CN101114869B - System message block scheduling method and device in UMTS system - Google Patents

System message block scheduling method and device in UMTS system Download PDF

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CN101114869B
CN101114869B CN200610088929XA CN200610088929A CN101114869B CN 101114869 B CN101114869 B CN 101114869B CN 200610088929X A CN200610088929X A CN 200610088929XA CN 200610088929 A CN200610088929 A CN 200610088929A CN 101114869 B CN101114869 B CN 101114869B
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block
information
system information
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CN101114869A (en
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薛倩
张宏涛
郭俊利
闫海军
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Datang Mobile Communications Equipment Co Ltd
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Abstract

The invention discloses a method and a device of dispatching a system information module in a UMTS system to solve the problem that the current UMTS system can not guarantee the successful dispatching of the system information module. The method of the invention comprises that the validity of the current disposition data of all the information modules is determined, the information modules include a dispatching module and a system information module, the corresponding system information dispatching schedule is chosen according to the determination result and the needed dispatching module and the related dispatching information between every dispatching module and every information module are decided and the related dispatching information is provided to a user terminal. The invention can correctly determine the needed dispatching module needed when calling the system information and the dispatching information of every system information module to guarantee the effectiveness and the credibility of the dispatching of the system information module.

Description

Method and device for scheduling system information block in UMTS system
Technical Field
The present invention relates to the field of mobile communications, and in particular, to a method and an apparatus for scheduling system information blocks in a UMTS system.
Background
In a Universal Mobile Telecommunications System (UMTS), after a User Equipment (UE) is turned on, cell search is performed first, and after a suitable cell is searched, a Broadcast Channel (BCH) of the cell is read to acquire corresponding System information (including information such as current cell common resources and cell reselection), and the UE can establish a connection with a base station NodeB of a WCDMA System according to the System information. Therefore, the system information is a bridge between the UE and the network, and whether the system information can be correctly transmitted determines whether the wireless access of the UE can be successfully completed.
In order to accurately and efficiently transmit System Information (SIB) from a Radio interface, a UMTS Terrestrial Radio Access Network (UTRAN) needs to set values of the System Information blocks and reasonably schedule the System Information blocks, for example: the system information blocks are segmented/concatenated into a format and length suitable for the broadcast channel BCH transport block.
The main system Information Block (Master Information Block, MIB) or the scheduling Block (Schedule Block1/Schedule Block 2, SB1/SB2) is mainly used to contain scheduling Information of each system Information Block, and therefore, the system Information blocks are scheduled first, and after obtaining their scheduling Information, the scheduling Information of each system Information Block is filled into the main system Information Block or the scheduling Block. The scheduling information mainly comprises information such as a repetition period SIB _ REP, a segment number SEG _ COUNT, an initial position SIB _ POS, a position offset SIB _ OFF and the like; wherein,
SIB _ REP, representing the repetition period of the system information block SIB, for example: if the repetition period is 4, the SIB is sent every 4 frames, which are 10ms radio frames; each system information block, main system information block or scheduling block should give its corresponding SIB _ REP, which is generally defined as that the smaller the SIB _ REP is, the higher the priority is, where MAX _ REP is the largest repetition period among all system information blocks, that is, the repetition periods of all information blocks are sorted from small to large.
SEG _ COUNT, representing the number of SIB segments, is calculated as follows:
SEG _ COUNT i = floor ( Len Si d i Len BCH - R ) , i.e. SEG _ COUNTi is equal to
Figure G06188929X20060801D000022
The upper integer of (1); wherein:
LenSibi: the length of the coded Sibi;
LenBCH: one removes the length of the consumed BCH transport block;
r: the amount of the reservation.
For example: Len Sibi Len BCH - R = 2.5 in the case of (1), SEG _ count is equal to 3.
SIB _ POS, which represents the position of the SIB or the first segment of the SIB in one repetition period, SIB _ POS being 0.. SIB _ REP-2, in steps of 2; assuming that SIB _ REP is 4, the value range of the first segmentation position of the system information block is 0 or 2; if SIB _ REP equals 8, the value range of the first segmentation position of the system information block is 0, 2, 4 or 6.
SIB _ OFF, which indicates the position offset between the subsequent segment and the previous segment after SIB, SB1, or SB2 segmentation, denoted as SIB _ OFF (i), i is 1, 2. SIB _ OFF is arranged in ascending order.
There are two uncertain factors in the existing UMTS system:
1. the number of the scheduling blocks, namely the required scheduling blocks;
2. the correspondence between scheduling information of each system information block and a scheduling block, i.e., which scheduling information of which system information blocks should be included in which scheduling block.
The above-mentioned uncertainty causes the scheduling information of the system information block to depend on the coded length of each scheduling block, which in turn depends on the scheduling information of each system information block, thus forming a "cyclic dependency".
For the above problems, the existing system information scheduling methods all adopt a pre-estimation principle, that is, the number of the required scheduling blocks is estimated in advance according to the length of each system information block after being coded, and then the scheduling information of each system information block is obtained on the basis. However, when the size of some system information blocks changes, the original scheduling information is likely to be no longer applicable, so that parameters such as the repetition period of the system information blocks need to be continuously adjusted to obtain a set of proper configuration data again, and the processing is complex; and in some cases, system information scheduling may fail due to the failure to find suitable configuration data.
