CN100384298C - Implementation Method of Business Priority Scheduling - Google Patents

Abstract

The invention discloses a method for realizing service priority scheduling, which includes setting the priority scheduling order of various services and signaling; according to the total transmission rate required by various services and signaling and the respective required The transmission rate is to select the corresponding transmission format combination in the transmission format combination set in each transmission time interval; according to the transmission format corresponding to each dedicated channel in the selected transmission format combination, each channel with a high priority scheduling order Class services and signaling are preferentially scheduled and transmitted on corresponding dedicated channels. The invention can make the service priority scheduling process on the special channel in the 3G communication network system feasible, and realize the service priority scheduling function of the special channel.

Description

Implementation Method of Business Priority Scheduling

technical field

The invention relates to the technical field of the third generation mobile communication, in particular to a method for realizing service priority scheduling.

Background technique

In the 3G standard formulated by 3GPP, it is stipulated that the user's dedicated channel (DCH, DedicateChannel) should have a service priority scheduling function, wherein the service priority scheduling specifically refers to when the user has multiple services at the same time and needs to perform transmission scheduling. When and at what rate to transmit the corresponding services are determined according to the priority order of the services. Generally, in the user's DCH, high-priority services can obtain a larger transmission bandwidth than low-priority services, and can be transmitted preferentially. For example: if a user activates two packet domain services (PS, Packet domainService) at the same time, one of which is video on demand and the other is web browsing, if the priority of the video on demand service is higher than that of the web browsing service, the video The on-demand service will be transmitted preferentially on the user's DCH. Among them, in the 3G standard, the purpose of setting the service priority scheduling function on the user's DCH is to reduce the transmission delay of high-priority services, so as to ensure the priority transmission of high-priority services to the greatest extent.

Among them, the 3G standard stipulates that the service priority scheduling function in the user DCH should be completed in the Media Access Control (MAC, Media Access Control) sublayer of the wireless interface layer of the network, and the wireless interface layer in the mobile communication network is mainly composed of 4 sublayers. The main functions of the MAC sublayer are:

Complete the mapping of business data from logical channels to transmission channels during the transmission process, and complete the reconfiguration and measurement of some wireless resources under the instructions of the control plane.

The MAC sublayer specifically includes two parts: a media access control common part (MACC, Media Access Control Common) and a media access control dedicated part (MACD, Media Access Control Dedicate). Among them, MACC is mainly responsible for the business data transmission of the common channel (CCH, Common Channel). , the MACD is mainly responsible for the service data transmission of the user DCH. And MACC corresponds to a cell (Cell) in the mobile communication network, that is, one Cell corresponds to one MACC instance; MACD corresponds to a mobile terminal (UE, User Equipment) in the mobile communication network, that is, one UE corresponds to one MACD instance.

Among them, in the 3GPP TS 25.321 agreement, it is clearly stipulated that the service priority scheduling function on the user DCH should be completed by the MACD in the MAC sublayer, and the main process for the MACD to complete the service priority call function on the user DCH is as follows:

The Service GPRS Support Node (SGSN, Service GPRSSupport Node) in the mobile communication network system sends a Radio Access Bearer Assignment Request (RAB Assignment Request) message carrying a Traffic Handling Priority cell (Traffic Handling Priority) to the wireless network Controller (RNC, Radio Network Controller), wherein the Traffic Handling Priority information element carried in the RAB Assignment Request message is specially set for interactive (Interactive) services, and the value range of the Traffic Handling Priority information element is 0 to 15, Among them, 1 to 14 represent descending priorities, that is, "1" represents the highest priority of Interactive services, "14" represents the lowest priority of Interactive services, "0" represents logic errors, and "15" represents no priority for Interactive services; RNC According to the value of the received Traffic Handling Priority cell, it is determined when and with what transmission bandwidth to transmit the corresponding Interactive service. In the 3G standard formulated by 3GPP, the reason why the Traffic Handling Priority cell is specially set for Interactive services is that various Interactive services have different requirements on service quality (QoS, Quality of Service) and transmission delay. Therefore, each Interactive service must have a different priority call sequence in the transmission process.

