stream and the enhanced sub-stream of the corresponding service includes:

selecting all other RATs meeting the terminal access condition, and generating a second RAT set, wherein the access condition is as follows: the measured value of the pilot signal of the terminal reaches a preset threshold of the RAT where the terminal is located, and the current system load value of the RAT where the terminal is located is smaller than the preset system load threshold value of the RAT where the terminal is located;

performing the following for each RAT included in the second set of RATs, respectively: estimating a fourth load value corresponding to the basic sub-flow of the corresponding service under one RAT, estimating a fifth load value corresponding to the enhanced sub-flow of the corresponding service under the one RAT, and calculating a difference value between a preset system load threshold value of the one RAT and a fourth estimated total load value of the one RAT, wherein the fourth estimated total load value is the sum of the third load value, the fourth load value and the current system load value of the one RAT;

and generating a second difference set based on the difference values obtained by calculation aiming at each RAT contained in the second RAT set, selecting the difference values larger than zero in the second difference set to generate a first difference subset, and selecting the RAT corresponding to the maximum value in the first difference subset to bear the basic sub-flow and the enhanced sub-flow of the corresponding service.

Preferably, if the first subset of difference values is empty, the method further comprises:

selecting all other RATs meeting the terminal access condition, and generating a third RAT set;

performing the following for each RAT included in the third set of RATs, respectively: estimating a sixth load value corresponding to the basic sub-flow of the corresponding service under one RAT, and calculating a difference value between a preset system load threshold value of the one RAT and a fifth estimated total load value of the one RAT, wherein the fifth estimated total load value is the sum of the sixth load value and the current system load value of the one RAT;

and generating a third difference set based on the difference values obtained by calculation for each RAT contained in the third RAT set, selecting the difference value larger than zero in the third difference set to generate a second difference subset, and selecting the RAT corresponding to the maximum value in the second difference subset to bear the basic sub-flow of the corresponding service.

Preferably, after the current RAT is adopted to carry the basic sub-flow of the corresponding service, and another RAT meeting the first preset condition is selected to carry the enhanced sub-flow of the corresponding service, the method further includes:

recording a first recommended scheduling time tag in basic sub-flow data, the first recommended scheduling time tag being used for indicating a time when a current RAT is recommended to schedule a basic sub-flow of the corresponding service, and recording a second recommended scheduling time tag in enhanced sub-flow data, the second recommended scheduling time tag being used for indicating a time when other RATs meeting a first preset condition are recommended to schedule an enhanced sub-flow of the corresponding service, wherein a difference value between the first recommended scheduling time and the second recommended scheduling time does not exceed a preset time difference threshold value.

In this way, it can be ensured that the receiving side (terminal or CRRM entity) can effectively combine the service data sub-streams from different RATs, thereby avoiding the problem of excessive delay difference.

A service distribution device under a multi-standard network comprises:

a communication unit, configured to receive a service connection establishment request sent by a terminal;

a determining unit, configured to determine whether a current RAT can carry a basic sub-flow and an enhanced sub-flow of a corresponding service, where the basic sub-flow is used to indicate a service split that meets a minimum service quality of the corresponding service, and the enhanced sub-flow is used to indicate a service split that enhances the service quality;

Preferably, when determining whether the current RAT can carry the basic sub-stream and the enhanced sub-stream of the corresponding service, the determining unit is specifically configured to:

Preferably, when it is determined that the current RAT cannot carry the basic sub-stream and the enhanced sub-stream of the corresponding service, the determining unit further determines whether the current RAT can carry the basic sub-stream of the corresponding service, which specifically includes:

Preferably, when selecting another RAT meeting the first preset condition to carry the enhanced sub-stream of the corresponding service, the determining unit is specifically configured to:

Preferably, when selecting another RAT meeting the second preset condition to carry the basic sub-stream and the enhanced sub-stream of the corresponding service, the determining unit is specifically configured to:

Preferably, if the first subset of difference values is empty, the determining unit is further configured to:

a merging unit, configured to record a first recommended scheduling time tag in the basic sub-flow data, where the first recommended scheduling time tag is used to indicate a time when a current RAT is recommended to schedule a basic sub-flow of the corresponding service, and record a second recommended scheduling time tag in enhanced sub-flow data, where the second recommended scheduling time tag is used to indicate a time when other RATs meeting a first preset condition are recommended to schedule an enhanced sub-flow of the corresponding service, and a difference between the first recommended scheduling time and the second recommended scheduling time does not exceed a preset time difference threshold.

Drawings

FIG. 1 is a diagram of a CRRM managed RAT architecture in the prior art;

fig. 2 is a flowchart of uplink service interaction in the embodiment of the present invention;

fig. 3 is a flow chart of downlink service interaction in the embodiment of the present invention;

fig. 4 is a flow chart of traffic offload in the embodiment of the present invention;

fig. 5 and 6 are schematic diagrams of CRRM structures in an embodiment of the present invention.

Detailed Description

The embodiment of the invention designs a service shunting method and a device under a multi-system network, judges whether the service should be shunted or not by estimating the load values of the basic sub-flow and the enhanced sub-flow of the service under the RAT and combining the network conditions of all the RATs, and selects the optimal RAT for the basic sub-flow and the enhanced sub-flow of the service to bear under the shunting condition, thus the problem caused by asynchronous service data sub-flow received by a receiving side due to service shunting can be reduced, in addition, the RAT resources can be fully and reasonably utilized, and the data transmission efficiency and the overall performance of a system are improved.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The embodiment of the invention adopts CRRM to carry out unified centralized management on a plurality of RATs aiming at the service of a multimode multi-connection terminal under a multi-system network, wherein, each RAT is provided with at least one cell.

Referring to fig. 2, in the embodiment of the present invention, for an uplink service, an overall interaction flow of a network element is as follows:

step 201: the terminal sends a service connection establishment request to the core network.

Step 202: after receiving the service connection establishment request sent by the terminal, the core network sends a service bearer connection establishment request to the CRRM.