Disclosure of Invention
In view of the above, the present invention provides a method and an apparatus for scheduling a system information block in a UMTS system, so as to solve the problem in the prior art that when configuration data of the system information block is unavailable, processing is complex, and even the system information block cannot be successfully scheduled
The invention comprises the following scheme:
a method for scheduling system information block in UMTS system includes step aggregation
Judging the availability of current configuration data of all information blocks, wherein the information blocks comprise a scheduling block and a system information block;
when the configuration data is available and the system information block scheduling fails, determining the required scheduling blocks again according to the system information block scheduling scheme with unavailable configuration data, determining the relevant scheduling information of each scheduling block and each system information block, and providing the relevant scheduling information to the user terminal;
when the configuration data is unavailable, determining a required scheduling block according to a system information block scheduling scheme with unavailable configuration data, determining relevant scheduling information of each scheduling block and each system information block, and providing the relevant scheduling information to a user terminal;
wherein the scheduling scheme for the system information block with unavailable configuration data comprises:
calculating the repetition period of a system information block corresponding to a set scheduling block according to the repetition period of each scheduling block and the parameter value of the scheduling block, calculating the length of the set scheduling block according to the repetition period, determining the set scheduling block as a required scheduling block when the length of the set scheduling block is less than or equal to the length of a broadcast channel BCH transmission block, and otherwise, increasing the number of the set scheduling blocks and recalculating the length of the set scheduling block until a proper scheduling block is found, wherein the set scheduling block comprises: one or more of a main system information block (MIB), a first scheduling block (SB1), and a second scheduling block (SB 2).
Wherein the scheduling blocks include a main system information block MIB, a first scheduling block SB1, and a second scheduling block SB 2.
Wherein the configuration data includes a repetition period and a number of segments.
In the method, the availability of the configuration data is judged according to whether one half of the maximum repetition period in all the information blocks is not less than the total number of system frame numbers SFN occupied by each system information block and each scheduling block in the maximum repetition period, and if not, the availability of the configuration data is judged; otherwise, judging that the configuration data is unavailable.
When the configuration data is available, calculating the total length of scheduling information of a system information block corresponding to a set scheduling block according to the repetition period of each system information block, and determining a required scheduling block according to the total length of the scheduling information;
determining scheduling information of each information block according to the repetition period of each system information block, wherein the determining of the scheduling information of each information block refers to searching the determined scheduling block and the vacant position of each system information block in the corresponding repetition period in a System Frame Number (SFN) sequence, marking the vacant position as occupied when the vacant position is determined as the initial position of the information block, searching the vacant position of a subsequent segment in the corresponding repetition period of each information block according to the vacant position, and marking the searched vacant position as occupied.
When the set scheduling block is MIB, and the total length of the scheduling information of all the system information blocks is less than or equal to the difference value between the length of a broadcast channel BCH transmission block and a set value, determining that the scheduling block only needs the MIB; otherwise, the set scheduling block is updated to MIB and SB1, and the required scheduling block is determined by calculating the total length of the scheduling information of the remaining SIBs except the scheduling information accommodated in MIB.
When the set scheduling blocks are MIB and SB1, when the total length of the scheduling information of the rest SIBs except the scheduling information contained in the MIB is less than or equal to the length of a broadcast channel BCH transmission block, determining that the scheduling blocks need the MIB and SB 1; otherwise, the set scheduling blocks are updated to MIB, SB1, and SB2, and the required scheduling blocks are determined by calculating the total length of scheduling information of the remaining SIBs except for the scheduling information accommodated in MIB and SB 1.
Wherein when the set scheduling blocks are MIB, SB1 and SB2, when the total length of scheduling information of the remaining SIBs except for the scheduling information accommodated in MIB and SB1 is less than or equal to the length of the broadcast channel BCH transport block, it is determined that the scheduling blocks require MIB, SB1 and SB2, otherwise, it is determined that the scheduling blocks are MIB, SB1 and SB2, and SB1 and/or SB2 are to be segmented.
In the above method, determining the scheduling information of each information block refers to searching the scheduling block and the empty position of each system information block in its corresponding repetition period in the SFN sequence of the system frame number, and marking the empty position as "occupied" when determining that the empty position is the initial position of the information block, and searching the empty position of the subsequent segment in the repetition period corresponding to each information block according to the empty position, and marking the searched empty position as "occupied".
And one half of the repetition period of the system information block is not less than the sum of the number of the system frame numbers SFN occupied by the scheduling block in the repetition period of the system information block and the total number of the system frame numbers SFN occupied by all the system information blocks.
