WO2008131672A1

WO2008131672A1 - Realization method and apperatus for mac-e scheduling

Info

Publication number: WO2008131672A1
Application number: PCT/CN2008/070729
Authority: WO
Inventors: Dong Zheng
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-04-28
Filing date: 2008-04-16
Publication date: 2008-11-06
Also published as: CN101035085A

Abstract

A method and apparatus for MAC-e scheduling are disclosed. The method includes steps as below: during the RTWP measurement period, executing the MAC-e scheduling based on the periodically refreshed cell uplink load. The apparatus includes a refreshing module which is used for refreshing the cell uplink load periodically during the RTWP measurement period and a scheduling module, which is used for executing the MAC-e scheduling based on the periodically refreshed cell uplink load.

Description

Method and device for implementing MAC-e scheduling

This application claims priority to Chinese Patent Application No. 200710097599.5, entitled "Scheduling Method and Apparatus for High Speed Uplink Packet Access Technology", filed on April 28, 2007, the entire contents of which are hereby incorporated by reference. The citations are incorporated herein by reference.

Ϊ Technical field

The present invention relates to the field of wireless communications, and in particular, to a MAC-e (media access layer entity handling E-DCH (Enhanced Dedicated Channel)) scheduling implementation technology. Background technique

HSUPA (High Speed Uplink Packet Access)

) is another important new feature in WCDMA (Wide-Band Code Division Multiple Access). Compared with the original WCDMAR99 feature, HSUPA introduces an uplink data inner loop confirmation mechanism, HARQ (Hybrid Automatic Repeat Request), and a HARQ (Hybrid Automatic Repeat Request) between the UE (User Equipment) and the Node B (WCDMA base station). MAC-e scheduling, techniques for increasing the capacity limit of physical channel available to users, and short frame mechanisms. Where UE

The uplink data inner loop confirmation mechanism between the Node B and the Node B changes the way that the RNC (Radio Network Controller) can confirm the data, which reduces the acknowledgement delay of the data and improves the air interface transmission efficiency; The HARQ technology enhances the effect of data combining by the receiver (Node B) and improves the retransmission gain. The MAC-e scheduling allocates and adjusts the maximum transmittable authorization of each user through the Node B quickly (adjusting the granularity to the transmission time interval). Upstream load changes

Fast feedback guides user authorization allocation to better achieve uplink resource sharing among users; short frame mechanism introduces short frames of 10ms or even 2ms, which reduces data air interface delay, improves user experience, and can better adapt to cell. Applications where the upstream load changes rapidly.

Among the technologies introduced by 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 according to the application of each UE and their priority.

Level, assigns each UE the maximum authorization that can be used. It can be seen that the accurate and timely measurement of the uplink load of the cell is the key to realizing MAC-e scheduling.

Currently, in a WCDMA system, the cell uplink load can be calculated by the formula; ^ = 1 - (PN / RTWP), where the RTWP (Received Total Wide-band Power) is within the receiving bandwidth of the Node B. The sum of power is the uplink noise and the RTWP when the cell is empty. WCDMA R99 is capable of supporting RTWP measurements. The measurement is completed by the Node B, and the Node 输入 inputs the RTWP measurement value into the above formula for calculating the uplink load of the cell, and the uplink load can be calculated, so that the MAC-e scheduling can be performed.

However, in the process of implementing the present invention, the inventors have found that at least the following problems exist in the prior art; Title: The uplink load condition of the cell cannot be reflected in time, the real-time performance is not high, and the scheduling effect is poor.

Summary of the invention

The main technical problem to be solved by the embodiments of the present invention is to provide a method and a device for implementing MAC-e scheduling, which can reflect the uplink load condition of the cell in time, has high real-time performance, and has good scheduling effect.

In order to solve the above technical problem, an embodiment of the present invention provides a MAC-e scheduling implementation method, including the following steps: periodically updating a cell uplink load in an RTWP measurement period; and periodically updating a cell uplink load to be ^ 5 out, perform MAC-e scheduling.

The embodiment of the present invention further provides an apparatus for implementing MAC-e scheduling, where the apparatus includes: an updating module: configured to periodically update a cell uplink load in an RTWP measurement period; and a scheduling module: configured to periodically update by using the update module Based on the uplink load of the cell, MAC-e scheduling is performed.

