CN101035085A - Scheduling method and device for the high-speed uplink packet access technology - Google Patents

Abstract

The invention relates to the field of wireless communication, and discloses a scheduling method and device supporting the high-speed uplink packet access technology HSUPA, so that the scheduling performance of Node B can be improved. In the present invention, at the initial moment of the RTWP measurement period of the total receiving bandwidth power, the uplink load of the cell is calculated according to the measured value of RTWP; within the RTWP measurement period, the uplink load of the cell is regularly updated; and HSUPA scheduling is performed according to the updated uplink load of the cell . The invention also provides a scheduling device for high-speed uplink packet access technology, which includes a computing module, an updating module and a scheduling module. The present invention can shorten the update period of the uplink load of the cell, improve the real-time performance of the uplink load estimation of the cell, thereby improving the dispatching performance of the HSUPA.

Description

Scheduling method and device for high-speed uplink packet access technology

technical field

The invention relates to the field of wireless communication, in particular to the dispatching technology of the high-speed uplink packet access technology.

Background technique

HSUPA (High Speed Uplink Packet Access-High Speed Uplink Packet Access Technology) is another important new feature in WCDMA (Wide-band Code Devision Multiplke Access-Wideband Code Division Multiple Access), compared to the original WCDMA R99 feature, which introduces the uplink data inner loop confirmation mechanism between UE (User Equipment-user terminal) and Node B (WCDMA system base station), HARQ (Hybrid Automatic Repeat Request-hybrid automatic retransmission), MAC-e (processing The media access layer entity of E-DCH.) Scheduling, improving the physical channel capacity limit capability available to users, short frame mechanism and other technologies. The uplink data inner-loop confirmation mechanism between UE and Node B has changed the original method that can only be confirmed by RNC (Radio Network Controller-Radio Network Controller), which reduces the data confirmation delay and improves the air interface transmission efficiency; HARQ technology enhances the receiver (Node B) data combination effect and improves the retransmission gain; MAC-e scheduling allocates and adjusts the maximum transmittable authorization of each user through Node B quickly (adjustment granularity is the transmission time interval), and the cell The rapid feedback of changes in the uplink load guides user authorization allocation to better realize uplink resource sharing among users; the short frame mechanism introduces short frames of 10 ms or even 2 ms, which reduces data air interface delay and improves user experience. It can effectively adapt to the application occasions where the uplink load of the cell changes rapidly.

Among the basic new technologies of HSUPA mentioned above, MAC-e scheduling is one of the key technologies. The core idea of MAC-e scheduling is to measure the uplink load of the cell, and then assign the maximum grant that can be used to each UE according to the application of each UE and their priority. It can be seen that being able to accurately and timely measure the uplink load of a cell is the key to realizing MAC-e scheduling. In the current existing technology, the uplink load of a WCDMA system cell can be calculated by the formula η _UL =1-(P _N /RTWP), where RTWP (Received Total Wide-band Power-total power of received bandwidth) is the received bandwidth of Node B The sum of the power in , _PN is the uplink noise floor, and it is the RTWP when the cell is empty. WCDMA R99 already supports RTWP measurement, and the measurement is completed by Node B. Node B uses this RTWP measurement value as the input of Node B to calculate the uplink load of the cell, and directly calculates the uplink load through the above formula, and performs MAC-e scheduling.

In the process of realizing the present invention, the inventor finds that there are at least the following problems in the prior art: because WCDMA R99 only supports 100ms RTWP measurement, so Node B generally only supports 100ms RTWP measurement, and in HSUPA, adopted 10msTTI ( Transmit Time Interval-transmission time interval) to reduce transmission delay. The cycle of Node B scheduling is required to be designed according to TTI, so the cycle of Node B scheduling is also 10ms. If the uplink load calculated according to the RTWP measurement value is used as the input of Node B scheduling, the period is 100ms. Therefore, the existing technology cannot timely reflect the uplink load of the cell, the real-time performance is not high, and the scheduling effect is poor.

Contents of the invention

The main technical problem to be solved by the embodiments of the present invention is to improve the real-time performance of HSUPA scheduling and improve the scheduling effect.

