CN101035085A - Scheduling method and device for the high-speed uplink packet access technology - Google Patents
Scheduling method and device for the high-speed uplink packet access technology Download PDFInfo
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Abstract
The invention relates to the wireless communication field, disclosing a scheduling method and device of supporting high-speed uplink packet access (HSUPA) technique, improving scheduling performance of Node B. In the invention, at the initial time of a RTWP (Received Total Wide band Power) measuring cycle, and according to the RTWP measured value, calculating cell uplink load; in the RTWP measuring cycle, regularly updating the cell uplink load; according to the updated cell unlink load, making HSUPA scheduling. And the invention also provides a scheduling device for HSUPA, comprising calculating module, updating module and scheduling module. And the invention can shorten the cycle of updating cell unlink load, and improve cell uplink load estimating realtimeness so as to improve HSUPA scheduling performance.
Description
Technical Field
The invention relates to the field of wireless communication, in particular to a scheduling technology of a high-speed uplink packet access technology.
Background
HSUPA (High Speed Uplink Packet Access-High Speed Uplink Packet Access) is another important new characteristic in WCDMA (Wide-band Code development multi-Access), and introduces technologies such as Uplink data inner loop acknowledgement mechanism between UE (User Equipment-User terminal) and Node B (WCDMA system base station), HARQ (Hybrid Automatic Repeat Request-Hybrid Automatic Repeat), MAC-E (media Access layer entity handling E-DCH), scheduling, improving capacity limit capability of physical channel available for users, and short frame mechanism, compared with the original WCDMA R99 characteristic. An uplink data inner ring confirmation mechanism between the UE and the Node B changes the original mode that only RNC (Radio Network Controller-wireless Network Controller) can confirm, reduces the confirmation time delay of data and improves the transmission efficiency of an air interface; the HARQ technology enhances the effect of data combination of a receiving party (Node B) and improves the retransmission gain; MAC-e scheduling distributes and adjusts the maximum sending authorization of each user through Node B (the adjustment granularity is the transmission time interval), and the change situation of the cell uplink load is fed back quickly to guide the user to authorize and distribute, thereby better realizing the uplink resource sharing among users; the short frame mechanism introduces 10ms or even 2ms short frames, reduces the data air interface time delay, improves the user experience, and can better adapt to the application occasion of the rapid change of the cell uplink load.
In the above-mentioned HSUPA basic new technology, MAC-e scheduling is one of the key technologies. The core idea of MAC-e scheduling is to measure the cell uplink load and then allocate the maximum grant available for each UE according to its application and its priority. Therefore, the method can accurately and timely measure the uplink load of the cell, and is the key for realizing MAC-e scheduling. In the prior art, the uplink load of the WCDMA system cell can be determined by the formula etaUL＝1-(PN/RTWP), where RTWP (Received Total Wide-band Power-Total Received Bandwidth Power) is the sum of the powers in the Node B Received Bandwidth, PNAnd the uplink background noise is RTWP when the cell is idle. WCDMA R99 already supports RTWP measurements, which are done by Node B. The Node B takes the RTWP measured value as the input of the Node B for calculating the uplink load of the cell, the uplink load is directly calculated through the formula, and MAC-e scheduling is carried out.
In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art: since WCDMA R99 supports only 100ms RTWP measurement, Node B typically supports only 100ms RTWP measurement, whereas in HSUPA, 10ms tti (Transmit Time Interval-transmission Time Interval) is employed to reduce transmission delay. The period of Node B scheduling is designed according to TTI, so the period of Node B scheduling is also 10 ms. If the uplink load calculated according to the RTWP measured value is used as the input of Node B scheduling, the period is 100 ms. Therefore, the prior art cannot reflect the uplink load condition of the cell in time, and has low real-time performance and poor scheduling effect.
Disclosure of Invention
The embodiment of the invention aims to solve the main technical problems of improving the real-time performance of HSUPA scheduling and improving the scheduling effect.
In order to solve the above technical problem, an embodiment of the present invention provides a scheduling method for high speed uplink packet access technology HSUPA, including the following steps:
calculating the uplink load of the cell according to the RTWP measured value at the initial time of the RTWP measuring period of the total received bandwidth power;
updating the uplink load of the cell at regular time in the RTWP measurement period;
and performing HSUPA scheduling according to the updated uplink load of the cell.