An apparatus for scheduling system information blocks in a UMTS system, comprising:
the resource management unit is used for managing configuration data of each information block, and each information block comprises a scheduling block and a system information block;
the judging unit is used for judging the availability of the current configuration data of each information block and outputting the judgment result to the scheduling unit;
the scheduling unit is used for determining the required scheduling blocks according to the scheduling scheme of the system information blocks with unavailable configuration data again and determining the relevant scheduling information of each scheduling block and each system information block when the configuration data is available and the scheduling of the system information blocks fails, and when the configuration data is unavailable, determining the required scheduling blocks according to the scheduling scheme of the system information blocks with unavailable configuration data and determining the relevant scheduling information of each scheduling block and each system information block;
a sending unit, configured to provide the relevant scheduling information to a user terminal;
when the configuration data is unavailable, the scheduling unit is further configured to calculate a repetition period of a system information block corresponding to a set scheduling block according to the repetition period of each scheduling block and a scheduling block parameter value, calculate the length of the set scheduling block according to the repetition period, determine the set scheduling block as a required scheduling block when the length of the set scheduling block is less than or equal to the length of a broadcast channel BCH transmission block, otherwise, increase the number of the set scheduling blocks, and recalculate the length of the set scheduling block until a suitable scheduling block is found, where the set scheduling block includes: one or more of a main system information block (MIB), a first scheduling block (SB1), and a second scheduling block (SB 2).
The judging unit judges the availability of the configuration data according to whether one half of the maximum repetition period in all the information blocks is not less than the total number of system frame numbers SFN occupied by all the system information blocks and the scheduling blocks in the maximum repetition period, and if not, judges the availability of the configuration data; otherwise, judging that the configuration data is unavailable.
When the configuration data is available, the scheduling unit calculates the total length of scheduling information of a system information block corresponding to a set scheduling block according to the repetition period of each system information block, and determines a required scheduling block according to the total length of the scheduling information; and determining scheduling information of each information block according to the repetition period of each system information block, wherein the determining of the scheduling information of each information block refers to searching the determined scheduling block and the vacancy of each system information block in the corresponding repetition period in a System Frame Number (SFN) sequence, marking the vacancy as occupied when the vacancy is determined as the initial position of the information block, searching the vacancy of a subsequent segment in the repetition period corresponding to each information block according to the vacancy, and marking the searched vacancy as occupied.
When the set scheduling block is an MIB, the scheduling unit determines that the scheduling only needs the MIB when the total length of the scheduling information of all the system information blocks is less than or equal to the difference value between the length of a broadcast channel BCH transmission block and a set value; otherwise, the set scheduling block is updated to MIB and SB1, and the required scheduling block is determined by calculating the total length of the scheduling information of the remaining SIBs except the scheduling information accommodated in MIB.
When the set scheduling blocks are MIB and SB1, the scheduling unit determines that the MIB and SB1 are needed for the scheduling blocks when the total length of the scheduling information of the remaining SIBs except the scheduling information contained in the MIB is less than or equal to the length of the broadcast channel BCH transport block; the set scheduling blocks are updated to MIB, SB1, and SB2, and the required scheduling blocks are determined by calculating the total length of scheduling information of the remaining SIBs except for the scheduling information accommodated in MIB and SB 1.
The scheduling unit determines that the scheduling blocks require the MIB, SB1 and SB2 when the set scheduling blocks are MIB, SB1 and SB2, and the total length of the tuning information of the remaining SIBs excluding the scheduling information accommodated in MIB and SB1 is less than or equal to the length of the broadcast channel BCH transport block, and otherwise determines that the scheduling blocks are MIB, SB1 and SB2, and SB1 and/or SB2 are to perform segmentation.
When the scheduling unit calculates the repetition period of the system information block, one half of the repetition period of the system information block is not less than the sum of the number of the system frame numbers SFN occupied by the scheduling block in the repetition period of the system information block and the total number of the system frame numbers SFN occupied by all the system information blocks.
The invention has the following beneficial effects:
the method adopts a method for evaluating the availability of the configuration data in advance to accurately determine the number of the required scheduling blocks and the scheduling information of each system information block, avoids blind scheduling operation, and reduces the possibility of scheduling failure of the system information blocks; moreover, under the condition that the configuration data is not appropriate, the scheduling of the system information block can still be successfully completed by adopting the method, thereby ensuring the effectiveness and the reliability of the scheduling of the system information block.
Drawings
Fig. 1 is a schematic structural diagram of an apparatus for scheduling system information blocks according to an embodiment of the present invention;
FIG. 2 is a flow chart of a main implementation of system information block scheduling in an embodiment of the present invention;
FIG. 3 is a flowchart of a first implementation of a system information block scheduling scheme according to an embodiment of the present invention;
fig. 4 is a flowchart of a second implementation of the system information block scheduling scheme in the embodiment of the present invention.
Detailed Description
In order to solve the problem that the successful scheduling of the system information block cannot be guaranteed in the prior art, the availability of the configuration data is evaluated in advance before the system information is scheduled, and the scheduling scheme of the system information block is further determined according to the evaluation result.
In the embodiment of the invention, the system information blocks are divided into two types, namely a scheduling block and a system information block; the scheduling block includes MIB, SB1, and SB2, and other system information blocks are all referred to as system information blocks SIB.
In this embodiment, the following two schemes can be adopted to implement scheduling of the system information block:
the first scheme is as follows: firstly, acquiring the repetition period of each system information block, determining a required scheduling block by calculating the total length of scheduling information of each system information block, and then determining the scheduling blocks and relevant scheduling information of each system information block.
Scheme II: firstly, obtaining the repetition period of each scheduling block, selecting the parameter value of the scheduling block to calculate the repetition period of each system information block, calculating the length of each scheduling block according to the repetition period to determine the required scheduling block, and then determining the scheduling information related to each scheduling block and each system information block.