In order to solve the above-mentioned technical problems, the embodiment of the present invention provides a scheduling method of the high-speed uplink packet access technology HSUPA, including the following steps:

At the initial moment of the RTWP measurement period of the total receiving bandwidth power, calculate the uplink load of the cell according to the measured value of RTWP;

During the RTWP measurement period, regularly update the uplink load of the cell;

HSUPA scheduling is performed according to the updated uplink load of the cell.

The embodiment of the present invention also provides a high-speed uplink packet access technology HSUPA scheduling device, the device includes:

Calculation module: at the initial moment of the RTWP measurement period, calculate the uplink load of the cell according to the measurement value of RTWP, and send it to the update module;

An update module: used to periodically update the uplink load of the cell within the RTWP measurement period, and send the updated value of the uplink load of the cell to the scheduling module;

Scheduling module: used to receive the update value of the uplink load of the cell sent by the update module, and perform HSUPA scheduling according to the update value of the uplink load of the cell.

Beneficial effects of the embodiment of the present invention: In the embodiment of the present invention, the uplink load of the cell is regularly updated within the RTWP measurement period, and HSUPA scheduling is performed based on the updated uplink load of the cell, so it overcomes that the HSUPA scheduling cannot respond to the cell in a timely manner. The problem of uplink load changes, thereby improving the real-time performance of HSUPA scheduling, and improving the scheduling effect.

Description of drawings

FIG. 1 is a flowchart of a scheduling method of the high-speed uplink packet access technology provided by Embodiment 1 of the present invention;

Fig. 2 is a structural diagram of a scheduling device for the high-speed uplink packet access technology provided by Embodiment 2 of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

The first embodiment of the embodiment of the present invention relates to the scheduling method of the high-speed uplink packet access technology. The embodiment of the present invention is described by taking the WCDMA system as an example, but it is not limited thereto.

The specific process is shown in Figure 1.

Step 101: at the initial moment of the RTWP measurement period, calculate the uplink load of the cell according to the measured value of the RTWP;

In this embodiment, the RTWP measurement period is 100 ms as an example for illustration. The WCDMA system regularly outputs a timing signal every 100ms, and the Node B obtains the measured value of the RTWP of the cell, and calculates the Cell UL Load BasedRtwp of the uplink load of the cell.

The uplink load of the cell can be calculated by the formula η _UL =1-(P _N /RTWP), where RTWP (Received TotalWide-band Power-total power of received bandwidth) is the sum of the power within the received bandwidth of Node B, and _PN is the uplink bottom Noise is the RTWP when the cell is no-load. Record the calculated cell uplink load η _UL as Cell UL Load Based Rtwp.

Step 102: Calculate the sum of uplink loads of all UEs in the cell at the initial moment of the RTWP measurement period;

Calculate the uplink load sum Ση of all UEs in the cell at the initial moment of the RTWP measurement period, and record the uplink load sum Ση as Cell_UE_UL_Load_0.

There are many ways to calculate the uplink load and Ση of all UEs in the cell, one of which can be:

1) Calculate the UE's overall uplink signal-to-noise ratio

$\frac{{\mathrm{<span\; class="notranslate">\; E.</span>}}_{\mathrm{<span\; class="notranslate">\; c</span>}}}{{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; SIR</span>}}_{\mathrm{<span\; class="notranslate">\; DPCCH</span>}}}{\mathrm{<span\; class="notranslate">\; 256</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>{<span\; class="notranslate">\; (</span>\frac{{\mathrm{<span\; class="notranslate">\; \&beta;</span>}}_{\mathrm{<span\; class="notranslate">\; ec</span>}}}{{\mathrm{<span\; class="notranslate">\; \&beta;</span>}}_{\mathrm{<span\; class="notranslate">\; c</span>}}}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{<span\; class="notranslate">\; (</span>\frac{{\mathrm{<span\; class="notranslate">\; \&beta;</span>}}_{\mathrm{<span\; class="notranslate">\; ed</span>}}}{{\mathrm{<span\; class="notranslate">\; \&beta;</span>}}_{\mathrm{<span\; class="notranslate">\; c</span>}}}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; *</span>\mathrm{<span\; class="notranslate">\; MC</span>}<span\; class="notranslate">\; )</span>$

SI _RDPCCH : DPCCH (Dedicated Physical Control Channel-Dedicated Physical Control Channel) signal-to-interference ratio estimate;

The amplitude ratio between E-DPCCH (E-DCH Dedicated Physical Control Channel-enhanced dedicated physical control channel) and DPCCH is specified by high-level signaling;

对应UE发送E-DPDCH的相对功率，也就是SG(Scheduling Grant-调度授权)；其中，

是E-DPDCH和DPCCH之间的幅度比值；MC是E-DPDCH码数。

Corresponding to the relative power of the UE sending E-DPDCH, that is, SG (Scheduling Grant-scheduling grant); where,

is the amplitude ratio between E-DPDCH and DPCCH; MC is the code number of E-DPDCH.