However, in the 3G standard formulated by 3GPP, only the process described above stipulates that the Traffic Handling Priority cell is used to identify the priority calling relationship of different Interactive services, and the RNC performs each Interactive service according to the value of the Traffic Handling Priority cell Priority call processing; how to perform priority scheduling configuration for various communication services and signaling in the 3G network system, and configure the corresponding scheduling parameters accordingly, so that the Universal Terrestrial Radio Access Network (UTRAN, Universal Terrestrial Radio Access Network) The process in which the internal MACD of the MACD can implement priority scheduling of various services on the user DCH according to priority scheduling configurations of various communication services and signaling and corresponding scheduling parameters is not described in detail.

Contents of the invention

The technical problem to be solved by the present invention is to propose a service priority scheduling implementation method, so as to make the service priority scheduling process on the dedicated channel in the 3G communication network system feasible and realize the service priority scheduling function of the dedicated channel.

In order to solve the above problems, the present invention proposes a method for implementing business priority scheduling, comprising steps:

Set the priority scheduling sequence of various services and signaling;

According to the total transmission rate required by various services and signaling and the respective transmission rates required by various services and signaling, select the corresponding transmission format combination from the transmission format combination set in each transmission time interval;

According to the transmission format corresponding to each dedicated channel in the selected transmission format combination, all kinds of services and signaling with high priority scheduling order are preferentially scheduled to be transmitted on the corresponding dedicated channel.

The priority scheduling sequence for various services and signaling settings is as follows:

The priority of radio resource control signaling is higher than that of various services; and

Among the various types of services, the priority of real-time services is higher than that of non-real-time services.

Wherein the real-time service includes conversation service and streaming service, and the priority of the conversation service is higher than that of the streaming service; the non-real-time service includes interactive service and background service, and the priority of the interactive service is Priority over background business.

Different interactive services have different priorities, and the order of priorities among different interactive services is determined according to the value of the service processing priority information element contained in the radio access bearer assignment request message.

According to the priority scheduling order of real-time services, each real-time service is scheduled to be transmitted on different dedicated channels respectively.

Then according to the total transmission rate required by various services and signaling and the sum of the transmission rates occupied by each dedicated channel for transmitting real-time services, the sum of the remaining transmission rates is obtained;

And according to the priority scheduling order of non-real-time services, each non-real-time service is scheduled to be transmitted on different dedicated channels, and the sum of the transmission rates occupied by each dedicated channel for transmitting non-real-time services is less than or equal to The sum of the remaining transmission rates.

Wherein on each of the dedicated channels, according to the priority scheduling order of each non-real-time business, the transmission format is preferentially selected for the high-priority non-real-time business, so that the high-priority non-real-time business is preferentially transmitted on the corresponding dedicated channel .

When the priority scheduling sequence of each non-real-time business is the same, first select the transmission format for each non-real-time business in turn according to chronological order, so that each non-real-time business is preferentially transmitted on the corresponding dedicated channel in chronological order .

Or according to the total transmission rate required by various services and signaling and the sum of the transmission rates occupied by each dedicated channel for transmitting real-time services, the sum of the remaining transmission rates is obtained;

And according to the priority scheduling order of the non-real-time business, multiplex each non-real-time business on the same dedicated channel for transmission, and make the transmission rate occupied by the dedicated channel for transmitting the non-real-time business less than or equal to the remaining transmission rate sum of speeds.

Wherein, on the multiplexed dedicated channel, according to the priority scheduling sequence of each non-real-time service, the high-priority non-real-time service to the low-priority non-real-time service are sequentially transmitted.

When the priority scheduling order of the various non-real-time services is the same, on the multiplexed dedicated channel, each non-real-time service is sequentially transmitted in chronological order.

The service priority scheduling realization method of the present invention is through according to each transmission time interval (TTI) , Transmission Time Interval) selects the corresponding transmission format combination (TFC, Transport Format Combination) in the transmission format combination set (TFCS, Transport Format Combination Set), so that according to the transmission format (TF, Transport Format Combination) corresponding to each DCH in the selected TFC Format) to schedule all kinds of services and signaling to the corresponding DCH for transmission, thereby realizing the feasible scheduling process of service priority on the DCH in the 3G communication network system and realizing the service priority scheduling function on the DCH.

Description of drawings

Fig. 1 is a schematic diagram of the process of transmitting a transport block on a dedicated channel in an existing mobile communication network system;

Fig. 2 is a flow chart of the main realization principles of the method for implementing service priority scheduling in the present invention.

