JP5564350B2 - Service multiplexing processing method and apparatus - Google Patents

Description

  The present invention relates to the communication and Internet technical fields, and more particularly, to a service multiplexing processing method and apparatus.

  How to allocate resources to services in a communication system is a very important issue. When allocating resources, the quality of service (QoS) requirement of the service must be guaranteed, and the price of the system must be minimized. For both wired and wireless networks, system consideration mainly includes link bandwidth and buffer area capacity. For wireless networks, link bandwidth becomes more important.

  For example, the average speed of a single video service stream is 320 kbps, and the QoS requirement is that 90% of packets have no transfer delay. To satisfy the above requirements, the link bandwidth (ie link service speed) must be 340 kbps or higher.

When three independent video service streams, each with an average rate of 320 kbps, are mixed and transmitted, each service is independent, so when one service reaches the peak rate, the other service has a data rate. May be in the valley. Therefore, when three independent video service streams, each with an average rate of 320 kbps, are mixed and transmitted, the overall data rate change is more gradual and the QoS requirements are the same (90% packets). If the link service speed is 1000 kbps, there is no transfer delay, and the request can be satisfied. The service speed is less than 340 × 3 = 1020 kbps, resulting in multiplexing gain. The calculation of the multiplexing gain is as follows.

  Although the video service has been described above as an example, it will be understood that multiplexing gain exists when other types of services are mixed and transmitted.

  For convenience of description, in the present application documents, two or more service streams that are mixed and transmitted are referred to as multiplexed service streams.

  As can be seen from the above description, the multiplexing gain must be considered when allocating link resources to the multiplexed service stream. The resource allocation problem is an optimization problem, and when the packet loss request (QoS request) is satisfied as a goal for solving the optimization problem, the total link bandwidth required for all services is minimized. It is to be.

  Of course, from another perspective, the goal may be to maximize the number of accessible service streams when the packet loss request (QoS request) and the link bandwidth request are satisfied.

  However, in any case, it is important to obtain the packet loss rate, and the packet loss rate of the multiplexed stream is related to the service characteristics, the number of services, the link bandwidth, the capacity of the buffer area, and the like. .

  Conventional packet loss rate acquisition methods include an approximation method based on Brown Bridge.

In the approximation method based on the Brown Bridge, the Brownian motion is indicated by B (t), and the following formula is established for the average value and the variance.

  If the service stream satisfies the characteristics of Brown Bridge, its probability distribution function can be obtained explicitly.

If an arbitrary service stream does not satisfy the Brown Bridge characteristic, approximate μ and σ ² can be obtained by an approximation method based on the Brown Bridge, and further a packet loss probability can be obtained. An expression representing the packet loss probability L of the current multiplexed service stream is as follows.

B: Size of the buffer allocated to the current multiplexed service stream
C: Link bandwidth allocated to the current multiplexed service stream
N: Number of service streams in the current multiplexed service stream μ: Average data rate of the current multiplexed service stream σ ² : Dispersion of data rate of the current multiplexed service stream.

  When L is acquired, resource allocation and access control can be performed.

  However, when the inventor realized the embodiment of the present invention, he discovered that at least the following deficiencies exist in the above method of approximating the information source by Brown Bridge.

  Although the method of approximating the information source by Brown Bridge is simpler than the information source model construction method by semi-Markov, it is still necessary to acquire complex information source features. The information source feature includes not only simple features such as an average value and a peak speed but also more complicated information such as a state transition probability and a state residence time. In an actual system, it is almost impossible to acquire accurate information source features. Therefore, the method of approximating the information source by the Brown Bridge cannot be applied to a complicated service stream.

  An object of the present invention is to provide a service multiplexing processing method and apparatus, and to reduce the difficulty of realizing multiplexed resource allocation or access control.

  In order to achieve the above object, an embodiment of the present invention provides a service multiplexing processing method.

In the method,
Obtaining a transmission characteristic of a first service stream that is a service stream currently being multiplexed and transmitted having the first characteristic;
Based on the transmission characteristics of the first service stream, calculate the variance σ ² of the first service stream,
When the new service stream having the first feature joins, the variance σ ² is a service stream of multiplexed transmission formed after the new service stream is joined to the first service stream. As a distribution of the second service stream, an expression representing the packet loss rate of the second service stream is acquired,
Based on the expression representing the packet loss rate, resource allocation or access control is performed for the new service stream.

