CN100433863C - Method for increasing decoding speed of base station - Google Patents
Method for increasing decoding speed of base station Download PDFInfo
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- CN100433863C CN100433863C CNB2005100967612A CN200510096761A CN100433863C CN 100433863 C CN100433863 C CN 100433863C CN B2005100967612 A CNB2005100967612 A CN B2005100967612A CN 200510096761 A CN200510096761 A CN 200510096761A CN 100433863 C CN100433863 C CN 100433863C
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Abstract
The invention relates to a method for improving the decoding speed of base station. Wherein, it comprises: user end uses its index number in available transmission format subset as the effective information bit in the ascending transmission format instruction information; sends said ascending transmission format instruction information via its signal channel to the base station; the base station based on the effective information bits, decodes the message of user end sent at the signal channel of ascending transmission format instruction information. The inventive method can reduce the calculation on decoding operation and improve the decoding speed of base station.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of method that strengthens decoding speed of base station.
Background technology
Development along with UMTS 3G (Third Generation) Moblie systems such as (universal mobile telecommunications system), people no longer are satisfied with traditional speech business to the demand of mobile communication, because 3G (Third Generation) Moblie can provide than the more service of high data rate of second generation mobile communication, so in 3-G (Generation Three mobile communication system), emerged a large amount of multimedia services, such as: services such as Internet network are uploaded, browsed at a high speed to visual telephone, picture.Therefore, in 3-G (Generation Three mobile communication system),, introduced the up technology of enhancing (being that the high speed uplink bag inserts) in order to strengthen up-link capacity, to improve the user uplink performance.
In strengthening up technology, important characteristic is NodeB (base station) scheduling controlling flexibly.NodeB is used for the spendable maximum ascending resource of indicating terminal in the resource indication (scheduling indication) of descending transmission.The E-DCH TFC (strengthening the dedicated channel transport format combination) that the scheduling indication is used for terminal selects, and this scheduling indication every TTI of NodeB (Transmission Time Interval) sends once.The scheduling indication is divided into two kinds:
Absolute indication: the absolute limitations that the spendable maximum ascending resource of terminal is provided;
Relatively indication: indication is than the increase of the original resource value that uses or reduce.
Absolute indication is sent by service E-DCH sub-district.Indication is sent by service and non-service cell relatively, as replenishing of absolute indication.Absolute indication information sends by E-AGCH (E-DCH definitely guarantees channel) channel in descending.E-AGCH shares by user ID between different user.The information that comprises in the absolute indication comprises: UE (user terminal) sign, the maximum power ratio that allows of UE etc.
RNC (radio network controller) issues E-TFCS (E-DCH transport format combination set) form by giving UE and NodeB, indicate the big small set of the spendable E-DCH transmission block of this UE, E-TFCI (indication of E-DCH transformat combination) is used for this table transmission block size of index.RNC also can notify NodeB and UE the minimal set call number of E-TFC in the E-TFCS form of indication, minimum available transmission block size when being used to indicate UE to send E-DCH.RNC also can notify the relative indicated horsepower of UE to change step-length.UE can determine available E-TFCS set by the indication of the maximum power in the absolute indication information in the E-TFCS set that is instructed to, can determine the concrete E-TFC that uses in conjunction with relative indication.
UE is with the indication E-TFCI of its concrete E-TFC that uses in E-DCH, by issuing NodeB on E-DPCCH (enhancing Dedicated Physical Control Channel) channel.The form of E-DPCCH as shown in Figure 1.
At TTI is among 2ms and the 10ms, and the loaded information bit is 10 bits among the E-DPCCH, and wherein E-TFCI takies 7 bits, and RSN (retransmission sequence number) takies 2 bits, and Happy (satisfaction) bit takies 1 bit.Wherein RSN is used to indicate HARQ (mix automatically and retransmit) re-transmission sequence number, and it is satisfied that the Happy bit is used to indicate UE to indicate whether for current scheduling.
The coding schematic diagram of loaded information bit as shown in Figure 2 among the E-DPCCH.