2) Calculate the load η of the UE in the cell on the basis of the UE's overall uplink signal-to-noise ratio

$\mathrm{<span\; class="notranslate">\; \&eta;</span>}<span\; class="notranslate">\; =</span>\frac{\frac{{\mathrm{<span\; class="notranslate">\; E.</span>}}_{\mathrm{<span\; class="notranslate">\; c</span>}}}{{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}}}{\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>\frac{{\mathrm{<span\; class="notranslate">\; E.</span>}}_{\mathrm{<span\; class="notranslate">\; c</span>}}}{{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}}}$

3) Sum up the uplink load η of all UEs in the cell to obtain the sum Ση of the uplink load of all UEs in the cell.

Step 103: set an update period of 10ms;

In the embodiment of the present invention, within the RTWP measurement period, the system sets a smaller update period, which can be 10ms, 2ms or other set values. For simplicity, this embodiment takes the update period as 10ms as an example, so set 10ms timer.

Step 104: When the update period arrives, calculate the sum of uplink loads of all UEs in the cell at the time of the update period, and record the sum of uplink loads as Cell_UE_UL_Load_N.

The calculation method of the uplink load sum of all 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 of 1-9.

Step 105: Calculate the offset between the uplink load sum of all UEs in the cell at the arrival time of the update period and the initial time of the RTWP measurement period, and record 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 uplink load of the cell at the initial moment of the RTWP measurement period, plus the offset Cell UE ULLoad offset, the uplink load of the cell at the time of the update period is obtained, and the uplink load is recorded as Cell UL Load current;

Step 107: Perform HSUPA scheduling according to the updated cell uplink load.

Because taking WCDMA HSUPA as an example, HSUPA scheduling is completed based on Cell UL Load current. By repeatedly executing the steps of updating the uplink load of the cell (step 104 to step 106), the uplink load of the first to ninth 10ms moments in the 100ms period can be obtained, and the Node B scheduling is completed based on the uplink load of each 10ms moment.

Step 108 : After the update is repeated nine times, one RTWP measurement cycle is reached, and then the next RTWP measurement cycle is entered, and step 101 is repeated.

In this embodiment, based on Cell_UE_UL_Load_0, the Cell UE UL Load offset is calculated from the arrival time of the update period to the initial time of the RTWP measurement period, and then the updated cell uplink load is calculated based on the Cell UL Load Based Rtwp.

In addition, based on the Cell_UE_UL_Load_(N-1) of the previous update period, the Cell UE UL Load offset within the 10ms update period can be calculated, and then the new cell uplink load can be calculated based on the Cell UL Load current of the previous update period. . Using this method to realize the scheduling method steps of the high-speed uplink packet access technology is basically the same as the method steps of this implementation, except that step 105 and step 106 are different, and step 105 and step 106 become:

Step 105': Calculate the offset of the sum of uplink loads of all UEs after an update period of 10 ms, and record 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=1, Cell_UE_UL_Load_N-1=Cell_UE_UL_Load_0.

Step 106': Add the uplink load of the cell at the arrival time of the previous update period to the offset to obtain the uplink load of the cell at the arrival time of the new update period, and record the uplink load as Cell UL Load current_N.

It can be understood that if it is the first update period, the uplink load of the cell as the basis is the uplink load of the cell at the initial moment of the RTWP measurement period; if it is an update period other than the first update period, it is used as the base cell The uplink load is the updated uplink load of the cell at the arrival time of the previous update period.

After that, HSUPA scheduling is completed based on Cell UL Load current_N.