In the measurement period of the RTWP, the period of periodically updating the uplink load of the cell is smaller than the measurement period of the RTWP. Therefore, the embodiment of the present invention can respond to the uplink load of the cell in time, with high real-time performance and good scheduling effect.

DRAWINGS

1 is a flowchart of a method for implementing MAC-e scheduling according to Embodiment 1 of the present invention; and FIG. 2 is a structural diagram of an apparatus for implementing MAC-e scheduling according to Embodiment 2 of the present invention.

detailed description

A first embodiment of the present invention relates to a method for implementing MAC-e scheduling, including: periodically updating a cell uplink load in an RTWP measurement period; and performing MAC-e scheduling based on a periodically updated cell uplink load.

The RTWP measurement period may include multiple update periods, and the timing update of the cell uplink load may be: periodically update the cell uplink load by using the update period as a period.

Before the cell uplink load is periodically updated, the cell uplink load at the initial time of the RTWP measurement period and the uplink load sum of all UEs in the cell at the initial time of the RTWP measurement period may also be calculated. The step of periodically updating the uplink load of the cell may include: when the new update period arrives, calculate an uplink load of all UEs in the cell at the arrival time of the new update period; and uplink of all UEs in the cell at the arrival time of the previous update period The load sum is calculated, and the uplink load of all UEs in the cell and the offset in one update period are calculated, wherein when the new update period is the first update

During the period, the uplink load of all UEs in the cell at the time of arrival of the previous update period and the uplink load of all UEs in the cell at the initial time of the RTWP measurement period; the cell at which the previous update period arrives Adding an uplink load to the offset to obtain a cell uplink load of the new update period arrival time, where the previous update period arrives when the new update period is the first update period The uplink load of the cell is the initial time of the RTWP measurement period

) The uplink load of the cell.

The step of periodically updating the uplink load of the cell may include: when the new update period arrives, calculate an uplink load and an offset of all UEs in the cell based on an uplink load sum of all UEs in the cell at the initial time of the RTWP measurement period. And adding the offset to the cell uplink load at the initial time of the RTWP measurement period to obtain a cell uplink load at the arrival time of the new update period.

The calculating the uplink load sum of all the UEs in the cell may include: calculating an uplink overall signal to noise ratio of each UE in the cell; and calculating, according to the uplink overall signal to noise ratio, an uplink load of each UE in the cell; The uplink load of all UEs in the cell is summed to obtain an uplink load sum of all UEs in the cell.

The RTWP measurement period may be 100 ms, and the update period may be determined according to actual needs or requirements, for example: ^ is 10 ms or 2 ms.

The method of the embodiment of the present invention will be described in detail below with reference to FIG. First, it should be noted that although the following description will be made by taking the WCDMA system as an example, it is not limited thereto.

The specific process is shown in Figure 1.

Step 101: Calculate the cell uplink load according to the measured value of the RTWP at the initial moment of the RTWP measurement period.

In this embodiment, the RTWP measurement period is 100 ms as an example. The WCDMA system outputs a timing signal every 100 ms, and the Node B can obtain the RTWP measurement value of the cell according to the timing signal, and calculate the cell uplink load Cell UL Load Based Rtwp.

The uplink load of the cell can be calculated by the formula; / =l-(PW ?7 P), where RTWP (Received Total Wide-band Power) is the sum of the power in the receiving bandwidth of the Node B. It is the uplink noise floor and is also the RTWP when the cell is empty. The calculated cell uplink load is recorded as Cell UL Load Based Rtwp.

Step 102: Calculate an uplink load sum of all UEs in the cell at the initial moment of the RTWP measurement period. The uplink load and ∑η of all UEs in the cell at the initial time of the RTWP measurement period are calculated, and the uplink load and η are recorded as Cell_UE_UL_Load-0.

There are many ways to calculate the uplink load and ∑η of all UEs in a small area. One of the calculation methods can be:

1) Calculate the overall uplink signal-to-noise ratio of the UE, as follows:

SIR CH: Signal to interference ratio estimate of DPCCH (Dedicated Physical Control Channel);

Α: The amplitude ratio between E-DPCCH (E-DCH Dedicated Physical Control Channel) and DPCCH is specified by higher layer signaling;

* MC : Corresponding power of the E-DPDCH sent by the UE, ie SG (Scheduling

Grant-scheduling authorization), where is the amplitude ratio between E-DPDCH and DPCCH, and MC is the E-DPDCH code number.