Step 203: after receiving a service bearer connection establishment request sent by a core network, the CRRM determines whether offloading is needed for the service, and if so, offloads to which RATs to schedule.

Specifically, since the CRRM performs centralized management on the RATs, the CRRM can obtain the relevant conditions of each RAT network through the information reported by each RAT, and according to the relevant conditions of each RAT network, the CRRM determines whether offloading is needed for the service, and specifically offloads the service to which RATs if offloading is needed. The specific service offloading method will be described in detail in the following process.

Step 204: the CRRM sends a radio bearer setup request to the terminal, and sends the offloading decision result obtained in step 203 to the terminal to indicate whether the terminal needs to activate another RAT.

Step 205: and the terminal feeds back a radio bearer establishment response to the CRRM.

Step 206: and the CRRM sends the received radio bearer establishment response fed back by the terminal to the core network.

So far, after the network route of the service is established, the terminal can perform signaling interaction of an application layer with the service server (i.e., the service source).

Step 207: and the service source sends the service data stream to the CRRM.

Step 208: after receiving the service data stream, the CRRM performs different operations according to whether the service data stream needs to be distributed.

If the shunting is not needed, directly sending the received service data flow to the terminal;

if the splitting is needed, the received service data stream is split to different RATs, and the corresponding RATs are instructed to respectively send the corresponding service data sub-streams to the terminal, wherein one RAT corresponds to one service data sub-stream. After the traffic data sub-stream is transmitted, step 209 is performed.

Step 209: and the terminal combines the received service data sub-streams sent by the plurality of RATs.

The specific combining method will be described in detail in the following process.

Step 201-step 209 are directed to the network element interaction flow in the uplink direction, and the network element interaction flow in the downlink direction in the embodiment of the present invention is described below.

Referring to fig. 3, in the embodiment of the present invention, for the downlink direction, the overall interaction flow of the network element is as follows:

steps 301 to 306 are the same as steps 201 to 206, that is, the network route establishment procedure of the service is the same, and will not be described herein again.

After the terminal can perform signaling interaction with the service server at the application layer, the terminal can know whether the service needs to be distributed according to the instruction of the CRRM, and respectively perform different operations according to whether the service needs to be distributed.

If the shunting is not needed, the terminal directly sends the service data stream to the CRRM, and the CRRM sends the service data stream to the service server; if shunting is needed, go to step 307.

Step 307: and after the terminal performs service distribution, the service data sub-streams are respectively sent to the RATs distributed by the CRRM.

Step 308: the CRRM combines traffic data sub-streams from different RATs.

Step 309: and sending the combined service data stream to the service server.

Wherein, the terminal can obtain: when traffic is shunted, which RATs carry the traffic data sub-streams of the traffic. In addition, the specific combining method of the CRRM for the traffic data sub-streams from different RATs will be described in detail in the following process.

So far, the introduction of the network element interaction flow in the uplink direction and the downlink direction is finished. The following describes in detail a traffic offload policy in the embodiment of the present invention.

Referring to fig. 4, in the embodiment of the present invention, a service offloading process of a multi-system network is as follows:

step 400: after receiving a service connection establishment request sent by a terminal, the CRRM determines whether the current RAT can carry a basic sub-stream and an enhanced sub-stream of a corresponding service, if so, performs step 410, otherwise, performs step 420.

For a service, the basic sub-stream is used to indicate the service split meeting the minimum requirement of the service, and the enhanced sub-stream is used to indicate the service split enhancing the service experience. The basic sub-stream and the enhanced sub-stream of the service are divided by the service source, and there are various dividing methods, and one of them is described as an example below.

For example, for scalable video coding (e.g., h.264 or MPEG-4), the base sub-stream may correspond to a normal definition video stream, and the service data stream after the base sub-stream and the enhancement sub-stream are combined may correspond to a high definition video stream; for the Ftp traffic, since the entire traffic has the same Quality of Service (QoS) requirement, the division of the Ftp traffic cannot be standardized by Quality, taking the Ftp download traffic as an example, the basic sub-flow may correspond to the traffic split required by the lowest download rate (for example, the lowest rate requirement is 64kbps), and the enhanced sub-flow may correspond to the traffic split required by the download rate exceeding the lowest download rate.

In the embodiment of the invention, the service distribution method under the multi-system network is suitable for any dividing method of the basic sub-flow and the enhanced sub-flow, namely no matter which dividing method is adopted, the CRRM analyzes the received service data flow, can distinguish the basic sub-flow and the enhanced sub-flow, and can predict the basic sub-flow, the enhanced sub-flow and the load of the basic sub-flow and the enhanced sub-flow in the RAT

For example, a terminal requests ftp traffic with a rate requirement of 2Mbps, and assuming a base substream rate requirement of 500kbps, the enhancer stream rate requirement is 1500 kpbs. Therefore, the CRRM can estimate the load that the RAT needs to occupy to carry the basic sub-stream of 64kbps according to the rate requirement of the basic sub-stream of 64kbps in combination with the current carrying capacity of a certain RAT, and also estimate the load that the RAT needs to occupy to carry the enhanced sub-stream of a certain rate requirement.

Specifically, after receiving a service connection establishment request sent by a terminal, a CRRM respectively estimates loads corresponding to a basic sub-stream and an enhanced sub-stream of the service in an RAT where the terminal is located, and determines whether the RAT where the terminal is located can carry the basic sub-stream and the enhanced sub-stream of the service according to a load condition reported by the RAT where the terminal is located. The specific method for judging is as follows:

estimating the corresponding load value (which can be recorded as a first load value) of the basic sub-flow of the service under the current RAT, estimating the corresponding load value (which can be recorded as a second load value) of the enhanced sub-flow of the service under the current RAT, estimating that the basic sub-flow and the enhanced sub-flow of the service are both accessed to the current RAT, the total system load of the current RAT (which may be referred to as a first estimated total load value) is determined, and the first estimated total load value of the current RAT is compared with a preset system load threshold value of the current RAT, wherein the first estimated total load value is the sum of the first load value, the second load value and the current system load value of the current RAT, the system load threshold value is used for representing the maximum value of the load which can be carried by the current RAT, the system load threshold is pre-configured by the system, and whether the current RAT can bear the basic sub-flow and the enhanced sub-flow of the service is judged according to the obtained comparison result.

