CN101119142A - Uplink power scheduling method for controlling RoT and code channel resource allocation method - Google Patents
Uplink power scheduling method for controlling RoT and code channel resource allocation method Download PDFInfo
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Abstract
The present invention relates to a scheduling method for controlling uplink power of RoT, comprising: (1) the base station allots the interference relative thermal noise power RoT of terminate which is in need to be dispatched; (2) the receiving power of terminate is calculated according to the RoT of terminate allotted in the procedure(1). During the distribution of the power, the method fully considers the effect of the own region, the adjacent region interference and other interference abatement technique, realizing the combination control of the RoT of the own region and the adjacent region. The invention also discloses a mute source distributing method, that is, the up-link mute source is distributed according to the allocation proportion of the receiving power of every user, realizing the best match of the power source and mute source.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method for controlling a total network RoT (total interference Over thermal noise power), and in particular, to a method for controlling uplink power scheduling of a total network RoT in an HSUPA (high speed uplink packet access) system and a corresponding code channel resource allocation method.
Background
In order to improve the Uplink access capability, FDD (frequency division duplex) and TDD (time division duplex) have introduced Uplink enhancement (Enhanced Uplink) technology at 3gpp Release6 and Release7 in succession. Similar to HSDPA (High Speed Downlink Packet Access), the most important key technology in the uplink enhanced technology (i.e., HSUPA system) includes: nodeB (base station) fast scheduling, AMC (adaptive modulation and coding), HARQ (hybrid automatic repeat request), etc.
The purpose of the scheduling of the NodeB in the HSUPA system is similar to that of HSDPA, i.e. users are reasonably allocated to share common resources according to a certain principle. In an HSUPA system, in order to ensure the edge coverage rate and stability of the system, the NodeB needs to consider that the total uplink interference is lower than a threshold in the scheduling process. Since the thermal noise power is not changed, the total interference power at the antenna joints is generally considered to be lower than a threshold relative to the thermal noise power value RoT when scheduling. That is, it is the key of uplink enhanced scheduling to reasonably distribute uplink power of each user and ensure RoT of the whole system within a preset range.
In the proposal of 3GPP, the university company provides a scheduling method considering RoT, and the method includes:
firstly, according to the power of the terminal and the data volume demand to be transmitted, obtaining a first maximum rate of the terminal:
In formula (1), the maximum transmission rate obtained according to the desired power of the terminal and the transmission rate required according to the remaining data amount to be transmitted of the terminal are selected as the maximum transmission rate of the terminal with a smaller rate value.
Then, a second maximum rate is obtained for the maximum allowable load of the system.
Defining a calculation formula of load brought by activated UE in a cell as follows:
Wherein:
Sinr j (R i ) For terminal at rate R i The lower estimated signal-to-noise ratio Sinr, which can be estimated from the signal-to-noise ratio and the relative power value of the beacon channel. The following formula:
(E cp /N t ) j Signal-to-noise ratio Sinr, beta obtained for PCCPCH channel measurement eu And beta c Is the beta factor of the E-DCH and DPCCH channels.
The RoT of the system needs to be less than or equal to a threshold, and the maximum allowable load maxLoad can be calculated by using the RoT. Scheduling beta of users by controlling eu /β c Value, make Load j Less than or equal to the maximum allowable load maxLoad, thereby enabling the ROT of the system to be controlled within a preset range. For a corresponding maximum allowable load maxLoad, corresponding to β eu /β c And obtaining a second maximum rate.
(3) Selecting the scheduling rate of the user with a small rate value from the first maximum rate and the second maximum rate:
R auto The difference is quantified for rate.
That is, the above method is a scheduling method in which the base station controls maxLoad (corresponding RoT) to obtain a scheduling rate, and the terminal allocates power according to the scheduling rate. In this method, there may be a case where the terminals transmit data using different powers but at the same rate, so that it is not guaranteed that the RoT of the system is within the controlled range by controlling the allocated power by scheduling the rate.
In addition, the above method does not fully consider the interference of the invoked user to the neighboring cell, and also does not fully consider the interference of the neighboring cell to itself, so it is difficult to ensure that the RoT of the whole network is controlled. Moreover, in order to ensure that the RoT does not exceed the threshold, a certain margin needs to be usually set on the basis of the requirement threshold, which leads to a reduction in system throughput. Also, the above method is suitable for FDD system, but it is difficult to measure and estimate the signal-to-noise ratio by equation 3 for TDD system with only DPDCH channel.