In Fig. 2, the RSN bit is X
Rsn, 1, X
Rsn, 2The E-TFCI information bit is: X
Tfci1, X
Tfci, 2..., X
Tfci, 7The Happy bit is: X
H, 1The criterion of the input bit X1...X10 of E-DPCCH chnnel coding is:
X
k＝X
h，1 k＝1；
X
k＝X
rsn，4-k k＝2，3；
X
k＝X
tfci，11-k k＝4，5，...，10。
The E-DPCCH chnnel coding is used second order Reed-Muller (Reed-bridle) coding.E-DPCCH at the coding schematic diagram of UE side as shown in Figure 3, E-DPDCH at the decoding schematic diagram of NodeB side as shown in Figure 4,
In the NodeB side, the soft symbol with the E-DPCCH bit correspondence that is encoded that receives carries out relevant compare operation with all possible E-DPCCH code word, produces metric, then, searches maximum tolerance according to this metric.Afterwards, Hardamard (Hadamard) matrix can be used as effective method and carries out associated translation operation.
A kind of NodeB side is carried out the method for decoded operation and is in the prior art: because the bit number of E-DPCCH is 10 bits, wherein the E-TFCI bit is the direct index of transformat in 256 transformats.Therefore, when the NodeB side is carried out decoded operation, must carry out the fully decoded of the E-DPCCH bit of 10bit, needs and all possible E-DPCCH code word (totally 1024) are carried out the associated translation operation.In actual applications, the NodeB side generally adopts the Hadamard matrix to carry out the associated translation operation, and must adopt the Hardamard matrix of (1024,30).
The NodeB side is carried out the shortcoming of the method for decoded operation and is in the above-mentioned prior art: the E-DPCCH of a channel is carried out decoded operation need carry out 1024*30=30720 time multiply-add operation, operand is very huge, so decoding speed is slow.
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 improves decoding speed of base station, thereby can reduce the operand that NodeB carries out decoded operation, improve the decoding speed of NodeB.
The objective of the invention is to be achieved through the following technical solutions:
A kind of method that improves decoding speed of base station comprises:
A, user terminal will be selected the call number of transformat combination in its available transport format combination subset of use, as the effective information position of uplink form indication information, the channel of this uplink form indication information by uplink form indication information place sent to the base station;
B, base station are carried out decoded operation according to the effective information position in the described uplink form indication information to the message that user terminal sends in the channel at uplink form indication information place.
Described steps A specifically comprises:
The minimum available transmission formats set that the maximum ascending resource that A1, user terminal issue according to the base station limits and radio network controller issues is indicated, and determines the call number of transformat indication information in its available transport format combination subset of its use;
A2, user terminal are with the effective information position of described call number as uplink form indication information, be filled in the relevant position of the channel at uplink form indication information place, and it satisfies the shared physical layer resources of uplink form indication information to fill the redundancy ratio special envoy, sends to the base station then.
Described steps A 1 specifically comprises:
A11, user terminal are determined the transport format combination subset that it is available according to described maximum ascending resource restriction and minimum available transmission formats set indication, select the transformat combination that needs in this transport format combination subset;
A12, user terminal are with the transformat combination of the described selection index in described available transport format combination subset, as the transformat indication information of its use.
The channel at described uplink form indication information place comprises enhancing Dedicated Physical Control Channel E-DPCCH.
Described steps A 2 specifically comprises:
User terminal is filled in relevant position among the E-DPCCH with the transformat indication information of its use, retransmission sequence number RSN information and satisfied mark Happy information, carries out sending to the base station behind Reed-bridle Reed-Muller coding.
Described step B specifically comprises:
Indicate according to the minimum available transmission formats set that maximum ascending resource limits and radio network controller issues of user terminal B1, base station, determines the transport format combination subset that user terminal can be used;
B2, base station are according to the size of described transport format combination subset, determine the effective information position in the uplink form indication information that user terminal sends, select corresponding matrix according to this effective information position, the message that user terminal sends in the channel at uplink form indication information place is carried out decoded operation.
Described step B2 specifically comprises:
B21, base station be according to the size of the transport format combination subset of described user terminal, determine the bit number of significant bit number, RSN and Happy of transformat combination indication of user terminal after, obtain the significant bit number of E-DPCCH;
B22, be 2 exponential, calculate the dimension of the Hadamard Hardamard matrix that need adopt the base station, utilize this Hardamard matrix that the message that user terminal sends in E-DPCCH is carried out decoded operation with the significant bit number of described E-DPCCH.