In the service multiplexing processing method, the transmission characteristics of the first service stream include packet loss rate L _i of the first service stream, data rate average value μ of the first service stream, and the first service stream. It includes the link bandwidth C _i allocated to the stream, the buffer size B _i allocated to the first service stream, and the number i of sub-service streams in the first service stream.

In the service multiplexing processing method, the distribution of the first service stream is

  It is.

In the service multiplexing processing method, B _i is less than or equal to the product of C _i and D, which is the maximum queuing delay required for the first service stream.

In the service multiplexing processing method, an expression representing the packet loss rate of the second service stream is as follows.

C _{i + 1} : Link bandwidth allocated to the second service stream
B _{i + 1} : size of the buffer allocated to the second service stream
B _{i + 1} : Less than the product of C _{i + 1} and D μ: Average data rate value of the second service stream σ ² : Dispersion of the first service stream To achieve the above object, The embodiments of the invention further provide a service multiplexing processor.

The service multiplexing processing device includes:
A feature acquisition module for acquiring a transmission characteristic of a first service stream that is a service stream currently being multiplexed and transmitted having the first characteristic;
A variance calculation module for calculating a variance σ ² of the first service stream based on transmission characteristics of the first service stream;
When the new service stream having the first feature joins, the variance σ ² is a service stream of multiplexed transmission formed after the new service stream is joined to the first service stream. A packet loss rate acquisition module that acquires an expression representing the packet loss rate of the second service stream as the distribution of the second service stream;
And a service processing module for performing resource allocation or access control on the new service stream based on the expression representing the packet loss rate.

In the service multiplexing processing apparatus, the transmission characteristics of the first service stream include packet loss rate L _i of the first service stream, data rate average value μ of the first service stream, and the first service stream. It includes the link bandwidth C _i allocated to the stream, the buffer size B _i allocated to the first service stream, and the number i of sub-service streams in the first service stream.

In the service multiplexing processing apparatus, the distribution of the first service stream is

  It is.

In the service multiplexing processing apparatus, B _i is equal to or less than the product of C _i and D, which is the maximum queuing delay required for the first service stream.

In the service multiplexing processing apparatus, an expression representing the packet loss rate of the second service stream is as follows.

C _{i + 1} : Link bandwidth allocated to the second service stream
B _{i + 1} : size of the buffer allocated to the second service stream
B _{i + 1} : Less than the product of C _{i + 1} and D μ: Average data rate of the second service stream.

  In order to achieve the above object, the embodiment of the present invention further provides a service multiplexing processing method used in the LTE system.

In the service multiplexing processing method,
eBM-SC allocates resources for multiplexed streams including MBMS service streams with different BLERs;
The eBM-SC notifies the MCE through the gateway of the resources allocated to the multiplexed stream,
After knowing the resource allocated to the multiplexed stream by the eBM-SC, the MCE maps the resource allocated to the multiplexed stream by the eBM-SC to the corresponding number of MBSFN subframes, and subframes of the MBSFN. Transmitting semi-static scheduling information including an index, an order of transmission of the MBMS service stream, an ID of each MBMS service stream, and a modulation and coding type adopted by each MBMS service stream to all eNBs under the MCE;
The eNB transmits the multiplexed stream based on the semi-static scheduling information, and notifies the MBMS user of dynamic scheduling information including information on a subframe in which the MBMS service stream is located.

  In the service multiplexing processing method, MBMS service streams having the same modulation and coding type are transmitted in the adjacent order.

  In the service multiplexing processing method, the eBM-SC notifies the MCE of a resource allocated to the multiplexed stream by a session start message.

In the service multiplexing processing method, the eBM-SC allocates resources to the multiplexed stream.
Obtaining transmission characteristics of a first service stream that is a service stream currently being multiplexed and transmitted having the first characteristics;
Calculating a variance σ ² of the first service stream based on transmission characteristics of the first service stream;
When the new service stream having the first feature joins, the variance σ ² is a service stream of multiplexed transmission formed after the new service stream is joined to the first service stream. Obtaining an expression representing the packet loss rate of the second service stream as the distribution of the second service stream;
Assigning resources to the new service stream based on an expression representing the packet loss rate.

In the service multiplexing processing method, the transmission characteristics of the first service stream include packet loss rate L _i of the first service stream, data rate average value μ of the first service stream, and the first service stream. It includes the link bandwidth C _i allocated to the stream, the buffer size B _i allocated to the first service stream, and the number i of sub-service streams in the first service stream.

