CN1972282A - System and method for providing multicarrier HSDPA backward compatibility - Google Patents
System and method for providing multicarrier HSDPA backward compatibility Download PDFInfo
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- CN1972282A CN1972282A CN 200510123918 CN200510123918A CN1972282A CN 1972282 A CN1972282 A CN 1972282A CN 200510123918 CN200510123918 CN 200510123918 CN 200510123918 A CN200510123918 A CN 200510123918A CN 1972282 A CN1972282 A CN 1972282A
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Abstract
This invention discloses one multi-wave HSPDA system to support back capacity method, which comprises the following steps: designing one expensive MAC-hs PDU structure for multiple load wave HSDPA system at interface of network; network determines which structure through terminal report HSDPA ability information and adopts the structure and terminal for down high speed data transmission. This invention can make HSDPA terminal overcomes the problem of transmission speed limit to the send window to ensure its design peak speed acquires.
Description
Technical field
The mobile communication system that the present invention relates to provide high speed downlink packet to insert (HSDPA) service relates in particular to and makes network and terminal support the method for backwards compatibility respectively in the multi-carrier HSDPA system simultaneously.
Background technology
One of 3-G (Generation Three mobile communication system) most important characteristic provides the comprehensive tenability to the high-speed mobile Packet data service, and these high-speed data services comprise video, Streaming Media and file download etc.Along with the growing demand of mobile communication subscriber to high-speed packet data service, simultaneously also be in order can to compete mutually the tenability that the data business improves constantly with other wireless technologys better, 3G (Third Generation) Moblie partner program tissue (3GPP) has been introduced the HSDPA technology at the Rel5 version.HSDPA is by adopting adaptive coding and modulating (AMC) and mixing (HARQ) technology that retransmits automatically, increase a high-speed downlink shared transmission channel (HS-DSCH), increase a MAC-hs entity in base station side, adopt the dispatching algorithm of optimizing to provide scheduling of resource fast for downstream data traffic at a high speed, higher user's peak rate of more early stage 3GPP version and cell data throughput can be obtained thus, thereby the investment of frequency spectrum resource and infrastructure device can be when satisfying high-speed packet data service, saved as much as possible for operator.
In present single carrier TD-SCDMA system, can make the hardware circuit solution of down direction rise to 2.8Mbps by introducing the HSDPA technology from 384kbps, the system of this support single carrier HSDPA technology has given definition in 3GPP Rel5 consensus standard, a kind of terminal that exists is the terminal by the support single carrier HSDPA technology of 3GPP Rel5 consensus standard exploitation like this, at present.Yet compare with one of main competition technology WCDMA, because WCDMA has adopted Frequency Division Duplexing (FDD) (FDD) mode, thereby monopolizing the spectral bandwidth of 5MHz, down direction make its theoretical peak speed reach 14.4MHz, therefore, although TD-SCDMA system itself only takies the spectral bandwidth of 1.6MHz and has quite high spectrum efficiency, yet the peak rate index of unique user does not have advantage comparatively speaking.For further promoting the ability of TD-SCDMA systems support high speed data service, strengthen the TD-SCDMA competitive advantage, HSDPA can be combined with multicarrier, improve the hardware circuit solution of HSDPA by multi-transceiver technology, this technical scheme is supported at the follow-up evolution version of consensus standard, for convenience of description, the present invention is referred to as to support the version of multi-carrier HSDPA.For example, when the TD-SCDMA system adopted 16QAM modulation, three carrier waves of use, theoretical peak speed can reach 8.4Mbps, and the TS0 time slot also will be used to transmit data after distributing through resource optimization on the carrier wave if further will assist, hardware circuit solution will be further enhanced, and can reach about 10Mbps.
Yet, although by multi-transceiver technology being incorporated into the hardware circuit solution that can improve unique user in the TD-SCDMA system theoretically, but provide enough support giving full play to the flexibility that its scheduling of resource is used in existing technology, can not for the multi-carrier HSDPA network, thereby influence the performance of its performance.This defective mainly is reflected on MAC-hs protocol Data Unit (PDU) structure by 3GPP Rel5 version definition that current MAC-hs entity adopted when the transmitting high speed down grouped data.At present the MAC-hs PDU structure of stipulating in the 3GPP Rel5 release criteria as shown in Figure 1, wherein, the effect in each territory is as follows:
VF (Version Flag): version sign, can be used for expansion, current version is set to " 0 ".This fields account 1 bit.