Described step B22 also comprises:
The base station utilizes described Hardamard matrix that the message that user terminal sends is carried out decoded operation, obtain the transformat indication information that user terminal uses, from described available transport format combination subset, obtain corresponding transmitting block index information according to this transformat indication information.
As seen from the above technical solution provided by the invention, the present invention utilizes the original coding of agreement, interpretation method and structure, with E-TFCI as the call number among the available E-TFCS, reduce the Hardamard matrix dimension that NodeB decoding is adopted, thereby can reduce the operand that NodeB carries out decoded operation, improve the decoding speed of NodeB E-DPCCH.
Description of drawings
Fig. 1 is the form schematic diagram of E-DPCCH;
Fig. 2 is the coding schematic diagram of loaded information bit among the E-DPCCH;
Fig. 3 is the coding schematic diagram of E-DPCCH in the UE side;
Fig. 4 is the decoding schematic diagram of E-DPDCH in the NodeB side;
Fig. 5 is the concrete process chart of the method for the invention.
Embodiment
The invention provides a kind of method that improves decoding speed of base station, core of the present invention is: NodeB and UE utilize the size and the content of the up available transmission formats subclass of known UE use, with the effective information position of its call number in available transmission format subset as uplink form indication information.And then NodeB determines the significant bit number of the channel (for example E-DPCCH) at uplink form indication information place, calculate the dimension of the matrix (for example Hardamard) that needs employing, by reducing the dimension of this matrix, improve the decoding speed of base station to the channel at uplink form indication information place.
Describe the present invention in detail below in conjunction with accompanying drawing, the present invention is to introduce high speed uplink bag access technology in the base station, the channel at uplink form indication information place is E-DPCCH, and the matrix that employing is deciphered in the base station is that Hardamard is that example illustrates the method for the invention.
The concrete process chart of the method for the invention comprises the steps: as shown in Figure 5
Step 5-1, NodeB issue maximum ascending resource restriction to UE.
The message that NodeB issues according to the RNC that receives, the E-TFC minimal set indication of known this E-TFCS subclass correspondence that is issued by RNC is concentrated the E-TFCS subclass of selecting the E-DCH that UE can use and corresponding maximum ascending resource restriction at E-TFCS.Then, by control channel the maximum ascending resource restriction that this E-TFC gathers is handed down to UE.
Step 5-2, UE determine E-TFCS subclass and the corresponding index E-TFCI thereof that it is available.
The E-TFC minimal set that maximum ascending resource limits and RNC the issues indication that UE issues according to the NodeB that receives, concentrate definite its available E-TFCS subclass at E-TFCS, from this E-TFCS subclass, select suitable E-TFC, and the definite call number of E-TFC in available E-TFCS subclass of selecting, this call number is represented with E-TFCI.Be that E-TFCI is not used for index E-TFCS form transmission block size, but in the E-TFCS subclass that UE can use the index of transmission block size in the index E-TFCS form.
Step 5-3, UE issue NodeB according to form filling, the coding of E-DPCCH on the back with E-TFCI and RSN, Happy bit.
The bit number of E-TFCI is 7 among the E-DPCCH, and all E-TFC in the corresponding E-TFCS form, E-TFCI only use wherein partial bit number, therefore, E-TFCI is filled into the correct position of E-TFCI information among the E-DPCCH, and the rest position bit is filled redundant bit.
UE also fills according to the form of E-DPCCH RSN, Happy bit in the E-DPCCH channel, the content that last UE will fill in the E-DPCCH channel carries out issuing NodeB on the corresponding Reed-Muller coding back.
Step 5-4, NodeB select effective E-TFCI bit and RSN, Happy bit according to known available E-TFCS size from E-DPCCH, determine the dimension of appropriate H ardamard matrix, and the message that UE reports in E-DPCCH is carried out decoded operation.