Detailed ways

The implementation method of service priority scheduling in the present invention aims at not specifically designing the process of service priority scheduling on DCH in the prior art, and proposes to combine various services and The total transmission rate of the signaling and the transmission rates required by various services and signaling are selected from the Transport Format Combination Set (TFCS, Transport Format Combination Set) corresponding to the Transport Format Combination (TFC, Transport Format Combination). The transmission format (TF, Transport Format) corresponding to each DCH in the TFC schedules various services and signaling to the corresponding DCH for transmission, thus realizing the sharing of various services and signaling on the basis of priority scheduling order The transmission bandwidth provided by multiple DCHs achieves the purpose of transmitting various services and signaling on each DCH according to the order of priority scheduling.

The specific implementation process of the service priority scheduling implementation method of the present invention will be described in detail below in conjunction with each drawing.

Firstly, several concepts commonly used on the DCH in the 3G communication network system are introduced. Please refer to Figure 1, which is a schematic diagram of the transmission process of the transmission block on the dedicated channel in the existing mobile communication network system. Among them, several concepts commonly used on the DCH The concepts are as follows:

1) Transport Block (TB, Transport Block): the basic unit of data transmission on DCH;

2) Transport Block Set (TBS, Transport Block Set): a set of multiple TBs transmitted within a certain transmission time interval TTI;

3) Transmission Time Interval (TTI, Transmission Time Interval): the length of time to transmit a certain TBS, in which the Media Access Control (MAC, Media Access Control) layer will transmit a TBS to the physical layer within each TTI;

4) Transmission format (TF, Transport Format): For each DCH, within each transmission time interval TTI, there is a transmission format TF, where TF consists of two parts: a dynamic part and a semi-static part, where the dynamic part includes TB size (refers to the number of bits of 1 TB) and TB num (refers to the number of TBs allowed to be transmitted within one TTI on the DCH); the semi-static part includes TTI information, etc.; therefore, the transmission format TF determines the number of TBs at a certain transmission moment Transmission rate = TB size × TB num/TTI;

5) Transport format set (TFS, Transport Block Set): For a DCH, there can be several TFs, and these TFs constitute the transport format set (TFS: Transport Format Set) of the DCH;

6) Transport Format Combination (TFC, Transport Format Combination): multiplex one or several DCHs in the physical layer (L1), so that in a certain TTI, the transport format combination TFC of each DCH is formed; this The combination is defined in the standard as the current reasonable transmission format TF permission combination, which can be provided to the physical layer L1 for the transmission of the Coded Composite Transport Channel (CCTrCH, Coded CompositeTransport Channel);

7) Transport Format Combination Set (TFCS: Transport Format Combination Set): The set of TFCs in the CCTrCH constitutes the Transport Format Combination Set TFCS.

Please refer to Fig. 2, which is a flow chart of the main realization principle of the method for implementing service priority scheduling in the present invention, and its main realization process is as follows:

Step S10, setting the priority scheduling order of various services and signaling; wherein the set priority scheduling order is that the priority of radio resource control signaling (RRC, Radio Resource Control) is higher than the priority of various services; The priority of the real-time business in the business is higher than that of the non-real-time business. Among them, the real-time business includes conversational business (Conversational) and streaming business (Streaming), and the priority of conversational business (Conversational) is required to be higher than that of streaming business (Streammg); the non-real-time business includes interactive business (Interactive) and background business (Background), and require the priority of interactive business (Interactive) to be higher than the priority of background business (Background).

At the same time, different interactive services (Interactive) are required to have different priorities. The order of priority among different interactive services (Interactive) can be based on the service processing priority information contained in the radio access bearer assignment request (RABAssignment Request) message. It is determined by the value of Traffic HandlingPriority.

In fact, in the existing standards, strictly speaking, the traffic handling priority cell (Traffic HandlingPriority) is only for interactive services (Interactiye), but the present invention can expand the concept of traffic handling priority, such as according to the following priority The level scheduling sequence is used to uniformly configure all services and signaling:

1) Priority configuration of various services: Conversational service priority > Streaming service priority > Interactive service priority > Background service priority. Here, it does not distinguish whether the various services are core network service types, that is, the conversational (Conversational) service in the packet service domain (PS, Packet domain Service) and the conversational (Conversational) service in the circuit service domain (CS, Circuit domain Service) The priority is the same.

