CN100433862C - Method for implementing difference service on high speed physical downlink shared channel - Google Patents
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Abstract
The present invention relates to a method for realizing differentiation service on a high-speed physical downlink shared channel, which mainly comprises: a base station counts the actual data reception error probability of a sending service in the process that data is sent to a user by the determined size of data blocks through the HS-PDSCH (high-speed physical downlink shared channel; the base station adjusts the size of the subsequent data blocks sending the services to the user according to the target data reception error probability corresponding to the service and the actual reception error probability. The method of the present invention can provide services embodying differentiation for different users and services carrying out data transmission by using the HSPDSCH channel, and the satisfaction degree of the users is enhanced.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of method that on high-speed physical downlink shared channel (HS-PDSCH), realizes differentiated service.
Background technology
3GPP (third generation partner program) is a consortium of being made up of the telecommunication standard department from China, Japan, Korea S, US and European.Comprise the whole world more than 200 tame wireless manufacturer and operators, 3GPP will formulate most 3G (3G (Third Generation) Moblie) technical stipulation.China Wireless Telecommunication Standar group (CWTS) has added 3GPP in 1999.The target of 3GPP is to realize being seamlessly transitted to 3G network by 2G (second generation mobile communication) network, guarantees the backwards compatibility of WeiLai Technology, supports roaming and compatibility between light networking and system.
HSDPA (high speed downlink packet access) is a kind of modulation agreement that 3GPP proposes in order to satisfy the asymmetric demand of up-downgoing data service in WCDMA (Wideband Code Division Multiple Access (WCDMA)) R5, this agreement can be under the situation that does not change existing WCDMA network configuration, by Adaptive Modulation and AMC (coding), HARQ (mix and retransmit), and the series of key techniques such as fast dispatch of base station, realize descending high speed data transfer, downstream data traffic speed is brought up to 10Mbps.
In the WCDMA system, because the introducing of HSDPA, three kinds of channels have been increased, be respectively HS-SCCH (High-Speed Shared Control Channel) channel at the HS-PDSCH of down link transmitting data information (high-speed physical downlink shared channel (HS-PDSCH)) channel, transmission Downlink Control Information, and HS-DPCCH (High-Speed Dedicated Physical Control Channel) channel that on up link, transmits uplink feedback information.
Compare with DPCH (dedicated channel), HSDPA has very big advantage.Mainly be:
1, a plurality of users in the sub-district share all resources of HSDPA.The operable HS-PDSCH channel in sub-district can reach 15 at most.In HSDPA, system can reasonably dynamically give each user these HS-PDSCH channel allocation according to user's data transmission demand and the residing channel circumstance of user.Synchronization also can be distributed to a plurality of users to a HS-PDSCH channel according to certain ratio.By using certain dispatching algorithm, system can also distribute more HS-PDSCH channel for the good user of channel circumstance, so just can further improve the capacity of system.The distribution schematic diagram of HSDPA resource between a plurality of users as shown in Figure 1.
And for DPCH (dedicated channel), system is necessary for each user and distributes fixing resource, when certain user does not have transfer of data, distributes to this user's resource and can not be used by other user, thereby cause resource waste.Therefore, very suitable those transfer of data demands of HSDPA technology have sudden, and data transmission delay requires not have the high non-real-time services of session service such as voice call.
2, the adaptive modulation and coding function of HSDPA, make under the situation of using same channel code and power resource, the HSDPA channel can obtain the transfer of data of more speed than DPCH channel, has improved 100% even more the relative DPCH channel of the utilance of channel code and power resource.Solved the limited problem of downlink capacity effectively.
3, because HSDPA adopts HARQ (mix and retransmit) technology, directly the data of bust this are retransmitted in physical layer, retransmit with the RLC (Radio Link control) of DPCH channel layer and to compare, reduced the time delay that data re-transmission is brought widely, thereby provide higher service quality for the user.
User utilizes schematic diagram that HSDPA carries out transfer of data as shown in Figure 2 in the WCDMA system.
Referring to the air interface part among Fig. 2, use HSDPA to carry out the user of transfer of data for each, must set up a two-way DCH (dedicated channel) signaling channel simultaneously, a up HS-DPCCH channel, a descending HS-PDSCH channel, and a up DCH Traffic Channel.