Please refer to fig. 1, which is a schematic structural diagram of a device for scheduling system information blocks in a UMTS system according to this embodiment, where the device includes a resource management unit 10, a determination unit 11, a scheduling unit 12 and a sending unit 13; the resource management unit 10 is configured to manage configuration data of each scheduling block and each system information block; the judging unit 11 is configured to judge availability of current configuration data of each scheduling block and each system information block, and output a judgment result to the scheduling unit 12; the scheduling unit 12 is configured to select a corresponding system information block scheduling scheme according to the determination result, and determine each scheduling block and relevant scheduling information of each system information block; when the configuration data is available, scheduling by adopting the first scheme; when the configuration data is unavailable, scheduling by adopting the second scheme; the sending unit 13 is configured to provide the relevant scheduling information to the user terminal.
As shown in fig. 2, the main implementation flow of system information block scheduling in the UMTS system is as follows:
step 200, resource management unit 10 obtains the repetition period SIB _ REP of each scheduling block and each system information block.
Step 201, performing asn.1 coding on each scheduling block and each system information block.
Step 202, calculating the number of segments SEG _ COUNT of each system information block, at this time, the number of segments corresponding to each scheduling block is defaulted to 1.
Step 203, select the largest repetition period MAX _ REP from all repetition periods.
Step 204, resource management unit 10 brings SIB _ REP, MAX _ REP, and SEG _ COUNT into the following formulas;
<math><mrow><munderover><mi>&Sigma;</mi><mrow><mi>i</mi><mo>=</mo><mn>0</mn></mrow><mi>MaxIb</mi></munderover><mrow><mo>(</mo><mfrac><mrow><mi>MAX</mi><mo>_</mo><mi>REP</mi></mrow><mrow><mi>SIB</mi><mo>_</mo><msub><mi>REP</mi><mi>i</mi></msub></mrow></mfrac><mo>&times;</mo><mi>SEG</mi><mo>_</mo><mi>COUN</mi><msub><mi>T</mi><mi>i</mi></msub><mo>)</mo></mrow><mo>&le;</mo><mi>MAX</mi><mo>_</mo><mi>REP</mi><mo>/</mo><mn>2</mn><mo>-</mo><mo>-</mo><mo>-</mo><mrow><mo>(</mo><mn>1</mn><mo>)</mo></mrow></mrow></math>
namely: the total number of system frame numbers SFN occupied by each system information block and each scheduling block in the maximum repetition period of all the information blocks is less than or equal to one half of the maximum repetition period; wherein: MaxIb is the total number of all information blocks to be transmitted (including MIB, SB1, and SB 2).
Step 205, the judging unit 11 judges whether the formula (1) is established; if true, go to step 206; otherwise, step 208 is performed.
Step 206, the scheduling unit 12 selects the first scheme to perform the system information block scheduling.
Step 207, the scheduling unit 12 determines whether the first scheme is successfully scheduled; if successful, step 209 is performed, otherwise, step 208 is performed.
Step 208, the scheduling unit 12 selects scheme two to perform system information block scheduling.
In step 209, the transmitting unit 13 provides the scheduling information of all the scheduling blocks and the system information block to the user terminal.
The following describes schemes one and two in detail.
For the first scheme, the repetition period of each system information block is firstly acquired, the required scheduling block is determined by calculating the total length of the scheduling information of each system information block, and then the relevant scheduling information of each scheduling block and each system information block is determined. As shown in fig. 3, the process of implementing system information block scheduling by using the first scheme is as follows:
step 300, the resource management unit 10 obtains SIB _ REP and SEG _ COUNT of each system information block.
Step 301, assuming that the scheduling information of all SIBs can be accommodated by using the scheduling block MIB, the scheduling unit 12 calculates the total length Len of the scheduling information of all SIBsTotal_Sib；
Calculating the length of each system information block after coding according to the following formula:
<math><mrow><msub><mi>Len</mi><mi>Sibi</mi></msub><mo>=</mo><mn>15</mn><mo>+</mo><msub><mi>B</mi><mi>i</mi></msub><mo>+</mo><msub><mi>log</mi><mn>2</mn></msub><mrow><mo>(</mo><mfrac><mrow><mi>SIB</mi><mo>_</mo><msub><mi>REP</mi><mi>i</mi></msub></mrow><mn>2</mn></mfrac><mo>)</mo></mrow><mo>+</mo><mn>4</mn><mo>&times;</mo><msub><mi>C</mi><mi>i</mi></msub><mo>-</mo><mo>-</mo><mo>-</mo><mrow><mo>(</mo><mn>2</mn><mo>)</mo></mrow></mrow></math>
wherein,
Figure G06188929X20060801D000082
Figure G06188929X20060801D000083
secondly, the length of the encoded MIB block is calculated according to the following formula:
<math><mrow><msub><mi>Len</mi><mrow><mi>MIB</mi><mo>/</mo><mi>SB</mi><mn>1</mn><mo>/</mo><mi>SB</mi><mn>2</mn></mrow></msub><mo>=</mo><mi>A</mi><mo>+</mo><munderover><mi>&Sigma;</mi><mrow><mi>i</mi><mo>=</mo><mn>0</mn></mrow><mi>n</mi></munderover><msub><mi>Len</mi><mi>Sibi</mi></msub><mo>-</mo><mo>-</mo><mo>-</mo><mrow><mo>(</mo><mn>3</mn><mo>)</mo></mrow></mrow></math>
wherein,
n is the number of information blocks
Figure G06188929X20060801D000091
Wherein,
RNC: for wireless Network controller (Radio Network controller)
MNC: is a Mobile Network Code (Mobile Network Code)
Thirdly, the total length Len of the scheduling information of all SIB is calculated according to the following formulaTotal_Sib：
<math><mrow><msub><mi>Len</mi><mrow><mi>Total</mi><mo>_</mo><mi>Sib</mi></mrow></msub><mo>=</mo><munderover><mi>&Sigma;</mi><mrow><mi>i</mi><mo>=</mo><mn>0</mn></mrow><mi>MaxSib</mi></munderover><msub><mi>Len</mi><mi>Sibi</mi></msub><mo>-</mo><mo>-</mo><mo>-</mo><mrow><mo>(</mo><mn>4</mn><mo>)</mo></mrow></mrow></math>
In this step, the information blocks include all system information blocks SIB, scheduling block SB1 and scheduling block SB 2; the information block MaxSib to be transmitted comprises all system information blocks SIB.
