CN101686485B - Method for fetching high speed downlink packet access transmission throughput and system thereof - Google Patents

Abstract

The invention discloses a method for obtaining high-speed downlink packet access (HSDPA) transmission throughput, which is used to solve the complicated network simulation of the wireless network system after the HSDPA technology is introduced in the prior art, and obtain the HSDPA transmission throughput Inaccurate question. The method comprises: firstly, according to the obtained location information of at least one high-speed downlink packet access HSDPA user in the planned area, obtaining the pilot signal quality of each HSDPA user among the at least one HSDPA user, and then according to each HSDPA user According to the set scheduling strategy, select a set number of HSDPA users in each cell as scheduled HSDPA users for data transmission, and finally determine the HSDPA transmission throughput of the cell according to the location information of each scheduled HSDPA user in each cell quantity. The invention also discloses a network simulation system for obtaining HSDPA transmission throughput.

Description

Method and system for obtaining high-speed downlink packet access transmission throughput

technical field

The present invention relates to the technical field of wireless communication, in particular to a method and a system for obtaining high-speed downlink packet access (HSDPA, High Speed Downlink Packet Access) transmission throughput in network simulation.

Background technique

When planning a wireless network in a Code Division Multiple Access (CDMA, Code Division Multiple Access) system, considering the strong coupling between network coverage and network capacity caused by multiple access interference, it is necessary to plan the wireless network system Modeling, planning the capacity of the wireless network through simulation technology. Currently, wireless network planning software mostly adopts a static simulation method based on the theorem of large numbers for network simulation of capacity, and this simulation method has also been recognized by the industry. However, there is no mature method for the network simulation of the wireless network system after the HSDPA technology is introduced.

HSDPA technology is a downlink enhancement scheme proposed by the 5th edition of the 3rd Generation Partnership Project (3GPP Release5, 3rd Generation Partnership Project). The main goal of HSDPA is to support high-speed packet data services, and to obtain lower time delay, higher system throughput capacity and stronger quality of service (QoS, Quality of Service) when the data transmission rate is high. ensure. HSDPA technology mainly includes: adaptive code adjustment (AMC, Adaptive Code and Modulation) technology, hybrid retransmission (HARQ, Hybrid Automatic Retransmission Request) technology, fast packet scheduling (PS, Packet Scheduling).

Among them, the AMC technology matches the currently received signal quality or signal condition by changing the modulation and coding format. In this way, under the condition that the transmission power of the base station is constant, the network transmission capability can be maximized and the maximum network transmission throughput can be obtained. After adopting the AMC technology, the network can select the largest transmission block for transmission according to the channel quality under the condition of satisfying the transmission reliability, so that the network transmission rate reaches the maximum.

At the same time, the wireless channel environment in the actual network is complex and changeable. When the base station selects a certain transmission format for transmission, when the channel environment changes suddenly and cannot meet the transmission reliability, the base station will use HARQ technology to process the data sent by the base station. Retransmission to ensure the reliability of reception. Therefore, the AMC technology can guarantee the validity of the HSDPA network transmission, and the HARQ technology is used to ensure the reliability of the HSDPA network transmission.

The distribution of users is random, and the channel environment of different users is different in different locations. For example, the channel environment of users closer to the base station will be better, while the channel environment of users farther away from the base station will be worse. The network can only select a limited number of users for data transmission at the same time. The 3GPP specification defines a maximum of 4 users. Therefore, it is necessary to select some users for data transmission among these many users, that is, scheduling. The selected users are called scheduling. The method of selecting and scheduling users from many users is called a scheduling strategy. In the HSDPA system, the scheduling function of different users is implemented on the base station side. Compared with the R4 network, its scheduling period is shorter, so it is called PS. Different scheduling strategies lead to different network transmission throughputs that can be finally obtained.

HSDPA technology adopts key technologies such as AMC, HARQ, PS, etc. These technologies need to be combined with the correlation of time. At present, the methods for network simulation of wireless network systems after the introduction of HSDPA technology are:

Method 1. Because HSDPA uses key technologies such as AMC, HARQ, and PS, its advantages are ultimately reflected in the improvement of network capacity, that is, the improvement of network downlink throughput. The increase ratio of the transmission rate brought by fast scheduling can be obtained through system simulation. Therefore, when performing network simulation, the transmission rate that can be obtained according to a certain signal quality level can be directly multiplied by the increase ratio. For example, through the analysis of system simulation results, it is found that the network capacity in a dense urban environment is increased by 20%, and according to the signal quality of a certain point, it can be known that the transmission rate that can be achieved at this point is R, then the transmission rate that can be obtained after using HSDPA technology The rate is R*(1+0.2).

Method 2: Obtain the signal quality distribution in the network through static simulation, and then obtain the HSDPA throughput through an external HSDPA throughput analysis module. For example, after static simulation obtains the distribution of the ratio of useful signal power to interference noise power (SINR) in the network, the HSDPA throughput analysis module selects users for data transmission according to the characteristics of data services initiated by different users and according to a certain scheduling strategy, thereby obtaining Network downlink throughput after applying HSDPA technology.

However, the first method ignores the user distribution characteristics and the impact of different network structures on network capacity, so its implementation is too simple and does not conform to the actual network characteristics; for the second method, it is necessary to rely on the HSDPA throughput analysis module, combined with data service characteristics, The time correlation of data services is dynamically simulated, the implementation method is complex, and the plug-in throughput analysis module depends on the accuracy of the business model.

Contents of the invention

In view of this, the embodiment of the present invention provides a method for obtaining HSDPA transmission throughput in network simulation, which is used to solve the problem of complex time simulation of the wireless network system after the introduction of HSDPA technology in the prior art, and to obtain HSDPA transmission throughput. Quantitative inaccuracies.

A method for obtaining HSDPA transmission throughput in a network simulation provided by an embodiment of the present invention includes:

Obtain the pilot signal quality of each HSDPA user in the at least one HSDPA user according to the obtained location information of at least one high-speed downlink packet access HSDPA user in the planned area;

According to the pilot signal quality of each HSDPA user, select the HSDPA user of the set quantity in each cell as the scheduling HSDPA user to carry out data transmission with the scheduling policy of setting;

The HSDPA transmission throughput of the cell is determined according to the location information of each scheduled HSDPA user in each cell.

A kind of network emulation system that obtains HSDPA transmission throughput that the embodiment of the present invention provides, comprises:

An obtaining unit, configured to obtain the pilot signal quality of each HSDPA user in the at least one HSDPA user according to the obtained location information of at least one HSDPA user in the planned area;

The scheduling unit is used to select a set number of HSDPA users in each cell according to the pilot signal quality of each HSDPA user according to the set scheduling policy to perform data transmission as a scheduled HSDPA user;

The determining unit is configured to determine the HSDPA transmission throughput of the cell according to the location information of each scheduled HSDPA user in each cell.

In the network emulation of the embodiment of the present invention, at first according to the location information of at least one high-speed downlink packet access HSDPA user in the obtained planning area, obtain the pilot signal quality of each HSDPA user in the at least one HSDPA user, and then according to the obtained According to the pilot signal quality of each HSDPA user, the set scheduling strategy is used to schedule the set number of HSDPA users in each cell as the scheduled HSDPA user for data transmission, and finally determine the location information according to the location information of each scheduled HSDPA user in each cell In this way, the wireless network system after the introduction of HSDPA technology can obtain reasonable and accurate HSDPA transmission throughput without increasing the complexity of static simulation calculations, so as to better complete the introduction of HSDPA technology. Planning of wireless network system.

Description of drawings

Fig. 1 is the flowchart of the method in the network emulation of the embodiment of the present invention;

Fig. 2 is the method flowchart of embodiment 1 in the embodiment of the present invention;

Fig. 3 is the distribution figure of HSDPA user in the simulated planning area in the embodiment of the present invention;

Fig. 4 is the method flowchart of embodiment 2 in the embodiment of the present invention;

Fig. 5 is the method flowchart of embodiment three in the implementation of the present invention;

Fig. 6 is a system structure diagram of network simulation for obtaining HSDPA transmission throughput in the implementation of the present invention.

Detailed ways

In the embodiment of the present invention, the network simulation system simulates key technologies such as AMC, HARQ, and PS in the HSDPA one by one, so that the HSDPA transmission throughput is obtained in the network simulation, and the specific process is as follows, referring to Fig. 1:

Step 101: Obtain location information of at least one HSDPA user in a planning area. Here, various possible HSDPA user distributions in the planning area can be input into the network simulation system, and the network simulation system can also obtain the basic information of each cell in the planning area, including the base station location of each cell, the HSDPA service channel of each cell Transmit power, and antenna gain diagram, etc.

Step 102: Obtain the pilot signal quality of each HSDPA user in each cell according to the location information of each HSDPA user among the at least one HSDPA user acquired in step 101.

Here, the cell to which each HSDPA user belongs can be determined according to the strongest pilot channel signal strength RSCP received at the position of each HSDPA user, and then according to the transmission power of each cell base station in the planning area, each HSDPA user and the described Calculate the pilot signal quality index of each HSDPA user based on the distance of each cell base station. The cell to which each HSDPA user belongs may also be determined only according to the strongest pilot channel signal strength RSCP received at each HSDPA user's location.

Step 103: According to the pilot signal quality of each HSDPA user obtained in step 102, a set scheduling policy is used to select a set number of HSDPA users in each cell as scheduled HSDPA users for data transmission. The certain number here is determined according to the 3GPP planning agreement, and the scheduling strategy includes: the largest pilot signal quality index scheduling strategy, the proportional fair scheduling strategy, and the round robin scheduling strategy.

When the scheduling strategy is the maximum pilot signal quality index scheduling strategy, the network simulation system will sort the HSDPA users in the same cell according to the pilot signal quality index of each HSDPA user from large to small, and then select the ranking in the cell according to the sorting results The previously set number of HSDPA users perform data transmission as scheduled HSDPA users.

When the scheduling strategy is a proportional fair scheduling strategy, the network simulation system sorts the HSDPA users in the same cell from large to small according to the pilot signal quality index of each HSDPA user, and then selects the HSDPA users in the cell in a certain proportion according to the sorting results. A certain number of HSDPA users are used as scheduled HSDPA users for data transmission.

When the scheduling strategy is the polling scheduling strategy, the network simulation system randomly selects a set number of HSDPA users in each cell as the scheduling HSDPA users for data transmission.

Step 104: Obtain the corresponding transmission format of each scheduled HSDPA user according to the location information of each scheduled HSDPA user. Here, the corresponding relationship between the HS-PDSCH (High Speed Packet Downlink Shared Channel, HSDPA service channel) channel quality index and the preset transmission format can be obtained through link simulation, and the network simulation system saves the corresponding relationship. The network simulation system first obtains the service channel HS-PDSCH channel quality index of the location according to the saved location information of each scheduled HSDPA user, and then determines the HS-PDSCH channel quality index corresponding to each scheduled HSDPA user according to the saved corresponding relationship. transmission format.

Step 105: According to the corresponding transmission format of each scheduled HSDPA user in each cell obtained in step 104, determine the HSDPA transmission throughput of the cell. Here, according to the corresponding transmission format of each scheduled HSDPA user in each cell obtained in step 104, according to the transmission time interval stipulated in the 3GPP specification, and the number of scheduled HSDPA users in each cell, calculate each Scheduling the transmission rate of the HSDPA user, and then superimposing the transmission rate of each scheduled HSDPA user in the same cell to obtain the HSDPA transmission throughput of the cell.

The embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Embodiment 1, referring to FIG. 2 , is described by taking the HSDPA system as an example where the scheduling strategy is the scheduling strategy of the maximum pilot signal quality index.

Step 201: Obtain the distribution of at least one HSDPA user in the planned area, that is, obtain specific location information of at least one HSDPA user in the planned area. Here, in the network simulation process, various possible distributions of HSDPA users can be input into the network simulation system to simulate various distribution conditions of HSDPA users that may appear in the actual environment. In this embodiment, the planning area is as shown in Figure 3, including two cells, and 10 HSDPA users (UE1～UE10) are distributed in this area, and the specific location information of these 10 HSDPA users and the two cells that need to be planned The basic information of the input into the simulation system.

Step 202: Obtain the pilot channel quality of the HSDPA user according to the location of each HSDPA user, determine the cell where each HSDPA user is located according to the pilot channel quality of each HSDPA user, and finally sort these HSDPA users in the same cell .

In different CDMA systems, the pilot channel quality index is different, but in the physical sense, it can be understood as the ratio of the useful signal power to the interference noise power on the pilot channel.

For example, Ec/Io (Ec is the capability of each chip, and Io is the interference power spectral density) is applied in a wideband code division multiple access (WCDMA, Wide Code Division Multiple Access) system, which can be equivalent to RSCP/(RSSI- RSCP) is used to measure the level of received signal strength and interference of the pilot channel, among which, RSCP (Received Signal Code Power, received signal code power); RSSI (Received Signal Strength Indicator, received signal strength indicator). In the time division synchronous code division multiple access (TD-SCDMA, Time Division-Synchronous Code Division Multiple Access) system, C/I is applied (C is the received signal carrier power of the pilot channel, and I is the received signal interference power). In this embodiment, C/I is used as an indicator of pilot channel quality as an example for description.

As shown in Figure 3, the distribution of HSDPA users in the simulated planning area is simulated. The network simulation system determines the cell where each HSDPA user is located according to the strongest pilot channel signal strength (RSCP) of each HSDPA user location. UE1-UE4 receive the RSCP of cell 1 If it is the strongest, then UE1-UE4 belong to cell 1; if UE5-UE10 receives the strongest RSCP of cell 2, then UE5-UE10 belong to cell 2. Then the network simulation system calculates the C/I of each HSDPA user in each cell, and the specific process of calculating the C/I of UE1 is as follows:

During the network planning process, the transmit power of cell 1 obtained by the network simulation system is P1, and the transmit power of cell 2 is P2, then the useful signal power of cell 1 received by UE1 is P1+G1-L1, where G1 is the transmit antenna gain of the base station from cell 1 to UE1, and L1 is the path loss between cell 1 and UE1. The received interference power at the location of UE1 is the power generated by the transmit power of cell 2 reaching UE1, which is P2+G2-L2, where G2 is the base station transmit antenna gain from cell 2 to UE1. L2 is the path loss caused by the distance between cell 2 and UE1. Therefore, the C/I of UE1 can be expressed as C/I=(P1+G1-L1)/(P2+G2-L2).

The network simulation system calculates the C/I of each HSDPA user according to the location of different users, and sorts these users in the same cell according to the size of the C/I.

Step 203: According to the sorting result of step 202, in the same transmission time interval (TTI, TransportTime Interval), select the best N HSDPA users of pilot channel quality to carry out data transmission, just select C/I in the same TTI The largest N HSDPA users perform data transmission. Among them, TTI is stipulated by 3GPP specification; N is the number of users scheduled at the same time. Cannel, HSDPA shared information channel) channel logarithm decision. Here, the HS-SCCH/HS-SICH channel logarithm of HSDPA community configuration is 3, then N must be less than or equal to 3, and here N=3, then select the HSDPA user whose C/I value ranks first three as the scheduling HSDPA user, The selected 3 HSDPA users are 3 scheduling HSDPA users. Thus, the PS in HSDPA technology is simulated.

Step 204: According to the location of each scheduled HSDPA user selected in step 203, obtain the HS-PDSCH channel quality of the location. Among them, the HS-PDSCH channel quality CQI (Channel Quality Indicator) can be represented by SINR, the ratio of bit energy to noise power spectral density (Eb/N0), or the ratio of symbol energy to noise power spectral density (Es/N0). In this embodiment, the SINR is used as an example to describe the channel quality. According to an HSDPA user selected in step 203, the location can be obtained according to the path loss between its location and the base station obtained during planning, as well as the HSDPA service channel transmit power of the cell, the downlink transmit power of the surrounding cells, and the antenna gain diagram Useful signal power (Ps), interference power (Pi) and noise power (Pn) to determine the achievable SINR, SINR=Ps/(Pi+Pn). According to the above method, the SINRs of all the scheduled HSDPA users selected in step 203 can be sequentially obtained.

Step 205: According to the correspondence between the saved SINR and the preset transport format resource combination (TFRC, TransportFormat and Resource Combination), obtain the corresponding TFRC of the SINR of each scheduled HSDPA user in step 204.

Here, the essence of the AMC technology is to select the largest transmission resource block for transmission under the condition of ensuring a certain transmission reliability according to the channel quality level. In the actual network, the base station will also select a suitable transmission block according to the currently obtained signal quality level. Therefore, in the HSDPA simulation, the TFRC corresponding to the SINR of each HSDPA user in step 204 can be obtained by saving the corresponding relationship between the SINR and the TFRC. TFRC includes the modulation method, coding method, and transport block size. Since the main goal of static simulation is to plan HSDPA throughput performance, the transport block size can be used as the TFRC index here. The following reasonable assumptions are that TFRC represents the transport block included in the transport format Size, so the choice of TFRC is also the choice of transport block.

Therefore, choosing the appropriate transmission block according to the channel quality of the user's location realizes the simulation of the AMC technology in the HSDPA system. The corresponding relationship of TFRC-SINR saved here can be obtained according to the link simulation method, see Table 1 for details:

TFRC channel environment SINR(dB) TFRC1 PA SINR1 TFRC... PA TFRC PA

Table 1

HARQ technology essentially adopts selective retransmission when the signal quality deteriorates to ensure the reliability of transmission. Assuming that the transmission format selected by the AMC technology is QPSK as the modulation method and the coding rate is 2/3, then when the channel quality deteriorates and cannot meet the transmission reliability, the HARQ technology will select part or all of the content in the initial transmission block for retransmission. Therefore, after retransmission, the equivalent transmission format may change to a coding rate of 1/2, thus reducing the effective information transmission rate.

It can be seen that the HARQ process is a dynamic process, which needs to be combined with the time-varying characteristics of the channel environment. In the PA channel environment, the transport block size corresponding to SINR1 is TFRC1. Then, after considering HARQ technology, the transmission efficiency of HSDPA will be reduced. Therefore, we can obtain the effective transmission block size that can be achieved after considering HARQ retransmission under the same SINR1 condition through link simulation. TFRC1', and TFRC1' <TFRC1, here you can obtain the corresponding relationship between TFRC, TFRC' and SINR through the method of link simulation, see Table 2 for details:

TFRC' TFRC channel environment SINR(dB) TFRC1' TFRC1 PA SINR1 TFRC2'... TFRC2... PA SINR2 TFRCn' TFRC PA SINR

Table 2

In this way, after obtaining the SINR of each scheduled HSDPA user in step 204, the corresponding TFRC' is obtained according to Table 2, thereby simulating the AMC technology and HARQ in the HSDPA system.

Step 206: Calculate the transmission rate of each scheduled HSDPA user selected in step 203, the more users scheduled at the same time, the longer the time required for each user to transmit the same data block, therefore, each scheduled HSDPA obtained in step 205 The TFRC' corresponding to the HSDPA user can be divided by N×TTI to obtain the transmission rate of each scheduled HSDPA user. The sum of the transmission rates of the scheduled HSDPA users in the same cell is the HSDPA transmission throughput of the cell, so the HSDPA transmission throughput of the cell is obtained by superimposing the calculated transmission rates of each scheduled HSDPA user in the same cell, thus achieving The purpose of network emulation after HSDPA technology is introduced.

The above-mentioned embodiment is a snapshot (SnapShot) in the simulation process. Multiple SnapShots are performed to obtain the transmission rate statistics of the HSDPA users scheduled in each SnapShot and the transmission rate statistics of each cell. Finally, the peak rate, average rate, and edge rate that can be achieved by each cell are obtained by averaging multiple SnapShots.

Embodiment 2: Referring to FIG. 4, it is described by taking the HSDPA system, and the scheduling strategy is a proportional fair scheduling strategy as an example.

Step 401: Obtain the distribution of at least one HSDPA user in the planned area, that is, obtain specific location information of at least one HSDPA user in the planned area. At the same time, the network simulation system also obtains the basic information of each community in the planning area.

Step 402: Calculate the pilot channel quality of each HSDPA user in each cell according to the location of the user, and sort the HSDPA users in the same cell according to the calculated pilot channel quality.

Step 403: According to the sorting result of step 402, within the same TTI, select N HSDPA users with the best pilot channel quality for data transmission with a certain probability. That is, the selected N HSDPA users are N scheduled HSDPA users. Here, the HSDPA cell configuration determines that N=3, so the top three HSDPA users can be selected as the scheduling HSDPA users, or the HSDPA users with the rankings of 1, 2, and 4, or the three rankings of 2, 3, and 6 can be selected. As a scheduling HSDPA user, the user only needs to select N HSDPA users with the best pilot channel quality for data transmission with a certain probability.

Step 404: According to the location of each scheduled HSDPA user selected in step 403, the SINR of the location is obtained.

Step 405: According to the corresponding relationship between the stored SINR and TFRC', obtain the TFRC' corresponding to the SINR of each scheduled HSDPA user in step 404. Here, the corresponding relationship between TFRC, TFRC' and SINR can also be obtained through the method of link simulation, see Table 2 for details.

Step 406: Calculate the transmission rate of each scheduling HSDPA user selected in step 403, obtain the corresponding TFRC ' of each scheduling HSDPA user obtained in step 405 and divide it by N * TTI to obtain the transmission rate of each scheduling HSDPA user. By superimposing the calculated transmission rate of each scheduled HSDPA user in the same cell, the HSDPA transmission throughput of the cell is obtained, thus achieving the purpose of network simulation after the introduction of HSDPA technology.

The above-mentioned embodiment is a snapshot (SnapShot) in the simulation process. Multiple SnapShots are performed to obtain the transmission rate statistics of the HSDPA users scheduled in each SnapShot and the transmission rate statistics of each cell. Finally, the peak rate, average rate, and edge rate that can be achieved by each cell are obtained by averaging multiple SnapShots.

Embodiment 3: Referring to FIG. 5 , the scheduling strategy of the HSDPA system is described as a round-robin scheduling strategy.

Step 501: Obtain the distribution of at least one HSDPA user in the planned area, that is, obtain specific location information of at least one HSDPA user in the planned area.

Step 502: Calculate the pilot channel quality of each HSDPA user according to the position of each HSDPA user in each cell. Here, it is only necessary to obtain the strongest pilot channel signal strength of the position where each HSDPA user is located. According to the strongest pilot channel signal Strength determines the cell where each HSDPA user is located.

Step 503: Randomly select N HSDPA users in the same TTI of each cell for data transmission. That is, the selected N HSDPA users are N scheduled HSDPA users.

Step 504: According to the location of each scheduled HSDPA user selected in step 503, the SINR of the location is obtained.

Step 505: According to the correspondence between the stored SINR and TFRC', obtain the TFRC' corresponding to the SINR of each scheduled HSDPA user in step 403. Here, the corresponding relationship between TFRC, TFRC' and SINR can also be obtained through the method of link simulation, see Table 2 for details.

Step 506: Calculate the transmission rate of each scheduling HSDPA user selected in step 503, obtain the corresponding TFRC ' of each scheduling HSDPA user obtained in step 504 and divide it by N * TTI to obtain the transmission rate of each scheduling HSDPA user. By superimposing the calculated transmission rate of each scheduled HSDPA user in the same cell, the HSDPA transmission throughput of the cell is obtained, thus achieving the purpose of network simulation after the introduction of HSDPA technology.

The above-described embodiment is a snapshot (SnapShot) in the emulation process, and multiple SnapShots are carried out to obtain respectively the transmission rate statistics and the transmission rate statistics of each sub-district of scheduling H SDPA users in each SnapShot. Finally, the peak rate, average rate, and edge rate that can be achieved by each cell are obtained by averaging multiple SnapShots.

The network emulation method described in the embodiment of the present invention can not only be applied to the HSDPA system, but also can be applied to the wireless side uplink enhancement technology (HSUPA, High Speed Uplink Packet Access), HSPA+ or 3G evolution (LTE, Long Term Evolution) system Among them, as long as the wireless network system using the three key technologies of AMC, HARQ and PS can apply the network simulation method described in the present invention to simulate the communication system, it can reasonably Simulate system throughput performance for better planning of these systems.

The network simulation system in the embodiment of the present invention includes: an obtaining unit 100 , a scheduling unit 200 and a determining unit 300 . See Figure 6, where,

The obtaining unit 100 is configured to obtain the pilot signal quality of each HSDPA user in the at least one HSDPA user according to the obtained location information of at least one HSDPA user in the planned area;

The scheduling unit 200 is configured to select a set number of HSDPA users in each cell as scheduled HSDPA users for data transmission according to the pilot signal quality of each HSDPA user with a set scheduling policy.

The determining unit 300 is configured to obtain the corresponding transmission format of each scheduled HSDPA user according to the saved location information of each scheduled HSDPA user in each cell to determine the HSDPA transmission throughput of the cell.

Further, the obtaining unit 100 is used to determine the cell to which each HSDPA user belongs according to the strongest pilot channel signal strength RSCP received at the location of each HSDPA user, and then according to the transmit power of each cell base station in the planning area, each HSDPA Calculate the pilot signal quality index of each HSDPA user based on the distance between the user and the base stations of each cell. Of course, the obtaining unit 100 may not calculate the pilot signal quality index of each HSDPA user, but only needs to determine the cell to which each HSDPA user belongs.

The scheduling unit 200 is used to sort the HSDPA users in the same cell according to the pilot signal quality index of each HSDPA user from large to small, and then select the HSDPA users with the highest set number in the cell as the scheduling HSDPA users according to the sorting results. User data transfer. or,

The scheduling unit 200 is used to sort the HSDPA users in the same cell according to the pilot signal quality index of each HSDPA user from large to small, and then select a set number of HSDPA users in the cell in a certain proportion according to the sorting results as the scheduling HSDPA user. User data transfer. or,

The scheduling unit 200 is configured to randomly select a set number of HSDPA users in each cell as scheduled HSDPA users for data transmission.

The determining unit 300 is used to obtain the traffic channel HS-PDSCH channel quality index of the position according to the saved position information of each scheduled HSDPA user, and then determine the corresponding relationship between the saved HS-PDSCH channel quality index and the preset transmission format for each scheduled HSDPA user. The transmission format corresponding to the HS-PDSCH channel quality index of each scheduled HSDPA user, and finally according to the corresponding transmission format of each scheduled HSDPA user in each cell, according to the transmission time interval stipulated in the 3GPP specification, and the scheduling of HSDPA users in each cell Calculate the transmission rate of each scheduled HSDPA user in each cell, and superimpose the transmission rate of each scheduled HSDPA user in the same cell to obtain the HSDPA transmission throughput of the cell.

In summary, each time the network simulation system of the embodiment of the present invention performs a SnapShot, the transmission rate of the HSDPA users scheduled in each SnapShot and the HSDPA transmission throughput of each cell can be obtained, and multiple SnapShots can be performed to obtain the scheduled HSDPA users in each SnapShot. The transmission rate statistics of HSDPA users and the transmission rate statistics of each cell, and finally the peak rate, average rate and edge rate of each cell can be obtained by averaging multiple SnapShots. In this way, the wireless network system after the introduction of HSDPA technology is Obtain reasonable under the premise of increasing static emulation computational complexity, more accurate HSDPA transmission throughput, therefore, applied the wireless network system of AMC, HARQ and PS three major key technologies after applying the method for network emulation described in the present invention , can reasonably simulate system throughput performance without increasing system complexity, and better complete the planning of these systems.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (12)

1. obtain the method for high-speed downlink packet access HSDPA transmission throughput in a kind of network emulation, it is characterized in that, comprising: Obtain the pilot signal quality of each HSDPA user in the at least one HSDPA user according to the obtained location information of at least one HSDPA user in the planned area; According to the pilot signal quality of each HSDPA user, select a set number of HSDPA users in each cell to perform data transmission as a scheduled HSDPA user with a scheduling policy, wherein the scheduling policy includes: a maximum pilot signal quality index Scheduling strategy, proportional fair scheduling strategy or round robin scheduling strategy; The HSDPA transmission throughput of the cell is determined according to the location information of each scheduled HSDPA user in each cell. 2. The method according to claim 1, wherein, according to the position information of at least one HSDPA user in the planning area obtained, obtaining the pilot signal quality of each HSDPA user in the at least one HSDPA user comprises: Determine the cell to which each HSDPA user belongs according to the strongest pilot channel signal strength RSCP received at the position of each HSDPA user; Calculate the pilot signal quality index of each HSDPA user in each cell according to the transmission power of each cell base station in the planning area and the distance between each HSDPA user and the respective cell base station. 3. the method for claim 2, is characterized in that, when described scheduling strategy is maximum pilot signal quality index scheduling strategy, described according to the pilot signal quality of each HSDPA user with the scheduling strategy of setting Selecting a set number of HSDPA users in each cell as scheduled HSDPA users for data transmission includes: Sort the HSDPA users in the same cell according to the pilot signal quality index of each HSDPA user from large to small; According to the sorting result, a set number of HSDPA users ranking first in the cell are selected as scheduled HSDPA users for data transmission. 4. The method according to claim 2, wherein, when the scheduling strategy is a proportional fair scheduling strategy, each sub-district is scheduled with the scheduling strategy set according to the pilot signal quality of each HSDPA user The set number of HSDPA users in the schedule as HSDPA users for data transmission includes: Sort the HSDPA users in the same cell according to the pilot signal quality index of each HSDPA user from large to small; Select a set number of HSDPA users in the cell in a certain proportion according to the sorting results as scheduled HSDPA users for data transmission. 5. The method according to claim 2, wherein when the scheduling strategy is a round-robin scheduling strategy, said according to the pilot signal quality of each HSDPA user with the scheduling strategy set up scheduling each cell A certain number of HSDPA users as scheduled HSDPA users for data transmission include: Randomly select a set number of HSDPA users in each cell as scheduled HSDPA users for data transmission. 6. The method according to claim 2, wherein, determining the HSDPA transmission throughput of the subdistrict according to the location information of each scheduling HSDPA user in each subdistrict comprises: Obtain the traffic channel HS-PDSCH channel quality index of this position according to the position information of each scheduled HSDPA user; According to the corresponding relationship between the preserved HS-PDSCH channel quality index and the preset transmission format, determine the transmission format corresponding to the HS-PDSCH channel quality index of each scheduled HSDPA user; According to the corresponding transmission format of each scheduling HSDPA user in each cell, the transmission time interval specified by the 3GPP specification, and the number of scheduling HSDPA users in each cell calculate the transmission rate of each scheduling HSDPA user in each cell; The transmission rate of each scheduled HSDPA user in the same cell is superimposed to obtain the HSDPA transmission throughput of the cell. 7. A network emulation system for obtaining HSDPA transmission throughput, is characterized in that, comprising: An obtaining unit, configured to obtain the pilot signal quality of each HSDPA user in the at least one HSDPA user according to the obtained location information of at least one HSDPA user in the planned area; The scheduling unit is used to select a set number of HSDPA users in each cell according to the pilot signal quality of each HSDPA user with a set scheduling policy as a scheduled HSDPA user for data transmission, wherein the scheduling policy includes: a maximum Pilot signal quality index scheduling strategy, proportional fair scheduling strategy or round robin scheduling strategy; The determining unit is configured to determine the HSDPA transmission throughput of the cell according to the location information of each scheduled HSDPA user in each cell. 8. The network simulation system according to claim 7, wherein the obtaining unit comprises: Determining the subunit, used to determine the cell to which each HSDPA user belongs according to the strongest pilot channel signal strength RSCP received at the position of each HSDPA user; The calculation subunit is used to calculate the pilot signal quality index of each HSDPA user according to the transmission power of each cell base station in the planning area and the distance between each HSDPA user and each cell base station. 9. The network emulation system according to claim 8, wherein the scheduling unit comprises: The first sorting subunit is used to sort the HSDPA users of the same cell according to the pilot signal quality index of each HSDPA user from large to small; The first selection subunit is used to select a set number of HSDPA users ranked first in the cell as scheduled HSDPA users for data transmission according to the sorting result. 10. The network emulation system according to claim 8, wherein the scheduling unit comprises: The second sorting subunit is used to sort the HSDPA users of the same cell according to the pilot signal quality index of each HSDPA user from large to small; The second selection subunit is used to select a set number of HSDPA users in the cell in a certain proportion according to the sorting result as the scheduled HSDPA users for data transmission. 11. The network emulation system according to claim 8, wherein the scheduling unit comprises: The third selection subunit is used to randomly select a set number of HSDPA users in each cell as scheduled HSDPA users for data transmission. 12. The network simulation system according to claim 8, wherein the determining unit comprises: The obtaining subunit is used to obtain the traffic channel HS-PDSCH channel quality index of the position according to the position information of each scheduled HSDPA user; The determination subunit is used to determine the transmission format corresponding to the HS-PDSCH channel quality index of each scheduled HSDPA user according to the corresponding relationship between the preserved HS-PDSCH channel quality index and the preset transmission format; The calculation subunit is used to calculate each scheduled HSDPA user in each cell according to the corresponding transmission format of each scheduled HSDPA user in each cell, the transmission time interval specified in the 3GPP specification, and the number of scheduled HSDPA users in each cell. The transmission rate of HSDPA users; The superposition subunit is configured to superimpose the transmission rate of each scheduled HSDPA user in the same cell to obtain the HSDPA transmission throughput of the cell.

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