CN102026301B - Data distribution method and system for delay-sensitive forward quality of service (Qos) service - Google Patents
Data distribution method and system for delay-sensitive forward quality of service (Qos) service Download PDFInfo
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Abstract
The invention discloses a data distribution method for a delay-sensitive forward quality of service (Qos) service. The method comprises the following steps that: a base station controller establishes a bearing carrier which is accordant with the quantity of carrier frequencies for a terminal according to carrier frequency information reported by the terminal; and when the delay-sensitive forward Qos service exists in a data service applied by the terminal, the base station controller distributes all data of the delay-sensitive forward Qos service to the same bearing carrier and transmits the data to the terminal. The invention also discloses a data distribution system for the delay-sensitive forward Qos service. Due to the adoption of the method and the system, the instantaneity of the delay-sensitive forward Qos service can be enhanced and user experience can be improved.
Description
Technical Field
The present invention relates to data distribution technologies, and in particular, to a method and a system for distributing data of a delay-sensitive forward quality of service (QoS) service.
Background
In a wireless communication system based on code division multiple access high-speed packet data evolution data optimized version B (CDMA HRPD EVDORevB), when a terminal applies for a forward QoS service, data of the forward QoS service is distributed to each carrier by a base station controller to be sent. The QoS flow, i.e. a data byte stream carrying QoS services, is mainly classified into three major types of services, i.e. delay-sensitive type, throughput-sensitive type and best-effort delivery type, according to four indexes, i.e. maximum transmission delay, maximum delay jitter, minimum throughput and maximum packet loss rate. The delay-sensitive service is a data service which has strict requirements on the maximum transmission delay (generally, the maximum transmission delay is allowed to be between 200 and 600 milliseconds), and has no strict requirements on other three indexes; the throughput sensitive service is a data service which has certain requirements on the maximum delay jitter and the minimum throughput and has no strict requirements on other two indexes; the best effort delivery type service is a data service having a strict requirement on the maximum packet loss rate and no strict requirement on the other three indexes.
At present, in a multi-carrier system, when a terminal supporting a multi-carrier function starts to communicate with a base station, a base station controller establishes a plurality of carrier waves for the terminal, and according to a forward QoS service applied by the terminal to the base station controller, the base station controller allocates data of the forward QoS service to each carrier wave to send to the terminal; after receiving the data transmitted by each carrier, the terminal combines the data into a complete forward QoS service data packet at the bottom layer and submits the data to the upper layer. In view of the current implementation, there are two main ways in which the base station controller allocates data to be transmitted to each bearer carrier: one is to distribute the data of the forward QoS service to each carrier evenly; and the other is to allocate the flow control window size (i.e. the sending capacity of each carrier) in proportion according to the application of each carrier. For best effort or throughput sensitive services such as File Transfer Protocol (FTP), Web browsing, video playing, the two allocation methods can enable the terminal to obtain higher throughput on one hand and enable the base station throughput to reach a higher level on the other hand. However, for delay-sensitive services, especially services with low speed and high real-time requirement, because data of the forward QoS service passes through different bearer carriers, the time for the data to reach the terminal cannot be aligned absolutely according to the original data byte stream sequence, so a certain buffer area is generally required to be opened up at the terminal for buffering the data sent by the bearer carriers, and after all the data of a complete forward QoS service data packet arrives, the terminal combines the buffered data into a complete forward QoS service data packet according to the original data byte stream sequence, and then submits the complete forward QoS service data packet to an upper layer. As can be seen from the above description, a certain delay occurs in order to wait for all data to arrive. If some delay sensitive services have very high requirements on real-time performance, sometimes the buffer does not wait for all data of a complete forward QoS service data packet to arrive, the bottom layer must submit the data packet to the upper layer according to a strict time requirement, so that the forward QoS service data packet cannot be successfully packaged, the integrity of the data service is affected, and the experience of a user using the delay sensitive service is affected.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide a method and a system for allocating data of a delay-sensitive forward QoS service, which can improve the real-time performance of the delay-sensitive forward QoS service and improve the user experience.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a data distribution method of a delay sensitive forward QoS service comprises the following steps:
according to the carrier frequency information reported by the terminal, the base station controller establishes carrier waves with the same number as the carrier frequencies for the terminal;
when the data service applied by the terminal has the delay sensitive forward QoS service, the base station controller distributes all the data of the delay sensitive forward QoS service to the same carrier wave and sends the data to the terminal.