If the first estimated total load value is smaller than the system load threshold of the current RAT, it indicates that the basic sub-stream and the enhanced sub-stream of the service will not exceed the upper limit of the system load of the current RAT even though the basic sub-stream and the enhanced sub-stream of the service are carried by the current RAT, and then it is determined that the current RAT can carry the basic sub-stream and the enhanced sub-stream of the service, and step 410 may be executed.

If the first estimated total load value is not less than the system load threshold value of the current RAT, which indicates that if the basic sub-stream and the enhanced sub-stream of the service are carried by the current RAT, the load of the current RAT system may overflow, and it is determined that the current RAT cannot carry the basic sub-stream and the enhanced sub-stream of the corresponding service, step 420 may be executed.

Step 410: and adopting the current RAT to carry the basic sub-flow and the enhanced sub-flow of the corresponding service.

When the condition that the current RAT can bear the basic sub-flow and the enhanced sub-flow of the service is judged, the service is not shunted, the current RAT bears the basic sub-flow and the enhanced sub-flow of the service, once the service is shunted to different RATs for bearing, a plurality of service data sub-flows are combined by a terminal, so the service is not shunted, the realization complexity of the terminal can be reduced, and on the other hand, when the service is shunted to different RAT bearings, the service data sub-flows from different RATs are received by a receiving terminal with larger delay difference, so the service is not shunted, and the service quality reduction caused by the delay difference of the service data sub-flows received by the receiving terminal can be reduced.

Step 420: further judging whether the current RAT can bear the basic sub-flow of the corresponding service, if so, adopting the current RAT to bear the basic sub-flow of the corresponding service, and selecting other RATs meeting a first preset condition to bear the enhanced sub-flow of the corresponding service; otherwise, selecting the basic sub-flow and the enhanced sub-flow of the other RAT meeting the second preset condition to carry the corresponding service.

Under the condition that the current RAT is judged not to be capable of simultaneously bearing the basic sub-flow and the enhanced sub-flow of the service, whether the current RAT can bear the basic sub-flow of the service is further judged, and the specific judgment method comprises the following steps:

based on the first load value corresponding to the basic sub-flow of the service under the current RAT estimated in step 400 and the current system load of the current RAT obtained according to the network condition reported by the current RAT, after the basic sub-flow of the service is estimated to be accessed to the current RAT, the total system load value of the current RAT (which may be denoted as a second estimated total load value) is estimated, the second estimated total load value is the sum of the first load value and the current system load value of the current RAT, the second estimated total load value of the current RAT is compared with the preset system load threshold value of the current RAT, and whether the basic sub-flow of the service can be carried by the current RAT is judged according to the obtained comparison result, which is described in the following two cases:

in the first case: if the second estimated total load value is smaller than the preset system load threshold value of the current RAT, the basic sub-flow of the service is accessed on the basis of the current system load of the current RAT, and the basic sub-flow of the service can not exceed the upper limit of the current RAT system load, under the condition, the current RAT is judged to be capable of bearing the basic sub-flow of the service.

Therefore, the basic QoS requirement of the service can be ensured, and further, other qualified RAT bearers under the CRRM are continuously searched for the enhanced workflow of the service, and the specific process is as follows:

1. selecting all other RATs which accord with the access condition of the terminal, and generating a first RAT set, wherein the access condition is as follows: the measured value of the pilot signal of the terminal reaches the preset threshold of the RAT where the terminal is located, and the current system load value of the RAT where the terminal is located is smaller than the preset system load threshold of the RAT where the terminal is located.

Specifically, a set (denoted as a first RAT set) is generated for finding all other RATs meeting the access condition for the terminal, where the other RATs must satisfy the following conditions at the same time:

(1) for example, for a Long Term Evolution (LTE) network of a third generation mobile communication system, a condition may be set that a Reference Signal Received Power (CRS RSRP) of a cell Reference Signal measured by the terminal is greater than a preset threshold (for example, the preset threshold is set to-85 dbm); for a time Division-Synchronous Code Division Multiple Access (TDS-CDMA) system network, a condition may be set that a Received Signal Code Power (PCCPCH RSCP) of a main common Control Physical Channel measured by a terminal is greater than a preset threshold (e.g., the preset threshold is set to-85 dbm). The setting is to ensure that the terminal can normally interact data with the RAT under the coverage of the RAT.

(2) The current system load under the RAT is less than the RAT configured upper limit of system load because if the current system load under the RAT has reached the configured upper limit of system load, the RAT must not be able to continue carrying any traffic flows.

2. Respectively executing the following operations for each RAT contained in the first RAT set generated in the step 1:

estimating a load value (marked as a third load value) corresponding to the service enhancer stream under any one RAT contained in the first RAT set, estimating a total load value (marked as a third estimated total load value) of the corresponding RAT after the corresponding RAT is accessed into the service enhancer stream on the basis of the current system load, and then calculating a difference value between a preset system load threshold value of the corresponding RAT and a third estimated total load value of the corresponding RAT, wherein the third estimated total load value is the sum of the third load value and the current system load value of the corresponding RAT;

the difference calculation is performed for each RAT in the first RAT set, a plurality of differences can be obtained, then, based on the differences calculated for each RAT included in the first RAT set, a difference set (denoted as a first difference set) is generated, and the RAT corresponding to the maximum value in the first difference set is selected to carry the enhanced superflow of the service.