In the service multiplexing processing method, the distribution of the first service stream is

  It is.

In the service multiplexing processing method, B _i is less than or equal to the product of C _i and D, which is the maximum queuing delay required for the first service stream.

In the service multiplexing processing method, an expression representing the packet loss rate of the second service stream is as follows.

C _{i + 1} : Link bandwidth allocated to the second service stream
B _{i + 1} : size of the buffer allocated to the second service stream
B _{i + 1} : Less than the product of C _{i + 1} and D μ: Average data rate of the second service stream.

  Embodiments of the present invention have the following beneficial effects.

In the method and apparatus of the embodiment of the present invention, first, based on the transmission characteristics of the service stream currently being multiplexed and transmitted having the first feature, the variance σ of the service stream currently being multiplexed and transmitted having the first feature ²⁾ , when a new service stream having the same characteristics joins, the calculated distribution is taken into account, taking into account the slowly changing characteristics of the transmission rate dispersion. And using this distribution, the packet loss rate of the service stream after the new service stream is subscribed is calculated, and further resource allocation or access control is performed. Therefore, it avoids the technical problem that the expression representing the packet loss rate cannot be acquired due to the fact that the complicated feature of the information source cannot be acquired in the prior art, and reduces the difficulty of realizing the multiplexing resource allocation or access control. .

  Also, it can be seen from a specific simulation that the method and apparatus according to the embodiment of the present invention can guarantee QoS and obtain a multiplexing gain even when the number of multiplexed streams is relatively large.

FIG. 1 is a diagram showing a flow of a method according to an embodiment of the present invention. FIG. 2 is a flowchart showing a detailed flow of a method according to an embodiment of the present invention. FIG. 3 is a diagram showing a simulation result by the method of the embodiment of the present invention. FIG. 4 is a diagram showing a simulation result by the method of the embodiment of the present invention.

In the above formula for obtaining the packet loss rate using the Brown Bridge method, if two variables of the data rate average value μ and the data rate variance σ ² of the service stream are obtained, the packet loss rate is used. Resource allocation and access control can be performed.

  In the case of a video stream, if the encoding method is defined, the average data rate of the stream can be acquired, but the data rate distribution of the service stream cannot be easily acquired. To avoid statistical variance, embodiments of the present invention propose a method for estimating variance by recording the current packet loss rate.

  As shown in FIG. 1, the method of the embodiment of the present invention includes the following steps.

In step 11, the transmission characteristics of the first service stream are obtained. The transmission characteristics of the first service stream include the first packet loss rate L _{i of} the first service stream, the average data rate μ of the service stream currently being multiplexed and transmitted, and the link assigned to the first service stream. It includes the bandwidth C _i and the size B _{i of} the buffer allocated to the first service stream. The first service stream is a service stream currently being multiplexed and transmitted having the first characteristic. i is the number of sub-service streams in the service stream currently being multiplexed and transmitted having the first characteristic.

The above B _i is not only related to the buffer size of the actual system, but also related to the service delay requirement. If the service requires that the queue delay is less than D _max , all packets that have timed out are discarded. in this case,

In step 12, based on the transmission characteristics of the first service stream, the variance σ ² of the first service stream is calculated as follows.

In step 13, when the new service stream having the first feature joins, considering the characteristic that the variation of the dispersion is gradual, the dispersion σ ² is directly used as described below. The second packet loss rate L _{i + 1} of the second service stream is acquired.

The second service stream is a multiplexed transmission service stream formed after the new service stream is subscribed. C _{i + 1} is the link bandwidth allocated to the second service stream, B _{i + 1} is the size of the buffer allocated to the second service stream,

Is established. Of course, during actual processing,

  Should be installed.

  Since the new service stream has the same characteristics as the service stream in the first service stream, the average value is the same.

In step 14, resource allocation or access control is performed based on _{Li + 1} .

  Hereinafter, resource allocation and access control will be described.

When allocating resources, the minimum C _{i + 1} that satisfies the following condition is calculated.

  Finding a solution to the above mathematical problem is not described in detail here because there is already a complete algorithm.