The embodiment of the invention also provides a scheduling device of high speed uplink packet access technology HSUPA, which comprises:
a calculation module: at the initial moment of the RTWP measurement period, calculating the uplink load of the cell according to the RTWP measurement value, and sending the uplink load to an updating module;
an update module: the system is used for updating the cell uplink load at regular time in the RTWP measurement period and sending an updated value of the cell uplink load to a scheduling module;
a scheduling module: and the system is used for receiving the update value of the cell uplink load sent by the update module and carrying out HSUPA scheduling according to the update value of the cell uplink load.
The embodiment of the invention has the following beneficial effects: in the embodiment of the invention, the cell uplink load is updated regularly in the RTWP measurement period, and HSUPA scheduling is carried out on the basis of the updated cell uplink load, so that the problem that the HSUPA scheduling cannot reflect the change of the cell uplink load in time is solved, the real-time performance of the HSUPA scheduling is improved, and the scheduling effect is improved.
Drawings
Fig. 1 is a flowchart of a scheduling method of a high speed uplink packet access technology according to an embodiment of the present invention;
fig. 2 is a block diagram of a scheduling apparatus of a high speed uplink packet access technology according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
A first embodiment of the embodiments of the present invention relates to a scheduling method of a high speed uplink packet access technology, and the embodiments of the present invention are described by taking a WCDMA system as an example, but not limited thereto.
The specific flow is shown in figure 1.
Step 101: at the initial time of the RTWP measurement period, calculating the uplink load of the cell according to the RTWP measurement value;
in this embodiment, an RTWP measurement period of 100ms is taken as an example for description. The WCDMA system outputs timing signals every 100ms at regular time, the Node B obtains RTWP measured value of a Cell and calculates Cell UL Load BasedRwp.
The cell uplink load can be calculated by formula etaUL＝1-(PN/RTWP), where RTWP (Received TotalWide-band Power-total Received Bandwidth Power) is the sum of the Power in the Node B Received Bandwidth, PNAnd the uplink background noise is RTWP when the cell is idle. Calculating the cell uplink load etaULRecorded as Cell UL Load Based Rwpp.
Step 102: calculating the sum of uplink loads of all user terminals UE in a cell at the initial moment of an RTWP measurement period;
and calculating the uplink Load sum sigma eta of all the UE in the Cell at the initial moment of the RTWP measurement period, and recording the uplink Load sum sigma eta as Cell _ UE _ UL _ Load _ 0.
There may be multiple methods for calculating the uplink load and Σ η of all UEs in a cell, and one of the methods may be:
1) calculating the uplink total signal-to-noise ratio of the UE
SIRDPCCH: a signal-to-interference ratio estimate for DPCCH (Dedicated Physical Control Channel);
the amplitude ratio between E-DPCCH (E-DCH differentiated Physical Control Channel-enhanced Dedicated Physical Control Channel) and DPCCH is specified by high-level signaling;
2) Calculating the load eta of the UE in the cell on the basis of the uplink total signal-to-noise ratio of the UE
3) And summing the uplink loads eta of all the UE in the cell to obtain the uplink loads and sigma eta of all the UE in the cell.
Step 103: setting a 10ms updating period;
in the embodiment of the present invention, in the RTWP measurement period, the system sets a smaller update period, which may be 10ms, 2ms or other set values, for simplicity, the update period is 10ms in this embodiment, so a 10ms timer is set.
Step 104: and when the updating period arrives, calculating the uplink Load sum of all the UE of the Cell at the time of the updating period, and recording the uplink Load sum as Cell _ UE _ UL _ Load _ N.
The calculation method of the uplink Load sum of all the UEs is the same as the calculation method in step 102, and N in the uplink Load sum Cell _ UE _ UL _ Load _ N is a natural number from 1 to 9.
Step 105: and calculating the offset of uplink Load sum of all UE in the Cell when the arrival time of the updating period and the initial time of the RTWP measuring period, and recording the offset as Cell UE UL Load offset.
Cell UE UL Load offset＝Cell_UE_UL_Load_N-Cell_UE UL_Load_0。
Step 106: based on the Cell uplink Load at the initial time of the RTWP measurement period, adding offset Cell UE ULload offset to obtain the Cell uplink Load at the time of the update period, and recording the uplink Load as Cell UL Load current;
step 107: and performing HSUPA scheduling according to the updated cell uplink load.
Since the HSUPA scheduling is done based on Cell UL Load current, which is exemplified by HSUPA of WCDMA. By repeatedly executing the steps of updating the cell uplink load (steps 104 to 106), the 1 st to 9 th 10ms uplink load within the 100ms period can be obtained, and the Node B scheduling is completed based on the uplink load at each 10ms time.