2) And within the same type of business, other business types except interactive business (Interactive) do not distinguish priority order; between interactive business (Interactive), use "Traffic Handling Priority" cells to distinguish different priority scheduling orders ;

3) The priority of signaling on a dedicated control channel (DCCH, Dedicated Control Channel) is higher than that of various services on a dedicated traffic channel (DTCH, Dedicated Traffic Channel).

Based on the priority scheduling sequence of various services and signaling extended above, the configured priority scheduling sequence of various services and signaling can be mapped to the relevant user plane scheduling parameters that reflect the quality of service (QoS). The order of level scheduling is as follows:

RRC signaling priority > Conversational service priority > Streaming service priority > Interactive service priority "1" > Interactive service priority "2" >... > Interactive (Interactive) service priority "14" > interactive (Interactive) service priority "15" > background (Background) service priority. That is, the two principles that various services and signaling satisfy are:

a. The priority of RRC signaling is higher than that of various services;

b. The priority of real-time business is higher than that of non-real-time business;

c. The priority between different interactive (Interactive) services is determined according to the value of the "Traffic Handling Priority" information element in the RAB assignment request message.

Step S20, according to the total transmission rate required by various services and signaling of the user and the respective transmission rates required by various services and signaling, select the corresponding transmission format combination set TFCS in each transmission time interval TTI format combination TFC;

Step S30, according to the transmission format TF corresponding to each dedicated channel DCH in the selected transmission format combination TFC, all kinds of services and signaling with priority scheduling order are preferentially scheduled to the corresponding dedicated channel DCH for transmission.

For real-time services (including conversational service Conversational and stream service Streaming), each real-time service should be dispatched to different DCHs for transmission according to the priority scheduling sequence of each real-time service. That is, according to the priority scheduling order of each real-time service, the real-time service with higher priority is firstly scheduled to be transmitted on the corresponding DCH, and then the real-time service with lower priority is scheduled to be transmitted on other corresponding DCHs in turn. .

For different non-real-time services (including interactive service Interactive and background service Background), multiple non-real-time services can be scheduled to different DCHs for transmission according to the priority scheduling order of different non-real-time services, or can be Multiplex non-real-time services on the same DCH for transmission.

In the case of scheduling multiple non-real-time services to different DCHs for transmission, it should be based on the total transmission rate required by various services and signaling and the transmission rate occupied by each DCH transmitting the above-mentioned real-time services to obtain the sum of the remaining transmission rates of the corresponding users; and then according to the priority scheduling order of different non-real-time services, each non-real-time service is scheduled to be transmitted on different DCHs, and at the same time, the transmission of non-real-time services must be ensured. The sum of the transmission rates occupied by each DCH of the real-time service is less than or equal to the sum of the remaining transmission rates obtained above. The specific explanation of this situation is as follows:

When DCH is configured, logical channel multiplexing from DTCH to DCH is not configured, that is, a DCH only corresponds to the transmission of one service or signaling. At this time, priority scheduling for different services and signaling is reflected in TFCS configuration and TFC selection. Among them, for real-time services such as session and streaming services, there is a certain delay requirement for service data transmission, so it is necessary to fully ensure that these service data can be transmitted in time. For non-real-time services such as interactive services and background services, these services are generally called Best Effort (BE, Best Effort) services. BE services require transmission only when the network has remaining bandwidth. No transmission is required when there is no remaining bandwidth due to non-specific services. Therefore, the BE service data rate is determined by UTRAN based on the comprehensive consideration of the service source data rate and the load status of the air interface. This type of service is characterized by a wide range of service source data rates, and its quality of service (QoS) has a significant impact on the transmission bandwidth. No special requirements. Therefore, in view of this characteristic of the BE service, in order to save resources (such as code resources, etc.), when two or more BE services are transmitted at the remaining transmission rate, it can be restricted that they cannot be transmitted at the full rate at the same time. Therefore, the fully configured TFC is not selected in the configured TFCS (full configuration refers to the full arrangement set of TFS of each DCH), mainly to ensure that when a user has two or more BE services that need to be transmitted, In the user's TFCS, the maximum TF combination of the DCHs used to transmit the two BE services cannot be selected. During transmission, the user's TFCS cannot select the maximum TF combination of DCHs used to transmit two BE services.

Based on the above principles, the priority scheduling transmission sequence for each service and signaling is as follows:

1) Guarantee the priority transmission of RRC signaling and PS/CS real-time services;

2) When two BE services occupy different DCHs for transmission, it is necessary to ensure that the DCH occupied by the BE service with high priority transmits data first, and at the same time, the DCH occupied by the BE service with low priority is not completely blocked for data transmission.