In order to describe the technical solution of this embodiment more clearly, a specific example is used below to illustrate:

Assume that the Node B calculates the uplink load of the cell at this moment to be 0.5 through the obtained measured value of 100msRTWP and the formula η _UL =1-(P _N /RTWP), that is, Cell UL Load Based Rtwp=0.5, through step 102 The formula mentioned above calculates that the uplink load sum of all UEs in the cell is 3.5, that is, Cell_UE_UL_Load_0=3.5; when the update period reaches 10ms, the calculated uplink load sum of all UEs in the cell at this moment is 3.8, that is, Cell_UE_UL_Load_N=3.8; The offset of all UE uplink load sums from the RTWP measurement time to the 10ms update cycle arrival time is CellUE UL Load offset=Cell_UE_UL_Load_N-Cell_UE_UL_Load_0=3.8-3.5=0.3, and the new cell uplink load Cell UL Load current=Cell UL Load Based Rtwp+Cell UE UL Loadoffset=0.5+0.3=0.8, the Node B completes scheduling based on the new cell uplink load Cell UL Load current=0.8.

In this embodiment, based on the uplink load of the cell calculated by the RTWP measurement value, the uplink load of the cell is updated every time an update cycle is reached, and the updated uplink load of the cell is used as the basis of HSUPA scheduling, thereby improving the real-time performance of HSUPA scheduling and improving scheduling Effect.

In addition to updating the cell uplink load every 10ms by setting a 10ms update period within the 100ms RTWP measurement period, you can also set a 2ms update period, that is, update the cell uplink load every 2ms. The steps of the scheduling method for implementing the high-speed uplink packet access technology by adopting a 2ms update period are basically the same as those in this embodiment, and will not be repeated here.

The second embodiment of the implementation of the present invention relates to a scheduling device for high-speed uplink packet access technology, as shown in Figure 2:

Calculation module 201: at the initial moment of the RTWP measurement period, calculate the uplink load of the cell according to the measurement value of RTWP, and send it to the update module 202;

Update module 202: used to regularly update the uplink load of the cell within the RTWP measurement period, and send the updated value of the uplink load of the cell to the scheduling module 203;

Scheduling module 203: for receiving the updated value of the uplink load of the cell sent by the updating module 202, and performing HSUPA scheduling according to the updated value of the uplink load of the cell.

The update module 202 further includes:

Save unit 2021: used to save the cell uplink load at the initial moment of the RTWP measurement period and the updated cell uplink load;

Load sum calculation unit 2022: used to calculate the sum of uplink loads of all UEs in the cell at the initial moment of the RTWP measurement period, and calculate the sum of uplink loads of all UEs in the cell when the update period arrives;

Offset calculation unit 2023: used to calculate the offset of the uplink load sum of all UEs in the cell at the arrival time of the update period and the initial time of the RTWP measurement period according to the calculation result of the load sum calculation unit 2022;

Load update unit 2024: used to add the offset calculated by the offset calculation unit 2023 to the uplink load of the cell at the initial moment of the RTWP measurement cycle stored in the storage unit 2021 to obtain the updated uplink load of the cell, and send to the scheduling module 203.

Alternatively, update module 202 includes:

The first saving unit 2025: used to save the uplink load of the cell at the initial moment of the RTWP measurement period;

The second saving unit 2026: used to save the updated uplink load of the cell;

Load sum calculation unit 2027: used to calculate the sum of uplink loads of all UEs in the cell at the initial moment of the RTWP measurement period, and calculate the sum of uplink loads of all UEs in the cell when the update period arrives;

The offset calculation unit 2028: used to obtain the uplink load of all UEs in the cell and the offset within one update period according to the load and the calculation result of the calculation unit 2027;

Load update unit 2029: when the update period is the first update period, it is used to add the offset calculated by the offset calculation unit 2023 to the uplink load of the cell stored in the first storage unit 2025 to obtain an update The uplink load of the cell after the periodic update is sent to the scheduling module 203; when the update cycle is another update cycle, it is used to add the offset to the uplink load of the cell saved in the second storage unit 2026 to obtain the update The periodically updated cell uplink load is sent to the scheduling module 203 .

In the embodiment of the present invention, within the RTWP measurement period, the uplink load of the cell is regularly updated with a smaller time interval as the update period, which improves the real-time performance of the uplink load estimation of the cell, thereby improving the scheduling performance of the high-speed uplink packet access technology .

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention within.

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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