In addition, in RoT control, gains due to interference cancellation techniques such as smart antennas and joint detection are not considered. With these interference cancellation techniques, a significant portion of the total wideband received power does not cause interference to the user, and therefore a larger RoT threshold may be allowed. The method does not consider the gain brought by the interference elimination technology, and the reduction of the system throughput is brought.
It should be noted that the above method does not relate to a method for allocating uplink code channel resources.
Disclosure of Invention
An object of the present invention is to provide an uplink power scheduling method for controlling RoT, so as to solve the technical problem that scheduling has a certain deviation due to the fact that the scheduling rate is controlled by RoT so as to control power.
Another object of the present invention is to provide a code channel resource allocation method suitable for HSUPA.
In order to achieve the above object, the present invention provides an uplink power scheduling method for controlling RoT, including:
(1) A base station distributes interference relative thermal noise power RoT of a terminal to be scheduled to the terminal;
(2) And (2) calculating the receiving power of the terminal according to the RoT distributed to the terminal in the step (1).
And (1) finding the minimum RoT value from the first RoT, the second RoT and the third RoT or from the first RoT and the third RoT or from the second RoT and the third RoT as the RoT allocated to the terminal, wherein the first RoT is obtained according to the maximum power of the terminal, the second RoT is predicted according to the maximum peak rate of the terminal and the maximum rate required by the current cache information, and the third RoT is the residual RoT of the cell.
Step (2) calculating the receiving power of the terminal by:
a1: by passing
Calculating a path loss evaluation value LMeric, wherein l mtra For passing through pilot frequency
Measuring a channel or a broadcast channel PCCPCH to obtain the loss of the cell; l inter The adjacent cell path loss is measured through an adjacent cell pilot channel or a broadcast channel;
a2: by passing
Calculated received power P of terminal k，i Wherein N is 0 To the power of thermal noise, roT i And (4) allocating the RoT of the terminal for the step (1).
Step (2) is to calculate the receiving power of the terminal by the following steps:
b1: by passing
Calculating a path loss evaluation value LMeric, wherein l intra For passing through pilot frequency
Measuring a channel or a broadcast channel PCCPCH to obtain the loss of the cell; l i The adjacent cell path loss is measured through an adjacent cell pilot channel or a broadcast channel;
b2: obtaining an interference suppression multiple beta which shows the improvement capability of an interference elimination technology on a signal-to-noise ratio;
b3: by passing
Calculating the receiving power P of the terminal k，i Wherein N is 0 For thermal noise power, roT i And (4) allocating the RoT of the terminal for the step (1).
Calculating a second RoT by:
c1: by passingCalculating an estimated path loss value Lmetric, where l intra For passing through pilot frequency
Measuring a channel or a broadcast channel PCCPCH to obtain the loss of the cell; l intr By means of a neighbor pilot channel orThe path loss of the adjacent region obtained by the broadcast channel measurement;
c2: by passingCalculating a second RoT, where σ R Is the most excellent
And a target signal-to-noise ratio required by a large rate, wherein RoT _ THD is the maximum upper limit value of the RoT of the system, and Lmetric is a path loss evaluation value.
Calculating a second RoT by:
d1: by passing
Calculating an estimated path loss value LMeric, wherein l intra For passing through pilot frequency
Measuring a channel or a broadcast channel PCCPCH to obtain the loss of the cell; l i The adjacent area path loss is measured through an adjacent area pilot channel or a broadcast channel;
d2: obtaining an interference suppression multiple beta which shows the improvement capability of an interference elimination technology on a signal-to-noise ratio;
d3：
a second RoT is calculated,
wherein σ R And for a target signal-to-noise ratio required by the maximum rate, roT _ THD is the maximum upper limit value of the RoT of the system, beta is an interference suppression multiple, and LMeric is a path loss evaluation value.