Queue ID (Queue identifier): queue identity is used to identify this packet and transmits on which carrier wave in TD-SCDMA.This fields account 3 bits.
TSN (Transmission Sequence Number): transmission sequence number is used to identify each MAC-sh PDU.This fields account 6 bits.
SID (Size index identifier): the index value of PDU size.This fields account 3 bits.
N (Number of MAC-D PDUs): the number of MAC-D PDU.This fields account 7 bits.
F (Flag): whether sign also has the MAC header of expansion.This fields account 1 bit.
Because transmission sequence number increases progressively numbering at each MAC-sh PDU, wherein Cuo Wu PDU can retransmit and depend on TSN numbering and distinguishes, therefore, adopting sliding window technique to come in the scheme of control data transmission at MAC-shPDU at present, the scope of TSN numbering (when this fields account during with 6 bits, the TSN Serial Number Range is 64) has determined the PDU quantity that maximum in the receiving terminal buffer area can buffer memory.If the scope of TSN numbering is less, then will cause the numbering of new MAC-sh PDU and the MAC-sh PDU of re-transmission to duplicate the situation of numbering, and cause receiving terminal to distinguish, make the transmission course failure.Could guarantee enough to use number of times and retransmit interval that certain relation is arranged when how many TSN fields account gets with bit number with maximum retransmit.Organize in the technical note of the disclosed R2-012330 of being numbered at 3GPP, provided the analysis result shown in the table 1:
Table 1: the peaked corresponding relation of number of retransmissions and TSN
| Retransmit interval | |||
| Maximum TSN | 6 TTI | 8 TTI | 10 TTI |
| 32 (5 bits) | 3 | 2 | 1 |
| 64 (6 bits) | 6 | 4 | 3 |
| 128 (7 bits) | 12 | 9 | 7 |
When this table is illustrated in certain retransmit interval, the maximum retransmission that corresponding TSN field bit quantity can be supported.For example, be under the situation of 8 Transmission Time Intervals (TTI) in retransmit interval, the number of retransmissions that can support when TSN field bit quantity is 6 bits is 4.
In the 3GPP of TD-SCDMA system Rel5 release criteria, adopted and the identical definition of WCDMA system that in the middle of 3GPP standard formulation process, is in leading position, the TSN field is 6 bits as mentioned before.Like this, for the TD-SCDMA terminal of supporting single carrier, the analysis conclusion of table 1 is suitable for.Yet, for the terminal of supporting the multi-carrier HSDPA version, terminal capability rank according to present definition, owing to can adopt maximum 3 carrier waves to carry out downlink data transmission and reception simultaneously, when the MAC-hs PDU quantity of transmission is single carrier in the unit interval 3 times, and these MAC-hs PDU do not distinguish carrier wave and the unified TSN numbering of carrying out, like this, when terminal inserts the multi-carrier HSDPA network, under the prerequisite that guarantees identical number of retransmissions and retransmit interval, just might occur causing the new PDU and the PDU of re-transmission the situation of the identical numbering of TSN to occur, thereby cause the failure transmitted because the bit number of TSN field is not enough.Even or by the control of send window size being avoided occurring the situation of the identical numbering of above-mentioned TSN, but can't give full play to the advantage of multi-transceiver technology, make terminal not reach the peak rate of design, although this moment, terminal had enough Radio Resources available, be subject to the restriction of send window size and cause the base station not send new MAC-hs PDU to this terminal.
The where the shoe pinches of above-mentioned technical problem when reality solves also be in solution also must consideration can the compatible terminal that designs by 3GPP Rel5 release criteria, the terminal that guarantees existing support single-carrier technology is not affected when using HSDPA professional, make simultaneously and support the terminal of multi-transceiver technology can give full play to performance, the mistake that protocol analysis does not take place when in addition, the terminal of supporting multi-carrier HSDPA being worked in the network that moves or roam into single carrier HSDPA by the single carrier form also is the factor that will consider.