For clarity, an example is given below to illustrate the TFC and TFCS configurations in which multiple BE services occupy different DCHs for transmission, that is, how to schedule corresponding services according to the pre-configured service priority scheduling order Or signaling is assigned to the corresponding DCH for transmission; for simplicity, in the following example, signaling and other non-BE services are not considered, and only the combination of two BE services is considered:

Assuming that a user equipment (UE, User Equipment) accesses two BE services at the same time within a certain period of time, the maximum transmission rate of the two BE services is 384kbp, but the remaining transmission rate for the UE is 445kbp. The RNC allocates one DCH to each of the two BE services, which are respectively recorded as BE1 DCH and BE2 DCH. Assume that the priority of BE1 service is set higher than that of BE2 service, so configure the priority of BE1 DCH to be higher than that of BE2 DCH. The configurations of the transmission format set TFS and the transmission format combination set TFCS of the two DCHs are as follows:

(1) The TFS of each DCH is (TF0, TF1, TF2, TF3, TF4), the TTI is 10ms, and the TBsize is 336kbp;

Among them, TF0 corresponds to 0×336; TB NUM×TB size

TF1 corresponds to 1×336;

TF2 corresponds to 2×336;

TF3 corresponds to 8×336;

TF4 corresponds to 12×336;

That is, the TB NUMs corresponding to the above TF0~TF4 are 0, 1, 2, 8, and 12 respectively.

(2) The TFC that can be selected in the configuration TFCS corresponding to the UE is:

(TF0, TF0), (TF0, TF1), (TF0, TF2), (TF0, TF3), (TF0, TF4), (TF1, TF0), (TF1, TF1), (TF1, TF2), (TF1 , TF3), (TF1, TF4), (TF2, TF0), (TF2, TF1), (TF2, TF2), (TF2, TF3), (TF3, TF0), (TF3, TF1), (TF3, TF2 ), (TF4, TF0), (TF4, TF1);

Compared with the full configuration of TFCS (the so-called full configuration means that each TF in the two DCHs can form a TFC, then the number of TFCs in the full configuration should be 5×5=25) lacks ( TF2, TF4), (TF3, TF3), (TF3, TF4), (TF4, TF2), (TF4, TF3) and (TF4, TF4) several TFCs, because the selection of these TFCs will cause the transmission of two The sum of the transmission rates of the DCHs of the BE services is greater than 445kbp, so none of them meet the requirements. The reason for selecting the corresponding TFC in the configured TFCS is that BE services generally have the characteristics of data bursts. From a long-term perspective, there will not be two BE services that deliver high-speed data. In the segment, one of the BE services may have data to be transmitted, while the other BE service has no data to be transmitted or the amount of data to be transmitted is small. Therefore, when disposing the CCTrCH total bandwidth, it is possible to configure the remaining bandwidth except the required bandwidth for transmitting real-time services to be less than the sum of the maximum rates of these two BE services; otherwise, the transmission bandwidth (including Iub, Uu interfaces) may be affected Transmission bandwidth) causes waste, so this configuration is reasonable, it considers the statistical law of data transmission of BE business, thus introduces the idea of bandwidth sharing, and because BE business itself is a best-effort transmission business, there is no requirement to guarantee the rate , so this choice is reasonable.

(3) The priority scheduling process of two BE services:

Assume that in a certain period of time, there are a lot of data to be transmitted on the two DCHs used to transmit the two BE services respectively. For example, the data source transmission rate of the two BE services must be greater than or equal to 384kbps. At any time, MACD needs to perform priority scheduling. According to the priority scheduling strategy, the BE service with high priority is guaranteed to be transmitted first. Therefore, TF4 is selected for BE1 DCH, and only TF1 can be selected for BE2 DCH of BE service with low priority. . That is, for the BE1 service, the transmission rate of 12×(336-16)/10=384kps can be satisfied (the 16 in the formula represents the header bits that need to be deleted when the data is transmitted from the MAC layer to the RLC layer), while for the BE2 service, it can be Satisfy the rate transmission of 1*(336-16)/10=32kps.

Among them, on each DCH used to transmit non-real-time services, according to the priority scheduling sequence of each BE service, TF selection can be performed preferentially for high-priority BE services, that is, high-priority services can be guaranteed in the total transmission bandwidth of BE services BE services are given priority to obtain more transmission bandwidth.