If one difference value in the first difference value set is greater than zero, it indicates that the RAT corresponding to the difference value can completely meet the access of the enhanced sub-stream of the service;

if a certain difference in the first difference set is smaller than zero, it indicates that the RAT corresponding to the difference cannot completely satisfy the access of the enhanced sub-stream of the service, that is, may satisfy the access of a part of the enhanced sub-stream of the service, or may not allow the access of the enhanced sub-stream of the service. Thus, the differences in the first set of differences need not satisfy a condition greater than zero.

Selecting a maximum value in the first difference set (the maximum value may be the maximum value in the difference values greater than zero if there is a difference value greater than zero in the first difference set, or may be the maximum value in the difference values less than zero if there is no difference value greater than zero in the first difference set), and finding the RAT corresponding to the selected maximum value in the first RAT set to carry the enhanced superflows of the service, so that all RAT resources can be fully utilized to select the optimal RAT to schedule the enhanced superflows of the service.

If the first RAT set is empty, it indicates that there is no other RAT meeting the access condition to carry the enhanced subflow of the service, in this case, the enhanced subflow of the service is not sent;

in the second case: if the second estimated total load value is not less than the preset system load threshold value of the current RAT, it indicates that the basic sub-flow of the service is accessed again on the basis of the current system load of the current RAT, which may cause the overflow of the system load of the current RAT, and under such a condition, it is determined that the current RAT cannot bear the basic sub-flow of the service.

Further, the CRRM finds whether there is a basic sub-stream and an enhanced sub-stream that can carry the service by another RAT, and the specific process is as follows:

A. and selecting all other RATs meeting the access condition of the terminal, and generating a set (marked as a second RAT set), wherein the access condition is the same as the access condition mentioned in the step 1 in the first case, namely the pilot signal measurement value of the terminal reaches the preset threshold of the RAT where the terminal is located, and the current system load value of the RAT where the terminal is located is smaller than the preset system load threshold value of the RAT.

B. Performing the following for each RAT included in the second set of RATs, respectively:

estimating a load value (denoted as a fourth load value) corresponding to the basic sub-flow of the service under any one RAT in the second RAT set, estimating a load value (denoted as a fifth load value) corresponding to the enhanced sub-flow of the service under the corresponding RAT, estimating a total load value (denoted as a fourth estimated total load value) after the corresponding RAT is accessed to the basic sub-flow and the enhanced sub-flow of the service on the basis of the current system load, and calculating a difference value between a preset system load threshold value of the corresponding RAT and the fourth estimated total load value of the corresponding RAT, wherein the fourth estimated total load value is the sum of the third load value, the fourth load value and the current system load value of the corresponding RAT;

the difference calculation is performed for each RAT in the second RAT set, so that a plurality of differences can be obtained, then, based on the differences calculated for each RAT included in the second RAT set, a difference set (denoted as a second difference set) is generated, differences larger than zero are selected from the second difference set to generate a first difference subset, and a RAT corresponding to the maximum value in the first difference subset is selected to carry the basic sub-flow and the enhanced sub-flow of the service.

If one difference value in the second difference value set is greater than zero, it indicates that the RAT corresponding to the difference value can completely meet the simultaneous access of the basic sub-stream and the enhanced sub-stream of the service;

if a certain difference in the second difference set is not greater than zero, it indicates that the RAT corresponding to the difference cannot completely satisfy simultaneous access of the basic sub-stream and the enhanced sub-stream of the service, and may only satisfy the basic sub-stream of the service and cannot satisfy the enhanced sub-stream of the service; it is also possible that neither the enhanced nor the basic substream of the service can be satisfied. In this case, the difference value not greater than zero is discarded.

The generated RATs corresponding to all the differences in the first difference subset can simultaneously carry the basic sub-stream and the enhanced sub-stream of the service, a maximum difference is selected from the first difference subset, and the RAT corresponding to the selected maximum difference is found in the second RAT set to carry the basic sub-stream and the enhanced sub-stream of the service, so that all RAT resources can be fully utilized, and the optimal RAT can be selected to schedule the basic sub-stream and the enhanced sub-stream of the service.

In addition, if the second RAT set is empty, it indicates that there is no other RAT meeting the access condition to simultaneously carry the basic sub-stream and the enhanced sub-stream of the service; alternatively, if the second set of RATs is not empty, but the first subset of differences is empty, indicating that all differences in the second set of differences are not greater than zero. In both cases, no one RAT in the second set of RATs is selected to carry the traffic flow and the next selection is continued.

The CRRM selects an optimal RAT from other RATs capable of carrying the basic subflow of the service, and the specific process is as follows:

a. selecting all other RATs meeting the access condition of the terminal, and generating a set (denoted as a third RAT set), where the access condition is the same as the access condition mentioned in step 1 in the first case, and is not described herein again.

b. Performing the following for each RAT included in the third set of RATs, respectively:

estimating a load value (marked as a sixth load value) corresponding to the basic sub-flow of the service under any one RAT in the third RAT set, estimating a total load value (marked as a fifth estimated total load value) of the corresponding RAT after the basic sub-flow of the service is accessed on the basis of the current system load, and calculating a difference value between a preset system load threshold value of the corresponding RAT and a fifth estimated total load value of the corresponding RAT, wherein the fifth estimated total load value is the sum of the sixth load value and the current system load value of the corresponding RAT;

the difference calculation is performed for each RAT in the third RAT set, so that a plurality of differences can be obtained, then, based on the differences calculated for each RAT included in the third RAT set, a difference set (denoted as a third difference set) is generated, a difference greater than zero is selected from the third difference set to generate a second difference subset, and the RAT corresponding to the maximum value in the second difference subset is selected to carry the basic sub-stream of the service.

If a certain difference in the third difference set is greater than zero, it indicates that the RAT corresponding to the difference can completely satisfy the access of the basic sub-stream of the service;

if a difference value in the second difference value set is not greater than zero, it indicates that the RAT corresponding to the difference value will overflow the system load when accessing the basic sub-flow of the service.