Regarding access control, it is to determine whether or not a new subscription service can be accepted under the restriction of the current bandwidth and buffer area while satisfying the packet loss rate requirement. That is, after setting C _{i + 1} in the above formula to the total link bandwidth C that can be provided by the system and B _{i + 1} to the total buffer area size B that can be provided by the system, it is determined whether or not the following condition is satisfied. to decide.

In fact, in the system, the size of the transfer facility buffer area is not already a bottleneck affecting system performance. B is mainly limited by the maximum queue delay. Therefore, the condition is changed to determining whether or not the following expression is satisfied.

  If established, it indicates that a new service stream can be accepted, and if not established, it indicates that a new service stream cannot be accepted.

  The method described above is applied when the average value is known and the variance is unknown.

When both the average value and the variance are unknown, the previous two packet loss rates, Li-1 and Li, may be recorded. Then, a data rate average value μ and a data rate variance σ ² are obtained from the following group of equations.

  Hereinafter, a more detailed flow in the case of allocating resources by the above method will be described.

  As shown in FIG. 2, the following steps are included.

  In step 21, it is determined whether or not there is a service stream subscription to be newly transmitted. If yes, enter step 22; if no, continue waiting.

  In step 22, it is determined whether there is a service stream currently being transmitted. If yes, enter step 25; if no, enter step 23.

  In step 23, resources are allocated to a single service stream according to conventional methods and step 24 is entered.

  In step 24, the packet loss rate at the time of transmission of a single service stream is stored, and the process returns to step 21.

In step 25, the previously recorded packet loss rate is obtained, and the variance σ ² is calculated based on the packet loss rate.

In step 26, the variance σ ² is a variance of a service stream (referred to as a second service stream) obtained after the service stream to be newly transmitted joins the current service stream, and the second service stream An expression representing the packet loss rate of is obtained.

  In step 27, resources are allocated to the second service stream based on an expression representing the packet loss rate.

  In step 28, the packet loss rate during transmission of the second service stream is recorded, and the process returns to step 21.

  The above specific flow also describes the case where the average value is known. When the average value is unknown, when subscribing to the first and second service streams, both allocate resources to a single service stream and record the packet loss rate according to the conventional method. When the service stream is subscribed to, the variance and average can be calculated based on the two packet loss rates recorded previously (there are two unknowns and two equations, so the solution can be found) Then, the packet loss rate is acquired, and further resource allocation or access control is performed. After acquiring the distribution, the resource allocation and access control of the service stream to be subscribed after that become a circular flow, and will not be described here.

  The method of the embodiment of the present invention is executed in an entity that performs resource allocation or access control. For example, in an MBMS system (Multimedia Broadcast Multicast System), the entity may be an MCE (Multi-cell / multicast Coordination Entity) or a BMSC (Broadcast-Multicast Service Center). In WLAN, the entity may be an AP. In the Internet, the entity may be a router.

  It should be noted that there are a plurality of means for obtaining the current packet loss rate as follows.

  The entity records itself. Since the resource of the service stream to which the entity has subscribed is also known, the packet loss situation can be recorded.

  Another entity records and then transmits to that entity. This applies when the resource allocation entity and the true packet transmission entity are separated. For example, in the MBMS system, the resource allocation entity is MCE, while the true packet transmission entity is e-NodeB. In this case, it is necessary to record the packet loss situation at the e-NodeB and then feed back to the MCE.

In order to show the effect of the Example of this invention, the simulation was performed. The simulation parameters are as shown in the table below.

Based on the simulation conditions, packet loss rates by different resource allocation methods are compared below. Here, it is assumed that the QoS request for the video stream has a maximum queue delay of 320 ms and a packet loss rate of less than 10 ⁻³ . Packet loss is mainly due to excessively long queue delays.

  As shown in FIG. 3, the abscissa is the number of multiplexed streams, and the ordinate is the packet loss rate. In addition to the video stream model construction method in the ON-OFF model, other methods can basically satisfy the packet loss rate requirement. However, when the number of multiplexed streams is relatively large, both the Markov model construction and the Brownbridge approximation exceed a predetermined packet loss rate. On the other hand, if the method of the embodiment of the present invention is used (corresponding to the black circle graph in FIG. 3), the packet loss rate requirement can still be satisfied.

  Based on the above simulation conditions, the multiplexing gains by different resource allocation methods are compared below. As shown in FIG. 4, the abscissa is the number of multiplexed streams, and the ordinate is the multiplexing gain. The multiplexing gain is defined as follows.