2) calculating the load of the UE in the cell based on the uplink overall signal to noise ratio of the UE; 7 , as follows: N ₀

3) The uplink load of all UEs in the cell is summed to obtain the uplink load and ∑η of all UEs in the cell.

Step 103: Set the update period to 10ms.

In the embodiment of the present invention, during the RTWP measurement period, the WCDMA system sets a smaller update period, which may be 10ms, 2ms or other set values. For the sake of simplicity, the present embodiment takes the update period as 10ms as an example. Set the 10ms timer.

Step 104: When the update period arrives, calculate the uplink load sum of all UEs in the cell at the arrival time of the update period, and record the uplink load and record 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, the uplink load and

Cell—UE—UL—Load—The N in the N is a natural number from 1-9.

Step 105: Calculate an offset of an uplink load and an offset of all UEs in the cell when the update period arrives and the initial time of the RTWP measurement period, and record the offset as a Cell UE UL Load offset.

The specific calculation method may be: Cell UE UL Load offset = Cell - UE - UL - Load - N - i Cell - UE - UL - Load - 0.

Step 106: Based on the uplink load of the cell at the initial time of the RTWP measurement period, and adding the offset Cell UE UL Load offset, the uplink load of the cell at the update cycle time is obtained, and the uplink load is recorded as Cell UL Load current;

Step 107: Perform MAC-e scheduling according to the updated uplink load of the cell.

Because it is based on HSUPA of WCDMA, MAC-E scheduling is completed with Cell UL Load current of ^5. By repeatedly performing the step of updating the cell uplink load (step 104 to step 106), the uplink load of the 1st to 9th 101118 times in the 100ms period can be obtained, and the MAC-e scheduling is completed based on the uplink load of each 10ms time.

Step 108: After the update is repeated 9 times, an 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 arrival time of the update period is calculated. Cell_UE_UL_Load_ N and Cell UE UL Load offset between Cell_UE_UL_Load_ 0 at the initial time of the RTWP measurement period, and then calculate the updated cell based on Cell UL Load Based Rtwp Uplink load. In practical applications, there are also multiple ways to calculate the updated uplink load of the cell. For example, it can be based on Cell_UE_UL_Load_(Nl) of the previous update cycle.

Based on the calculation, the Cell UE UL Load offset in the 10 ms update period is calculated, and the Cell UL Load current of the previous update period is ^5, and the new cell uplink load is calculated. The steps of the scheduling method for implementing the high-speed uplink packet access technique by this method are basically the same as those of the method of the present embodiment, except that steps 105 and 106 are slightly changed.

Specifically, step 105 becomes:

Step 105': Calculate the uplink load and offset of all UEs in the cell after 10 ms of an update period, and record the offset as Cell UE UL Load offset'.

Specifically, it may be: Cell UE UL Load offset' = Cell - UE - UL - Load - N - Cell - UE - UL - Load - ( N - l ). When N=l, Cell_UE_UL_Load_N-l=Cell-UE UL-Load-0.

i Step 106 becomes:

Step 106': Add the uplink load of the cell at the arrival time of the previous update period to the offset, 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 basis of the cell uplink load as the calculation update period arrival time is the cell uplink load at the initial time of the RTWP measurement period; if it is the update period after the first update period, Then, the basis of the uplink load of the cell as the arrival time of the update cycle is the cell uplink load at the arrival time of the previous update cycle. Finally, MAC-e scheduling is performed based on Cell UL Load current-N.