Wherein, two-way DPCH signaling channel is used for interactive signaling message between transmission user and the network, and for example switching command, business are set up message and measured control etc.Descending HS-PDSCH channel is used for transmitting descending business datum.Up DCH Traffic Channel is used for transmitting up business datum or and the status report of downlink service data correspondence.
Up HS-DPCCH channel also is used for affirmation information to the base station feedback Data Receiving by the user.If the user has correctly received the data of base station to its transmission, then to base station feedback ACK (receive and reply).If the user does not have correctly to receive the data of base station to its transmission, then to base station feedback NACK (do not receive and reply).The user is in base station feedback ACK or NACK message, also to base station feedback CQI (channel quality indication) message.If user feedback NACK message, illustrate that then moment of front is not correctly received by this user from the data block that the HS-PDSCH channel sends, so the base station can send this data block to this user again at next delivery time, correctly received by the user and fed back ACK message up to this data block.
In the prior art scheme, the user by up HS-DPCCH channel to base station feedback CQI message, shown in following CQI mapping table (table 1): each CQI value is all corresponding specific transfer of data block size, HS-PDSCH channel yardage, modulation system, and the information such as transmitting power adjustment amount of reference.The base station is according to the CQI value of user feedback, determines next data block size that constantly can send, the channel yardage of use by searching the CQI mapping table when the user sends data, and information such as modulation system.And this CQI mapping table all is identical (comprising base station side and user side) in existing WCDMA system.When the base station is come when the user sends data according to the CQI mapping table, data block aloft takes place in the interface data, and to receive wrong probability be about 10% (because the differences of concrete channel circumstance, error probability is different, is identical but be in the error probability that the user under the same channel circumstance obtains).
Table 1:CQI mapping table
| The CQI value | The transfer of data block size | HS-PDSCH channel yardage | Modulation system | Reference transmit power is adjusted |
| 1 | 137 | 1 | QPSK | 0 |
| 2 | 173 | 1 | QPSK | 0 |
| 3 | 233 | 1 | QPSK | 0 |
| 4 | 317 | 1 | QPSK | 0 |
| 5 | 377 | 1 | QPSK | 0 |
| 6 | 461 | 1 | QPSK | 0 |
| 7 | 650 | 2 | QPSK | 0 |
| 8 | 792 | 2 | QPSK | 0 |
| 9 | 931 | 2 | QPSK | 0 |
| 10 | 1262 | 3 | QPSK | 0 |
| 11 | 1483 | 3 | QPSK | 0 |
| 12 | 1742 | 3 | QPSK | 0 |
| 13 | 2279 | 4 | QPSK | 0 |
| 14 | 2583 | 4 | QPSK | 0 |
| 15 | 3319 | 5 | QPSK | 0 |
| 16 | 3565 | 5 | 16-QAM | 0 |
| 17 | 4189 | 5 | 16-QAM | 0 |
| ... | ... | ... | ... | ... |
The shortcoming of described prior art scheme is: prior art is by using unified CQI mapping table, make the different business of different user when utilizing same HS-PDSCH channel to carry out transfer of data, obtain identical data block and received error probability, and the reception error probability of data block has determined message transmission rate and transfer of data institute's time spent (being propagation delay time) that the user obtains to a great extent, that is to say that the service quality that different user obtains is identical.And in fact, the business of different user request exists otherness, even and asked also to exist between the user of identical services the difference (for example flat rate system user, prepaid user and VIP (honored guest) user etc.) of priority.Therefore, the prior art scheme is used the user of same HS-PDSCH channel that identical data transmission performance is provided for all to be irrational, must to embody the otherness between user characteristics, the service attribute to a certain extent, the service of differentiation is provided for the user.
Summary of the invention
In view of above-mentioned existing in prior technology problem, the purpose of this invention is to provide a kind of method that on high-speed physical downlink shared channel (HS-PDSCH), realizes differentiated service, thereby the service that embodies differentiation can be provided for different user, the business of using the HS-PDSCH channel to carry out transfer of data, improve user's satisfaction.