Since the basic sub-flow is a basic requirement of the service, it is necessary to ensure that the RAT can completely carry the basic sub-flow of the service, so as to further ensure the normal service quality of the service. And if the difference is not greater than zero, the RAT corresponding to the difference cannot be used for bearing the basic sub-flow of the service, and here, the difference greater than zero is selected from the second difference set to generate a second difference subset.

Then, the largest difference value is selected from the second subset of difference values, and further the RAT corresponding to the largest difference value is selected from the third RAT set to carry the basic sub-flow of the service.

So far, an optimal RAT has been selected from other RATs to carry the basic sub-stream of the service, and for the enhanced sub-stream of the service, no RAT may be selected to carry the sub-stream, or other RATs may be continuously selected to carry the sub-stream, and the selection method is as described in step 1 and step 2 in the above first case, and is not described herein again.

In addition, if the third RAT set is empty, or if the third RAT set is not empty but the second difference subset is empty, it indicates that there is no suitable RAT to carry the basic sub-flow of the service, in this case, the connection establishment request of the service is rejected.

To this end, the service offloading method in the multi-system network has been introduced, and further, in the case of offloading the service, the terminal (for the downlink direction) and the CRRM (for the uplink direction) need to combine service data sub-streams from different RATs.

In the prior art, when a service initiated by a terminal is distributed to different RATs for carrying, delay differences may exist at the time when service data sub-streams from different RATs reach the terminal or reach a CRRM, and if the delay differences are too large, a receiving side cannot realize effective combination of the different service data sub-streams, so that service performance of system data transmission is reduced.

In view of this, an embodiment of the present invention designs a method for merging service data sub-streams, which specifically includes:

a first proposed scheduling time stamp is printed in the base sub-stream data and a second proposed scheduling time stamp is printed in the enhancement sub-stream data, each indicating a time at which the respective RAT schedules the respective traffic data sub-stream.

For example, for the downlink direction, the receiving side is a terminal, for the uplink direction, the receiving side is a CRRM entity, wherein, in the process of transmitting service data stream, the CRRM determines to use RAT1 to carry basic sub-stream of corresponding service, and RAT2 to carry enhanced sub-stream of corresponding service, after receiving service data stream, a time-stamp of the first proposed schedule (denoted time stamp1) is printed in the basic sub-stream of the service, a time-stamp of the second proposed schedule (denoted time stamp2) is printed in the enhanced sub-stream of the service, and, the guaranteed time _ stamp1 is approximately equal to time _ stamp2, and thus, when the RAT1 schedules the basic sub-stream data to the terminal, according to the scheduling proposed by CRRM, the RAT1 ensures that the basic sub-stream data is scheduled before time _ stamp1, when RAT2 schedules the enhanced streaming data to the terminal, RAT2 will ensure that the enhanced streaming data is scheduled to completion before time _ stamp2, according to the scheduling suggested by CRRM. In this way, it is possible to ensure that the basic sub-stream and the enhanced sub-stream of the service can reach the receiving side as simultaneously as possible, so that it is only ensured that the receiving side (terminal or CRRM entity) can effectively combine the service data sub-streams from different RATs, and the problem of excessive delay difference is avoided.

In addition, based on the above embodiment, after determining the result of splitting the corresponding service, the corresponding RAT is selected to carry the basic sub-stream and the enhanced sub-stream of the corresponding service according to the above method, and after the service is accessed, in the process of continuing the service, the result of splitting the service is adjusted by using a preset policy. Specifically, but not limited to, the following two strategies may be adopted:

the first strategy is: after determining the offloading result of the service, the RAT selected by the CRRM is used to carry the basic sub-stream and the enhanced sub-stream of the service, and during the duration of the service, the offloading result is not actively adjusted by using the service offloading method in the embodiment of the present invention, that is, the RAT carrying the basic sub-stream and the enhanced sub-stream of the service is not changed, but when the CRRM adjusts the RAT under its jurisdiction in other aspects, the adjustment of the service offloading result caused by the change of the RAT is allowed.

For example, when the CRRM supervises the RATs, the CRRM performs real-time regulation and control on the RATs by using a load balancing algorithm, a load congestion control algorithm, and the like, and in the regulation and control process, if the load of the basic sub-stream carrying the service corresponding to the terminal or/and the RAT enhancing the sub-stream is too much compared with that of other RATs, so that the load between the RATs is unbalanced, the CRRM can perform balanced regulation on the load of the RAT under the control of the CRRM, so that the RATs carrying the basic sub-stream or/and the RAT enhancing the sub-stream of the service corresponding to the terminal are changed; if the load of the RAT carrying the basic sub-flow or/and the enhanced sub-flow of the service corresponding to the terminal is too heavy, and the system load threshold configured by the RAT is about to be reached or exceeded, the CRRM may adjust the RAT carrying the heavy load, and allocate a part of the service carried by the CRRM to other RAT bearers, so that the RAT carrying the basic sub-flow or/and the enhanced sub-flow of the service corresponding to the terminal is changed.

The second strategy is: the CRRM actively adjusts the service offloading result, specifically, a periodic manner or an event-triggered manner is adopted for adjustment.

The adjustment in a periodic manner means that a period is set, when the period arrives, detection of all RATs including the RAT carrying the service corresponding to the terminal is triggered, and when it is determined that a manner better than the current offloading result exists, the current offloading result is adjusted.

For example, when a service corresponding to the terminal is established, the service is shunted to different RAT bearers according to the result of the service shunting method, and in the process of service continuity, if there is another service end or a user leaves in the RAT carrying the service basic sub-stream, the idle resource of the RAT can carry the enhanced sub-stream of the service, and in this case, the enhanced sub-stream of the service can be adjusted to the RAT carrying the basic sub-stream of the service, that is, the service is not shunted, and the RAT is adopted to carry the basic sub-stream and the enhanced sub-stream of the service at the same time, so that the problem that the receiving side receives the service data sub-stream asynchronously due to shunting is avoided.