Step 302, dispatch sheetElement 12 judges LenTotal_Sib≤LenBCH-whether a is true; if yes, go to step 303; otherwise, step 304 is performed.
Step 303, the scheduling unit 12 determines that the MIB scheduling block is only needed to accommodate the scheduling information of all SIBs, and then step 316 is executed.
Step 304, assuming that all SIBs' scheduling information can be accommodated using MIB and SB1, scheduling unit 12 calculates the MIB encoded length LenMIB(the scheduling information of SB1 is contained in the MIB); firstly, according to the above formula (2), the length Len after encoding the SIB (including the scheduling block SB1) is calculatedSib(ii) a Then, according to the formula (3), the length Len of the encoded MIB is calculatedMIB(ii) a In this step, the information block includes all system information blocks SIB and scheduling blocks SB 1.
Step 305, the scheduling unit 12 calculates the total length Len of the scheduling information of all SIBs according to the above formula (4)Total_Sib(ii) a In this step the information block MaxSib to be transmitted comprises all system information blocks SIB, scheduling blocks MIB and scheduling blocks SB 1.
Step 306, the scheduling unit 12 calculates the total length Len of the scheduling information of the remaining SIBLeaving1_Sib(ii) a The total length of the scheduling information of the remaining SIBs, excluding the scheduling information that can be accommodated in the MIB, is obtained according to the following formula.
LenLeaving1_Sib＝LenTotal_Sib-LenMIB (5)
Step 307, the scheduling unit 12 determines LenLeaving1_Sib≤LenBCHWhether the result is true or not; if true, go to step 308; otherwise, step 309 is performed.
Step 308, scheduling unit 12 determines that MIB and SB1 scheduling blocks are required to accommodate scheduling information of all SIBs, and proceeds to step 316.
Step 309, assuming that the scheduling information of all SIBs is accommodated using MIB, SB1 and SB2, the scheduling unit 12 calculates the length Len of MIB according to the above equations (2) and (3)MIB(scheduling)The scheduling information of blocks SB1 and SB2 is contained in the MIB); in this step, the information blocks include all system information blocks SIB, scheduling block SB1 and scheduling block SB 2.
In step 310, the scheduling unit 12 calculates the length Len of SB1 according to the above equations (2) and (3)SB1(ii) a In this step, the information blocks include all system information blocks SIB.
Step 311, the scheduling unit 12 calculates the total length Len of the scheduling information of all SIBs according to the above formula (4)Total_Sib(ii) a In this step, the information block MaxSib to be transmitted includes all system information blocks SIB, scheduling block MIB, scheduling block SB1 and scheduling block SB 2.
Step 312, scheduling unit 12 calculates total length Len of scheduling information of remaining SIBLeaving2_Sib(ii) a The total length of scheduling information of the remaining SIBs, excluding the scheduling information that can be accommodated in the MIB and SB1, is obtained according to the following formula.
LenLeaving2_Sib＝LenTotal_Sib-LenMIB-LenSB1 (6)
Step 313, the scheduling unit 12 determines LenLeaving2_Sib≤LenBCHWhether the result is true or not; if true, go to step 314; otherwise, step 315 is performed.
Step 314, scheduling unit 12 determines that MIB, SB1 and SB2 scheduling blocks are required to accommodate scheduling information of all SIBs, and performs step 316.
Step 315, scheduling unit 12 segments SB1 and/or SB2, determines MIB, SB1 and SB2 are needed and SB1 and/or SB2 segmentation is needed to accommodate the scheduling information of all SIBs.
Step 316, the scheduling unit 12 determines SIB _ POS and SIB _ OFF of the main system information block MIB; the initial position of the MIB in the System Frame Number (SFN) sequence period is fixed, i.e. SIB _ POS is constantly 0; in one broadcast period, all SFN location indicators for transmitting the MIB are marked as "occupied" according to the repetition period SIB _ REP of the MIB.
Step 317, the scheduling unit 12 determines SIB _ POS and SIB _ OFF of the scheduling blocks SB1 and SB2 and the respective system information blocks SIBs;
in step 318, the transmitting unit 13 provides the scheduling information of all scheduling blocks and system information blocks to the user terminal.