The objective of the invention is to be achieved through the following technical solutions:
A kind of method that realizes differentiated service on high-speed physical downlink shared channel (HS-PDSCH) comprises:
A, base station send in the process of data to the user by high-speed physical downlink shared channel (HS-PDSCH) HS-PDSCH with the established data block size, and statistics sends professional real data and receives error probability;
B, base station are according to described user's the user characteristics and the service attribute of described business, receive the mapping table of corresponding relation between the error probability by inquiring user feature, service attribute and target data, know that described professional corresponding target data receives error probability, the base station receives error probability according to described target data and described real data receives error probability, adjusts the follow-up size that sends the data block of business to the user.
Described steps A specifically comprises:
A1, base station are arranged on to the user and send in the process of data, and the user is carried out the time period that real data receives the error probability statistics;
A2, base station are sending to the user in the process of data, and statistics all of user feedback in the time period of described setting are received the sum of replying ACK message and do not received the sum of replying NACK message;
The sum that A3, base station account for ACK message with the sum of NACK message adds that the real data that the ratio of the sum of NACK message is defined as customer service receives error probability.
Described base station determines that according to described user characteristics and service attribute the target data reception error probability of customer service correspondence specifically comprises:
B11, base station are provided with the mapping table that user characteristics, service attribute and target data receive error probability;
B12, base station determine that by searching described mapping table the target data of customer service receives error probability according to described user characteristics and service attribute.
Described base station receives error probability according to described target data and described real data receives error probability, adjusts the follow-up size that sends the data block of business to the user and specifically comprises:
If the described target data of B13 receives error probability and described real data reception error probability equates, then the base station determines to send to the user size of professional data block according to the channel quality indicator (CQI) value of user feedback by searching the CQI mapping table in the time period of the described setting of the next one.
Described base station receives error probability according to described target data and described real data receives error probability, adjusts the follow-up size that sends the data block of business to the user and specifically comprises:
If the described real data of B14 receives error probability and receives error probability greater than described target data, then the CQI value of user feedback is turned down in the base station;
B15, base station determine to send to the user size of professional data block according to the described CQI value of turning down by searching the CQI mapping table in the time period of the described setting of the next one.
Described base station receives error probability according to described target data and described real data receives error probability, adjusts the follow-up size that sends the data block of business to the user and specifically comprises:
If the described real data of B16 receives error probability and receives error probability less than described target data, then the CQI value of user feedback is heightened in the base station;
B17, base station determine to send to the user size of professional data block according to the described CQI value of heightening by searching the CQI mapping table in the time period of the described setting of the next one.
Described base station receives error probability according to described target data and described real data receives error probability, adjusts the follow-up size that sends the data block of business to the user and specifically comprises:
B18, base station obtain corresponding transfer of data block size TB according to the CQI value of user feedback by searching the CQI mapping table;
B19, base station are according to the described TB that obtains and described target data receives error probability Rt and described real data receives error probability R, determine the size of the data block that sends to customer service in the time period of the described setting of the next one, for: TB* (Rt/R).
As seen from the above technical solution provided by the invention, the present invention compares with prior art, has following advantage: by enforcement of the present invention, when network utilisation HS-PDSCH channel carries out transfer of data, keep clearly between service quality that the user obtains and user characteristics, the service attribute and corresponding relation flexibly, embodied the differentiation of service quality.Utilize the present invention, operator can provide the service of satisfying its corresponding demand for the user with different demands, improved user's satisfaction.For example can be for the user provide the Number for access with different user grade, and bundle different classes of services such as charging method.
Description of drawings
Fig. 1 is the distribution schematic diagram of HSDPA resource between a plurality of users;
Fig. 2 utilizes HSDPA to carry out the schematic diagram of transfer of data for user in the WCDMA system;
Fig. 3 is the concrete process chart of the method for the invention.
Embodiment
The invention provides a kind of method that on high-speed physical downlink shared channel (HS-PDSCH), realizes differentiated service.Core of the present invention is: send in the process of data to the user by the HS-PDSCH channel in the base station, the affirmation information of the reception data that the real-time statistics user feedback is returned, and the CQI value of user feedback is adjusted according to statistics, then according to adjusted CQI value, select corresponding transmission block size, channel yardage and modulation system to send data, the differentiated service that embodies user characteristics and service attribute is provided to the user to the user.