Step 108: and after the updating is repeatedly executed for 9 times and an RTWP measurement period is reached, entering the next RTWP measurement period and repeating the step 101.
In this embodiment, Cell _ UE _ UL _ Load _0 is used as a basis to calculate Cell UE UL Load offset from the update period arrival time to the initial time of the RTWP measurement period, and then Cell UL Load Based RTWP is used as a basis to calculate updated Cell uplink Load.
In addition, the Cell UE UL Load offset in the 10ms update period can be calculated based on the Cell _ UE _ UL _ Load _ (N-1) in the previous update period, and then the new Cell uplink Load can be calculated based on the Cell UL Load current in the previous update period. The steps of the scheduling method for realizing the high speed uplink packet access technology by adopting the method are basically the same as the steps of the method implemented in the embodiment, except that the steps 105 and 106 are different, and the steps 105 and 106 are changed into:
step 105': and calculating the offset of the uplink Load sum of all the UEs after 10ms of one updating period, and recording the offset as Cell UE UL Load offset'.
Cell UE UL Load offset ═ Cell _ UE _ UL _ Load _ N-Cell _ UE _ UL _ Load _ (N-1). When N is 1, Cell _ UE _ UL _ Load _ N-l is Cell _ UE UL _ Load _ 0.
Step 106': and adding the Cell uplink Load at the arrival time of the previous updating period and the offset to obtain the Cell uplink Load at the arrival time of the new updating period, and recording the uplink Load as Cell UL Load current _ N.
It can be understood that, if it is the first update period, the cell uplink load on which it is based is the cell uplink load at the initial time of the RTWP measurement period; if the updating period is other than the first updating period, the cell uplink load which is taken as the basis is the cell uplink load updated at the arrival time of the previous updating period.
After that, HSUPA scheduling is completed based on Cell UL Load current _ N.
In order to describe the technical solution of the present embodiment more clearly, the following is illustrated by a specific example:
suppose that Node B passes the acquired measurement value of 100msRTWP and the formula etaUL＝1-(PNRTWP) calculates that the uplink Load of the Cell at that time is 0.5, that is, Cell UL Load Based RTWP is 0.5, and calculates the uplink Load sum Σ η of all UEs in the Cell to be 3.5, that is, Cell _ UE _ UL _ Load _0 is 3.5, through the formula mentioned in step 102; when the update period reaches 10ms, calculating the sum of uplink loads of all UEs in the Cell at that time to be 3.8, that is, Cell _ UE _ UL _ Load _ N is 3.8; the offset of the sum of all UE uplink loads from the RTWP measurement time to the 10ms update period arrival time is Cell _ UE _ UL _ Load _ N-Cell _ UE _ UL _ Load _ 0-3.8-3.5-0.3, the new Cell uplink Load Cell UL Load current-RTWP + Cell UE UL Load offset-0.5 + 0.3-0.8, and the Node B completes scheduling Based on the new Cell uplink Load Cell UL Load current-0.8.
In this embodiment, the cell uplink load calculated by the RTWP measurement value is used as a basis, the cell uplink load is updated once every update period is reached, and the updated cell uplink load is used as a basis for HSUPA scheduling, so that the real-time performance of HSUPA scheduling is improved, and the scheduling effect is improved.
Besides updating the cell uplink load once every 10ms by setting the 10ms update period in the 100ms RTWP measurement period, a 2ms update period can be set, that is, the cell uplink load is updated once every 2 ms. The steps of the scheduling method for implementing the high speed uplink packet access technology by using the 2ms update period are substantially the same as those of the embodiment, and are not described herein again.
A second embodiment of the present invention relates to a scheduling apparatus of high speed uplink packet access technology, as shown in fig. 2:
the calculation module 201: at the initial time of the RTWP measurement period, calculating the cell uplink load according to the RTWP measurement value, and sending the cell uplink load to the update module 202;
the update module 202: the scheduling module 203 is used for updating the cell uplink load at regular time in the RTWP measurement period and sending the updated value of the cell uplink load to the scheduling module;
the scheduling module 203: for receiving the updated value of the cell uplink load sent by the updating module 202, and performing HSUPA scheduling according to the updated value of the cell uplink load.