The interference suppression multiple beta is the average interference suppression multiple of the cell, or
By passing
Calculating an interference suppression factor beta, or
By passing
And calculating an interference suppression multiple beta, wherein,
RSCP is terminal signal receiving code power, CIR is signal-to-noise ratio before interference elimination at antenna joint, SNR is signal-to-noise ratio after interference elimination, N is 0 To make a thermal noiseThe acoustic power.
The SNR is the signal-to-noise ratio of the measured symbol signal-to-noise ratio minus the spreading gain or the SNR is directly the measured symbol signal-to-noise ratio.
A code channel resource allocation method comprises the following steps:
(1) A base station distributes interference relative thermal noise power RoT of a terminal to be scheduled to the terminal;
(2) Calculating the receiving power of the terminal according to the RoT of the terminal distributed in the step (1);
(3) And allocating the uplink code channel resources of the terminal according to the received power equal ratio.
Step (3) is represented by the formula
And calculating uplink code channel resources of the terminal, wherein the Slot _ RU is the total resource number of one time Slot, and [ ] is the upper rounding or the lower rounding.
And (1) finding the minimum RoT value from the first RoT, the second RoT and the third RoT or from the first RoT and the third RoT or from the second RoT and the third RoT as the RoT allocated to the terminal, wherein the first RoT is obtained according to the maximum power of the terminal, the second RoT is predicted according to the maximum peak rate of the terminal and the maximum rate required by the current cache information, and the third RoT is the residual RoT of the cell.
Step (2) calculating the receiving power of the terminal by:
b1: by passing
Calculating a path loss evaluation value LMeric, wherein l intra The loss of the cell is obtained through the measurement of a pilot channel or a broadcast channel PCCPCH; l i The adjacent area path loss is measured through an adjacent area pilot channel or a broadcast channel;
b2: obtaining an interference suppression multiple beta which shows the improvement capability of an interference elimination technology on a signal-to-noise ratio;
b3: by passing
Calculating the receiving power P of the terminal k，i Wherein, N is 0 For thermal noise power, roT i And (4) allocating the RoT of the terminal for the step (1).
Calculating a second RoT by:
d1: by passing
Calculating an estimated path loss value LMeric, wherein l intra For passing through pilot frequency
Measuring a channel or a broadcast channel PCCPCH to obtain the loss of the cell; l i The adjacent area path loss is measured through an adjacent area pilot channel or a broadcast channel;
d2: obtaining an interference suppression multiple beta which shows the improvement capability of the interference elimination technology to the signal-to-noise ratio;
d3：
a second RoT is calculated,
wherein σ R And for a target signal-to-noise ratio required by the maximum rate, roT _ THD is the maximum upper limit value of the RoT of the system, beta is an interference suppression multiple, and LMeric is a path loss evaluation value.
The interference suppression multiple beta is the average interference suppression multiple of the cell, or
By passing
Calculating an interference suppression factor beta, or
By passing
Calculating an interference rejection multiple beta, wherein,
RSCP is terminal signal receiving code power, CIR is signal-to-noise ratio before interference elimination at antenna joint, SNR is signal-to-noise ratio after interference elimination, N is 0 Is the thermal noise power.
A base station for performing uplink power scheduling, comprising:
terminal RoT allocation unit: the method comprises the steps of allocating the interference-to-thermal noise power RoT of a terminal to be scheduled to the terminal;
a reception power calculation unit: and the terminal is used for calculating the receiving power of the terminal according to the RoT of the distributed terminal.
Compared with the prior art, the method can consider the interference of the adjacent area to the terminal in the process of obtaining the received power of the terminal, and effectively control the edge users of the cell to obtain lower power and the center users of the cell to obtain higher power by combining the path loss ratio of the local area and the adjacent area during scheduling, thereby effectively controlling the interference to the adjacent area and further achieving the purpose of controlling the RoT of the whole network. In addition, the invention combines the interference suppression factor in the scheduling process, can fully play the role of interference suppression, thereby improving the system throughput rate.
In addition, the invention allocates the code channel resources in equal proportion according to the received signal power resources allocated by the terminal, so as to utilize the code channel resources to the greatest extent and improve the utilization rate of the resources.