The main implementation process of the above step 317 is as follows:
determining SIB _ POS of each information block
In the SFN sequence, each system information block and call block SB1, SB2 searches for a null from SFN-2 to its corresponding SIB _ REP, respectively; if a vacancy is found, mark that location as "occupied"; alternatively, although the SFN is already occupied, its remaining space is still sufficient to accommodate the information block (if the information block type is a short whole segment or the first segment type of the information block is a short segment), then this location is confirmed as the SIB _ POS for the information block.
Determining the position offset SIB _ OFF of all segments of each information block
According to the SIB _ POS obtained in the above steps, each system information block and the calling blocks SB1, SB2 respectively search the vacancy of the second segment from the corresponding SIB _ POS +2 to SIB _ REP in the SFN sequence, if the vacancy is found, the difference between the vacancy and the SIB _ POS is defined as SIB _ OFF [1] of the second segment, then the SIB _ REP is found from the position of the second segment, the position of the third segment is found, and the recursion is performed in sequence until the positions of all segments are found.
Thirdly, all positions of each information block in the broadcast period are marked as occupied "
Marking the position SIB _ POS + nxsib _ REP of the information block as "occupied";
the segmentation position SIB _ POS + n SIB _ REP + SIB _ OFF of the information block is divided into several segments]Marked as "occupied"; wherein: n is 0, 1, 2.,
Figure G06188929X20060801D000111
count isNumber of segments, from 1 to SEG _ COUNT-1.
For the second scheme, firstly, the repetition period of each scheduling block is obtained, the parameter value of each scheduling block is selected to calculate the repetition period of each system information block, the length of each scheduling block is calculated according to the repetition period to determine the required scheduling block, and then the scheduling information related to each scheduling block and each system information block is determined. As shown in fig. 4, the process of implementing system information block scheduling by using scheme two is as follows:
step 400, the resource management unit 10 obtains the repetition periods of MIB, SB1 and SB2, which are respectively recorded as: MIB _ REP, SB1_ REP and SB2_ REP; it is assumed that the repetition period of all other system information blocks is the same, denoted as COMMON _ REP.
Step 401, the scheduling unit 12 selects the S value;
initially assuming that only one scheduling block of the MIB is needed, COMMON _ REP is calculated according to the following formula:
<math><mrow><mi>S</mi><mo>+</mo><munderover><mi>&Sigma;</mi><mrow><mi>i</mi><mo>=</mo><mn>0</mn></mrow><mi>MaxSib</mi></munderover><mrow><mo>(</mo><mi>SEG</mi><mo>_</mo><msub><mi>COUNT</mi><mi>i</mi></msub><mo>)</mo></mrow><mo>&le;</mo><mi>COMMON</mi><mo>_</mo><mi>REP</mi><mo>/</mo><mn>2</mn><mo>-</mo><mo>-</mo><mo>-</mo><mrow><mo>(</mo><mn>7</mn><mo>)</mo></mrow></mrow></math>
namely: the sum of the number of the SFN occupied by the scheduling block in the repetition period of the system information block and the total number of the SFN occupied by all the system information blocks is less than or equal to one half of the repetition period of the system information block.
Wherein, the S represents the number of SFNs occupied by the required scheduling block in the repetition period of the system information block, the number of scheduling blocks is different, and the corresponding S is also different, and the calculation formula is as follows:
S = COMMON _ REP MIB _ REP (MIB only is required);
S = COMMON _ REP MIB _ REP + COMMON _ REP SB 1 _ REP (MIB and SB1 are required);
S = COMMON _ REP MIB _ REP + COMMON _ REP SB 1 _ REP + COMMON _ REP SB 2 _ REP (MIB, SB1, and SB2 are required);
<math><mrow><mi>S</mi><mo>=</mo><mfrac><mrow><mi>COMMON</mi><mo>_</mo><mi>REP</mi></mrow><mrow><mi>MIB</mi><mo>_</mo><mi>REP</mi></mrow></mfrac><mo>+</mo><mfrac><mrow><mi>COMMON</mi><mo>_</mo><mi>REP</mi></mrow><mrow><mi>SB</mi><mn>1</mn><mo>_</mo><mi>REP</mi></mrow></mfrac><mo>&times;</mo><mi>SB</mi><mn>1</mn><mo>_</mo><mi>SEG</mi><mo>_</mo><mi>COUNT</mi></mrow></math>
<math><mrow><mo>+</mo><mfrac><mrow><mi>COMMON</mi><mo>_</mo><mi>REP</mi></mrow><mrow><mi>SB</mi><mn>2</mn><mo>_</mo><mi>REP</mi></mrow></mfrac><mo>&times;</mo><mi>SB</mi><mn>2</mn><mo>_</mo><mi>SEG</mi><mo>_</mo><mi>COUNT</mi></mrow></math>
(MIB, SB1 and SB2 are required, and SB1 and/or SB2 are fragmented);
step 402, the scheduling unit 12 calculates COMMON _ REP according to the above formula (7).