In addition, when the priority scheduling order of each BE service is the same, on each DCH used to transmit BE services, TF selection can be performed on each BE service in turn in chronological order, so that each BE service can follow The time sequence is transmitted on the corresponding DCH first.

The above scheme can make the DCH corresponding to the high-priority BE service have the priority selection right; and while enabling the high-priority BE service data to be transmitted preferentially, it can also ensure that the low-priority BE service data can be transmitted with a certain amount of traffic. Therefore, it is possible to avoid the reset of the radio link control protocol (RLC, Radio LinkControl) layer corresponding to the BE service caused by the low-priority BE service being unscheduled for a long time. That is, when it is confirmed that the low-priority BE service has data to send, the transmission bandwidth must be allocated to it. The transmission bandwidth should be as small as possible, but it should be able to ensure that the RLC layer of the RNC and the RLC layer of the UE can perform status reports in a timely manner. Delivery of messages.

In addition, when multiple BE services are multiplexed on the same DCH for transmission, the total transmission rate required by various services and signaling and the transmission rate occupied by each dedicated channel for transmitting real-time services must also be considered. to obtain the sum of the remaining transmission rates; then according to the priority scheduling order of two or more different BE services, each BE service is multiplexed on the same DCH for transmission, and the DCH for transmitting BE services The occupied transmission rate is less than or equal to the sum of the remaining transmission rates obtained above. The specific explanation of this situation is as follows:

The TFCS of each DCH adopts full configuration, and each BE service must be multiplexed on the same DCH for transmission. When the transmission format TF of a DCH is determined, the transmission rate determined by the TF can be used to transmit each BE service.

On the multiplexed DCH, according to the priority scheduling order of each BE service, the high priority BE service to the low priority BE service can be transmitted sequentially, that is, for each BE service to be transmitted on the DCH In other words, "high rate" traffic is allocated to BE services with higher priority, and "low rate" traffic (or even 0 rate) is allocated to BE services with lower priority.

Here is another example to illustrate the configuration of TFC and TFCS when multiple BE services are multiplexed on the same DCH, that is, how to schedule the corresponding services or signaling Assigned to the corresponding DCH for transmission:

Assuming that a certain UE accesses two BE services at the same time within a certain period of time, the maximum transmission rate of the two BE services is 384kbp, but the remaining transmission rate for the UE is 445kbp. The RNC allocates only one DCH to the two BE services, assuming that the DCH is logically divided into two dedicated traffic channels DTCH, that is, the two BE services use a DTCH for transmission respectively, recorded as BE1DTCH and BE2 DTCH, That is, the two DTCHs respectively used to transmit the two BE services are multiplexed on the same DCH. Assume that the priority of the BE1 service is higher than that of the BE2 service, so when configuring the priority of the DTCHs transmitting the two BE services, configure the priority of the BE1 DTCH to be higher than that of the BE2 DTCH. The transmission format set TFS configuration of this DCH is as follows:

The TFS of the DCH is (TF0, TF1, TF2, TF3, TF4), the TTI is 10ms, and the TB size is 336kbp;

Among them, TF0 corresponds to 0×336; TB NUM×TB size

TF1 corresponds to 1×336;

TF2 corresponds to 2×336;

TF3 corresponds to 8×336;

TF4 corresponds to 12×336;

That is, the TB NUMs corresponding to the above TF0~TF4 are 0, 1, 2, 8, and 12 respectively.

Assume that the two DTCHs used to transmit the two BE services have a lot of data to be transmitted, for example, the data source transmission rates of the two BE services are both greater than or equal to 384 kbps. Therefore, within a certain period of time, it is determined that the transmission format of the DCH is TF4, that is, 12 TB blocks can be transmitted in one TTI, and these 12 TB blocks need to be allocated between two DTCHs respectively. Since the priority of BE1 DTCH is higher than that of BE2 DTCH, these 12 TB blocks are allocated to BE1 DTCH, then BE2DTCH will not be able to transmit data. That is, for the BE1 service, a full transmission rate of 12*(336-16)/10=384 kps can be obtained, while for the BE2 service, the available transmission rate can only be 0 kps.