(GBR × N−ABBR) / GBR × N
N indicates the number of multiplexed streams, and GBR indicates resources allocated to a single service stream while satisfying the QoS requirement. ABBR (Aggregated Bundle Bit Rate) is a resource bundle assigned to a multiplexed stream while satisfying the same QoS requirement.

  As shown in FIG. 4, when the number of multiplexed streams is relatively large, if the method of the embodiment of the present invention is used (corresponding to the top graph of FIG. 4), very clear multiplexing is possible. Gain gain.

  An embodiment of the present invention provides a statistical multiplexing method applied to an LTE (Long Term Evolution) system.

  The eBM-SC allocates resources for multiplexed streams including MBMS service streams with different BLERs.

  The eBM-SC notifies the MCE via the gateway of the resources allocated to the multiplexed stream.

  After the MCE knows the resources allocated to the multiplexed stream by the eBM-SC, the MCE maps the resources allocated to the multiplexed stream to the corresponding number of MBSFN (Multicast / Broadcast Single Frequency Network) subframes. Then, semi-static scheduling information including the MBSFN subframe index, the MBMS service stream transmission order, the ID of each MBMS service stream, and the modulation and coding type to be used is transmitted to all eNBs under the MCE.

  The semi-static scheduling information includes the number of MBSFN subframes required for all MBMS service streams, the transmission order of these service streams, and the modulation and coding type. The modulation coding type is determined by the MBMS service stream block error rate BLER request. The transmission order of service streams must consider the modulation and coding type, and MBMS service streams with the same modulation and coding type should be transmitted in the adjacent order.

  When the eNB receives the semi-static scheduling information, the eNB transmits an MBMS service stream to the MBMS user and notifies the MBMS user of the dynamic scheduling information. The dynamic scheduling information includes information on a subframe in which the MBMS service is located, and enables the user to receive MBMS service data from the corresponding subframe.

  Since the semi-static scheduling information is specified, and the relevant criteria already specify in detail how the eNB sends the MBMS service stream to the MBMS user and notifies the MBMS user of the dynamic scheduling information, It will not be described in detail here.

  As described above, it is necessary to notify the MCE via the gateway of the resources allocated to the multiplexed stream by the eBM-SC. In the embodiment of the present invention, the resource allocated to the multiplexed stream by the eBM-SC is indicated by ABBR (Aggregated Bundle Bit Rate), and the process of notifying the MCE by the session start message of the resource allocated to the multiplexed stream is as follows. It is as follows.

  If the transmission of the service stream 1 is started, the eBM-SC transmits a session start message as described below.

Session Start (TMGI = 1, ABBR = 300kbps)
TMGI (Temporary Mobile Group Identity) is an ID that identifies an MBMS service stream.

  Thereafter, transmission of the service stream 2 starts, and the eBM-SC transmits a session start message as described below.

Session Start (TMGI = 1, TMGI = 2, ABBR = 400kbps)
......
Thereafter, transmission of the service stream n starts, and the eBM-SC transmits a session start message as described below.

Session Start (TMGI = 1, TMGI = 2,…, TMGI = n, ABBR = 4000kbps)
Through the session start message, the MCE can acquire the resources allocated by the eBM-SC to the multiplexed stream and execute the subsequent flow.

  In the prior art, all MBMS service streams included in one multiplexed stream may have the same BLER (refer to R3-091300 ABBR based statistical multiplexing solution for eMBMS and R3-091301 Service multiplexing and signaling for eMBMS) Although necessary, the prior art technical plan has the following shortages.

  Since all MBMS service streams included in one multiplexed stream have the same BLER, service streams having different BLER cannot be multiplexed and transmitted. Multiplexing can provide multiplexing gain, but if the number of service streams to be transmitted is constant, the number of service streams in each multiplexed stream is less than the number of service streams to be transmitted. The multiplexing gain cannot be maximized by the prior art method.

  On the other hand, if the method of the embodiment of the present invention is used, service streams having different BLER can be multiplexed and transmitted, and the number of service streams in the multiplexed stream can be equal to the number of service streams to be transmitted. The greater the number of service streams in the multiplexed stream, the greater the resulting multiplexing gain. Therefore, compared with the prior art, the multiplexing gain can be maximized by the method of the embodiment of the present invention.

  The above is only a preferred implementation mode of the present invention. For general engineers in the field, some modifications and modifications are possible on the premise that the principle of the present invention is not deviated. However, it will be understood that these modifications and modifications are also within the protection scope of the present invention.