For another example, when a service corresponding to the terminal is established, the service is distributed to different RATs to be loaded according to the result of the service distribution method, where a basic sub-flow of the service is distributed to a RAT with a weak QoS guarantee level (e.g., WLAN), and in the process of service continuity, if there is another service ending or user leaving in another RAT with a strong QoS guarantee level (e.g., cellular network such as LTE), the idle resource of the RAT may carry the basic sub-flow of the service.

The adjustment in an event triggering manner means that when the RAT carrying the basic sub-stream of the service corresponding to the terminal can simultaneously carry the enhanced sub-stream of the service due to the reasons of the end of other services or the leaving of the user, the adjustment of the RAT carrying the enhanced sub-stream of the service is triggered, and the RAT carrying the basic sub-stream of the service is adopted to simultaneously carry the enhanced sub-stream of the service; or, when the RAT with stronger QoS guarantee strength ends in other services or the user leaves, triggering the adjustment of the RAT for the basic sub-flow carried under the RAT with weaker QoS guarantee strength, and adjusting the basic sub-flow carried under the RAT with weaker QoS guarantee strength to the RAT with stronger QoS guarantee strength to carry under the RAT, so as to ensure the basic service quality of the service.

Based on the above embodiments, the overall flow of the specific implementation of the above scheme is further described in detail below.

Supposing that the CRRM receives a connection establishment request of a service (denoted as k) sent by the terminal, the current system load of the RAT (denoted as rai) where the terminal is located is lc (i), the preset system load threshold value of the rai is Th1(i), the CRRM estimates the load value corresponding to the basic sub-flow of the service under the rai to be lb (i), and the CRRM estimates the load value corresponding to the enhanced sub-flow of the service under the rai to be le (i).

The connection establishment request of the service k may include an initial access scenario or a handover scenario, where the initial access scenario is: for example, in the case that the terminal resides in the current RAT, a new service connection establishment request (e.g., a new service established by opening a web page) is initiated; the switching scene is as follows: a service connection establishment request triggered when handover between cells occurs at the terminal.

The following description will be given in different cases.

If lc (i) + lb (i) + le (i) < Th1(i), it indicates that the current free resources of the rai can carry both the basic subflow and the enhanced subflow of the service k, then the service k is not split, and the service k is completely carried by the rai.

If lc (i) + lb (i) + le (i) > < Th1(i), indicating that the current free resources of rai are not enough to carry the basic sub-stream and the enhanced sub-stream of the service k, further determining:

case 1: if lc (i) + lb (i) < Th1(i), indicates that the current free resources of rai can carry the basic sub-stream of service k, then the rai is used to carry the basic sub-stream of service k, and other RATs are searched for to carry the enhanced sub-stream of service k.

The specific method comprises the following steps: the CRRM acquires other RATs for the terminal load access condition, forming a set (denoted as R), where R ═ { RATj }, J ═ 1, 2 … …, J, indicating that the terminal has J other RATs satisfying the access condition, where J may be equal to i, i.e. the other RATs satisfying the access condition may be other cells except the cell where the terminal is located under rai.

If the set R is empty, the enhanced sub-stream of the service k is not sent.

If the set R is not empty:

respectively estimating a corresponding load value of an enhanced sub-flow of a service k under each RAT in a set R, and recording as le (J), wherein J is 1, 2 … …, and J;

calculating R1(j) ═ Th1(j) - (lc (j) + Le (j)), wherein R1(j) represents the residual load allowed to be distributed by the RATj after the enhanced sub-stream of the estimated service k is accessed to the RATj, selecting the maximum value R1(j ') from the obtained R1(j), and selecting the enhanced sub-stream of the service k carried by the RATj'. Wherein,

case 2: if lc (i) + lb (i) >, Th1(i), indicates that the current free resources of the rai cannot carry the basic subflow of the service k, a RAT that can carry the basic subflow of the service k and the enhanced subflow of the service k is preferentially selected from other RATs to carry the basic subflow and the enhanced subflow, and if the RAT that can carry the basic subflow of the service k is not selected from other RATs to carry the basic subflow, then another RAT carries the enhanced subflow of the service k.

If the set R is empty, the enhanced sub-stream of the service k is not sent.

If the set R is not empty:

respectively estimating load values corresponding to the base substream and the enhancer stream of the service k under each RAT in the set R, which are respectively denoted as lb (J) and le (J), wherein J is 1, 2 … …, J;

calculating R1(j) ═ Th1(j) - (Lc (j) + Lb (j) + Le (j)), R1(j) shows that after the base sub-stream and the enhancer stream of the estimated service k are accessed into RATj, RATj remaining load allowed to be distributed, and after obtaining a plurality of R1(j), selecting a coincidenceR1(j ') of the condition and selects the base substream and the enhancer stream that carry the traffic k by RATj'.

If the RAT meeting the above condition is not selected to carry the basic substream and the enhanced substream of the traffic k, then R1(j) is calculated to be Th1(j) - (lc (j) + lb (j)), and the RAT meeting the above condition is selected to carry the traffic kR1(j ') under the condition, and selecting the basic sub-stream carrying the service k by RATj', and then continuing to select the best RAT to carry the enhanced sub-stream of the service k, the selection method is as described in the above case 1, which is not described herein again, and if the RAT that does not meet the condition is not selected yet to carry the basic sub-stream of the service k, the connection establishment request of the service k is rejected.

Based on the above embodiment, referring to fig. 5, in an embodiment of the present invention, the CRRM includes: a communication unit 500 and a judgment unit 510.

A communication unit 500, configured to receive a service connection establishment request sent by a terminal;

a determining unit 510, configured to determine whether a current RAT can carry a basic sub-flow and an enhanced sub-flow of a corresponding service, where the basic sub-flow is used to indicate a service split that meets a minimum qos requirement of the corresponding service, and the enhanced sub-flow is used to indicate a service split that enhances a qos requirement;

if not, further judging whether the current RAT can bear the basic sub-flow of the corresponding service, if so, adopting the current RAT to bear the basic sub-flow of the corresponding service, and selecting other RATs meeting the first preset condition to bear the enhanced sub-flow of the corresponding service; otherwise, selecting the basic sub-flow and the enhanced sub-flow of the other RAT meeting the second preset condition to carry the corresponding service.