The update module 202 further includes:
the saving unit 2021: the system comprises a base station, a base station and a terminal, wherein the base station is used for storing cell uplink load at the initial moment of an RTWP (real time programmable) measurement period and updated cell uplink load;
load and calculation unit 2022: the method is used for calculating the uplink load sum of all UE in a cell at the initial moment of an RTWP measurement period, and calculating the uplink load sum of all UE in the cell when an update period arrives;
offset amount calculation unit 2023: the load and offset calculating unit 2022 is configured to calculate the uplink load and offset of all UEs in the cell at the time when the update period reaches the initial time of the RTWP measurement period;
load update unit 2024: the scheduling module 203 is configured to add the offset calculated by the offset calculating unit 2023 and the cell uplink load at the initial time of the RTWP measurement period stored in the storage unit 2021 to obtain an updated cell uplink load, and send the updated cell uplink load to the scheduling module 203.
Alternatively, the update module 202 includes:
first saving unit 2025: the cell uplink load used for saving the initial moment of the RTWP measurement period;
second saving unit 2026: used for saving the updated cell uplink load;
load and calculation unit 2027: the method is used for calculating the uplink load sum of all UE in a cell at the initial moment of an RTWP measurement period, and calculating the uplink load sum of all UE in the cell when an update period arrives;
offset amount calculation unit 2028: the load and offset calculating unit 2027 is configured to obtain uplink loads of all UEs in the cell and an offset in an update period;
load update unit 2029: when the update cycle is the first update cycle, the scheduling module 203 is configured to add the offset calculated by the offset calculation unit 2023 and the cell uplink load stored in the first storage unit 2025 to obtain a cell uplink load updated in the update cycle, and send the cell uplink load updated in the update cycle to the first storage unit 2025; when the update period is another update period, the scheduling module 203 is configured to add the offset to the cell uplink load stored in the second storage unit 2026 to obtain the cell uplink load updated by the update period, and send the cell uplink load updated by the update period to the scheduling module.
In the embodiment of the invention, the cell uplink load is regularly updated by taking a smaller time interval as an updating period in the RTWP measuring period, so that the real-time performance of the cell uplink load estimation is improved, and the scheduling performance of the high-speed uplink packet access technology is improved.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A scheduling method of high speed uplink packet access technology HSUPA is characterized by comprising the following steps:
calculating the uplink load of the cell according to the RTWP measured value at the initial time of the RTWP measuring period of the total received bandwidth power;
updating the cell uplink load at regular time in the RTWP measurement period;
and performing HSUPA scheduling according to the updated cell uplink load.
2. The scheduling method of high speed uplink packet access technology HSUPA according to claim 1, wherein the RTWP measurement period comprises a plurality of update periods, and the cell uplink load is updated periodically in units of the update periods.
3. The method for scheduling high speed uplink packet access technology, HSUPA, according to claim 2, wherein the step of updating the cell uplink load periodically comprises:
calculating the sum of uplink loads of all user terminals UE in the cell at the initial moment;
when a new updating period arrives, calculating the uplink load sum of all UE of the cell at the moment, and calculating the uplink load sum of all UE of the cell and the offset of all UE of the cell in the updating period on the basis of the uplink load sum of all UE of the cell at the moment of arriving at the previous updating period; when the new updating period is the first updating period, the uplink load sum of all UE of the cell at the time when the previous updating period reaches is the uplink load sum of the cell at the initial time;
adding the cell uplink load at the time of the previous update period and the offset to obtain the cell uplink load at the time of the new update period; and when the new updating period is the first updating period, the cell uplink load at the time when the previous updating period reaches is the cell uplink load at the initial time.
4. The method for scheduling high speed uplink packet access technology, HSUPA, according to claim 2, wherein the step of updating the cell uplink load periodically comprises:
calculating the sum of uplink loads of all user terminals UE in the cell at the initial moment;
when the updating period is up, calculating the sum of uplink loads of all UE in the cell at the moment;
calculating the uplink loads and offsets of all UE of the cell at the time of the update period and the initial time;
and adding the offset to the cell uplink load at the initial moment to obtain the cell uplink load at the moment of the updating period.
5. The method for scheduling high speed uplink packet access technology, HSUPA, according to claim 3 or 4, wherein the step of calculating the sum of the uplink loads of all UEs in the cell comprises:
calculating the uplink total signal-to-noise ratio of each UE in the cell;
calculating the uplink load of each UE in the cell according to the uplink total signal-to-noise ratio;
and summing up uplink loads of all the UE in the cell.
6. The scheduling method of high speed uplink packet access technology, HSUPA, according to any of claims 1-4, characterized in that the measurement period of RTWP is 100ms and the update period is 10ms or 2 ms.