When there is a non-delay sensitive forward QoS service in the data service applied by the terminal, the method further includes:
the base station controller distributes the data of the non-delay sensitive forward QoS service to a carrier wave of the data of the non-carrier delay sensitive forward QoS service and sends the data to the terminal.
When the data service applied by the terminal does not have the delay sensitive forward QoS service but only has the non-delay sensitive forward QoS service, the method further includes:
the base station controller distributes the data of the non-delay sensitive forward QoS service to each bearing carrier and sends the data to the terminal.
And the carrier for bearing all the data of the delay sensitive forward QoS service is the carrier with the minimum load.
Alternatively, the bearer carrying all data of the delay-sensitive forward QoS service is the bearer with the largest reverse channel discard level field value.
A data distribution system of delay sensitive forward QoS business, the system includes terminal and base station controller which report the carrier frequency information; wherein,
the base station controller is used for establishing carrier waves with the same number as the carrier frequencies for the terminal according to the carrier frequency information reported by the terminal; and when the data service applied by the terminal has the delay sensitive forward QoS service, all the data of the delay sensitive forward QoS service is distributed to the same carrier wave and sent to the terminal.
Wherein the base station controller is further configured to:
when the data service applied by the terminal also has the non-delay sensitive forward QoS service, the data of the non-delay sensitive forward QoS service is distributed to the carrier wave of the data of the non-carrier delay sensitive forward QoS service and is sent to the terminal.
Wherein the base station controller is further configured to:
when the data service applied by the terminal does not have the time delay sensitive forward QoS service but only has the non-time delay sensitive forward QoS service, the data of the non-time delay sensitive forward QoS service is distributed to each carrier wave and is sent to the terminal.
And the carrier for bearing all the data of the delay sensitive forward QoS service is the carrier with the minimum load.
Alternatively, the bearer carrying all data of the delay-sensitive forward QoS service is the bearer with the largest reverse channel discard level field value.
It can be seen from the above technical solutions that, in the present invention, all data of the delay-sensitive forward QoS service are allocated to the same carrier for transmission, and a terminal can receive all data of all delay-sensitive forward QoS services on one carrier, so that the time for the terminal to wait for data sent from multiple carriers can be eliminated, and thus the received data can be quickly combined into a complete forward QoS service data packet, which can reduce the delay submitted to an upper layer, and finally improve the real-time performance of such delay-sensitive forward QoS service and improve the user experience.
Drawings
Fig. 1 is a schematic flow chart of a data distribution method of a delay-sensitive forward QoS service according to the present invention;
fig. 2 is a schematic structural diagram of a data distribution system of the delay-sensitive forward QoS service according to the present invention.
Detailed Description
The basic idea of the invention is: all data of the delay sensitive forward QoS service are distributed to the same carrier wave to be sent, so that the real-time performance of the delay sensitive forward QoS service is improved.
As shown in fig. 1, the data distribution method of the delay-sensitive forward QoS service of the present invention includes the following steps:
step 101, according to the carrier frequency information reported by the terminal, the base station controller establishes the carrier carriers with the same number as the carrier frequencies for the terminal according to the multi-carrier establishing mode commonly used in the industry.
The terminal of the invention is a terminal supporting a multi-carrier function.
The carrier waves consistent with the number of carrier frequencies refer to: if three carrier frequencies are indicated in the reported carrier frequency information, three carrier carriers corresponding to the three carrier frequencies are established.
102, according to the data service type applied by the terminal, the base station controller judges whether a delay sensitive forward QoS service exists, if yes, the step 103 is executed; otherwise, step 104 is performed.
And 103, the base station controller distributes all data of the delay sensitive forward QoS service to the same carrier wave and sends the data to the terminal.
According to the practical application situation, there are many selection modes for the carrier wave carrying all the data of the delay sensitive forward QoS service. As will be exemplified below.