After NodeB receives the message that UE uploads by the E-DPCCH channel, because the size of the E-TFCS subclass that the known UE of NodeB can use, the size of the significant bit of E-TFCI, from E-DPCCH, select effective E-TFCI bit and RSN, Happy bit, and after the significant bit of E-TFCI being added the Happy of the RSN of 2 bits and 1 bit, just can determine the size of the significant bit of E-DPCCH.And then can determine the size of the significant bit of E-DPCCH, it with this significant bit 2 exponential, calculate the dimension of appropriate H ardamard matrix, utilize the message among the E-DPCCH that this Hardamard matrix uploads UE to carry out decoded operation, therefrom separate and translate E-TFCI, then, the index according to this E-TFCI obtains transmission block size in the E-TFCS form from the E-TFCS subclass that UE can use carries out next step operation.
The present invention also provides the method for the invention for two specific embodiments that the high speed uplink bag inserts, and is described below respectively:
Specific embodiment one provided by the invention is: suppose that the minimum transfer piece index in the E-TFC minimal set of UE is 33, the corresponding maximum transmitted piece index of maximum ascending resource restriction of UE is 40, then UE can with the size of E-TFCS subclass be 8, only need represent E-TFCS with 3 bit, in the E-TFCS form index of transmission block size be 33 ... 40}.First E-TFC (being that transport block size index is 33) among the index bit 001 indication E-TFCS, last E-TFC (being that transport block size index is 40) among the bit 111 indication E-TFCS.
UE selects suitable E-TFC, and index bit is filled into the suitable position of E-TFCI among the E-DPCCH, for example with high 3 bits among the E-TFCI of 7 bits as significant bit (filling index bit), the remaining bits among the E-TFCI is filled redundant bit.
UE also fills according to the form of E-DPCCH RSN, Happy bit in the E-DPCCH channel, the content that last UE will fill in the E-DPCCH channel carries out issuing NodeB on the corresponding Reed-Muller coding back.
NodeB receives the message that UE uploads in E-DPCCH after, since the known UE of NodeB can with the size of E-TFCS be 8, the significant bit of E-TFCI is 3, after adding the Happy of the RSN of 2 bits and 1 bit, the significant bit of determining E-DPCCH is 6, from E-DPCCH, select effective E-TFCI bit and RSN, Happy bit, and the dimension that calculates the Hardamard matrix of employing is 2
6=64, utilize the message among the E-DPCCH that this Hardamard matrix uploads UE to carry out decoded operation.Owing to reduced the dimension of Hardamard matrix, therefore, the operand of decoding is reduced to original 1/16.
Specific embodiment two provided by the invention is: suppose that the minimum transfer piece index in the E-TFC minimal set of UE is 0, the corresponding maximum transmitted piece index of maximum ascending resource restriction of UE is 8, then UE can with the size of E-TFCS subclass be 8, only need represent E-TFCS with 3 bit, in the E-TFCS form index of transmission block size be 0 ... 8}.First E-TFC (being that transport block size index is 0) among the index bit 001 indication E-TFCS, last E-TFC (being that transport block size index is 8) among the bit 111 indication E-TFCS.
UE selects suitable E-TFC, and index bit is filled into the suitable position of E-TFCI among the E-DPCCH, for example with high 3 bits among the E-TFCI of 7 bits as significant bit (filling index bit), the remaining bits among the E-TFCI is filled redundant bit.
UE also fills according to the form of E-DPCCH RSN, Happy bit in the E-DPCCH channel, the content that last UE will fill in the E-DPCCH channel carries out issuing NodeB on the corresponding Reed-Muller coding back.
NodeB receives the message that UE uploads in E-DPCCH after, since the known UE of NodeB can with the size of E-TFCS be 8, the significant bit of E-TFCI is 3, after adding the Happy of the RSN of 2 bits and 1 bit, the significant bit of determining E-DPCCH is 6, from E-DPCCH, select effective E-TFCI bit and RSN, Happy bit, and the dimension that calculates the Hardamard matrix of employing is 2
6=64, utilize the message among the E-DPCCH that this Hardamard matrix uploads UE to carry out decoded operation.Owing to reduced the dimension of Hardamard matrix, therefore, the operand of decoding is reduced to original 1/16.
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 (8)
1, a kind of method that improves decoding speed of base station is characterized in that, comprising:
A, user terminal will be selected the call number of transformat combination in its available transport format combination subset of use, as the effective information position of uplink form indication information, the channel of this uplink form indication information by uplink form indication information place sent to the base station;
B, base station are carried out decoded operation according to the effective information position in the described uplink form indication information to the message that user terminal sends in the channel at uplink form indication information place.
