CN101106403A - A method and device for adjusting transmission power of HSPA downlink physical channel - Google Patents
A method and device for adjusting transmission power of HSPA downlink physical channel Download PDFInfo
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Abstract
The invention discloses a regulation HSPA downlink physical channel transmission power method which comprises the steps: user power regulation parameter is determined in accordance with the user channel quality; the HSPA downlink physical channel transmission power is adjusted according to the user power regulation parameter. The embodiment of the invention takes the consideration of the influence to the HSPA downlink physical channel transmission power of the user channel quality, which enhances the adjustment effect of the user HSPA downlink physical channel transmission power, decreases the disturbance to the neighboring block, and optimizes the overall performance of the system.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for adjusting HSPA downlink physical channel transmission power.
Background
The HSPA (High Speed Packet Access) technology is a natural upgrade of WCDMA (Wideband Code Division Multiple Access), and compared with the existing WCDMA technology, HSPA can provide services for more High-rate users on the same radio carrier frequency. HSPA is classified into HSDPA (High Speed Downlink Packet Access) and HSUPA (High Speed Uplink Packet Access).
The basic idea of HSDPA is to establish a high-speed shared transmission Channel to improve the data transmission rate, and allocate scheduling resources to a User by using a Channel Quality indication CQI (Channel Quality Indicator), an ACK/NACK (Acknowledgement/Negative Acknowledgement) message, a Quality of Service (QoS) parameter, and the like, which are fed back from a User Equipment (User terminal), so as to provide a maximum downlink throughput for the system. In the WCDMA system, three channels are added in the introduction of the HSDPA, which are an HS-PDSCH (High Speed Physical Downlink Shared Channel) Channel for transmitting data information in a Downlink, an HS-SCCH (High Speed Shared Control Channel) Channel for transmitting Downlink Control information, and an HS-DPCCH (High Speed Dedicated Physical Control Channel) Channel for transmitting uplink feedback information.
HSUPA is yet another important new feature in WCDMA standard, which introduces the techniques in the uplink as: hybrid Automatic Repeat request HARQ (ryhybrid Automatic Repeat Req user st), fast scheduling of a base station and a short frame of 2ms and 10ms, and introduces a code word of SF =2, thereby improving the limit capability of the available physical channel capacity of a user. HSUPA introduces five physical channels, where the uplink channels are: E-DPDCH (E-DCH Dedicated Physical Data Channel ), E-DPCCH (E-DCH Dedicated Physical Control Channel, E-DCH Dedicated Physical Control Channel), and the downlink channels are: E-HICH (E-DCH Hybrid ARQ Indicator Channel, E-DCH fast retransmission Indicator Channel), E-RGCH (E-DCH Relative Grant Channel ), E-AGCH (E-DCH Absolute Grant Channel, E-DCH Absolute Grant Channel).
In order to reduce the mutual interference between cells and improve the system performance, in WCDMA system, a certain limitation is usually performed on the transmission power of each cell, and accordingly, the downlink transmission power of each user is limited.
The total downlink power transmitted by the HSDPA is equal to the sum of the total power of the HS-SCCH channel and the total power of the HS-PDSCH channel. The existing power distribution method of HSDPA downlink physical channels is that the maximum transmission power is divided into two parts according to a fixed proportion and distributed to an HS-SCCH channel and an HS-PDSCH channel respectively. Because the HS-SCCH channel cannot adapt to the change of the channel quality by reducing the transmitted data and changing the modulation scheme like the HS-PDSCH channel, the power of the HS-SCCH channel cannot be adjusted according to the specific situation after each allocation. Specifically, when the channel quality deteriorates, the power of the HS-SCCH channel cannot meet the requirement of the user for demodulating data, and the transmitted data cannot be correctly demodulated, resulting in a failure in transmitting data to the user; when the channel quality is good, the redundant part of the HS-SCCH channel power cannot be distributed to the HS-PDSCH channel, so that the data volume sent by the HS-PDSCH channel is increased, and the power waste is caused.
There are generally two methods for controlling the transmit power of the HSUPA downlink physical channel:
the method comprises the following steps: the method has the advantages that the method is simple, but the flexibility is insufficient, and the method cannot be changed along with the change of the user and the environment of the cell;
the method 2 comprises the following steps: as defined in the protocol 3gpp TS 25.433, the E-AGCH, the ERGCH and the E-HICH channels are configured by the system with Power offsets relative to the Transmit Power of the downlink DPCCH (Dedicated Physical Control Channel) TPC (Transmit Power Control) domain, respectively, so that the Transmit powers of the three downlink Physical channels HSUPA are controlled by the Transmit Power of the downlink DPCCH TPC domain. However, the method has a poor effect of controlling power because the variation of the channel quality reflected by the variation of the TPC field transmission power is not accurate.
Disclosure of Invention
The problem to be solved in the embodiments of the present invention is to provide a method and an apparatus for more effectively adjusting the transmission power of a HSPA downlink physical channel, which can adjust the power of the downlink physical channel in time according to the change of the quality of the downlink physical channel.
In order to achieve the object, an embodiment of the present invention provides a method for adjusting HSPA downlink physical channel transmission power, including the following steps: determining a user power adjustment parameter according to the user channel quality; and adjusting the transmitting power of the HSPA downlink physical channel according to the user power adjustment parameter.
In order to achieve the above object, an embodiment of the present invention further provides a device for adjusting HSPA downlink physical channel power, including a power adjustment parameter determining module and a transmission power adjustment module, where the power adjustment parameter determining module is configured to determine a user power adjustment parameter according to a user channel quality; and the transmission power adjusting module is used for adjusting the transmission power of the HSPA downlink physical channel according to the user power adjusting parameter determined by the power adjusting parameter determining module.
Compared with the prior art, the embodiment of the invention has the following advantages: the embodiment of the invention considers the influence of the channel quality on the HSPA downlink physical channel transmitting power, improves the adjusting effect of the transmitting power of the downlink physical channel of the HSPA of the user, reduces the interference of the system on the adjacent cell and optimizes the overall performance of the system.
Drawings
Fig. 1 is a structural diagram of a device for adjusting HSPA downlink physical channel transmission power according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for adjusting HSPA downlink physical channel transmission power according to an embodiment of the present invention;
fig. 3 is a flowchart of a method for adjusting the transmit power of an HSUPA downlink physical channel according to a third embodiment of the present invention;
fig. 4 is a flowchart of a method for adjusting the transmit power of an HSDPA downlink physical channel according to a fifth embodiment of the present invention;
fig. 5 is a flowchart of a method for adjusting the transmit power of an HSDPA downlink physical channel according to a sixth embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the invention is provided in connection with the accompanying drawings and examples:
the method and the device for adjusting the transmission power of the HSPA downlink physical channel can be independently applied to an HSDPA system, an HSUPA system and an HSPA system combining the HSDA system and the HSUPA system. The embodiment of the invention can adopt the same power adjustment method and device for the three systems, for example, the transmission power of the downlink physical channel is adjusted according to the quality of the user channel. The idea of the embodiment of the invention is that the base station measures the downlink channel quality of the user through the channel parameter capable of reflecting the downlink channel quality, and adjusts the power of the downlink physical channel according to the downlink channel quality, thereby optimizing the system performance. The channel quality can be reflected by various channel parameters, and can be not only a channel quality indicator CQI reported by a user to the base station, but also channel parameters such as a transmission rate, an error rate, a signal-to-noise ratio, and the like obtained by the base station detecting a current channel of the user. Or the base station may reflect the channel quality according to the number of the acknowledgment information of the user and the number of times of retransmission of the user, because if the base station feeds back the acknowledgment information to the user, which indicates that the base station has received a correct message, but the user still retransmits the message, which indicates that the user may not receive the acknowledgment information fed back by the base station because the current downlink channel is not good, the corresponding channel quality can be reflected by the number of the user acknowledgment information and the number of times of retransmission of the user.
In summary, the embodiments of the present invention may directly utilize the parameter capable of reflecting the channel quality to adjust the HSPA downlink physical channel transmission power, and may also calculate the corresponding user power adjustment parameter by reflecting the corresponding channel quality together through the combination of the parameters capable of reflecting the channel quality, for example, calculate the user power adjustment parameter through the number of the user acknowledgement information, the user retransmission times, and the reported channel quality indicator CQI. Therefore, any variation of the signal quality parameter should be covered by the protection scope of the embodiment of the present invention.
Fig. 1 is a structural diagram of a HSPA downlink physical channel power adjusting device according to an embodiment of the present invention. The HSPA downlink physical channel power adjusting device comprises a power adjusting parameter determining module 1 and a transmitting power adjusting module 2, wherein the power adjusting parameter determining module 1 is used for determining a user power adjusting parameter according to the user channel quality; the transmission power adjusting module 2 is configured to adjust the transmission power of the HSPA downlink physical channel according to the user power adjustment parameter determined by the power adjustment parameter determining module 1.
Wherein, the power adjustment parameter determining module 1 comprises a reporting channel quality determining submodule 11 for demodulating the HS-DPCCH channel to obtain the channel quality indicator CQI of the user, and calculating the channel quality CQI of the user according to the CQI and the capability grade Cat of the user cur And according to the current channel quality CQI cur Calculating a channel quality average CQI avg According to the channel quality average value CQI avg And calculating a power adjustment parameter USER. In which the CQI and the user are basedCapability level Cat calculates channel quality CQI of user cur The method is a better implementation manner, and the current channel quality can be reflected only by the CQI, so that the calculation of the power adjustment parameter USER only by the CQI is also covered by the protection scope of the embodiment of the present invention.
The power adjustment parameter determining module 1 further includes a number determining submodule 12, configured to determine, according to the number Num of the confirmation information sent to the user, the number Num ack And the number Num of the next uplink frames which are still retransmission frames and are received after the confirmation information is sent retrans And calculating a power adjustment parameter USER. The reporting channel quality determining submodule 11 and the number determining submodule 12 provided in the embodiment of the present invention may be used to calculate the power adjustment parameter USER alone, or may be used to calculate the power adjustment parameter USER in combination. E.g. based on acknowledgement messages sent to the userNumber Num ack And the number Num of the next uplink frame which is still the retransmission frame and is received after the confirmation information is sent retrans And/or average value CQI avg And calculating a power adjustment parameter USER. Wherein the formula is specifically as follows:
wherein w 1 、w 2 Is a scale factor.
The transmission power adjusting module 2 includes a maximum value calculating submodule 21, configured to adjust the transmission power of the HSPA downlink physical channel to a product of a function of the power adjustment parameter USER and the maximum transmission power of the HSPA downlink physical channel. For example, by the following formula: p is E-RGCH ＝g(USER)·P RGCH_MAX Wherein g () is a monotone non-decreasing function, which can be implemented according to specific situations, and can be a table obtained according to actual measurement statistics, or a certain linear or non-linear function, but all should satisfy 0 < g () < 1.
The transmission power adjusting module 2 includes a minimum value calculating submodule 22, configured to adjust the transmission power of the HSPA downlink physical channel to be the sum of the product of the function of the power adjustment parameter USER and the power adjustment basic step size and the minimum transmission power of the HSPA downlink physical channel. Such as a cartoonObtained by the following formula: p is HS-SCCH ＝m(USER)·ΔPwr base +P HS-SCCH_MIN Wherein m () is a monotone non-decreasing function, which can be realized according to specific situations, and can be a table obtained according to actual measurement statistics, or a certain linear or non-linear function, but all should satisfy
Fig. 2 is a flowchart of a method for adjusting the transmit power of the HSPA downlink physical channel according to an embodiment of the present invention, which is applicable not only to the HSPA system but also to an independent HSUPA or HSDPA system. The method for adjusting the transmission power of the HSPA downlink physical channel in the embodiment of the invention specifically comprises the following steps:
step S201, demodulating HS-DPCCH to obtain user 'S channel quality indication CQI, wherein, the channel quality can be reflected by various channel parameters, not only the CQI reported by the user to the base station, but also the channel parameters such as transmission rate, bit error rate and signal-to-noise ratio obtained by the base station detecting the current channel of the user, or the user' S channel quality is reflected by the number of user confirmation information and the user retransmission times.
Step S202, determining a user power adjustment parameter according to the number of the user confirmation information, the user retransmission times and/or the reported average value of the Channel Quality Indicator (CQI). The embodiment of the invention can determine the user power parameter through the number of the user confirmation information and the user retransmission times, can also determine the user power adjustment parameter through the reported average value of the channel quality indicator CQI, or determine the user power parameter through the combination of the two.
Step S203, adjusting the transmitting power of the HSPA downlink physical channel according to the user power adjustment parameter. The embodiment of the invention can adjust the transmitting power of the HSPA downlink physical channel in two modes, not only can adjust according to the maximum transmitting power of the downlink channel, but also can adjust according to the minimum transmitting power of the downlink channel.
The embodiment of the invention utilizes the CQI information and/or the number of the user confirmation information carried by the HS-DPCCH channel and the retransmission times of the user to measure the channel quality of the downlink physical channel of the user HSPA, thereby adjusting the transmission power of the downlink physical channel of the user HSPA, reducing the interference of the system to the adjacent cell and optimizing the performance of the system.
The invention is further illustrated by the following examples in combination with the accompanying drawings:
the embodiment of the invention provides a method for adjusting the transmitting power of an HSUPA downlink physical channel, which specifically comprises the following steps:
the base station acquires the channel quality CQI of the user terminal user by demodulating the HS-DPCCH cur And through the channel quality CQI of the user cur Calculating the average value CQI of the channel quality CQI of the user avg In particular, the CQI can be obtained by the formula cur = f (CQI, cat) to calculate CQI cur Wherein f () is a function of CQI and Cat, the implementation manner is determined according to specific situations, and may be a table obtained according to actual measurement statistics, or may be a certain linear or nonlinear function, and passes through a formula
Calculating an intermediate parameter USER U As a power adjustment parameter, where w 1 Is a scale factor, and the value range is 0 < w 1 < 1, for example, may take w 1 =0.1. Transmitting power of HSUPA downlink physical channel according to the power adjustment parameterThe rate is adjusted. Wherein the channel quality CQI of a user is calculated from the CQI and the capability level Cat of the user cur Is a better implementation mode, can reflect the current channel quality only through the CQI, and therefore, the power adjustment parameter USER is calculated only through the CQI U But also should be covered by the scope of the embodiments of the present invention.
The second embodiment of the present invention provides a method for adjusting the transmit power of an HSUPA downlink physical channel, which specifically includes:
the base station acquires the number Num of user acknowledgement information ACK sent to the user ack And after sending ACKThe number Num of retransmission times of the user whose received next uplink frame is still the retransmission frame retrans By the formula
Calculating an intermediate parameter USER U As a power adjustment parameter, where w 2 Is a proportional factor, and the value range is 0 < w 2 < 1, for example, may take w 2 =0.1. And adjusting the transmitting power of the HSUPA downlink physical channel according to the power adjustment parameter.
As shown in fig. 3, a flowchart of a method for adjusting the transmit power of an HSUPA downlink physical channel according to a third embodiment of the present invention specifically includes the following steps:
in step S301, the base station obtains the channel quality indicator CQI of the user by demodulating the HS-DPCCH channel, where the channel quality may be reflected by various channel parameters, and may be not only the channel quality indicator CQI reported by the user to the base station, but also channel parameters such as transmission rate, error rate, and signal-to-noise ratio obtained by the base station detecting the current channel of the user, or reflect the channel quality of the user by the number of user acknowledgement information and the number of user retransmissions.
Step S302, measuring the channel quality CQI obtained by the user end according to the CQI and the capability grade Cat of the user cur In particular, the CQI can be formulated cur = f (CQI, cat) to calculate CQI cur Wherein f () is a function of CQI and Cat, and the implementation manner thereof is determined according to specific situations, and may be a table obtained according to actual measurement statistics, or may be a certain linear or nonlinear function. Obtaining channel quality CQI of user terminal cur Then, an average value CQI of the channel quality of the user terminal is acquired avg The average calculation can use various smoothing filter calculation methods, not limited to but only one example, to smooth the current measurement using a first order alpha filter, resulting in: CQI avg ＝α·CQI cur +(1-α)·CQI avg Wherein α may be of a sizeTo be determined by actual conditions, for example, α =0.1 may be set. Where the CQI is based on the capability of the user, etcLevel Cat calculates channel quality CQI of user cur Is a better implementation mode, can reflect the current channel quality only through the CQI, and therefore, the power adjustment parameter USER is calculated only through the CQI U But also should be covered by the scope of the embodiments of the present invention.
Step S303, the base station acquires the number Num of ACK sent to the user ack And the number Num of the next uplink frame which is still a retransmission frame and is received after the ACK is sent retrans Then calculating the intermediate parameter USER U As the power adjustment parameter, the specific calculation method is as follows:wherein w 1 、w 2 As a scale factor, w must be satisfied 1 +w 2 =1, the value of which is determined by simulation or actual measurement according to specific application scenarios, for example, w may be set 1 ＝0.9，w 2 ＝0.1。
Step S304, utilizing the power adjustment parameter USER obtained in the above step U And adjusting the actual transmission power of the downlink physical channel of the user HSUPA. For HSUPA users, the downlink physical channels mainly include: E-AGCH, E-RGCH and E-HICH channels, e.g., let the maximum transmit power of the E-RGCH, E-HICH and E-AGCH channels of a user be P RGCH_MAX 、P HICH_MAX 、 P AGCH_MAX Then the actual transmit power of the user may be:
P E-RGCH ＝g(USER U )·P RGCH_MAX
P E-HICH ＝h(USER U )·P HICH_MAX
P E-AGCH ＝k(USER U )·P AGCH_MAX
wherein g (), h (), k () are monotone non-decreasing functions, the implementation mode is determined according to specific situations, and can be a table obtained according to actual measurement statistics, or a certain linear or nonlinear function, but all the functions are required to be 0 < g (), h (), k () < 1.
The same example of the invention can also pass the minimum value pair of the transmitting power of the channelThe E-AGCH, E-RGCH and E-HICH channels are adjusted, e.g. P E-HIGH ＝m(USER U )·ΔPwr base +P E-HIGH-MIN Wherein m () is a monotone non-decreasing function, which can be realized according to specific situations, and can be a table obtained according to measured statistics, or a certain linear or non-linear function, but all should satisfy
By using the CQI information carried by the HS-DPCCH channel and/or the number of the user confirmation information and the retransmission times of the user, the quality of the HSUPA downlink physical channel of the user can be measured, the transmitting power of the HSUPA downlink physical channel of the user can be adjusted, the interference of the system to the adjacent cell can be reduced, and the performance of the system can be optimized.
The three embodiments described above specifically describe the method for adjusting the transmit power of the HSUPA downlink physical channel according to the number of the user acknowledgement messages and the number of user retransmissions and/or the reported CQI. The downlink physical channel is adjusted according to the number of the user confirmations and the number of times of user retransmission and/or the reported channel quality indicator CQI, which is only an example to make the technical solution reflected in the embodiment of the present invention more clearly understood, but the embodiment of the present invention should not be limited to reflecting the channel quality only according to the number of the user confirmations and the number of times of user retransmission and/or the reported channel quality indicator CQI. By the above method, any parameter capable of reflecting the channel quality can be used to adjust the transmission power of the downlink physical channel by the above steps and formula. For example, the transmission power of the downlink physical channel is adjusted by the number of the user confirmation information, the user retransmission times and the signal-to-noise ratio of the channel.
The embodiment of the present invention may also adjust the transmission power of the HSDPA downlink physical channel by the same method as the above three embodiments, which is specifically described in the following embodiments.
The fourth embodiment of the invention provides a method for adjusting the transmitting power of an HSDPA downlink physical channel, which specifically comprises the following steps:
the base station acquires the channel quality CQI of the user terminal user by demodulating the HS-DPCCH cur And through the channel quality CQI of the user cur Calculating the average value CQI of the channel quality CQI of the user avg By the formula
Calculating an intermediate parameter USER D As a power adjustment parameter, where w 1 Is a proportional factor, and the value range is 0 < w 1 < 1, for example, may take w 1 =0.1. And adjusting the transmitting power of the HSDPA downlink physical channel according to the power adjusting parameter. The channel quality can be reflected by various channel parameters, and not only can be the channel quality indicator CQI reported by the user to the base station, but also can be the CQIThe base station may detect channel parameters such as transmission rate, bit error rate, signal-to-noise ratio and the like obtained by the current channel of the user, or reflect the channel quality of the user through the number of user confirmation information and the user retransmission times.
As shown in fig. 4, a flowchart of a method for adjusting the transmit power of an HSDPA downlink physical channel according to the fifth embodiment of the present invention specifically includes the following steps:
step S401, the base station obtains the number Num of the user acknowledgement information ACK sent to the user ack And the retransmission times Num of the user of the next uplink frame which is still the retransmission frame after the ACK is sent retrans 。
Step S402, according to the number Num of the confirmation messages sent to the user ack And the number Num of the next uplink frame received after the ACk is sent and still being the retransmission frame retrans Calculating an intermediate parameter USER D As the power adjustment parameter, the specific calculation method is as follows:
wherein w 2 Is a scale factor, and the value range is 0 < w 2 E.g.. Ltoreq.1, may be taken as 2 ＝1。
Step S403, utilizing the power adjustment parameter USER obtained in the above step D Implementation of downlink physical channel for user HSDPAThe inter-transmit power is adjusted. For HSDPA users, the downlink physical channel mainly includes: HS-SCCH and HS-PDSCH channels, for example, let the minimum transmission power of HS-SCCH and HS-PDSCH channel of user be P HS-SCCH_MIN 、P HS-PDSCH_MIN Basic step size of power adjustment is Δ Pwr base Then the actual transmit power of the user may be:
P HS-SCCH ＝m(USER D )·ΔPwr base +P HS-SCCH_MIN
P HS-PDSCH ＝n(USER D )·ΔPwr base +P HS-PDSCH_MIN
wherein m () and n () are monotone non-decreasing functions, which can be realized according to specific situations, and can be tables obtained according to actual measurement statistics, or some linear or non-linear function, but all should satisfy 
As shown in fig. 5, a flowchart of a method for adjusting the transmit power of an HSDPA downlink physical channel according to a sixth embodiment of the present invention is provided, where the embodiment provides a method for calculating an actual power value by using a maximum value or a minimum value of downlink channel power, and specifically includes the following steps:
in step S501, the base station obtains a channel quality indicator CQI of the user by demodulating the HS-DPCCH channel, where the channel quality may be reflected by various channel parameters, which may be not only the channel quality indicator CQI reported by the user to the base station, but also channel parameters such as a transmission rate, an error rate, and a signal-to-noise ratio obtained by the base station detecting the current channel of the user, or the channel quality of the user is reflected by the number of user acknowledgement information and the number of user retransmissions.
Step S502, according to CQI and the capability grade Cat of the user, measuring the channel quality CQI obtained by the user terminal cur In particular, the CQI can be formulated cur = f (CQI, cat) to calculate CQI cur Wherein f () isThe implementation manner of the function of CQI and Cat may be determined according to specific situations, and may be a table obtained according to actual measurement statistics, or may be a certain linear or nonlinear function. Obtaining channel quality CQI of user terminal cur Then, it is also necessary to obtain the average CQI of the channel quality of the user terminal avg The average calculation may utilize various smoothing filter calculation methods, not limited to but only one example, that is, smoothing the current measurement with a first order alpha filter, the result is: CQI avg ＝α·CQI cur +(1-α)·CQI avg Where α may be determined according to actual conditions, for example, α =0.1 may be set. The channel quality CQI of the user is calculated according to the CQI and the capability level Cat of the user cur Is a better implementation way, the current channel quality can be reflected only by the CQI, so the power adjustment parameter USER is calculated only by the CQI D But also should be covered by the scope of the embodiments of the present invention.
Step S503, the base station acquires the number Num of ACK sent to the user ack And the number Num of the next uplink frame which is still the retransmission frame and is received after the ACK is sent retrans Then calculating the intermediate parameter USER D As the power adjustment parameter, the specific calculation method is as follows:
wherein w 1 、w 2 As a scale factor, it is necessary to satisfy w 1 +w 2 =1, the value of which is determined by simulation or actual measurement according to specific application scenarios, for example, w may be set 1 ＝0.1，w 2 ＝0.9。
Step S504, the power adjustment parameter USER obtained in the above step is used D And adjusting the actual transmission power of the downlink physical channel of the HSDPA of the user. For HSDPA users, the downlink physical channels mainly include: HS-SCCH and HS-PDSCH channels, e.g. HS-SCCH for a given userAnd the maximum transmission power of the HS-PDSCH channel is P HS-SCCH_MAX 、P HS-PDSCH_MAX Then the actual transmit power for that user may be:
P HS-SCCH ＝h(USER D )·P HS-SCCH_MAX
P HS-PDSCH ＝l(USER D )·P HS-PDSCH_MAX
wherein h () and l () are monotone non-decreasing functions, the implementation manner of which is determined according to specific situations, can be a table obtained according to actual measurement statistics, or a certain linear or nonlinear function, but all should satisfy 0 < j (), and l () < 1.
Of course, the embodiment of the present invention may also calculate the actual transmit power of the user according to the minimum value of the downlink channel power, for example, the actual transmit power of the user may be:
P HS-SCCH ＝m(USER D )·ΔPwr base +P HS-SCCH_MIN
P HS-PDSCH ＝n(USER D )·ΔPwr base +P HS-PDSCH_MIN
where m (), n () are monotone non-decreasing functions, which can be implemented according to specific situations, and can be a table obtained according to actual measurement statistics, or some linear or non-linear function, but all should satisfy
By using the CQI information carried by the HS-DPCCH channel and/or the number of the user confirmation information and the retransmission times of the user, the quality of the HSDPA downlink physical channel of the user can be measured, the transmitting power of the HSDPA downlink physical channel of the user can be adjusted, the interference of the system to the adjacent cell can be reduced, and the performance of the system can be optimized.
The embodiment of the invention considers the influence of the channel quality on the HSPA downlink physical channel transmitting power, improves the adjusting effect of the transmitting power of the user HSPA downlink physical channel, reduces the interference of the system to the adjacent cell and optimizes the overall performance of the system. The embodiment of the present invention further provides various channel parameters capable of reflecting channel quality, such as a channel quality indicator CQI reported by a user to a base station, channel parameters such as a transmission rate, an error rate, and a signal-to-noise ratio obtained by the base station detecting a current channel of the user, and a transmission power of a downlink physical channel that can be adjusted by the channel parameters through the number of user acknowledgement information, the number of user retransmission times, and the like. The above disclosure is only for a few specific embodiments of the present invention, but the present invention is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (16)
1. A method for adjusting HSPA downlink physical channel transmission power is characterized by comprising the following steps:
determining a user power adjustment parameter according to the user channel quality;
and adjusting the transmitting power of the HSPA downlink physical channel according to the user power adjustment parameter.
2. The method according to claim 1, wherein the determining the user power adjustment parameter according to the user channel quality specifically comprises:
and determining the user power adjustment parameter according to the number of the user confirmation information, the user retransmission times and/or the average value of the channel quality indicator CQI reported by the user.
3. The method of claim 2, wherein the determining the user power adjustment parameter according to the number of the user acknowledgement messages, the number of user retransmissions, and an average value of Channel Quality Indicators (CQIs) reported by the users specifically comprises the following steps:
demodulating an HS-DPCCH to obtain a Channel Quality Indicator (CQI) reported by a user;
calculating the channel quality CQI of the user according to the CQI and the capability grade Cat of the user cur And according to the CQI cur Calculate its averageMean CQI avg ；
According to the number Num of the confirmation information sent to the user ack And the number ANum of the next uplink frame which is still a retransmission frame after the confirmation information is sent retrans And the average value CQI avg And calculating a power adjustment parameter USER.
4. The method according to claim 3, wherein the channel quality CQI of the user is calculated according to the CQI and the capability class Cat of the user cur Specifically, the method comprises the following steps: calculating the CQI as a function of the CQI and a capability level Cat cur Wherein CQI cur ＝f(CQI，Cat)。
5. The method of claim 3, wherein the adjusting the transmission power of the HSPA downlink physical channel is performed according to the CQI cur Calculating its average value CQI avg The method specifically comprises the following steps: calculating the average CQI by using a smoothing filter avg 。
6. The method according to claim 5, wherein the method for adjusting the transmission power of the HSPA downlink physical channel is characterized in thatIn that the smoothing filter is a first order alpha filter, the CQI avg ＝αCQI cur +(1-α)CQI avg 。
7. The method of claim 3, wherein the number Num of the acknowledgement messages sent to the user is used as the basis for adjusting the transmission power of the HSPA downlink physical channel ack And the number Num of the next uplink frame which is still the retransmission frame and is received after the confirmation information is sent retrans And the average value CQI avg The specific steps for calculating the power adjustment parameter USER are as follows:
wherein w 1 、w 2 Is a scale factor.
8. The method according to claim 3, wherein the power adjustment parameter USER specifically includes: HSDPA downlink physical channel power regulation parameter USER D Or HSUPA downlink physical channel power regulation parameter USER U 。
9. The method according to claim 1, wherein the adjusting the transmission power of the HSPA downlink physical channel according to the power adjustment parameter specifically comprises: and adjusting the transmission power of the HSPA downlink physical channel to be the product of the function of the power adjustment parameter and the maximum transmission power of the HSPA downlink physical channel.
10. The method according to claim 1, wherein the adjusting the transmission power of the HSPA downlink physical channel according to the power adjustment parameter specifically comprises: and adjusting the transmission power of the HSPA downlink physical channel to be the sum of the product of the function of the power adjustment parameter and the basic step size of power adjustment and the minimum transmission power of the HSPA downlink physical channel.
11. The method according to any of claims 1 to 10, wherein the HSPA downlink physical channel specifically comprises an HSDPA downlink physical channel or an HSUPA downlink physical channel.
12. A device for adjusting HSPA downlink physical channel power is characterized in that the device comprises a power adjustment parameter determining module and a transmitting power adjusting module,
the power adjustment parameter determining module is used for determining a user power adjustment parameter according to the user channel quality;
and the transmission power adjusting module is used for adjusting the transmission power of the HSPA downlink physical channel according to the user power adjusting parameter determined by the power adjusting parameter determining module.
13. The apparatus according to claim 12, wherein the power adjustment parameter determining module comprises a reporting channel quality determining sub-module configured to demodulate the HS-DPCCH channel to obtain a channel quality indicator CQI of a user, and calculate a channel quality CQI of the user according to the CQI and a capability level Cat of the user cur And according to the CQI cur Calculating an average CQI avg According to the average value CQI avg And calculating a power adjustment parameter USER.
14. The apparatus according to claim 12 or 13, wherein the power adjustment parameter determining module further comprises a number determining sub-module, configured to determine the number Num of the acknowledgement messages sent to the user ack And the number Num of the next uplink frames which are still retransmission frames and are received after the confirmation information is sent retrans And calculating a power adjustment parameter USER.
15. The apparatus according to claim 12, wherein the transmission power adjustment module comprises a maximum value calculation sub-module, configured to adjust the HSPA downlink physical channel transmission power as a product of a function of the power adjustment parameter USER and the HSPA downlink physical channel maximum transmission power.
16. The apparatus according to claim 12, wherein the transmission power adjustment module comprises a minimum calculation submodule configured to adjust the HSPA downlink physical channel transmission power to the sum of the HSPA downlink physical channel minimum transmission power and the product of the function of the power adjustment parameter USER and the power adjustment basic step size.
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| CN102264082A (en) * | 2010-05-26 | 2011-11-30 | 鼎桥通信技术有限公司 | Interference coordination method |
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| WO2014023225A1 (en) * | 2012-08-10 | 2014-02-13 | 中兴通讯股份有限公司 | Scheduling policy adjustment method and apparatus, and base station |
| CN106776184A (en) * | 2016-12-26 | 2017-05-31 | 郑州云海信息技术有限公司 | A kind of high-speed link quality verification method and device |
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| CN113630230B (en) * | 2019-01-11 | 2023-03-10 | 华为技术有限公司 | Communication method and device |
| US11937191B2 (en) | 2019-01-11 | 2024-03-19 | Huawei Technologies Co., Ltd. | Communications method and apparatus |
| CN111726181A (en) * | 2019-03-18 | 2020-09-29 | 中兴通讯股份有限公司 | Method and device for acquiring channel state information |
| CN111726181B (en) * | 2019-03-18 | 2022-10-21 | 中兴通讯股份有限公司 | Method and device for acquiring channel state information |
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