In addition, in addition to the delay-sensitive forward QoS service, if a non-delay-sensitive forward QoS service exists in the data service applied by the terminal, the base station controller allocates the data of the non-delay-sensitive forward QoS service to a carrier of the data of the non-carrier delay-sensitive forward QoS service, and sends the data to the terminal.
In the present invention, data services except the delay sensitive forward QoS service are collectively referred to as a non-delay sensitive forward QoS service, and the non-delay sensitive forward QoS service may be: throughput sensitive forward QoS traffic, or best effort forward QoS traffic, or a combination of both.
The data of the non-delay sensitive forward QoS service is distributed according to a distribution method commonly used in the industry, that is, an average distribution method or a proportional distribution method.
The general process of sending data by the bearer carrier is as follows: the base station controller sends the data to an Abis link on a carrier, then sends the data to a modulation unit on the carrier through the Abis link, and the modulation unit modulates the data and then sends the data to the terminal. This is prior art and will not be described in detail.
And step 104, when the data service applied by the terminal does not have the delay sensitive forward QoS service but only has the non-delay sensitive forward QoS service, the base station controller distributes the data of the non-delay sensitive forward QoS service to each carrier and sends the data to the terminal.
The data distribution mode may be an average distribution mode or a proportional distribution mode.
The technical solution of the present invention is further described in detail by two specific examples below.
Example one
In this embodiment, the bearer with the smallest load is selected to transmit the data of the delay-sensitive forward QoS service.
Step 201, according to the carrier frequency information reported by the terminal, the base station controller establishes a carrier frequency consistent with the carrier frequency number for the terminal.
Step 202, according to the data service type applied by the terminal, the base station controller judges whether there is a delay sensitive forward QoS service, if yes, step 203 is executed; otherwise, step 204 is performed.
Step 203, according to the load condition of each carrier, the base station controller distributes all data of the delay sensitive forward QoS service to the carrier with the minimum load, and sends the data to the terminal; and distributing the data of the non-delay sensitive forward QoS service to a carrier of the data of the non-carrier delay sensitive forward QoS service, and sending the data to the terminal.
Step 204, the base station controller distributes the data of the non-delay sensitive forward QoS service to each carrier and sends the data to the terminal.
Example two
In this embodiment, the bearer with the largest reverse channel drop class (retrochannelinddroppingrank) field value is selected to send the data of the delay-sensitive forward QoS service. The larger the ReverseChannelDroppingRank field value, the lower the representation priority, meaning that the reverse channel is less likely to be dropped, so that the data on the corresponding bearer carrier is also less likely to be dropped.
Step 301, according to the carrier frequency information reported by the terminal, the base station controller establishes carrier carriers with the same number as the carrier frequencies for the terminal.
Here, it should be noted that: the base station controller also negotiates with the terminal to determine the field value of the revertChannelDroppingRank of each bearing carrier in the process of establishing the bearing carrier for the terminal.
Step 302, according to the data service type applied by the terminal, the base station controller judges whether a delay sensitive forward QoS service exists, if yes, step 303 is executed; otherwise, step 304 is performed.
Step 303, the base station controller sends all data of the delay sensitive forward QoS service to the carrier with the largest field value of the revertChannelDroppingRank, and sends the carrier to the terminal; and distributing the data of the non-delay sensitive forward QoS service to a carrier of the data of the non-carrier delay sensitive forward QoS service, and sending the data to the terminal.
For example, there are first, second, and third bearer carriers, where the field value of the second bearer carrier is the largest, all data of the delay-sensitive forward QoS traffic is allocated to the second bearer carrier for transmission, and data of other non-delay-sensitive forward QoS traffic is allocated to the first and third bearer carriers for transmission.
Step 304, the base station controller distributes the data of the non-delay sensitive forward QoS service to each carrier wave and sends the data to the terminal.
In order to implement the above method, the present invention correspondingly provides a data distribution system of a delay-sensitive forward QoS service, as shown in fig. 2, the system includes a terminal 10 and a base station controller 20, which report carrier frequency information; wherein,
a base station controller 20, configured to establish carrier waves with the same number as the carrier frequencies for the terminal 10 according to the carrier frequency information reported by the terminal 10; and is configured to, when there is a delay-sensitive forward QoS service in the data service applied by the terminal 10, allocate all data of the delay-sensitive forward QoS service to the same carrier, and send the data to the terminal 10.