Describe the present invention in detail below in conjunction with accompanying drawing, the concrete handling process of the method for the invention as shown in Figure 3.Comprise the steps:
Step 3-1, user ask the business on the HSDPA channel.
At first, the user need be to business that is based upon on the HS-PDSCH channel of base station requests.
Step 3-2, base station obtain this user's user characteristics, service attribute.
The user to base station requests after business that is based upon on the HS-PDSCH channel, the base station just obtains this user's feature, and the information such as attribute of the business that this user asked, and in this professional communication process, all the time these information are kept in the base station.
Here, the definition of user characteristics and service attribute and value can have several different methods.For example, user characteristics can be defined as the rank of user in network, and value is gold, silver, copper; Service attribute can be defined as professional transmission quality requirements, and value is high, medium and low.
The simplest a kind of method that service attribute is defined with value is: directly utilize when business is set up, the Radio Link that Serving RNC (radio network controller) sends to the base station by Iub (between RNC and the base station) interface is set up or is revised user's distribution/dispatching priority information, type of service and the Business Processing precedence information that carries in the message, and service attribute is defined and value.
Step 3-3, base station determine that this professional target data receives error probability.
Obtained user's user characteristics, service attribute in the base station after, determine that just the target data of the business that the user is asked receives error probability.
The method of determining can realize that the substance of this mapping table can be as shown in table 2 by the mapping table that a user characteristics, service attribute and data transmission fault probability desired value are set.Data in the form of this mapping table and the table can be according to actual needs, and for example operator's requirement is adjusted.
Table 2: target error probability mapping table
| User gradation | Service priority | Target error probability (%) |
| 1 | 1 | 2 |
| 1 | 2 | 4 |
| 1 | 3 | 6 |
| 2 | 1 | 6 |
| 2 | 2 | 8 |
| 2 | 3 | 10 |
| 3 | 1 | 10 |
| 3 | 2 | 15 |
| 3 | 3 | 20 |
Step 3-4, base station send data and real-time statistics user to the data reception acknowledgement information of base station feedback to the user, calculate real data and receive error probability.
Is transmitting to the user in the process of data the base station, can obtain all ACK and the NACK message of user feedback.So the base station statistics is (this time period preestablishes and can adjust) in a nearest time period, the NACK sum and (ACK+NACK) the total ratio R of user feedback:
R=100%*NACK sum/(ACK sum+NACK sum).
Since the user correct receive transmission data block after feeding back ACK message, after mistake receives transmission data block feedback NACK message, thus R value reflected should business the real data reception error probability aloft transmitted in the interface of data.
Step 3-5, factual error probability and target error probability are compared.
The base station is that R value and pre-determined target data reception error probability compare with the real data reception error probability of the customer service of acquisition.
If real data receives error probability and receives error probability greater than target data, then execution in step 3-6;
If real data receives error probability and receives error probability less than target data, then execution in step 3-7;
If receiving error probability, real data equals target data reception error probability, then execution in step 3-4.
Step 3-6, turn down the CQI value of user feedback according to statistics.
If real data receives error probability and receives error probability greater than target data, then the CQI value of user feedback is turned down in the base station.Then according to CQI value after turning down and the CQI mapping table shown in the table 1, the size to the data block of user's transmission is determined in the time period in the base station.And continuation execution in step 3-4.
Concrete which type of method of adjustment that adopts does not influence application of the present invention, and the present invention also provides a kind of method of adjustment of more accurate and easy realization.
A, according to the CQI value of user feedback, the CQI mapping table shown in the look-up table 1 obtains corresponding transmission block size (TB);
B, acquisition target data receive the ratio (Rt/R) of the real data reception error probability of error probability and base station real-time statistics;
The interior data block size=TB* (Rt/R) that sends to the user of a time period is determined in C, base station.
Step 3-7, heighten the CQI value of user feedback according to statistics.
If real data receives error probability and receives error probability less than target data, then the CQI value of user feedback is heightened in the base station.Then according to CQI value after heightening and the CQI mapping table shown in the table 1, the size to the data block of user's transmission is determined in the time period in the base station.And continuation execution in step 3-4.
Concrete method of adjustment also can adopt the described method of adjustment of step 3-6.