In order to more clearly describe the technical solution of the embodiment, the following is given by a specific example;

It is assumed that the Node B calculates that the uplink load of the cell at the initial time of the RTWP measurement period is 0.5, that is, Cell UL Load Based Rtwp=0.5, and all the uplink loads in the cell are calculated by the formula mentioned in step 102, and ?1 is 3.5. That is, Cell-UE-UL-Load- 0=3.5. When the update period reaches 10 ms, it is calculated that the uplink load of all UEs in the cell at this time is 3.8, that is, Cell_UE_UL- Load_N=3.8. According to Cell_UE_UL_Load_N=3.8 and Cell_UE_UL_Load_ 0=3.5, the uplink load and offset of all UEs in the cell with the arrival time of the 10ms update period are obtained. Cell UE UL Load offset = Cell_UE— UL_Load_ N - Cell - UE - UL - Load - 0 = 3.8 - 3.5 = 0.3. According to Cell UL Load Based Rtwp=0.5 and Cell; UE UL Load offset =0.3, the cell uplink load of the 10ms update period arrival time is obtained. Cell UL Load current = Cell UL Load Based Rtwp + Cell UE UL Load offset=0.5+0.3= 0.8. Finally, Node B completes the 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 according to the measured value of the RTWP, the cell uplink load is updated every one update period, and the updated uplink load of the cell is used as the basis of the MAC-E scheduling, thereby improving the MAC. -E scheduling real-time, improving scheduling effects.

In addition to updating the cell uplink load every 10 ms by setting the 10 ms update period within the 1000 ms RTWP measurement period, the update period can also be set to 2 ms, that is, the uplink load is updated every 2 ms. The scheduling method of the high-speed uplink packet access technology is implemented by adopting the 2ms update period; the steps of the method are basically the same as those in this embodiment, and are not mentioned here.

It should be noted that, in this embodiment, steps 101, 102, and 103 have no necessary sequence relationship. For example, an update period of 10 ms may be preset, and after the system is started, the uplink load of the cell at the initial moment of the RTWP measurement period and the uplink load sum of all UEs in the cell are calculated. For example, the uplink load of all UEs in the cell at the initial time of the RTWP measurement period may be calculated first, and then the uplink load of the cell at the initial time of the RTWP measurement period is calculated. For another example, steps 101, 102, and 103 can be performed simultaneously. In short, the order relationship performed by these three steps can be arbitrary.

In addition to the foregoing scheduling method, the embodiment of the present invention further provides an implementation apparatus for MAC-e scheduling. The apparatus may include: an update module: configured to periodically update a cell uplink load during an RTWP measurement period; and a scheduling module: a cell uplink load that is periodically updated by the update module is 5; and performs MAC-e scheduling .

The device may further include: an update period setting module: configured to set the RTWP measurement period to a plurality of update periods, wherein the update module uses the update period set by the update period setting module as a period , periodically update the uplink load of the cell.

The apparatus may further include: a calculation module: configured to periodically update a cell uplink at the update module Before the load, the cell uplink load at the initial moment of the RTWP measurement period and the uplink load sum of all user terminals UE in the cell at the initial moment of the RTWP measurement period are calculated.

The update module may include: an uplink load and a calculation module, configured to calculate, when the new update period arrives, an uplink load of all UEs in the cell at the arrival time of the new update period; an uplink negative load and an offset And a calculation module, configured to calculate an uplink load of all UEs in the cell and an offset in an update period by using an uplink load of all UEs in the cell at the arrival time of the previous update period calculated by the uplink load and the calculation module And, when the new update period is the first update period, calculate, according to the uplink load sum of all UEs in the cell at the initial time of the RTWP measurement period calculated by the calculation module, calculate uplink of all UEs in the cell. a load and an offset in an update period; a cell uplink load calculation module, configured to calculate a cell uplink load of the previous update period arrival time and an offset calculated by the uplink load and offset calculation module Adding, obtaining a cell uplink load at the arrival time of the new update period, wherein when the new update period is During the first update period, the cell uplink load at the initial time of the RTWP measurement period calculated by the calculation module is added to the offset calculated by the uplink load and offset calculation module, to obtain the new update period to ; Up to the cell uplink load at the moment.

The update module may include: an uplink load and an offset calculation module, configured to: when a new update period arrives, based on an uplink load sum of all UEs in the cell at an initial time of the RTWP measurement period calculated by the calculation unit, Calculating an uplink load and an offset of all UEs in the cell; a cell uplink load calculation module, configured to calculate, by adding, the uplink load of the initial time of the RTWP measurement period calculated by the calculating unit, the uplink load and the offset The offset calculated by the module obtains the uplink load of the cell at the arrival time of the new update period.

The apparatus of the embodiment of the present invention will be described in detail below with reference to FIG. As shown in Figure 2: The calculation module 201: at the initial time of the RTWP measurement period, according to the measured value of the RTWP, calculate the cell uplink load, and send to the update module 202;

The update module 202 is configured to periodically update the cell uplink load in the RTWP measurement period, and send the updated value of the uplink load of the cell to the scheduling module 203;

The scheduling module 203 is configured to receive an update value of the uplink load of the cell sent by the update module 202, and perform MAC-E scheduling according to the updated value of the uplink load of the cell.

The update module 202 further includes: The saving unit 2021 is configured to save the cell uplink load of the initial time of the RTWP measurement period and the updated cell uplink load;

The load and calculation unit 2022 is configured to calculate an uplink load sum of all UEs of the cell at the initial time of the RTWP measurement period, and calculate an uplink load sum of all UEs of the cell when the update period arrives; the offset calculation unit 2023: The calculation result of the load and calculation unit 2022 calculates an offset of the uplink load sum of all UEs at the time when the update period arrives and the initial time of the RTWP measurement period;

The load update unit 2024 is configured to add an offset calculated by the offset calculation unit 2023 to an initial uplink cell load of the RTWP measurement period stored in the storage unit 2021, to obtain an updated uplink load of the cell, and Send to the scheduling module 203.

Alternatively, the update module 202 includes:

a first saving unit 2025: configured to save a cell uplink load at an initial time of the RTWP measurement period; and a second saving unit 2026: configured to save the updated cell uplink load;

The load and calculation unit 2027 is configured to calculate an uplink load sum of all UEs of the cell at the initial time of the RTWP measurement period, and calculate an uplink load sum of all UEs of the cell when the update period arrives;

The offset calculation unit 2028 is configured to obtain, according to the calculation result of the load and the calculation unit 2027, an uplink load of all UEs in the cell and an offset in an update period;

The load update unit 2029: when the update period is the first update period, the offset amount calculated by the offset calculation unit 2023 is added to the cell uplink load stored in the first storage unit 2025, Obtaining the uplink load of the cell after the update period is updated, and sending it to the scheduling module 203. When the update period is another update period, the offset is used to add the offset to the cell uplink load saved in the second storage unit 2026. The cell uplink load after the update period update is obtained and sent to the scheduling module 203.

In the measurement period of the RTWP, the embodiment uses the smaller time interval as the update period; periodically updates the uplink load of the cell, improves the real-time performance of the uplink load estimation of the cell, thereby improving the scheduling of the high-speed uplink packet access technology. performance.

It should be noted that each functional unit in the foregoing apparatus may be applied to the NodeB, and the functional units work in the NodeB in the same manner as in the foregoing apparatus, and details are not described herein again. In addition, since WCDMA R99 only supports RTWP measurement with a period of 100ms, Node B generally only supports RTWP measurement with a period of 100ms. In other words, WCDMA R99 technology generally only supports Node B scheduling with a period of 100ms. HSUPA or some other technologies generally use a 10ms TTI (Transmit Time Interval) to reduce transmission.

; Delay. Since the period for performing MAC-e scheduling is designed according to TTI, the period for performing MAC-e scheduling should be 10 ms. In the embodiment of the present invention, the period for updating the uplink load can be set to 10 ms, so that MAC-e scheduling can be performed every 10 ms, thereby satisfying the cycle requirement for performing MAC-e scheduling.

The above are only the preferred embodiments of the present invention and are not intended to limit the present invention.

Within the spirit and principles, any modifications, equivalent substitutions, improvements, etc., are intended to be included within the scope of the present invention.

Claims

Rights request

A method for implementing a MAC-e scheduling of a medium access layer entity for processing an enhanced channel E-DCH, comprising the steps of:

The cell uplink load is periodically updated during the total bandwidth of the received bandwidth RTWP measurement period; MAC-e scheduling is performed based on the uplink load of the cell after the timing update.

The method for implementing MAC-e scheduling according to claim 1, wherein the RTWP measurement period comprises a plurality of update periods, and periodically updating the uplink load of the cell is: Timing update of the uplink load of the cell.

The method for implementing MAC-e scheduling according to claim 1, wherein before the cell uplink load is periodically updated, the method further includes: calculating a cell uplink load at the initial time of the RTWP measurement period and the RTWP measurement period. The uplink load sum of all user terminals UE in the cell at the initial moment.

The method for implementing the MAC-e scheduling according to claim 3, wherein the step of periodically updating the uplink load of the cell includes:

When the new update period arrives, calculate all the cells in the cell at the arrival time of the new update cycle;

Uplink load of the UE and;

Calculating the uplink load of all UEs in the cell and the offset in an update period, where the new update period is the first During the update period, the uplink load of all UEs in the cell at the time when the previous update period arrives and the uplink load sum of all UEs in the cell at the initial time of the RTWP measurement period;

Adding a cell uplink load of the previous update period arrival time to the offset amount to obtain a cell uplink load of the new update period arrival time, where the new update period is the first update During the period, the cell uplink load at the arrival time of the previous update period is the RTWP; the cell uplink load at the initial time of the measurement period.

5. The method for implementing MAC-e scheduling according to claim 3, wherein the step of periodically updating the uplink load of the cell comprises:

When the new update period arrives, the uplink load sum of all UEs in the cell at the initial time of the RTWP measurement period is calculated, and the uplink load and offset of all UEs in the cell are calculated; Adding the uplink load of the cell at the initial time of the RTWP measurement period to the offset, to obtain a cell uplink load at the arrival time of the new update period.

The method for implementing MAC-e scheduling according to claim 4 or 5, wherein the step of calculating an uplink load of all UEs in the area includes:

Calculating the overall uplink signal-to-noise ratio of each UE in the cell;

Calculating, according to the uplink overall SNR, an uplink load of each UE in the cell; summing uplink loads of all UEs in the cell to obtain an uplink load sum of all UEs in the cell.

7. The method for implementing MAC-e scheduling according to claim 2, wherein the RTWP) measurement period is 100 ms, and the update period is 10 ms or 2 ms.

An apparatus for implementing MAC-e scheduling, comprising:

The update module is configured to: periodically update the cell uplink load in the RTWP measurement period; and the scheduling module is configured to perform MAC-e scheduling based on the uplink load of the cell that is periodically updated by the update module.

;

The apparatus for implementing MAC-e scheduling according to claim 8, further comprising: an update period setting module: configured to set the RTWP measurement period to a plurality of update periods, where The update module periodically updates the cell uplink load by using an update period set by the update cycle setting module as a cycle.

The device for implementing MAC-e scheduling according to claim 8, further comprising: a calculation module: configured to calculate an initial time of the RTWP measurement period before the update module periodically updates a cell uplink load The uplink load of the cell and the uplink load sum of all user terminals UE in the cell at the initial moment of the RTWP measurement period.

11. The apparatus for implementing MAC-e scheduling according to claim 10, wherein the update module comprises:

And an uplink load and calculation module, configured to calculate, when the new update period arrives, an uplink load sum of all UEs in the cell at the arrival time of the new update period;

And an uplink load and offset calculation module, configured to calculate an uplink load of all UEs in the cell according to an uplink load sum of all UEs in the cell at the arrival time of the previous update period calculated by the uplink load and the calculation module, and An offset within the update period, wherein when the new update period is During the first update period, based on the uplink load sum of all UEs in the cell at the initial time of the RTWP measurement period calculated by the calculation module, calculate an uplink load of all UEs in the cell and an offset in an update period;

a cell uplink load calculation module, configured to: uplink the cell at the time when the previous update cycle arrives; add the load to the offset calculated by the uplink load and the offset calculation module, to obtain the new update cycle arrival time The uplink load of the cell, wherein when the new update period is the first update period, the cell uplink load at the initial time of the RTWP measurement period calculated by the calculation module is calculated by the uplink load and offset calculation module The offsets are added to obtain the cell uplink load at the arrival time of the new update period.

12. The apparatus for implementing MAC-e scheduling according to claim 10, wherein the update module comprises:

And an uplink load and offset calculation module, configured to calculate an uplink of all UEs in the cell based on an uplink load sum of all UEs in the cell at an initial time of the RTWP measurement period calculated by the calculating unit when a new update period arrives Load and offset;

a cell uplink load calculation module, configured to add a cell uplink load at an initial time of the RTWP measurement period calculated by the calculation unit to an offset calculated by the uplink load and offset calculation module, to obtain a new update period arrival time The uplink load of the cell.