Preferably, when determining whether the current RAT can carry the basic sub-stream and the enhanced sub-stream of the corresponding service, the determining unit 510 is specifically configured to:

estimating a first load value corresponding to a basic sub-flow of a corresponding service under a current RAT, estimating a second load value corresponding to an enhanced sub-flow of the corresponding service under the current RAT, and comparing a first estimated total load value of the current RAT with a preset system load threshold value of the current RAT, wherein the first estimated total load value is the sum of the first load value, the second load value and the current system load value of the current RAT, and the system load threshold value is used for representing the maximum value of the load which can be carried by the current RAT;

if the first estimated total load value is smaller than the system load threshold value of the current RAT, judging that the current RAT can bear basic sub-flows and enhanced sub-flows of corresponding services;

and if the first estimated total load value is not less than the system load threshold value of the current RAT, judging that the current RAT can not bear the basic sub-flow and the enhanced sub-flow of the corresponding service.

Preferably, when determining that the current RAT cannot carry the basic sub-stream and the enhanced sub-stream of the corresponding service, the determining unit 510 further determines whether the current RAT can carry the basic sub-stream of the corresponding service, which specifically includes:

if the second estimated total load value is smaller than the preset system load threshold value of the current RAT, judging that the current RAT can bear the basic sub-flow of the corresponding service;

and if the second estimated total load value is not less than the preset system load threshold value of the current RAT, judging that the current RAT can not bear the basic sub-flow of the corresponding service.

Preferably, when selecting the enhanced sub-stream of the service carried by the other RAT meeting the first preset condition, the determining unit 510 is specifically configured to:

selecting all other RATs which accord with the access condition of the terminal, and generating a first RAT set, wherein the access condition is as follows: the measured value of the pilot signal of the terminal reaches the preset threshold of the RAT where the terminal is located, and the current system load value of the RAT where the terminal is located is smaller than the preset system load threshold value of the RAT where the terminal is located;

performing the following for each RAT included in the first set of RATs, respectively: estimating a third load value corresponding to the enhanced sub-flow of the corresponding service under one RAT, and calculating a difference value between a preset system load threshold value of one RAT and a third estimated total load value of one RAT, wherein the third estimated total load value is the sum of the third load value and a current system load value of one RAT;

Preferably, when selecting the basic sub-stream and the enhanced sub-stream of the service carried by the other RAT meeting the second preset condition, the determining unit 510 is specifically configured to:

selecting all other RATs which accord with the terminal access condition, and generating a second RAT set, wherein the access condition is as follows: the measured value of the pilot signal of the terminal reaches the preset threshold of the RAT where the terminal is located, and the current system load value of the RAT where the terminal is located is smaller than the preset system load threshold value of the RAT where the terminal is located;

performing the following for each RAT included in the second set of RATs, respectively: estimating a fourth load value corresponding to the basic sub-flow of the corresponding service under one RAT, estimating a fifth load value corresponding to the enhanced sub-flow of the corresponding service under one RAT, and calculating a difference value between a preset system load threshold value of one RAT and a fourth estimated total load value of one RAT, wherein the fourth estimated total load value is the sum of the third load value, the fourth load value and the current system load value of one RAT;

and generating a second difference set based on the difference value obtained by calculation aiming at each RAT contained in the second RAT set, selecting the difference value larger than zero in the second difference set to generate a first difference subset, and selecting the RAT corresponding to the maximum value in the first difference subset to bear the basic sub-flow and the enhanced sub-flow of the corresponding service.

Preferably, if the first subset of difference values is empty, the determining unit 510 is further configured to:

performing the following for each RAT included in the third set of RATs, respectively: estimating a sixth load value corresponding to the basic sub-flow of the corresponding service under one RAT, and calculating a difference value between a preset system load threshold value of one RAT and a fifth estimated total load value of one RAT, wherein the fifth estimated total load value is the sum of the sixth load value and a current system load value of one RAT;

and generating a third difference set based on the difference values obtained by calculation aiming at each RAT contained in the third RAT set, selecting the difference values larger than zero in the third difference set to generate a second difference subset, and selecting the RAT corresponding to the maximum value in the second difference subset to bear the basic sub-flow of the corresponding service.

Preferably, after the base sub-flow of the corresponding service is carried by using the current RAT, and the enhanced sub-flow of the corresponding service is carried by selecting another RAT meeting the first preset condition, the method further includes:

a merging unit 520, configured to record a first recommended scheduling time stamp in the base sub-stream data, where the first recommended scheduling time stamp is used to indicate a time when the base sub-stream of the corresponding service is recommended to be scheduled by the current RAT, and record a second recommended scheduling time stamp in the enhanced sub-stream data, where the second recommended scheduling time stamp is used to indicate a time when an enhanced sub-stream of the corresponding service is recommended to be scheduled by another RAT that meets a first preset condition, where a difference between the first recommended scheduling time and the second recommended scheduling time does not exceed a preset time difference threshold.

Based on the above embodiments, referring to fig. 6, in an embodiment of the present invention, a CRRM includes a processor 600 and a transceiver 610, where:

the processor 600, which is used to read the program in the memory 620, executes the following processes:

receiving a service connection establishment request transmitted by a terminal through a transceiver 610;

judging whether the current RAT can bear basic sub-flow and enhanced sub-flow of corresponding service, wherein the basic sub-flow is used for indicating service distribution meeting the minimum service quality of the corresponding service, and the enhanced sub-flow is used for indicating service distribution enhancing the service quality of the service;

A transceiver 610 for receiving and transmitting data under the control of the processor 600.