According to the method for the described raising decoding speed of base station of claim 1, it is characterized in that 2, described steps A specifically comprises:
The minimum available transmission formats set that the maximum ascending resource that A1, user terminal issue according to the base station limits and radio network controller issues is indicated, and determines the call number of transformat indication information in its available transport format combination subset of its use;
A2, user terminal are with the effective information position of described call number as uplink form indication information, be filled in the relevant position of the channel at uplink form indication information place, and it satisfies the shared physical layer resources of uplink form indication information to fill the redundancy ratio special envoy, sends to the base station then.
According to the method for the described raising decoding speed of base station of claim 2, it is characterized in that 3, described steps A 1 specifically comprises:
A11, user terminal are determined the transport format combination subset that it is available according to described maximum ascending resource restriction and minimum available transmission formats set indication, select the transformat combination that needs in this transport format combination subset;
A12, user terminal are with the transformat combination of the described selection index in described available transport format combination subset, as the transformat indication information of its use.
According to the method for the described raising decoding speed of base station of claim 3, it is characterized in that 4, the channel at described uplink form indication information place comprises enhancing Dedicated Physical Control Channel E-DPCCH.
According to the method for the described raising decoding speed of base station of claim 4, it is characterized in that 5, described steps A 2 specifically comprises:
User terminal is filled in relevant position among the E-DPCCH with the transformat indication information of its use, retransmission sequence number RSN information and satisfied mark Happy information, carries out sending to the base station behind Reed-bridle Reed-Muller coding.
According to the method for claim 1,2,3,4 or 5 described raising decoding speed of base station, it is characterized in that 6, described step B specifically comprises:
Indicate according to the minimum available transmission formats set that maximum ascending resource limits and radio network controller issues of user terminal B1, base station, determines the transport format combination subset that user terminal can be used;
B2, base station are according to the size of described transport format combination subset, determine the effective information position in the uplink form indication information that user terminal sends, select corresponding matrix according to this effective information position, the message that user terminal sends in the channel at uplink form indication information place is carried out decoded operation.
According to the method for the described raising decoding speed of base station of claim 6, it is characterized in that 7, described step B2 specifically comprises:
B21, base station are according to the size of the transport format combination subset of described user terminal, after determining the bit number of significant bit number, RSN and Happy of transformat combination indication of user terminal, the bit number addition of significant bit number, RSN and the Happy of described transformat combination indication is obtained the significant bit number of E-DPCCH;
B22, be 2 exponential, calculate the dimension of the Hadamard Hardamard matrix that need adopt the base station, utilize this Hardamard matrix that the message that user terminal sends in E-DPCCH is carried out decoded operation with the significant bit number of described E-DPCCH.
According to the method for the described raising decoding speed of base station of claim 7, it is characterized in that 8, described step B22 also comprises:
The base station utilizes described Hardamard matrix that the message that user terminal sends is carried out decoded operation, obtain the transformat indication information that user terminal uses, from described available transport format combination subset, obtain the index information of corresponding transmission block size according to this transformat indication information.
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|---|---|---|---|---|
| CN1383622A (en) * | 2000-06-12 | 2002-12-04 | 三星电子株式会社 | Appts. and method for encoding and decoding TFCI in mobile communication system |
| CN1437342A (en) * | 2002-02-04 | 2003-08-20 | 华为技术有限公司 | Decoding method and device for transmission format combination indicating data |
| CN1461535A (en) * | 2001-02-27 | 2003-12-10 | 三星电子株式会社 | Apparatus and method for coding/decoding TFCI bits in asynchronous CDM communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1383622A (en) * | 2000-06-12 | 2002-12-04 | 三星电子株式会社 | Appts. and method for encoding and decoding TFCI in mobile communication system |
| CN1461535A (en) * | 2001-02-27 | 2003-12-10 | 三星电子株式会社 | Apparatus and method for coding/decoding TFCI bits in asynchronous CDM communication system |
| CN1437342A (en) * | 2002-02-04 | 2003-08-20 | 华为技术有限公司 | Decoding method and device for transmission format combination indicating data |
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