Further, the base station controller 20 is further configured to:
when there is a non-delay sensitive forward QoS service in the data service applied by the terminal, the data of the non-delay sensitive forward QoS service is allocated to the carrier of the data of the non-bearer delay sensitive forward QoS service, and is sent to the terminal 10.
Further, the base station controller 20 is further configured to:
when there is no delay-sensitive forward QoS service but only non-delay-sensitive forward QoS service in the data service applied by the terminal 10, the data of the non-delay-sensitive forward QoS service is allocated to each carrier and sent to the terminal 10.
Wherein, the carrier for bearing all data of the time delay sensitive forward QoS service is the carrier with the minimum load.
Or, the carrier carrying all the data of the delay sensitive forward QoS service is the carrier with the largest reverse channel discard level field value.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (10)
1. A data distribution method of a time delay sensitive forward QoS service is characterized by comprising the following steps:
according to the carrier frequency information reported by the terminal, the base station controller establishes carrier waves with the same number as the carrier frequencies for the terminal; the terminal is a terminal supporting a multi-carrier function;
when the data service applied by the terminal has the delay sensitive forward QoS service, the base station controller distributes all the data of the delay sensitive forward QoS service to the same carrier wave and sends the data to the terminal.
2. The data distribution method of the delay sensitive forward QoS service according to claim 1, wherein when there is a non-delay sensitive forward QoS service in the data service applied by the terminal, the method further comprises:
the base station controller distributes the data of the non-delay sensitive forward QoS service to a carrier wave of the data of the non-carrier delay sensitive forward QoS service and sends the data to the terminal.
3. The data distribution method of the delay sensitive forward QoS service according to claim 1, wherein when the data service requested by the terminal does not include the delay sensitive forward QoS service but only includes the non-delay sensitive forward QoS service, the method further comprises:
the base station controller distributes the data of the non-delay sensitive forward QoS service to each bearing carrier and sends the data to the terminal.
4. The data distribution method of the delay sensitive forward QoS service according to claim 1, or 2, or 3, wherein the bearer carrying all data of the delay sensitive forward QoS service is the bearer with the smallest load.
5. The data distribution method of the delay sensitive forward QoS service as claimed in claim 1, or 2, or 3, wherein the bearer carrying all data of the delay sensitive forward QoS service is the bearer carrying the largest reverse channel discard level field value.
6. A data distribution system of time delay sensitive forward QoS business is characterized in that the system comprises a terminal and a base station controller for reporting carrier frequency information; wherein,
the base station controller is used for establishing carrier waves with the same number as the carrier frequencies for the terminal according to the carrier frequency information reported by the terminal; and when the data service applied by the terminal has a delay sensitive forward QoS service, all data of the delay sensitive forward QoS service are distributed to the same carrier wave and sent to the terminal, wherein the terminal is a terminal supporting a multi-carrier function.
7. The data distribution system of delay sensitive forward QoS traffic of claim 6, wherein said base station controller is further configured to:
when the data service applied by the terminal also has the non-delay sensitive forward QoS service, the data of the non-delay sensitive forward QoS service is distributed to the carrier wave of the data of the non-carrier delay sensitive forward QoS service and is sent to the terminal.
8. The data distribution system of delay sensitive forward QoS traffic of claim 6, wherein said base station controller is further configured to:
when the data service applied by the terminal does not have the time delay sensitive forward QoS service but only has the non-time delay sensitive forward QoS service, the data of the non-time delay sensitive forward QoS service is distributed to each carrier wave and is sent to the terminal.
9. The data distribution system of the delay sensitive forward QoS service according to claim 6, or 7, or 8, wherein the bearer carrying all data of the delay sensitive forward QoS service is the bearer with the least load.
10. The data distribution system of the delay sensitive forward QoS service as claimed in claim 6, 7 or 8, wherein the bearer carrying all data of the delay sensitive forward QoS service is the bearer with the largest reverse channel discard level field value.
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| CN101345996A (en) * | 2007-07-11 | 2009-01-14 | 中兴通讯股份有限公司 | Carrier wave resource allocation method of real-time service |
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