When the priority scheduling order of each BE service is the same, each BE service is sequentially transmitted in chronological order on the multiplexed DCH, that is, each BE service of the same priority is transmitted in turn in chronological order, To ensure the fairness of each BE service with the same priority being transmitted separately, for example, at the time when the previous BE service data is sent, the DCH is used to transmit BE1 service, and at the time when the next BE service data is sent, the DCH is used to transmit BE2, and then transmitted BE1 business, BE2 business....

However, there is a shortcoming in the above solution, that is, since the standard does not define the traffic allocation algorithm among DTCHs in DCH, the MACD of UE shall adopt the following scheduling scheme when processing service priority scheduling: the high priority DTCH sends the BE service data After that, the DTCH with low priority can be allowed to send BE service data. This may cause the RLC corresponding to the low-priority DTCH to be reset. This situation occurs when the low-priority BE service data has not been fully confirmed, and the high-priority BE service data has data for a period of time thereafter. hair.

It should also be noted here that although the preferred embodiment of the present invention has been described above, multiple transformations and changes can also be made to the above-mentioned disclosed solutions, as long as they do not depart from the scope defined by the claims of the present invention, they all fall within the scope of the present invention. within the scope of protection.

Claims (10)

1. A method for implementing business priority scheduling, characterized in that, comprising steps: Set the priority scheduling sequence of various services and signaling; According to the total transmission rate required by various services and signaling and the respective transmission rates required by various services and signaling, select the corresponding transmission format combination from the transmission format combination set in each transmission time interval; According to the transmission format corresponding to each dedicated channel in the selected transmission format combination, all kinds of services and signaling with high priority scheduling order are preferentially scheduled to be transmitted on the corresponding dedicated channel. 2. The service priority scheduling implementation method as claimed in claim 1, wherein the priority scheduling sequence set for various services and signaling is: The priority of radio resource control signaling is higher than that of various services; and Among the various types of services, the priority of real-time services is higher than that of non-real-time services. 3. the service priority scheduling implementation method as claimed in claim 2, is characterized in that, The real-time service includes session service and stream service, and the priority of the session service is higher than that of the stream service; The non-real-time service includes interactive service and background service, and the priority of the interactive service is higher than that of the background service. 4. The method for implementing service priority scheduling according to claim 3, wherein different interactive services have different priorities, and the priority order between different interactive services is based on the information contained in the radio access bearer assignment request message. It is determined by the value of the service processing priority information element. 5. The method for implementing service priority scheduling according to claim 3, characterized in that, according to the priority scheduling sequence of real-time services, each real-time service is scheduled to be transmitted on different dedicated channels. 6. the service priority scheduling implementation method as claimed in claim 5, is characterized in that, According to the total transmission rate required by various services and signaling and the sum of the transmission rates occupied by each dedicated channel for transmitting real-time services, the sum of the remaining transmission rates is obtained; And according to the priority scheduling order of non-real-time services, each non-real-time service is scheduled to be transmitted on different dedicated channels, and the sum of the transmission rates occupied by each dedicated channel for transmitting non-real-time services is less than or equal to The sum of the remaining transmission rates. 7. The method for realizing business priority scheduling as claimed in claim 6, wherein, on each of the dedicated channels, according to the priority scheduling order of each non-real-time business, the high-priority non-real-time business is preferentially selected The transmission format enables high-priority non-real-time services to be preferentially transmitted on the corresponding dedicated channels. 8. The method for implementing business priority scheduling as claimed in claim 6, wherein, when the order of priority scheduling for each non-real-time business is the same, at first each non-real-time business is selected and transmitted sequentially in chronological order. format, so that each non-real-time service is preferentially transmitted on the corresponding dedicated channel in chronological order. 9. The service priority scheduling implementation method as claimed in claim 5, characterized in that, According to the total transmission rate required by various services and signaling and the sum of the transmission rates occupied by each dedicated channel for transmitting real-time services, the sum of the remaining transmission rates is obtained; And according to the priority scheduling order of the non-real-time business, multiplex each non-real-time business on the same dedicated channel for transmission, and make the transmission rate occupied by the dedicated channel for transmitting the non-real-time business less than or equal to the remaining transmission rate sum of speeds. 10. The service priority scheduling implementation method as claimed in claim 9, characterized in that, on the multiplexed dedicated channel, according to the priority scheduling sequence of each non-real-time business, the high-priority non-real-time Transmit sequentially from business to low-priority non-real-time business; or When the priority scheduling order of the various non-real-time services is the same, on the multiplexed dedicated channel, each non-real-time service is sequentially transmitted in chronological order.

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