The present invention also provides a specific embodiment, and is as follows:
A VIP user, corresponding user gradation is 1, and this user applies has been set up a business that surfs the web, and the service priority attribute is 3, and then according to the target error probability corresponding relation of table 2, the target error probability that obtains this user should be 6%.The base station is when this user sends data, the factual error probability that Realtime Statistics sends, the time period of statistics factual error probability is made as 100 milliseconds, adjust data block size according to the relation of target error probability and factual error probability then, equal target error probability (6%) up to the factual error probability to the actual transmission of this user.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (7)
1, a kind of method that realizes differentiated service on high-speed physical downlink shared channel (HS-PDSCH) is characterized in that, comprising:
A, base station send in the process of data to the user by high-speed physical downlink shared channel (HS-PDSCH) HS-PDSCH with the established data block size, and statistics sends professional real data and receives error probability;
B, base station are according to described user's the user characteristics and the service attribute of described business, receive the mapping table of corresponding relation between the error probability by inquiring user feature, service attribute and target data, know that described professional corresponding target data receives error probability, the base station receives error probability according to described target data and described real data receives error probability, adjusts the follow-up size that sends the data block of business to the user.
2, according to the described method that on high-speed physical downlink shared channel (HS-PDSCH), realizes differentiated service of claim 1, it is characterized in that described steps A specifically comprises:
A1, base station are arranged on to the user and send in the process of data, and the user is carried out the time period that real data receives the error probability statistics;
A2, base station are sending to the user in the process of data, and statistics all of user feedback in the time period of described setting are received the sum of replying ACK message and do not received the sum of replying NACK message;
The sum that A3, base station account for ACK message with the sum of NACK message adds that the real data that the ratio of the sum of NACK message is defined as customer service receives error probability.
According to the described method that on high-speed physical downlink shared channel (HS-PDSCH), realizes differentiated service of claim 1, it is characterized in that 3, described base station determines that according to described user characteristics and service attribute the target data reception error probability of customer service correspondence specifically comprises:
B11, base station are provided with the mapping table that user characteristics, service attribute and target data receive error probability;
B12, base station determine that by searching described mapping table the target data of customer service receives error probability according to described user characteristics and service attribute.
4, according to the described method that on high-speed physical downlink shared channel (HS-PDSCH), realizes differentiated service of claim 1, it is characterized in that, described base station receives error probability according to described target data and described real data receives error probability, adjusts the follow-up size that sends the data block of business to the user and specifically comprises:
If the described target data of B13 receives error probability and described real data reception error probability equates, then the base station determines to send to the user size of professional data block according to the channel quality indicator (CQI) value of user feedback by searching the CQI mapping table in the time period of the described setting of the next one.
5, according to the described method that on high-speed physical downlink shared channel (HS-PDSCH), realizes differentiated service of claim 1, it is characterized in that, described base station receives error probability according to described target data and described real data receives error probability, adjusts the follow-up size that sends the data block of business to the user and specifically comprises:
If the described real data of B14 receives error probability and receives error probability greater than described target data, then the CQI value of user feedback is turned down in the base station;
B15, base station determine to send to the user size of professional data block according to the described CQI value of turning down by searching the CQI mapping table in the time period of the described setting of the next one.
6, according to the described method that on high-speed physical downlink shared channel (HS-PDSCH), realizes differentiated service of claim 1, it is characterized in that, described base station receives error probability according to described target data and described real data receives error probability, adjusts the follow-up size that sends the data block of business to the user and specifically comprises:
If the described real data of B16 receives error probability and receives error probability less than described target data, then the CQI value of user feedback is heightened in the base station;
B17, base station determine to send to the user size of professional data block according to the described CQI value of heightening by searching the CQI mapping table in the time period of the described setting of the next one.
7, according to the described method that on high-speed physical downlink shared channel (HS-PDSCH), realizes differentiated service of claim 1, it is characterized in that, described base station receives error probability according to described target data and described real data receives error probability, adjusts the follow-up size that sends the data block of business to the user and specifically comprises:
B18, base station obtain corresponding transfer of data block size TB according to the CQI value of user feedback by searching the CQI mapping table;
B19, base station are according to the described TB that obtains and described target data receives error probability Rt and described real data receives error probability R, determine the size of the data block that sends to customer service in the time period of the described setting of the next one, for: TB* (Rt/R).
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