Step 403, the scheduling unit 12 calculates the length Len of the coded scheduling block according to the above formulas (2) and (3)MIB。
Step 404, the scheduling unit 12 determines LenMIB/SB1/SB2＞LenBCHWhether the result is true or not; if yes, return to step 401; otherwise, continue with step 405; if LenMIB＞LenBCHIf all the SIB scheduling information cannot be accommodated in the MIB, then, assuming that the blocks MIB and SB1 need to be scheduled, the process returns to step 401, selects the value S again and substitutes it into the above equation (7) to calculate a new COMMON _ REP, and substitutes the COMMON _ REP into the above equations (2) and (3) to calculate LenMIBAnd LenSB1Then judging LenMIBAnd LenSB1Whether all are less than or equal to LenBCHIf LenMIBAnd LenSB1Are all less than or equal to LenBCHThen determining that the scheduling blocks MIB and SB1 are needed; otherwise, assuming that the scheduling blocks MIB, SB1, and SB2 are needed, the above steps 401 to 404 are repeated until a suitable scheduling block is found.
Step 405, the scheduling unit 12 determines SIB _ POS and SIB _ OFF of the main system information block MIB; the implementation process of this step is the same as that of step 316, and is not described again.
Step 406, the scheduling unit 12 determines SIB _ POS and SIB _ OFF of the scheduling blocks SB1 and SB2 and the respective system information blocks SIBs; the implementation process of this step is the same as step 317, and is not described again.
Step 407, the transmitting unit 13 provides the scheduling information of all scheduling blocks and system information blocks to the user terminal.
It can be seen from the above system information block scheduling process that the repetition period of the system information block can be configured according to the needs by adopting the invention, thereby meeting the specific requirements for the cell system information; under the condition that the preset repetition period causes the scheduling of the system information block to fail, the invention can still ensure the success of the scheduling of the system information block, thus not only giving priority to the effectiveness of the scheduling of the system information block, but also ensuring the reliability of the scheduling of the system information block.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims (17)

1. A method for scheduling system information blocks in a UMTS system, comprising the steps of:
judging the availability of current configuration data of all information blocks, wherein the information blocks comprise a scheduling block and a system information block;
when the configuration data is available and the system information block scheduling fails, determining the required scheduling blocks again according to the system information block scheduling scheme with unavailable configuration data, determining the relevant scheduling information of each scheduling block and each system information block, and providing the relevant scheduling information to the user terminal;
when the configuration data is unavailable, determining a required scheduling block according to a system information block scheduling scheme with unavailable configuration data, determining relevant scheduling information of each scheduling block and each system information block, and providing the relevant scheduling information to a user terminal;
wherein the scheduling scheme for the system information block with unavailable configuration data comprises:
calculating the repetition period of a system information block corresponding to a set scheduling block according to the repetition period of each scheduling block and the parameter value of the scheduling block, calculating the length of the set scheduling block according to the repetition period, determining the set scheduling block as a required scheduling block when the length of the set scheduling block is less than or equal to the length of a broadcast channel BCH transmission block, and otherwise, increasing the number of the set scheduling blocks and recalculating the length of the set scheduling block until a proper scheduling block is found, wherein the set scheduling block comprises: one or more of a main system information block (MIB), a first scheduling block (SB1), and a second scheduling block (SB 2).
2. The method of claim 1, wherein the scheduling block comprises a main system information block (MIB), a first scheduling block (SB1), and a second scheduling block (SB 2).
3. The method of claim 2, wherein the configuration data includes a repetition period and a number of segments.
4. The method of claim 3, wherein the availability of the configuration data is determined according to whether one-half of a maximum repetition period of all the information blocks is not less than a total number of System Frame Numbers (SFN) occupied by each system information block and each scheduling block in the maximum repetition period, and if not, the configuration data is determined to be available; otherwise, judging that the configuration data is unavailable.
5. The method of claim 4, wherein when the configuration data is available, the total length of the scheduling information of the system information block corresponding to the set scheduling block is calculated according to the repetition period of each system information block, and the required scheduling block is determined according to the total length of the scheduling information;
determining scheduling information of each information block according to the repetition period of each system information block, wherein the determining of the scheduling information of each information block refers to searching the determined scheduling block and the vacant position of each system information block in the corresponding repetition period in a System Frame Number (SFN) sequence, marking the vacant position as occupied when the vacant position is determined as the initial position of the information block, searching the vacant position of a subsequent segment in the corresponding repetition period of each information block according to the vacant position, and marking the searched vacant position as occupied.
6. The method of claim 5, wherein when the set scheduling block is MIB, when a total length of scheduling information of all system information blocks is less than or equal to a difference between a length of a broadcast channel BCH transport block and a set value, determining that the scheduling block only requires MIB; otherwise, the set scheduling block is updated to MIB and SB1, and the required scheduling block is determined by calculating the total length of scheduling information of the remaining System Information Blocks (SIBs) except for the scheduling information accommodated in MIB.
7. The method of claim 6, wherein when the set scheduling blocks are the MIB and the SB1, it is determined that the scheduling blocks require the MIB and the SB1 when a total length of scheduling information of remaining SIBs, excluding scheduling information accommodated in the MIB, is less than or equal to a length of a broadcast channel BCH transport block; otherwise, the set scheduling blocks are updated to MIB, SB1, and SB2, and the required scheduling blocks are determined by calculating the total length of scheduling information of the remaining SIBs except for the scheduling information accommodated in MIB and SB 1.