Claims (19)

In the service multiplexing processing method,
Obtaining a transmission characteristic of a first service stream that is a service stream currently being multiplexed and transmitted having the first characteristic;
Calculating a variance σ ² of the first service stream based on transmission characteristics of the first service stream;
When a new service stream having the first feature is subscribed, the variance σ ² is a multiplexed transmission service stream formed after the new service stream is subscribed to the first service stream. As a distribution of the second service stream, an expression representing a packet loss rate of the second service stream is acquired,
A service multiplexing processing method, comprising: allocating resources or controlling access to the new service stream based on an expression representing the packet loss rate. The transmission characteristics of the first service stream include a packet loss rate L _i of the first service stream, an average data rate μ of the first service stream, and a link bandwidth C allocated to the first service stream. _2. The service multiplexing processing method according to claim 1, comprising _i , a buffer size B _i allocated to the first service stream, and a number i of sub-service streams in the first service stream. The distribution of the first service stream is

The service multiplexing processing method according to claim 2, wherein: 4. The service multiplexing process according to claim 2, wherein B _i is equal to or less than a product of C _i and D, which is a maximum queuing delay required for the first service stream. Method. 3. The service multiplexing processing method according to claim 2, wherein an expression representing a packet loss rate of the second service stream is as follows.

C _{i + 1} : Link bandwidth allocated to the second service stream
B _{i + 1} : size of the buffer allocated to the second service stream
B _{i + 1} : Less than the product of C _{i + 1} and D μ: Data rate average value of the second service stream.   The service multiplex processing method according to any one of claims 1 to 3, wherein the average data rate is specified by an encoding method. In the service multiplexing processing device,
A feature acquisition module for acquiring a transmission characteristic of a first service stream that is a service stream currently being multiplexed and transmitted having the first characteristic;
A variance calculation module that calculates a variance σ ² of the first service stream based on transmission characteristics of the first service stream;
When a new service stream having the first feature is subscribed, the variance σ ² is a multiplexed transmission service stream formed after the new service stream is subscribed to the first service stream. A packet loss rate acquisition module that acquires an expression representing a packet loss rate of the second service stream as the distribution of the second service stream;
And a service processing module for allocating resources or controlling access to the new service stream based on an expression representing the packet loss rate. The transmission characteristics of the first service stream include a packet loss rate L _i of the first service stream, an average data rate μ of the first service stream, and a link bandwidth C allocated to the first service stream. _i, size B _i of the buffer assigned to the first service stream, and service multiplexing apparatus according to claim 7, characterized in that it comprises a number i of the sub-service stream in the first service stream. The distribution of the first service stream is

The service multiplexing processing apparatus according to claim 8, wherein: 10. The service multiplexing process according to claim 8 or 9, wherein B _i is equal to or less than the product of C _i and D, which is a maximum queuing delay required for the first service stream. apparatus. 9. The service multiplexing processing apparatus according to claim 8, wherein an expression representing a packet loss rate of the second service stream is as follows.