7. A scheduling apparatus of high speed uplink packet access technology HSUPA, comprising:
a calculation module: at the initial moment of the RTWP measurement period, calculating the uplink load of the cell according to the RTWP measurement value, and sending the uplink load to an updating module;
an update module: the system is used for updating the cell uplink load at regular time in the RTWP measurement period and sending an updated value of the cell uplink load to a scheduling module;
a scheduling module: and the system is used for receiving the update value of the cell uplink load sent by the update module and carrying out HSUPA scheduling according to the update value of the cell uplink load.
8. The scheduling apparatus of high speed uplink packet access technology, HSUPA, according to claim 7, further comprising:
a dividing module: the RTWP measurement period is divided into a plurality of updating periods;
and the updating module is used for updating the cell uplink load at regular time by taking the updating period divided by the dividing module as a unit.
9. The scheduling apparatus of high speed uplink packet access technology, HSUPA, according to claim 8, wherein the updating module includes:
a first saving unit: the cell uplink load used for saving the initial time is stored;
a second holding unit: used for saving the updated cell uplink load;
load and calculation unit: the uplink load sum of all the UE of the cell at the initial moment is calculated, and when the updating period is reached, the uplink load sum of all the UE of the cell is calculated;
an offset amount calculation unit: the load calculation unit is used for calculating the load of the UE in the cell and the offset of the UE in the cell in the updating period;
a load update unit: when the update cycle is the first update cycle, the scheduling module is configured to add the offset and the cell uplink load stored in the first storage unit to obtain a cell uplink load updated by the update cycle, and send the cell uplink load updated by the update cycle to the scheduling module; and when the update cycle is other update cycles, the scheduling module is configured to add the offset and the cell uplink load stored in the second storage unit to obtain a cell uplink load updated by the update cycle, and send the cell uplink load updated by the update cycle to the scheduling module.
10. The scheduling apparatus of high speed uplink packet access technology, HSUPA, according to claim 8, wherein the updating module includes:
a storage unit: the uplink load of the cell at the initial moment and the updated uplink load of the cell are saved;
load and calculation unit: the uplink load sum of all the UE of the cell at the initial moment is calculated, and when the updating period is reached, the uplink load sum of all the UE of the cell is calculated;
an offset amount calculation unit: the load calculation unit is used for calculating the load sum offset of all UE uplink loads of the cell when the update period reaches the time and the initial time according to the load sum calculation result of the calculation unit;
a load update unit: and the scheduling module is used for adding the offset and the cell uplink load at the initial moment stored in the storage unit to obtain an updated cell uplink load, and sending the updated cell uplink load to the scheduling module.
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| CNA2007100975995A CN101035085A (en) | 2007-04-28 | 2007-04-28 | Scheduling method and device for the high-speed uplink packet access technology |
| PCT/CN2008/070729 WO2008131672A1 (en) | 2007-04-28 | 2008-04-16 | Realization method and apperatus for mac-e scheduling |
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| WO2009155740A1 (en) * | 2008-06-23 | 2009-12-30 | 中兴通讯股份有限公司 | A sector based dispatching method for the high speed uplink packet access service and the system thereof |
| WO2010145600A1 (en) * | 2009-06-29 | 2010-12-23 | 中兴通讯股份有限公司 | Method and system for controlling uplink rate |
| WO2010149095A1 (en) * | 2009-12-31 | 2010-12-29 | 中兴通讯股份有限公司 | Method and device for assigning authentication of a high speed uplink packet access (hsupa) network |
| CN101765122B (en) * | 2008-12-22 | 2012-02-01 | 鼎桥通信技术有限公司 | Scheduling method |
| CN101790237B (en) * | 2009-01-24 | 2012-06-27 | 鼎桥通信技术有限公司 | Space division multiplexing method of shared channel in multichannel HSUPA system |
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| JP2006115236A (en) * | 2004-10-14 | 2006-04-27 | Matsushita Electric Ind Co Ltd | Base station equipment |
| CN1905754B (en) * | 2005-07-19 | 2010-09-08 | 三星电子株式会社 | System and method for scheduling uplink in a communication system |
| CN1933352B (en) * | 2005-12-07 | 2010-04-21 | 上海华为技术有限公司 | Cell load dispatching method |
| CN1863018B (en) * | 2006-01-19 | 2011-01-19 | 华为技术有限公司 | Load estimating method of enhanced uplink and load estimating method of WCDMA uplink |
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| WO2010149095A1 (en) * | 2009-12-31 | 2010-12-29 | 中兴通讯股份有限公司 | Method and device for assigning authentication of a high speed uplink packet access (hsupa) network |
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| WO2008131672A1 (en) | 2008-11-06 |
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