8. The method of claim 7, wherein when the set scheduling blocks are MIB, SB1, and SB2, it is determined that the scheduling blocks require MIB, SB1, and SB2 when the total length of scheduling information of the remaining SIBs excluding the scheduling information accommodated in MIB and SB1 is less than or equal to the length of broadcast channel BCH transport blocks, and otherwise, it is determined that the scheduling blocks are MIB, SB1, and SB2, and SB1 and/or SB2 are to be segmented.
9. The method of claim 1, wherein determining the scheduling information of each information block refers to searching for a scheduling block and a null of each system information block in its corresponding repetition period in a System Frame Number (SFN) sequence, and marking the null as 'occupied' when determining the null as an initial position of the information block, and searching for a null of a subsequent segment in the corresponding repetition period of each information block according to the null, and marking the searched null as 'occupied'.
10. The method of claim 1, wherein one-half of the system information block repetition period is no less than a sum of a number of System Frame Numbers (SFN) occupied by scheduling blocks within the repetition period of a system information block and a total number of System Frame Numbers (SFN) occupied by all system information blocks.
11. An apparatus for scheduling system information blocks in a UMTS system, comprising:
the resource management unit is used for managing configuration data of each information block, and each information block comprises a scheduling block and a system information block;
the judging unit is used for judging the availability of the current configuration data of each information block and outputting the judgment result to the scheduling unit;
the scheduling unit is used for determining the required scheduling blocks according to the scheduling scheme of the system information blocks with unavailable configuration data again and determining the relevant scheduling information of each scheduling block and each system information block when the configuration data is available and the scheduling of the system information blocks fails, and when the configuration data is unavailable, determining the required scheduling blocks according to the scheduling scheme of the system information blocks with unavailable configuration data and determining the relevant scheduling information of each scheduling block and each system information block;
a sending unit, configured to provide the relevant scheduling information to a user terminal;
when the configuration data is unavailable, the scheduling unit is further configured to calculate a repetition period of a system information block corresponding to a set scheduling block according to the repetition period of each scheduling block and a scheduling block parameter value, calculate the length of the set scheduling block according to the repetition period, determine the set scheduling block as a required scheduling block when the length of the set scheduling block is less than or equal to the length of a broadcast channel BCH transmission block, otherwise, increase the number of the set scheduling blocks, and recalculate the length of the set scheduling block until a suitable scheduling block is found, where the set scheduling block includes: one or more of a main system information block (MIB), a first scheduling block (SB1), and a second scheduling block (SB 2).
12. The apparatus according to claim 11, wherein the determining unit determines the availability of the configuration data according to whether one-half of a maximum repetition period of all information blocks is not less than a total number of system frame numbers SFN occupied by each system information block and scheduling block in the maximum repetition period, and if not, determines that the configuration data is available; otherwise, judging that the configuration data is unavailable.
13. The apparatus of claim 12, wherein the scheduling unit calculates a total length of scheduling information of a system information block corresponding to a set scheduling block according to a repetition period of each system information block when the configuration data is available, and determines a required scheduling block according to the total length of the scheduling information; and determining scheduling information of each information block according to the repetition period of each system information block, wherein the determining of the scheduling information of each information block refers to searching the determined scheduling block and the vacancy of each system information block in the corresponding repetition period in a System Frame Number (SFN) sequence, marking the vacancy as occupied when the vacancy is determined as the initial position of the information block, searching the vacancy of a subsequent segment in the repetition period corresponding to each information block according to the vacancy, and marking the searched vacancy as occupied.
14. The apparatus of claim 13, wherein when the set scheduling block is MIB, the scheduling unit determines that the scheduling block only needs MIB when a total length of scheduling information of all system information blocks is less than or equal to a difference between a length of a broadcast channel BCH transport block and a set value; otherwise, the set scheduling block is updated to MIB and SB1, and the required scheduling block is determined by calculating the total length of the scheduling information of the remaining SIBs except the scheduling information accommodated in MIB.
15. The apparatus of claim 14, wherein when the set scheduling blocks are MIB and SB1, the scheduling unit determines that a scheduling block requires MIB and SB1 when the total length of scheduling information of the remaining SIBs, excluding the scheduling information contained in MIB, is less than or equal to the length of a broadcast channel BCH transport block; otherwise, the set scheduling blocks are updated to MIB, SB1, and SB2, and the required scheduling blocks are determined by calculating the total length of scheduling information of the remaining SIBs except for the scheduling information accommodated in MIB and SB 1.
16. The apparatus of claim 15, wherein when the set scheduling blocks are MIB, SB1, and SB2, it is determined that the scheduling blocks require MIB, SB1, and SB2 when the total length of scheduling information of the remaining SIBs except for the scheduling information accommodated in MIB and SB1 is less than or equal to the length of a broadcast channel BCH transport block, and otherwise, it is determined that the scheduling blocks are MIB, SB1, and SB2, and SB1 and/or SB2 are to be segmented.
17. The apparatus of claim 11, wherein the scheduling unit, when calculating the repetition period of the system information block, one-half of the repetition period of the system information block is no less than a sum of a number of System Frame Numbers (SFN) occupied by the scheduling block within the repetition period of the system information block and a total number of System Frame Numbers (SFN) occupied by all system information blocks.
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