C _{i + 1} : Link bandwidth allocated to the second service stream
B _{i + 1} : size of the buffer allocated to the second service stream
B _{i + 1} : Less than the product of C _{i + 1} and D μ: Data rate average value of the second service stream.   10. The service multiplexing processing apparatus according to claim 7, wherein the data rate average value is specified by an encoding method. In the service multiplexing processing method used in the LTE system,
eBM-SC allocates resources for multiplexed streams including MBMS service streams with different BLERs;
The eBM-SC notifies the MCE through the gateway of resources allocated to the multiplexed stream,
After knowing the resource allocated to the multiplexed stream by the eBM-SC, the MCE maps the resource allocated to the multiplexed stream by the eBM-SC to the corresponding number of MBSFN subframes, and subframes of the MBSFN. Transmitting semi-static scheduling information including an index, an order of transmission of the MBMS service stream, an ID of each MBMS service stream, and a modulation and coding type adopted by each MBMS service stream to all eNBs under the MCE;
eNB performs transmission of the multiplexed stream based on semi-static scheduling information, and notifies the MBMS user of dynamic scheduling information including information of a subframe in which the MBMS service stream is located ,
The eBM-SC allocates resources for the multiplexed stream.
Obtaining transmission characteristics of a first service stream that is a service stream currently being multiplexed and transmitted having the first characteristics;
Calculating a variance σ ² of the first service stream based on transmission characteristics of the first service stream ;
When a new service stream having the first feature is subscribed, the variance σ ² is a multiplexed transmission service stream formed after the new service stream is subscribed to the first service stream. Obtaining a formula representing a packet loss rate of the second service stream as a distribution of the second service stream;
Allocating resources to the new service stream based on an expression representing the packet loss rate . In the service multiplexing processing method used in the LTE system,
  eBM-SC allocates resources for multiplexed streams including MBMS service streams with different BLERs;
  The eBM-SC notifies the MCE through the gateway of resources allocated to the multiplexed stream,
  After knowing the resource allocated to the multiplexed stream by the eBM-SC, the MCE maps the resource allocated to the multiplexed stream by the eBM-SC to the corresponding number of MBSFN subframes, and subframes of the MBSFN. Transmitting semi-static scheduling information including an index, an order of transmission of the MBMS service stream, an ID of each MBMS service stream, and a modulation and coding type adopted by each MBMS service stream to all eNBs under the MCE;
  eNB performs transmission of the multiplexed stream based on semi-static scheduling information, and notifies the MBMS user of dynamic scheduling information including information of a subframe in which the MBMS service stream is located,
  MBMS service streams with the same modulation and coding type are transmitted in adjacent order,
  The eBM-SC allocates resources for the multiplexed stream.
  Obtaining transmission characteristics of a first service stream that is a service stream currently being multiplexed and transmitted having the first characteristics;
  Based on the transmission characteristics of the first service stream, the variance σ of the first service stream ² A step of calculating
  When a new service stream having the first feature subscribes, the variance σ ² Represents the packet loss rate of the second service stream as a variance of the second service stream, which is a multiplexed transmission service stream formed after the new service stream is subscribed to the first service stream. Obtaining an expression;
  Allocating resources to the new service stream based on an expression representing the packet loss rate.     In the service multiplexing processing method used in the LTE system,
  eBM-SC allocates resources for multiplexed streams including MBMS service streams with different BLERs;
  The eBM-SC notifies the MCE through the gateway of resources allocated to the multiplexed stream,
  After knowing the resource allocated to the multiplexed stream by the eBM-SC, the MCE maps the resource allocated to the multiplexed stream by the eBM-SC to the corresponding number of MBSFN subframes, and subframes of the MBSFN. Transmitting semi-static scheduling information including an index, an order of transmission of the MBMS service stream, an ID of each MBMS service stream, and a modulation and coding type adopted by each MBMS service stream to all eNBs under the MCE;
  eNB performs transmission of the multiplexed stream based on semi-static scheduling information, and notifies the MBMS user of dynamic scheduling information including information of a subframe in which the MBMS service stream is located,
  The eBM-SC notifies the MCE of the resources allocated to the multiplexed stream by a session start message,
  The eBM-SC allocates resources for the multiplexed stream.
  Obtaining transmission characteristics of a first service stream that is a service stream currently being multiplexed and transmitted having the first characteristics;
  Based on the transmission characteristics of the first service stream, the variance σ of the first service stream ² A step of calculating
  When a new service stream having the first feature subscribes, the variance σ ² Represents the packet loss rate of the second service stream as a variance of the second service stream, which is a multiplexed transmission service stream formed after the new service stream is subscribed to the first service stream. Obtaining an expression;
  Allocating resources to the new service stream based on an expression representing the packet loss rate. The transmission characteristics of the first service stream include a packet loss rate L _i of the first service stream, an average data rate μ of the first service stream, and a link bandwidth C allocated to the first service stream. _i, size B _i of the buffer assigned to the first service stream, and according to any one of claims 1 3 to 15, characterized in that it comprises a number i of the sub-service stream in the first service stream Service multiplexing processing method. The distribution of the first service stream is

The service multiplexing processing method according to claim 16 , wherein: The service multiplexing processing method according to claim 17 , wherein B _i is equal to or less than a product of C _i and D, which is a maximum queuing delay required for the first service stream. . 19. The service multiplexing processing method according to claim 18 , wherein an expression representing a packet loss rate of the second service stream is as follows.

C _{i + 1} : Link bandwidth allocated to the second service stream
B _{i + 1} : size of the buffer allocated to the second service stream
B _{i + 1} : Less than the product of C _{i + 1} and D μ: Data rate average value of the second service stream.

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