Summary of the invention
Can not effectively support TD-SCDMA system multi-carrier HSDPA terminal to carry out the problem of downlink data transmission at MAC-sh PDU structure in the existing 3GPP Rel5 release criteria, the purpose that the present invention will reach provides a kind of method and corresponding system equipment thereof of multicarrier HSDPA backward compatibility, so that under the prerequisite of fully supporting the performance of multi-carrier HSDPA terminal downlink data transmission performance, guaranteeing that the existing 3GPP Rel5 version terminal of supporting single-carrier technology also can insert carries out the HSDPA transfer of data and unaffected in the multi-carrier HSDPA network, make the terminal of supporting multi-carrier HSDPA still can operate as normal by the single carrier form in the network that moves or roam into single carrier HSDPA simultaneously.
For this reason, the invention provides following technical scheme:
A kind of method of supporting backwards compatibility in the HSPDA system comprises step:
A, terminal send message by wave point to radio network controller, support the ability information of HSDPA with reporting terminal;
The MAC-hs protocol Data Unit structure that B, radio network controller are adopted when determining to carry out transfer of data between base station and the terminal according to the HSDPA ability information of terminal;
The MAC-hs protocol Data Unit structure that C, base station adopt step B to determine sends downlink data to described terminal.
Wherein alternatively, described terminal sends the information reporting terminal by wave point to radio network controller and supports that the ability information of HSDPA specifically is during in terminal to report physical layer ability information, under the situation of supporting HSDPA, indicates the number of carriers that can support.
Alternatively, described terminal by wave point when radio network controller sends the information reporting terminal and supports that the ability information of HSDPA specifically is the terminal to report protocol version information, indicate corresponding version, described version information comprises the version of supporting single carrier HSDPA and the version of supporting multi-carrier HSDPA.
Alternatively, described step B comprises: only support single carrier HSDPA if the HSDPA ability information of terminal shows this terminal, then determine the MAC-hs protocol Data Unit structure of this terminal use 3GPP Rel5 version; If the HSDPA ability information of terminal shows this terminal and supports multi-carrier HSDPA, then determine the MAC-hs protocol Data Unit structure of this terminal use support multi-carrier HSDPA version.
Alternatively, described step B comprises: if the information of terminal to report shows the protocol version of this terminal is the version of supporting single carrier HSDPA, then determines the MAC-hs protocol Data Unit structure of this terminal use 3GPP Rel5 version; If it is to support the version of multi-carrier HSDPA then determine that this terminal uses the MAC-hs protocol Data Unit structure of supporting the multi-carrier HSDPA version that the information of terminal to report shows the protocol version of this terminal.
Also comprise before the described step C: radio network controller is when setting up Radio Link for this terminal, by set up the MAC-hs protocol Data Unit structure that is adopted when NumberofSupportedCarriers information element in the request message carries out transfer of data between definite base station of base station indication radio network controller and terminal at Radio Link.
Preferably, described step C is specially:
When Radio Link set up that NumberofSupportedCarriers information element in the request message exists and concrete value greater than 1 the time, the base station uses the MAC-hs protocol Data Unit structure of supporting the multi-carrier HSDPA version to send downlink data to described terminal; Set up that NumberofSupportedCarriers information element in the request message exists and value when equaling 1 when Radio Link, the base station uses the MAC-hs protocol Data Unit structure of 3GPP Rel5 to send downlink data to described terminal.
Wherein, when the terminal of support multi-carrier HSDPA receives the MAC-hs protocol Data Unit, the value of VF field is wherein judged, when VF is set to " 0 ", described terminal is according to the received MAC-hs protocol Data Unit further part of MAC-hs PDU structure elucidation of supporting the multi-carrier HSDPA version, when VF was set to " 1 ", described terminal was according to the received MAC-hs protocol Data Unit further part of the MAC-hs PDU structure elucidation of 3GPP Rel5 release criteria.
The MAC-hs protocol Data Unit structure of described support multi-carrier HSDPA version is to obtain by the TSN field of 6 bits in the 3GPP Rel5 version MAC-hs protocol Data Unit structure is expanded, and its preferred value is 9 bits.
The present invention also provides a kind of multicarrier HSPDA terminal to support the method for backwards compatibility simultaneously, when terminal receives the MAC-hs protocol Data Unit, terminal is judged the value of VF field wherein, when VF is set to " 0 ", described terminal is according to the received MAC-hs protocol Data Unit further part of MAC-hs PDU structure elucidation of supporting the multi-carrier HSDPA version, when VF was set to " 1 ", described terminal was according to the received MAC-hs protocol Data Unit further part of the MAC-hs PDU structure elucidation of 3GPP Rel5 release criteria.
The present invention also provides a kind of base station that multicarrier HSDPA backward compatibility is provided, and comprises following functional unit:
The NBAP message processing unit is used to receive the message that comprises Radio Link foundation request that radio network controller sends;
Control unit, be used for setting up request message and resolve whether comprise the NumberofSupportedCarriers information element from the Radio Link that receives, and in the value of this information element greater than 1 o'clock, indication MAC-hs entity adopts the MAC-hs protocol Data Unit structure of supporting the multi-carrier HSDPA version when being the corresponding terminal transmitting downlink data, otherwise, if this information element value is 1 o'clock, indication MAC-hs entity adopts the MAC-hs protocol Data Unit structure of 3GPP Rel5 version when being the corresponding terminal transmitting downlink data;
The MAC-sh entity is used for when corresponding terminal sends downlink data, according to the MAC-hs protocol Data Unit structure generation MAC-hs protocol Data Unit of control unit indication.
By above technical scheme provided by the invention as can be seen, it is too little to the present invention is directed to the scope that the transmission sequence number TSN of MAC-sh protocol Data Unit structure numbers in the prior art in the multi-carrier HSDPA network, can not give full play to the multi-carrier HSDPA systematic function, and also must consideration in solution can the compatible terminal that designs by 3GPP Rel5 written or printed documents standard, the technical barrier that the terminal that guarantees existing support single-carrier technology is not affected when using HSDPA professional, proposed on the basis that increases a kind of MAC-hs protocol Data Unit structure at multi-carrier HSDPA, radio network controller is determined employed MAC-hs protocol Data Unit structure according to terminal to the ability of multi-carrier HSDPA support, and with this configuration notification base station so that corresponding M AC-hs protocol Data Unit structure is being adopted in the base station when this terminal sends downlink data, and terminal is according to the method that himself adopts corresponding MAC-hs protocol Data Unit structure that the descending MAC-hs protocol Data Unit that receives is resolved to the tenability of multi-carrier HSDPA.By adopting this technological means, not only can effectively support the performance of multi-carrier HSDPA terminal capabilities, assurance reaches the peak rate of design, and can guarantee that the existing terminal of only supporting single carrier HSDPA technology is also smoothly in the access network, carry out the transmission of data, thereby be implemented in the backwards compatibility in the multi-carrier HSDPA network, in addition, support the terminal of multi-carrier HSDPA in the network that moves or roam into single carrier HSDPA, can guarantee also that by the single carrier form mistake of protocol analysis does not take place operate as normal.
Description of drawings
Fig. 1 is the MAC-hs protocol Data Unit structure of 3GPP Rel5 version;
Fig. 2 is the implementing procedure that multicarrier HSDPA backward compatibility is provided of the present invention;
Fig. 3 the present invention proposes the MAC-hs protocol Data Unit structure of supporting multi-carrier HSDPA;
Fig. 4 is the architecture of base station of the simplification of employing the inventive method.
Embodiment
Core of the present invention is to have proposed on the basis that increases a kind of MAC-hs protocol Data Unit structure of supporting multi-carrier HSDPA, radio network controller is determined employed MAC-hs protocol Data Unit structure according to terminal to the ability of multi-carrier HSDPA support, and with this configuration notification base station so that corresponding M AC-hs protocol Data Unit structure is being adopted in the base station when this terminal sends downlink data, and terminal is determined the method that adopts which kind of MAC-hs protocol Data Unit structure that the descending MAC-hs protocol Data Unit that receives is resolved according to its tenability to multi-carrier HSDPA.
In the TD-SCDMA system, starting a data transmission procedure with user terminal is example, and the process that is connected to Resources allocation from startup is as follows:
Carry out RRC (Radio Resource Control, Radio Resource control) set up flow process, set up the radio network controller (RNC of user terminal UE and wireless access network, Radio Network Controller) signaling between connects, and user terminal can report its wireless access capability parameter to radio network controller in this flow process;
Carry out NAS (Non Access Stratum, Non-Access Stratum) and set up flow process, the signaling of setting up user terminal and core network (CN, Core Network) connects, and user terminal can propose the Radio Resource requirement in this flow process;
Carry out RAB (Radio Access Bearer, RAB) sets up flow process, set up the user plane carrying that is used to transmit voice, data and multimedia service between user terminal and the core network, comprise the Radio Resource that wireless access network distributes it to take to user terminal in this flow process.
Each above flow process is finished by the interacting message between user terminal, base station (Node B), radio network controller and the core network.Carried in the message various information elements (IE, InformationElement).Information element has the content and the form of standard code, is used for transmitting between the transmit leg of message and recipient connect required various parameters and other information.Transmit identical parameter and information if desired in the different messages of different flow processs, then can comprise same information element in these message.
Set up in the flow process at RRC, terminal can be in the RRC connection setup complete message, report its wireless access capability to radio network controller, this message is usually transmitted the wireless access capability information of user terminal by it UE radio accesscapability (user terminal wireless access capability) information word that comprises.Simultaneously, user terminal wireless access capability information element also is used in other air-interface information that need transmit this information, as user terminal in the UE capability information message that radio network controller sends; The UE capability information message is used for radio network controller is responded to the UE capability query message that user terminal sends.
Below briefly having described the process of setting up communication link between terminal and the network, is for the solution of the present invention is described better.The present invention is described in further detail below in conjunction with drawings and embodiments.
The realization flow of the inventive method may further comprise the steps as shown in Figure 2:
Step 201: terminal sends message by wave point to radio network controller, supports the ability information of HSDPA with reporting terminal.
Briefly introducing as mentioned, the ability information of terminal can be by corresponding information reporting to the radio network controller in the network, reporting ability information in the time of also can responding according to the capability query information that the requirement of radio network controller is sent to terminal.In the ability information of terminal, comprise the ability information of terminal support HSDPA.This ability information can adopt several modes to represent, specifically depends on the agreement in the standard, but no matter adopts which kind of about definite form, should not influence the validity of inventive concept.For example, terminal supports that the ability information of HSDPA specifically can be when terminal to report physical layer ability information, under the situation of supporting HSDPA, indicates and can support several carrier waves.When perhaps also can pass through the terminal to report protocol version information, indicate corresponding version number, thereby show whether this version supports the multi-carrier HSDPA technology.In order to support this mechanism, just need to arrange in standard in advance: described version information comprises the version of supporting single carrier HSDPA and these two kinds of version informations of version of supporting multi-carrier HSDPA at least.
Step 202: the MAC-hs protocol Data Unit structure that radio network controller is adopted when determining to carry out transfer of data between base station and the terminal according to the HSDPA ability information of terminal.
After radio network controller obtains terminal HSDPA ability information, just can be according to the definite MAC-hs PDU structure that is adopted of the HSDPA ability information of terminal.For example, only support single carrier HSDPA, then determine the MAC-hs PDU structure of this terminal use 3GPP Rel5 version if the HSDPA ability information of terminal shows this terminal; If the HSDPA ability information of terminal shows this terminal and supports multi-carrier HSDPA, then determine the MAC-hs PDU structure of this terminal use support multi-carrier HSDPA version.And if the HSDPA ability information of terminal is indicated by the terminal protocol version, if then the information of terminal to report shows that the protocol version of this terminal is a version of supporting single carrier HSDPA, then determine the MAC-hs PDU structure of this terminal use 3GPP Rel5 version; If it is to support the version of multi-carrier HSDPA then determine that this terminal uses the MAC-hs PDU structure of supporting the multi-carrier HSDPA version that the information of terminal to report shows the protocol version of this terminal.
In above-mentioned steps, even terminal with multi-carrier HSDPA tenability is assigned with the business of using low speed when making all Radio Resources that take all concentrate in the carrier wave because of professional needs, remains and adopt the MAC-hs PDU structure of supporting multi-carrier HSDPA.Here it is to be noted, if a terminal that does not have the HSDPA ability is initiated service request to network, the ability parameter of this terminal to report will not comprise the information element of indicating the HSDPA ability this moment, at this moment radio network controller will be controlled this terminal and utilize conventional dedicated channel (DCH) to carry out the transmission of data, and not by the MAC-sh entity in the base station.
Radio network controller need be indicated the structure of determining to relevant base station after having determined to adopt which kind of MAC-hs PDU structure, in the message of present 3GPP TS25.433 NBAP agreement, does not also support the mechanism of the inventive method.Therefore, in order to support method of the present invention and as a part of the present invention, the present invention further proposes to increase information element NumberofSupportedCarriers in NBAP agreement Radio Link is set up the definition of request message, concrete increase mode see Table 1 and table 2 shown in.Will be understood that the modification of NBAP agreement is also had other form and is not limited thereto,, just do not exceed scope of the present invention so long as its essence is MAC-sh PDU structure in order to be adopted to the base station indication no matter adopt which kind of form.Like this, when setting up Radio Link for this terminal, by set up the MAC-hs PDU structure that is adopted when NumberofSupportedCarriers information element in the request message carries out transfer of data between base station that indication radio network controller in base station is determined and terminal at Radio Link, the message structure that adopts in 3GPP TS25.433 standard, define, and as the part of the consensus standard of supporting multi-carrier HSDPA:
Table 1
| IE/Group Name | Presence | IE Type and Reference |
| Message Type | M | 9.2.1.46 |
| ... | ... | ... |
| HS-DSCH Information | O | HS-DSCH TDD Information 92.3.5F |
| ... | ... | ... |
And specifically being defined as of HS-DSCH TDDInformation information element wherein:
Table 2
| IE/Group Name | Presence | IE Type and Reference |
| HS-DSCH MAC-d Flows Information | M | 9.2.1.31IA |
| UE Capabilities Information | ||
| ... | ... | ... |
| ＞NumberofSupportedCarriers | O | INTEGER(1..16) |
| ... | ... | ... |
Step 203: the base station adopts the MAC-hs PDU structure of determining to send downlink data to described terminal.
The base station is receiving Radio Link that radio network controller sends when setting up request message, when above-mentioned NumberofSupportedCarriers information element exist and concrete value greater than 1 the time, the base station uses the MAC-hs PDU structure of supporting the multi-carrier HSDPA version to send downlink data to described terminal.Set up that NumberofSupportedCarriers information element in the request message exists and value when equaling 1 when Radio Link, the base station uses the MAC-hs PDU structure of 3GPP Rel5 version to send downlink data to described terminal.For described terminal be provided with a TSN variable in the MAC-sh entity this moment, this TSN variable at new MAC-sh PDU (PDU) of every transmission afterwards, 1 operation that automatically adds up, and be mould with 2 power power of corresponding TSN field bit number, after counting is write all over again since 0 counting.
For terminal, when the terminal of support multi-carrier HSDPA receives the MAC-hs protocol Data Unit, at first the value of VF field is wherein judged, when VF is set to " 0 ", described terminal is according to the received MAC-hs protocol Data Unit further part of MAC-hs PDU structure elucidation of supporting the multi-carrier HSDPA version, when VF was set to " 1 ", described terminal was according to the received MAC-hs protocol Data Unit further part of the MAC-hs PDU structure elucidation of 3GPP Rel5 release criteria.Design this function and be terminal in order to make one to have the multi-carrier HSDPA ability, when because move or still can operate as normal when having roamed into single carrier HSDPA network, different is that this terminal can only be carried out resource allocation and transfer of data by the characteristic of this network in single carrier HSDPA network, and promptly the maximum downstream transmission rate can only reach the flank speed of single carrier HSDPA terminal.In order to support this function, require to support that the MAC-hs PDU structure of multi-carrier HSDPA is consistent with the single carrier HSDPAMAC-sh PDU structure of 3GPPRel5 release protocol definition on the structure of VF field at least, its concrete situation can be referring to accompanying drawing 1 and accompanying drawing 3.Like this, terminal with multi-carrier HSDPA ability can be discerned but preceding what insert is the multi-carrier HSDPA network or the single carrier HSDPA network of 3GPP Rel5 version by the VF field, thereby can adopt correct MAC-hs PDU structure and MAC-hs protocol Data Unit to resolve, and concerning with the terminal of only supporting single carrier HSDPA, still the MAC-hs PDU that receives according to the MAC-hs PDU structure elucidation of 3GPP Rel5 version so just can guarantee can not make a mistake to the parsing of MAC-hs PDU.
For a kind of MAC-hs PDU structure that can support multi-carrier HSDPA can be provided, need calculate according to table 1.For the maximum terminal of supporting 3 carrier waves of regulation in the present standard, under all identical situation of other condition, the TSN maximum should be 64 * 3=192, so the TSN field needs 8 bits just can guarantee that the performance of HSDPA system when transfer of data has not been subjected to the influence of send window restriction.Consider from now on and also the number of carriers that terminal can be supported might be brought up to 6 that then to be on the safe side, the present invention is 9 bits for the MAC-sh PDU structure of this support multi-carrier HSDPA with the TSN Field Definition.Certainly these only are the variations of some concrete numerical value, not should be understood to limitation of the present invention, and some other supports the TSN field value of multi-carrier HSDPA performance performance also should comprise within the scope of the invention.Accompanying drawing 3 has provided a kind of MAC-sh PDU concrete structure of supporting multi-carrier HSDPA, equally, this also is appreciated that it only is a kind of exemplary explanation, for example, also can take the TSN field is divided into two parts, wherein the bit number and the position in the PDU structure of the TSN field of first and 3GPP Rel version are in full accord, and second portion is attached to the decline of MAC-hsPDU, to keep the maximum consistency of MAC-sh PDU structure with the definition of 3GPP Rel5 consensus standard.
Method of the present invention not only can be applied in the TD-SCDMA system.At present in the works at the Long Term Evolution of 3GPP, at the WCDMA system method that further employing multi-transceiver technology improves systematic function has been proposed also, therefore, adopt the terminal of the WCDMA standard of multi-carrier HSDPA technology also might occur, and such terminal will run into the same problem described in the background technology introduction of the present invention.Therefore, the present invention also is applicable to the WCDMA system that adopts the multi-carrier HSDPA technology.
Accompanying drawing 4 is the structural representation of the simplification of the base station of employing the inventive method, here the functional unit that has only provided several relevant portions is simply described and correlation, and a complete base station also comprises many for the quite familiar other parts of technical staff, just no longer detailed description here in the art.This base station that multicarrier HSDPA backward compatibility is provided comprises following functional unit:
The NBAP message processing unit is used to receive the message that comprises Radio Link foundation request that radio network controller sends;
Control unit, be used for setting up request message and resolve whether comprise the NumberofSupportedCarriers information element from the Radio Link that receives, and in the value of this information element greater than 1 o'clock, indication MAC-hs entity adopts the MAC-hs PDU structure of supporting the multi-carrier HSDPA version when being the corresponding terminal transmitting downlink data, otherwise, if this information element value is 1 o'clock, indication MAC-hs entity adopts the MAC-hs PDU structure of 3GPP Rel5 version when being the corresponding terminal transmitting downlink data;
The MAC-sh entity is used for when corresponding terminal sends downlink data, according to the MAC-hs PDU structure generation MAC-hs PDU of control unit indication.
It is worthy of note, above-mentioned these functional units are base station entities on logic function that multicarrier HSDPA backward compatibility is provided of the present invention, its specific implementation can adopt and adopt corresponding software or hardware to realize as required, though but adopt which kind of implementation, the definition of these functional units do not influenced.
Above-described embodiment of the present invention does not constitute the qualification to protection range of the present invention.Any any modification of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within the claim protection range of the present invention.
Claims (11)
1. method of supporting backwards compatibility in multicarrier HSPDA system comprises step:
A, terminal send message by wave point to radio network controller, support the ability information of HSDPA with reporting terminal;
The MAC-hs protocol Data Unit structure that B, radio network controller are adopted when determining to carry out transfer of data between base station and the terminal according to the HSDPA ability information of terminal;
The MAC-hs protocol Data Unit structure that C, base station adopt step B to determine sends downlink data to described terminal.
2. the method for in multicarrier HSPDA system, supporting backwards compatibility as claimed in claim 1, it is characterized in that, described terminal sends the information reporting terminal by wave point to radio network controller and supports that the ability information of HSDPA specifically is during in terminal to report physical layer ability information, under the situation of supporting HSDPA, indicate the number of carriers that to support.
3. the method for in multicarrier HSPDA system, supporting backwards compatibility as claimed in claim 1, it is characterized in that, described terminal by wave point when radio network controller sends the information reporting terminal and supports that the ability information of HSDPA specifically is the terminal to report protocol version information, indicate corresponding version, described version information comprises the version of supporting single carrier HSDPA and the version of supporting multi-carrier HSDPA.
4. the method for in multicarrier HSPDA system, supporting backwards compatibility as claimed in claim 2, it is characterized in that, step B comprises: only support single carrier HSDPA if the HSDPA ability information of terminal shows this terminal, then determine the MAC-hs protocol Data Unit structure of this terminal use 3GPP Rel5 version; If the HSDPA ability information of terminal shows this terminal and supports multi-carrier HSDPA, then determine the MAC-hs protocol Data Unit structure of this terminal use support multi-carrier HSDPA version.
5. the method for in multicarrier HSPDA system, supporting backwards compatibility as claimed in claim 3, it is characterized in that, step B comprises: if the information of terminal to report shows the protocol version of this terminal is the version of supporting single carrier HSDPA, then determines the MAC-hs protocol Data Unit structure of this terminal use 3GPP Rel5 version; If it is to support the version of multi-carrier HSDPA then determine that this terminal uses the MAC-hs protocol Data Unit structure of supporting the multi-carrier HSDPA version that the information of terminal to report shows the protocol version of this terminal.
6. the method for in multicarrier HSPDA system, supporting backwards compatibility as claimed in claim 1, it is characterized in that, also comprising before the step C: radio network controller is when setting up Radio Link for this terminal, by set up the MAC-hs protocol Data Unit structure that is adopted when NumberofSupportedCarriers information element in the request message carries out transfer of data between base station that indication radio network controller in base station is determined and terminal at Radio Link.
7. the method for supporting backwards compatibility in multicarrier HSPDA system as claimed in claim 1 is characterized in that step C is specially:
When Radio Link set up that NumberofSupportedCarriers information element in the request message exists and concrete value greater than 1 the time, the base station uses the MAC-hs protocol Data Unit structure of supporting the multi-carrier HSDPA version to send downlink data to described terminal; Set up that NumberofSupportedCarriers information element in the request message exists and value when equaling 1 when Radio Link, the base station uses the MAC-hs protocol Data Unit structure of 3GPP Rel5 version to send downlink data to described terminal.
8. the method for in multicarrier HSPDA system, supporting backwards compatibility as claimed in claim 1, it is characterized in that, when the terminal of support multi-carrier HSDPA receives the MAC-hs protocol Data Unit, the value of VF field is wherein judged, when VF is set to " 0 ", described terminal is according to the received MAC-hs protocol Data Unit further part of MAC-hs PDU structure elucidation of supporting the multi-carrier HSDPA version, when VF was set to " 1 ", described terminal was according to the received MAC-hs protocol Data Unit further part of the MAC-hs PDU structure elucidation of 3GPP Rel5 release criteria.
9. the method for in multicarrier HSPDA system, supporting backwards compatibility as claimed in claim 1, it is characterized in that, the MAC-hs protocol Data Unit structure of described support multi-carrier HSDPA version is to obtain by the TSN field of 6 bits in the 3GPP Rel5 version MAC-hs protocol Data Unit structure is expanded, and its preferred value is 9 bits.
10. a multicarrier HSPDA terminal is supported the method for backwards compatibility, it is characterized in that: when receiving the MAC-hs protocol Data Unit, terminal is judged the value of VF field wherein, when VF is set to " 0 ", described terminal is according to the received MAC-hs protocol Data Unit further part of MAC-hs PDU structure elucidation of supporting the multi-carrier HSDPA version, when VF was set to " 1 ", described terminal was according to the received MAC-hs protocol Data Unit further part of the MAC-hs PDU structure elucidation of 3GPP Rel5 release criteria.
11. the base station that multicarrier HSDPA backward compatibility is provided comprises following functional unit:
The NBAP message processing unit is used to receive the message that comprises Radio Link foundation request that radio network controller sends;
Control unit, be used for setting up request message and resolve whether comprise the NumberofSupportedCarriers information element from the Radio Link that receives, and in the value of this information element greater than 1 o'clock, indication MAC-hs entity adopts the MAC-hs protocol Data Unit structure of supporting the multi-carrier HSDPA version when being the corresponding terminal transmitting downlink data, otherwise, if this information element value is 1 o'clock, indication MAC-hs entity adopts the MAC-hs protocol Data Unit structure of 3GPP Rel5 version when being the corresponding terminal transmitting downlink data;
The MAC-sh entity is used for when corresponding terminal sends downlink data, according to the MAC-hs protocol Data Unit structure generation MAC-hs protocol Data Unit of control unit indication.
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