Preferably, when determining whether the current RAT can carry the basic sub-stream and the enhanced sub-stream of the corresponding service, the processor 600 is specifically configured to:

Preferably, when determining that the current RAT cannot carry the basic sub-stream and the enhanced sub-stream of the corresponding service, the processor 600 further determines whether the current RAT can carry the basic sub-stream of the corresponding service, which specifically includes:

Preferably, when selecting the enhanced subflows of the other RATs bearing the corresponding services meeting the first preset condition, the processor 600 is specifically configured to:

Preferably, when selecting the basic sub-stream and the enhanced sub-stream of the other RAT meeting the second preset condition to carry the corresponding service, the processor 600 is specifically configured to:

Preferably, if the first subset of differences is empty, the processor 610 is further configured to:

Preferably, after the base sub-flow of the corresponding service is carried by using the current RAT, and the enhanced sub-flow of the corresponding service is carried by selecting other RATs meeting the first preset condition, the processor 600 is further configured to:

recording a first recommended scheduling time tag in the basic sub-flow data, wherein the first recommended scheduling time tag is used for indicating the time for recommending the basic sub-flow of the corresponding service scheduled by the current RAT, and recording a second recommended scheduling time tag in the enhanced sub-flow data, wherein the second recommended scheduling time tag is used for indicating the time for recommending the enhanced sub-flow of the corresponding service scheduled by other RATs meeting a first preset condition, and the difference value between the first recommended scheduling time and the second recommended scheduling time does not exceed a preset time difference threshold value.

Where in fig. 6, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 600 and memory represented by memory 620. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 610 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. For different user devices, the user interface 630 may also be an interface capable of interfacing with a desired device externally, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 600 is responsible for managing the bus architecture and general processing, and the memory 620 may store data used by the processor 600 in performing operations.

In summary, in the embodiment of the present invention, after receiving a service connection establishment request sent by a terminal, a CRRMCRRM determines whether a current RAT can carry a basic sub-flow and an enhanced sub-flow of a corresponding service, where the basic sub-flow is used to indicate a service split that satisfies a minimum service quality of the corresponding service, and the enhanced sub-flow is used to indicate a service split that enhances the service quality; if yes, adopting the current RAT to bear the basic sub-flow and the enhanced sub-flow of the corresponding service; if not, further judging whether the current RAT can bear the basic sub-flow of the corresponding service, if so, adopting the current RAT to bear the basic sub-flow of the corresponding service, and selecting other RATs meeting the first preset condition to bear the enhanced sub-flow of the corresponding service; otherwise, selecting the basic sub-flow and the enhanced sub-flow of the other RAT meeting the second preset condition to carry the corresponding service. Therefore, under the condition that a certain RAT can meet the service requirement, service shunt scheduling is not carried out, the complexity of terminal realization can be reduced, the problem caused by asynchronous service data sub-flows received by a receiving side due to service shunt can be reduced, RAT resources can be fully and reasonably utilized, and the data transmission efficiency and the overall performance of the system are improved.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, 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, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments 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 encompass such modifications and variations.

Claims

1. A service distribution method under a multi-standard network is characterized by comprising the following steps:

after receiving a service connection establishment request sent by a terminal, a CRRM judges whether a current Radio Access Technology (RAT) can bear basic sub-flows and enhanced sub-flows of corresponding services, wherein the basic sub-flows are used for indicating service distribution meeting the minimum service quality of the corresponding services, and the enhanced sub-flows are used for indicating service distribution enhancing the service quality;

2. The method of claim 1, wherein determining whether the current RAT can carry the basic subflow and the enhanced subflow of the corresponding service comprises:

3. The method of claim 2, wherein when determining that the current RAT cannot carry the basic sub-stream and the enhanced sub-stream of the corresponding service, further determining whether the current RAT can carry the basic sub-stream of the corresponding service comprises:

4. The method according to claim 1, 2 or 3, wherein selecting the enhanced subflows of other RATs carrying the corresponding traffic meeting the first predetermined condition includes:

5. The method according to claim 1, 2 or 3, wherein selecting other RATs meeting a second predetermined condition to carry the basic sub-stream and the enhanced sub-stream of the corresponding service comprises:

6. The method of claim 5, wherein if the first subset of difference values is empty, further comprising:

7. The method of claim 1, 2 or 3, wherein after the base sub-flow of the corresponding service is carried by using a current RAT, and the enhanced sub-flow of the corresponding service is carried by selecting other RATs meeting a first preset condition, further comprising:

8. A service distribution device under a multi-standard network is characterized by comprising:

a determining unit, configured to determine whether a current radio access technology RAT can carry a basic sub-flow and an enhanced sub-flow of a corresponding service, where the basic sub-flow is used to indicate a service split that meets a minimum service quality of the corresponding service, and the enhanced sub-flow is used to indicate a service split that enhances the service quality;

9. The apparatus of claim 8, wherein when determining whether the current RAT can carry the basic sub-stream and the enhanced sub-stream of the corresponding service, the determining unit is specifically configured to:

10. The apparatus of claim 9, wherein when determining that the current RAT is not capable of carrying the basic sub-flow and the enhanced sub-flow of the corresponding service, the determining unit further determines whether the current RAT is capable of carrying the basic sub-flow of the corresponding service, specifically comprising:

11. The apparatus according to claim 8, 9 or 10, wherein, when selecting another RAT meeting a first preset condition to carry the enhanced sub-stream of the corresponding service, the determining unit is specifically configured to:

12. The apparatus according to claim 8, 9 or 10, wherein when selecting another RAT that meets a second preset condition to carry the basic sub-flow and the enhanced sub-flow of the corresponding service, the determining unit is specifically configured to:

13. The apparatus as claimed in claim 12, wherein if said first subset of differences is empty, said determining unit is further configured to:

14. The apparatus of claim 8, 9 or 10, wherein after the base sub-flow of the corresponding service is carried by using a current RAT, and the enhanced sub-flow of the corresponding service is carried by selecting other RATs meeting a first preset condition, further comprising: