CN100456650C - Method for Setting Power Bias and System Scheduling - Google Patents

Abstract

The present invention relates to a method for setting power bias and carrying out system dispatching, which has the core that according to the power of a high-speed downlink shared channel (HS-DSCH) and the spread spectrum code N of an HS-PDSCH channel, wherein the power is allocated by the system, the sending power of each code channel is determined. According to the sending power of a common pilot channel CPICH and the sending power of each determined code channel, wherein the sending power is allocated by the system, the corresponding power bias measured by CQI is set up. By the present invention, each code channel can be caused to send data at the same power, and thereby, the uncertainty and the complexity of the sending power and the spread spectrum code of the HSDPA user are decreased, and the sending power of the HSDPA user remains constant for a space, and consequently, the influence generated on CQI measurement by the fluctuation of the HSDPA sending power is decreased; moreover, the system can flexibly distribute the power and the spread spectrum code resource and dynamically manage the resource between R99 and the HSDPA user. When a terminal receives and makes 16QAM demodulation soft decision, the relative receiving power of the terminal can be accurately calculates through the exact measurement of the CPICH channel directly, whereas, the relative power bias does not need to be measured in real time.

Description

Method for Setting Power Bias and System Scheduling

technical field

The invention relates to the communication field, in particular to a method for setting power bias and performing system scheduling.

Background technique

HSDPA (High Speed Downlink Packet Access; High Speed Downlink Packet Access) technology is a key technology for WCDMA (Wide-band Code Division Multiple Access; Wideband Code Division Multiple Access) system to improve the downlink peak transmission rate and system spectral efficiency.

The uplink of HSDPA technology passes through the HS-DPCCH channel (High Speed-dedicated physical control channel; high-speed dedicated physical control channel), feedback information about whether the UE accurately receives downlink data and the currently received CQI (Channel Quality lndicator; channel quality indication) information; The downlink uses the time-division and code-division multiplexing of HS-PDSCH (High Speed Physical Downlink Shared Channel), the system transmits user data, and selects a reasonable transmission format, and through HS-SCCH (High Speed Physical Downlink Shared Channel) ; high-speed downlink shared channel) to send corresponding code channel resources, transport block length and coding parameters and other instructions.

At present, the system can support up to 15 HS-PDSCH channels for transmitting business data. In order to support multiple user code division multiplexing data transmission at the same time, multiple HS-SCCH channels are also required. At this time, the system needs to be able to Data transmission requirements, dynamically configure the number and power of HS-PDSCH channels. The process includes the following steps:

Step 1, the user measures the CQI value, and feeds back the measured CQI value and data transmission requirement information to the system.

When the user UE measures the CQI, the linear relationship between the received signal-to-noise ratio of the P-CPICH channel (or S-CPICH channel) and the received signal-to-noise ratio of the HS-DSCH channel is used: by measuring the reference P-CPICH that the UE has been sending Received signal-to-noise ratio of the channel (or S-CPICH), calculates the reference received signal-to-noise ratio when the HS-DSCH channel is transmitted with a relative power offset Γ (the signal-to-noise ratio reflects the current wireless channel quality, including path loss, shadow fading and fast fading instantaneous changes. The current protocol defines 30 levels of CQI values, which correspond to 30 transmission formats of HS-DSCH channels, including modulation mode, number of physical channels, transmission block length and power adjustment ratio, etc.). According to the reference receiving signal-to-noise ratio and its own demodulation performance, that is, the corresponding relationship between the receiving signal-to-noise ratio of the HS-PDSCH channel and the block error rate in different transmission formats, the UE determines that a single reception under the signal-to-noise ratio meets 10% block error The CQI value of the rate is selected, and the current measured CQI value is periodically fed back through the uplink HS-DPCCH channel.

The above relative power offset Γ is a parameter given by the system. The transmission format corresponding to the CQI value is only a reference transmission format. When the system actually transmits data, it can adapt to the current UE signal by changing the transmission block length, number of code channels, modulation method or power. receiving quality.

Step 2, the system receives CQI measurement information and data transmission requirement information fed back by each UE (User Equipment; user equipment).

Step 3, the system adaptively selects the current corresponding subframe for the user according to the information fed back by the user, as well as the corresponding transmission format, the number of HS-PDSCH channels for each user, modulation mode, transmission block length and power ratio.

Based on the CQI value fed back by the user, the system selects an appropriate transmission format and sends it to the user through the downlink HS-DSCH channel, thus ensuring the receiving quality of a single transmission under this channel condition.

The prior art related to the present invention is that the system adaptively schedules the current corresponding subframe for the user through the CQI value fed back by the user, as well as the corresponding transmission format, the number of HS-PDSCH channels for each user, the modulation method, and the transmission block Scheme of length and power ratio:

The transmission format corresponding to the CQI value is defined in the current HSDPA protocol. Taking the UE of category 7 as an example, the mapping relationship between different CQI values and transmission formats is shown in Table 1:

CQI value transport block length Number of HS-PDSCH channels Modulation Reference power adjustment factor Δ 1 137 1 QPSK 0 2 173 1 QPSK 0 3 233 1 QPSK 0 4 317 1 QPSK 0 5 377 1 QPSK 0 6 461 1 QPSK 0 7 650 2 QPSK 0 8 792 2 QPSK 0 9 931 2 QPSK 0 10 1262 3 QPSK 0 11 1483 3 QPSK 0 12 1742 3 QPSK 0 13 2279 4 QPSK 0 14 2583 4 QPSK 0 15 3319 5 QPSK 0 16 3565 5 16-QAM 0 17 4189 5 16-QAM 0 18 4664 5 16-QAM 0 19 5287 5 16-QAM 0 20 5887 5 16-QAM 0 twenty one 6554 5 16-QAM 0 twenty two 7168 5 16-QAM 0 twenty three 9719 7 16-QAM 0 twenty four 11418 8 16-QAM 0 25 14411 10 16-QAM 0 26 14411 10 16-QAM -1 27 14411 10 16-QAM -2 28 14411 10 16-QAM -3 29 14411 10 16-QAM -4 30 14411 10 16-QAM -5

Table I

It can be seen from Table 1 that it mainly includes the modulation mode, the number of physical channels and the length of the transmission block. The modulation methods include QPSK and 16QAM. As the CQI value increases, the length of the transport block increases accordingly, and the number of physical channels and modulation orders also increase accordingly. Since category 7 only supports up to 10 code channels, when the value of the channel quality CQI exceeds 25, the CQI The transmission format corresponding to the value remains the setting corresponding to 25.

Since the 16QAM modulation method can transmit more coded data information, higher power and higher CQI values are required; higher CQI values mean that more physical channels can be transmitted or higher modulation methods can be used , in order to transmit more user data. Therefore, when the CQI value fed back by the user and the demand for data transmission are high, the system needs to adaptively select the 16QAM modulation mode or a higher CQI value.

When the value of the channel quality CQI exceeds 25, the number of HS-PDSCH channels in the transmission format corresponding to the CQI value remains unchanged at this time, so the system reduces the reference transmission power to varying degrees by changing the power adjustment factor at this time. Redundancy in reducing transmit power.

As can be seen from the technical solutions of the prior art, it has the following defects:

Since the channel reception quality of each UE in the cell is different based on the same reference power offset Γ given by the system, the CQI values reported to the system will be different, and the transmission formats corresponding to different CQI values have different numbers of code channels. During system scheduling, based on the current CQI mapping relationship, if the CQI transmission format is not adjusted, it is difficult to ensure that the sum of the transmission power of each scheduled user is equal to the total power of the allocated HS-DSCH channel, and the sum of the code channels occupied by each user is equal to The number of allocated HS-PDSCH code channels, so the transmission format of the user needs to be adjusted. However, when the transmission format of the currently scheduled user is adjusted to a certain extent, although the power and code resources allocated by the system can be fully utilized to a certain extent, the Based on the different reception performance of different terminals, there are many uncertainties in system adjustment, so it is difficult to ensure that the transmission format and power selected for scheduling users meet the best reception quality of their current channel (for example, to ensure a 10% block error rate) .

If an appropriate transmission format is selected directly based on the CQI value reported by the UE, the subframe allocated for each scheduled user may have remaining code resources or power resources, which is a waste of system resources. Moreover, with the change of the service ratio in the cell, the HSDPA power of each subframe also changes, which increases the fluctuation of the downlink load, thus affecting the reception of the downlink channel, and bringing dynamic code resources and power resource management between HSDPA and R99 users. difficulty.

When the UE receives a 16QAM signal, each subframe must measure the relative received power of each HS-PDSCH channel in real time, and the relative power offset needs to be measured in real time, which needs to store the HS-PDSCH demodulation information, so it will bring data storage delay, And to a certain extent, the complexity of UE implementation is increased, and the inaccurate measurement will also cause demodulation performance loss.

Contents of the invention

The purpose of the present invention is to provide a method for setting power offset and system scheduling. Through the present invention, each code channel can be used to transmit data with the same power, thereby reducing the transmission power and spreading code resource allocation of HSDPA users. Uncertainty and complexity, and it is possible to keep the transmit power of HSDPA users constant for a period of time, thereby reducing the impact of HSDPA transmit power fluctuations on CQI measurement; at the same time, due to the simple allocation of user power and code resources, the system can Accomplish the flexible allocation of power and spreading code resource, provide possibility for the dynamic resource management of system between R99 and HSDPA user; Moreover by the present invention, the power that each user receives each HS-PDSCH channel is exactly CPICH signal power measurement With the power offset Γ, when the terminal receives and makes a soft decision for 16QAM demodulation, it can directly calculate its relative received power through the measurement of the CPICH channel, instead of measuring the relative power offset in real time.

The purpose of the present invention is achieved through the following technical solutions:

The present invention provides a method for setting power bias, which includes:

A. According to the power P _{HS-DSCH of the high-speed downlink shared channel HS-DSCH} allocated by the system and the number N of HS-PDSCH channel spreading codes, determine the transmission power of each code channel as P _HS-DSCH /N;

B. Set the power offset Γ=(P HS _{- DSCH} /N)/ P _cpich .

The present invention provides a method for system scheduling, which includes:

C. According to the power P _HS-DSCH and HS-PDSCH channel spreading code N of the high-speed downlink shared channel HS-DSCH allocated by the system, determine the transmission power of each code channel as P _HS-DSCH /N; For the transmission power P _cpich of the pilot channel CPICH, and the determined power of each code channel, set the corresponding CQI measurement power offset Γ=(P _HS-DSCH /N)/P _cpich ;

D. The system schedules the users accordingly according to the CQI information reported by each user in the cell and the determined transmission power of each code channel.

Wherein, the step D specifically includes:

D1. According to the CQI information reported by each user, the system schedules a different number of code channels M for each user who needs to send data, and makes the total number of code channels allocated to all users equal to the number N of spreading codes;

D2. Determine the transmission power of the user according to the number M of code channels scheduled for the user and the determined transmission power of each code channel, and allocate it to the user;

D3. According to the CQI information reported by each user, assign the transmission format when the user transmits data;

D4. Scheduling user transmission data based on the allocated transmission power and transmission format.

Wherein, in step D2, the process of determining the transmission power of the user includes:

The transmit power of the user is equal to the number M of code channels scheduled for the user multiplied by the determined transmit power of each code channel.

Wherein, the step D3 specifically includes:

D31. Mapping the CQI information reported by the user to a transmission format of a single code channel;

D32. According to the mapping relationship between the CQI value and the transmission format, and the number M of allocated code channels, determine the length of the data block to be transmitted by the user and the corresponding modulation mode.

Wherein, the step D4 specifically includes:

D41. The system schedules the user to transmit data according to the allocated transmission power and transmission format within a predetermined time period.

Wherein, the step D41 includes:

D42, the system measures the load of the HSDPA user;

D43. According to the measurement result, it is judged whether the current power resource allocated by the system for the HSDPA user has a margin, if there is a margin, then reduce the number N of the HS-PDSCH channel spreading codes allocated for the HSDPA user, and keep the number N of each code channel The original power is unchanged, and according to the number N of the newly allocated HS-PDSCH channel spreading codes, the HSDPA users are scheduled to transmit data according to the CQI reported by each HSDPA user, and then turn to step D42; otherwise, the system schedules the HSDPA users at the predetermined According to the number N of the HS-PDSCH channel spreading codes originally distributed in the time period, transmit data, and then turn to step D42;

Further, the step D41 includes:

D44. The system measures the usage of the transmission power and code channel resources allocated for R99 users and HSDPA users, and the data queue requirements of current HSDPA users;

D45. According to the measurement results, it is judged whether the transmission power or code channel resource allocated to the R99 user is redundant. If so, and the HSDPA user has more data to transmit, then increase the power P _HS-DSCH or HS of the HSDPA user accordingly -The number N of PDSCH channel spreading codes, correspondingly change the power offset Γ=(P _HS-DSCH /N)/P _cpich of each code channel, then notify each HSDPA user, and re-according to the newly allocated HS- DSCH channel power P _HS-DSCH and the number N of HS-PDSCH channel spreading codes, according to the CQI that each HSDPA user reports, dispatches the HSDPA user to transmit data, then proceeds to step D44; Otherwise, executes step D46;

D46. The system judges whether the power or code channel resources allocated to HSDPA users are redundant according to the measurement results. If there is redundancy, and confirms that the system load occupied by R99 users is high, then reduce the power of HSDPA users P _HS-DSCH or The number N of spreading codes, correspondingly change the power offset Γ=(P _HS-DSCH /N)/P _cpich of each code channel, and then notify each HSDPA user, and re-according to the newly allocated HS-DSCH channel power The number N of P _HS-DSCH and HS-PDSCH channel spreading codes, schedule HSDPA users to transmit data according to the CQI reported by each HSDPA user, and then turn to step D44; otherwise, the system schedules HSDPA users to maintain the original HS-DSCH channel power P Number of _HS-DSCH and HS-PDSCH channel spreading codes N Scheduling data transmission of HSDPA users.

Wherein, before said step D1 includes:

HSDPA users feed back their measured CQI values to the system.

As can be seen from the technical solution provided by the present invention above, the method according to the present invention is based on the power P HS-DSCH of the high-speed downlink shared channel HS _-DSCH allocated by the system, the number N of HS-PDSCH channel spreading codes and the common pilot The transmission power P _cpich of the frequency channel CPICH, determine the transmission power of each code channel, and set the corresponding power offset; the system according to the CQI information reported by each user in the cell, and the determined transmission power of each code channel , and schedule the users accordingly. Through the present invention, each code channel can be used to transmit data with the same power, thereby reducing the uncertainty and complexity of the HSDPA user's transmission power and spreading code resource allocation, and making the HSDPA user's transmission power within a period of time It is possible to keep constant, thereby reducing the impact of HSDPA transmission power fluctuations on CQI measurement; at the same time, due to the simple allocation of user power and code resources, the system can achieve flexible allocation of power and spreading code resources, providing the system for R99 and HSDPA users Furthermore, through the present invention, the power of each user receiving the HS-PDSCH channel is the CPICH signal power measurement plus the power offset Γ, so that when the terminal receives and makes a 16QAM demodulation soft decision, it can directly The measurement of the CPICH channel is used to accurately calculate its relative received power, without the need to measure the relative power offset in real time.

Description of drawings

Fig. 1 is a flow chart of the second embodiment provided by the present invention.

Detailed ways

The present invention provides a method for setting power offset, the core of which is: firstly, according to the power P _HS-DSCH and HS-PDSCH channel spreading code N of the high-speed downlink shared channel HS-DSCH allocated by the system, determine each code channel The corresponding power offset is set according to the transmission power P _cpich of the common pilot channel CPICH allocated by the system and the determined transmission power of each code channel.

The present invention provides a method for system scheduling, the core of which is: according to the power P HS-DSCH of the high-speed downlink shared channel HS- _DSCH allocated by the system, the spreading code N of the HS-PDSCH channel and the transmission power P of the common pilot channel CPICH _cpich , determine the power of each code channel, and set the corresponding power offset; the system performs corresponding scheduling on the users according to the CQI information reported by each user in the cell and the determined transmission power of each code channel.

The first embodiment provided by the present invention is a method for setting a power bias, which includes:

Step 1, determine the transmission power of each code channel according to the power P _HS-DSCH and HS-PDSCH channel spreading code N of the high-speed downlink shared channel HS-DSCH allocated by the system;

The total power of the HS-DSCH allocated by the system to the HSDPA (High Speed Downlink Packet Access) users in a cell is P _HS-DSCH , and the HS-PDSCH (High Speed Physical Downlink Shared Channel, high-speed physical downlink shared channel) expansion The frequency code is N (the maximum possible number of HS-PDSCH code channels transmitted by the cell at the same time), and the transmission power of each code channel is determined as P _HS-DSCH /N.

Step 2: Set the corresponding power offset according to the transmission power P _cpich of the common pilot channel CPICH allocated by the system and the determined transmission power of each code channel.

According to the transmission power P _cpich of the common pilot channel CPICH allocated by the system, and the determined transmission power of each code channel, the reference power offset Γ for channel quality measurement is set for the UE: the total power of HS-DSCH divided by the available allocation The number of HS-PDSCH code channels, relative to the power of the P-CPICH channel, that is, Γ=(P _HS-DSCH /N)/P _cpich .

The second embodiment provided by the present invention is a method for system scheduling based on a set power offset, as shown in FIG. 1 , including:

Step 11. Determine the power of each code channel according to the power P HS-DSCH of the high-speed downlink shared channel HS _-DSCH allocated by the system, the spreading code N of the HS-PDSCH channel, and the transmission power P _cpich of the common pilot channel CPICH, and Set the corresponding power bias.

The specific method is the same as the content of the first embodiment and will not be described in detail.

After the above steps, the system of the present invention can schedule users accordingly according to the CQI information reported by each user in the cell and the corresponding power offset set. The specific implementation process includes the following steps.

Step 12, the HSDPA users feed back their measured CQI values to the system. The CQI value reflects the reference power and the transmission format that guarantees that the initial transmission BLER meets 10% under a single code channel.

Step 13. According to the CQI information reported by each user, the system schedules different code channel numbers M for each user who needs to send data, and makes the total number of HS-PDSCH channel code channels allocated to all users equal to HS-PDSCH Channel spreading code N.

According to the CQI measurement information fed back by each HSDPA (High Speed Downlink Packet Access) user, as well as the data size and delay requirements, the system allocates the number M of HS-PDSCH channels for each user, and the total code The number of channels is N, and users with better channel quality are allocated more HS-PDSCH channels, which can improve the spectral efficiency of the system to a greater extent.

Step 14: Determine the transmit power of the user according to the number M of code channels scheduled for the user and the determined power of each code channel, and allocate it to the user.

The transmit power of the user is equal to the number M of code channels scheduled for the user multiplied by the determined power of each code channel.

Step 15, according to the CQI information reported by each user, allocate the transmission format when the user transmits data. Specifically include:

First, map the CQI information reported by the user to the transmission format of a single code channel;

Then, according to the mapping relationship between the CQI value and the transmission format, and the number M of allocated HS-PDSCH code channels, the length of the data block to be transmitted by the user and the corresponding modulation mode are determined.

The CQI measurement value reflects the best transmission format that satisfies the quality of the channel. The system saves a mapping table from the CQI measurement value to a single code channel transmission format. In the mapping table, the system can map the CQI measurement value to a single code channel. The transmission format of the code channel (transmission block size and modulation method). For example, when the CQI value is equal to 8, the original transmission format corresponds to: block length 792, QPSK modulation, 3 code channels, and the transmission format currently mapped to a single code channel is about It is block length 640, 16QAM modulation.

Since the reference power is set to the power of a single code channel, the variation range of the CQI value fed back by each UE is relatively small, and the adjustment of this transmission format is relatively accurate. The mapping relationship can be provided by the UE. At this time, the UE feeds back the transmission format corresponding to a single code channel. The system and the UE maintain the same mapping table between the CQI measurement value and the transmission format (transport block length and modulation mode) of a single code channel.

According to the mapping table, the system maps the CQI value reported by the scheduling user to the transmission format corresponding to a single code channel. The size of the data transmitted by the scheduling user is equal to the transmission block size when the CQI value is mapped to a single code channel multiplied by the code allocated by the system to the user. The number of channels is M, and the modulation method also adopts the corresponding modulation method, so that the transmission power is equal to the power of a single code channel multiplied by the number of code channels M allocated by the system to the user.

After the above steps, the present invention can schedule user transmission data based on the allocated transmission power and transmission format. The specific implementation process includes the following steps.

Step 16, the system schedules the user to transmit data according to the allocated transmission power and transmission format within a predetermined time period.

Step 17, the system measures the load of the HSDPA user.

Step 18, judge whether the current power resource that the system distributes for each HSDPA user is surplus according to the measurement result, if there is surplus, then perform step 19, promptly reduce the HS-PDSCH channel spreading code N that is distributed for the HSDPA user, and keep every The original power of each code channel remains unchanged, and then according to the newly allocated HS-PDSCH channel spreading code N, schedule the user to transmit data according to the CQI reported by each HSDPA user, and then turn to step 17; otherwise, perform step 20, that is, system scheduling The user transmits data according to the originally allocated HS-PDSCH channel spreading code N within a predetermined time period, and then proceeds to step 17.

For a period of time, the system measures whether the current system power resource allocation is less than the allocated HS-DSCH power P _HS-DSCH . If so, it indicates that the data transmission requirements of the current HSDPA users are insufficient. Therefore, it is necessary to reduce the maximum number of transmission code channels in the cell. Number N, and keep the transmit power of each code channel constant.

After reducing the maximum number of transmission code channels in the cell, when the data load of the current HSDPA user in the measurement cell increases, increase the maximum number of transmission code channels in the cell (not exceeding N), and the transmission power of each code channel remains unchanged. The measurement time period is T1, and the minimum time period for adjustment is T1.

For a period of time, the system tries to send the same HS-DSCH power (the same number of code channels) for each continuous subframe as much as possible. When the system schedules enough user data, the system can fully use the allocated HSDPA power and code resources during scheduling. , when the demand for HSDPA user data transmission is insufficient, the number of HSDPA HS-PDSCH code channels is reduced in real time, and the transmission power is also reduced accordingly.

The third embodiment provided by the present invention is a method for system scheduling based on a set power offset, which includes:

Firstly, the implementation process of step 11 to step 16 in the first embodiment is executed, and then the following steps are executed.

Step 21, the system measures the transmission power allocated for the R99 user and the HSDPA user and the use of code channel resources, as well as the data queue requirement of the current HSDPA user.

Step 22, judge according to the measurement result whether there is redundancy in the transmission power or the code channel resource allocated to the R99 user, if there is, and when the HSDPA user has more data to transmit, then correspondingly increase the power P _HS- of the HSDPA user _DSCH or HS-PDSCH channel spreading code N, correspondingly change the power offset Γ(P _HS-DSCH /N)/P _cpich of each code channel, and then notify each UE, and re-allocate according to the newly allocated HS-DSCH channel Power P _HS-DSCH and HS-PDSCH channel spreading code N, schedule the user to transmit data according to the CQI reported by each HSDPA user, then proceed to step 21; otherwise, perform step 23;

Step 23, the system judges whether the power or the code channel resources allocated for the HSDPA users are redundant according to the measurement results, if there is, and the R99 users occupy a higher system load, then reduce the power P _HS-DSCH or HS-PDSCH of the HSDPA users Channel spreading code N, correspondingly change the power offset Γ(P _HS-DSCH /N)/P _cpich of each code channel, and then notify each UE, and re-according to the newly allocated HS-DSCH channel power P _HS-DSCH and HS-PDSCH channel spreading code N, according to the CQI reported by each HSDPA user, schedules the user to transmit data, and then turns to step 23; otherwise, the system schedules the user to keep the original HS-DSCH channel power P _{HS- DSCH} and HS-PDSCH channel spreading code N schedules data transmission of HSDPA users.

The system can determine the specific allocation strategy of the power and spread code resource ratio of R99 and HSDPA users according to the size and priority of the business.

The system measures the usage of the power and code resources allocated for R99 users and HSDPA users, and reduces and increases the power of HSDPA users or HS-PDSCH channel spreading code resources according to the business size and priority strategy. Each HS-PDSCH code The power of the channel is equal to the reallocated P _{HS- DSCH} /N, the measurement time period is T2, and the minimum time period for adjustment is T2.

Since the same power is allocated to each code channel, it is possible to flexibly combine power and spreading code channel resources. When the power is sufficient but the code resources are insufficient, the data transmission is realized by increasing the coding rate; otherwise, the low coding rate can be used. gain. When the system passes the measurement and the HSDPA user data transmission requirements of the cell are insufficient, the system should reduce the HSDPA power and the number of code channels.

The system allocates relatively stable power and HS-PDSCH channel spreading code resources for R99 users and HSDPA users, and reconfigures according to the use of transmission service resources of R99 users and HSDPA users through periodic measurement over a period of time: when the power required by R99 users When resources or HS-PDSCH channel spreading code resources are insufficient, HSDPA users can reduce the power or HS-PDSCH channel spreading code resources, the power of each HSDPA code channel is adjusted accordingly, and the new power offset Γ is notified to For UE, the entire HSDPA data transmission is scheduled according to the new CQI measurement value; when the power resources required by HSDPA users or the HS-PDSCH channel spreading code resources are insufficient, the system can allocate more power resources or HS-PDSCH channels for HSDPA users The spreading code resource and the new power offset Γ are notified to the UE through reconfiguration, and the entire HSDPA data transmission is scheduled according to the new CQI measurement value.

As can be seen from the specific embodiments of the present invention described above, it has the following beneficial effects:

Through the present invention, the power of each user receiving the HS-PDSCH channel is CPICH signal power measurement plus a power offset Γ, so that when the terminal receives and makes a 16QAM demodulation soft decision, it directly calculates its relative value directly through the measurement of the CPICH channel Receive power without the need to measure relative power offsets in real time.

In addition, the present invention determines the power of each code channel according to the power P HS-DSCH of the high-speed downlink shared channel HS _-DSCH allocated by the system, the spreading code N of the HS-PDSCH channel, and the transmission power P _cpich of the common pilot channel CPICH , so that each code channel can send data with the same power, which can reduce the uncertainty and complexity of HSDPA user power and spreading code resource allocation, and make it possible for HSDPA users to maintain a constant transmission power for a period of time , so as to reduce the impact of HSDPA transmission power fluctuations on CQI measurement. At the same time, due to the simple allocation of user power and code resources, the system can achieve flexible allocation of power and spreading code resources, providing dynamic resources for the system between R99 and HSDPA users Management is possible.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present invention can easily think of changes or Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (9)

1, a kind of method that power bias is set is characterized in that, comprising:

A, according to the power P of the high speed downlink shared channel HS-DSCH of system assignment _HS-DSCHWith the number N of the spreading code of high-speed physical downlink shared channel (HS-PDSCH) HS-PDSCH, the transmitted power of determining each code channel is P _HS-DSCH/ N;

B, according to the transmitted power P of the Common Pilot Channel CPICH of system assignment _Cpich, and the transmitted power of described definite each code channel, power bias Γ=(P that corresponding C QI measures is set _HS-DSCH/ N)/P _Cpich

2, a kind of method of carrying out system call is characterized in that, comprising:

C, according to the power P of the HS-DSCH of system assignment _HS-DSCHWith the number N of the spreading code of HS-PDSCH channel, the transmitted power of determining each code channel is P _HS-DSCH/ N; Transmitted power P according to the CPICH of system assignment _Cpich, and the transmitted power of described definite each code channel, power bias Γ=(P that corresponding C QI measures is set _HS-DSCH/ N)/P _Cpich

D, system be according to the CQI information of each reporting of user in this sub-district, and the transmitted power of described definite each code channel, and the user is dispatched accordingly.

3, method according to claim 2 is characterized in that, described step D specifically comprises:

D1, system are respectively each user that need send data and dispatch different code channel number M according to the CQI information of each reporting of user, and make total code channel number of distributing for all users equal the number N of spreading code;

D2, determine described user's transmitted power, and it is distributed to described user according to the transmitted power of the code channel number M of dispatching and described definite each code channel for the user;

D3, the transformat when transmitting data for described user according to the CQI information distribution of each reporting of user;

D4, based on described transmitted power of distributing and transformat dispatched users transmission data.

4, method according to claim 3 is characterized in that, among the step D2, the described transmitted power process of determining described user comprises:

Described user's transmitted power equals the transmitted power that code channel number M for user scheduling multiply by described definite each code channel.

5, method according to claim 3 is characterized in that, described step D3 specifically comprises:

D31, with the CQI information mapping of described reporting of user to the transformat of single code channel;

D32, according to the mapping relations of CQI value and transformat, and the code channel number M of distributing determines that the user needs data block transmitted length and corresponding modulation system.

6, according to claim 3,4 or 5 described methods, it is characterized in that described step D4 specifically comprises:

D41, system call user are transmitted data according to described transmitted power of distributing and transformat in the preset time section.

7, method according to claim 6 is characterized in that, described step D41 comprises:

D42, systematic survey HSDPA user's load;

D43, judge according to measurement result whether system has surplus for the current power resource that HSDPA user distributes, if surplus is arranged, then be reduced to the number N of the HS-PDSCH channel spread sign indicating number of HSDPA user's distribution, and keep the original power of each code channel constant, and again according to the number N of newly assigned HS-PDSCH channel spread sign indicating number, CQI scheduling HSDPA user according to each HSDPA reporting of user transmits data, changes step D42 subsequently over to; Otherwise system call HSDPA user according to the HS-PDSCH channel spread sign indicating number N transmission data of original distribution, changes step D42 over to then in the preset time section.

8, method according to claim 6 is characterized in that, described step D41 comprises:

D44, systematic survey are R99 user and the transmitted power of HSDPA user's distribution and the operating position of code channel resource, and the demand of current HSDPA user's data formation;

D45, be judged as transmitted power or the code channel resource that R99 user distributes according to measurement result whether redundancy is arranged, if having, and HSDPA user has more data to need to transmit, and then increases HSDPA user's power P accordingly _HS-DSCHOr the number N of HS-PDSCH channel spread sign indicating number, correspondingly change the power bias Γ=(P of each code channel _HS-DSCH/ N)/P _Cpich, notify each HSDPA user then, and again according to newly assigned HS-DSCH channel power P _HS-DSCHWith the number N of HS-PDSCH channel spread sign indicating number, transmit data according to the CQI scheduling HSDPA user of each HSDPA reporting of user, change step D44 subsequently over to; Otherwise, execution in step D46;

Whether D46, system are judged as power or the code channel resource that HSDPA user distributes according to measurement result redundancy, if redundancy is arranged, and when confirming that the system load of R99 CU is higher, then reduces HSDPA user's power P _HS-DSCHOr the number N of spreading code, correspondingly change the power bias Γ=(P of each code channel _HS-DSCH/ N)/P _Cpich, notify each HSDPA user then, and again according to newly assigned HS-DSCH channel power P _HS-DSCHWith the number N of HS-PDSCH channel spread sign indicating number, transmit data according to the CQI scheduling HSDPA user of each HSDPA reporting of user, change step D44 subsequently over to; Otherwise system call HSDPA user keeps original HS-DSCH channel power P in the preset time section _HS-DSCHSend with the number N scheduling HSDPA user's data of HS-PDSCH channel spread sign indicating number.

9, method according to claim 3 is characterized in that, comprises before described step D1:

Each self-metering CQI value of HSDPA user feedback is to system.

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