Drawings
Fig. 1 is a flowchart of an uplink power scheduling method for controlling RoT according to the present invention;
fig. 2 is a flowchart of a code channel resource allocation method according to the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
Please refer to fig. 1, which is a flowchart illustrating an uplink power scheduling method for controlling RoT according to the present invention. It comprises the following steps:
s110: a base station distributes interference relative thermal noise power RoT of a terminal to be scheduled to the terminal;
s120: the reception power of the terminal is calculated according to the RoT allocated to the terminal at step S110. Each step is described in detail below.
1. Step S110
Step S110 is to find the minimum RoT value from the first RoT, the second RoT and the third RoT, or from the first RoT and the third RoT, or from the second RoT and the third RoT, as the RoT allocated to the terminal, where the first RoT is obtained according to the maximum power of the terminal, the second RoT is predicted according to the maximum peak rate of the terminal and the maximum rate required by the current cache information, and the third RoT is the remaining RoT of the cell.
For example, the first RoT can be calculated according to the following formula (5)
(1) Calculating the first RoT using equation 5-1 regardless of the interference cancellation technique
(2) Calculating the first RoT using equation 5-2 in consideration of the interference cancellation technique
Where No is the thermal noise power, P max For the maximum power of the terminal, LMeric is the estimated value of the path loss, wherein l intra The cell loss is obtained through the measurement of a pilot channel or a broadcast channel PCCPCH; l inter For the adjacent area path loss obtained through adjacent area pilot channel or broadcast channel measurement, β is an interference suppression multiple, and LMetric and β formulas are introduced in the following description. The second RoT is predicted according to the maximum peak rate of the terminal and the maximum rate required by the current buffer information, and this calculation method is many, for example, the second RoT can be calculated by using equation 6.
(1) The second RoT is calculated using equation 6-1 regardless of the interference cancellation technique
(2) The second RoT is calculated using equation 6-2 in consideration of the interference cancellation technique
Wherein σ R And for a target signal-to-noise ratio required by the maximum rate, roT _ THD is the maximum upper limit value of the RoT of the system, beta is an interference suppression multiple, and LMetric is a path loss evaluation value.
The third RoT is calculated by equation 7, i.e.
RoT t = RoT _ THD-RoT _ Used (formula 7)
Where RoT _ THD is the maximum upper limit value of the RoT of the system (i.e., the RoT threshold disclosed above), and RoT _ Used is the RoT resource Used by the cell, and each time a terminal is assigned a RoT, its value is added to RoT _ Used.
In the preferred embodiment of the present invention, the lowest RoT value is found from among the first RoT, the second RoT, and the third RoT as the RoT allocated to the terminal.
2. Step S120
The invention provides a method for calculating the receiving power of a terminal under two conditions, wherein the first condition is that the influence of an interference elimination technology on the power is not considered. Another case is to consider the impact of interference cancellation techniques on power.
In the first case, the received power of the terminal is calculated by:
a1: by passing
(equation 8) calculate an estimated path loss value LMeric, where l intra
The loss of the cell is obtained through the measurement of a pilot channel or a broadcast channel PCCPCH; l inter The path loss of the adjacent region is measured through a pilot channel or a broadcast channel of the adjacent region.
The terminal obtains l according to the detection intra And l i Directly calculating a path loss evaluation value LMeric and reporting the calculated value to a base station, or reporting the calculated value to the base station by a terminalDetecting to obtain l intra And l i And directly reporting to the base station, and calculating the path loss evaluation value LMeric by the base station.
a2: by passing
(equation 9) calculated reception power P of terminal k，i Wherein n is 0 For thermal noise power, roT i To assign the RoT of the terminal.
In the second case, the received power of the terminal is calculated by:
b1: the path loss evaluation value LMetric is calculated by equation 8.
b2: and obtaining an interference suppression multiple beta indicating the interference conditions of the local region and the adjacent region.
b3: by passing
(equation 10) calculating the reception power P of the terminal k，i Wherein N is 0 For thermal noise power, roT i To assign the RoT of the terminal.
The interference suppression multiple beta may be a cell average interference suppression multiple, or
By passing
(equation 11) calculating the interference suppression factor β, or
By passing
(formula 12) calculating an interference suppression multiple β, where RSCP is the terminal signal received code power, CIR is the signal-to-noise ratio before the interference cancellation technique at the antenna joint, SNR is the signal-to-noise ratio after the interference cancellation, and N 0 Is the thermal noise power.
In equation 11, when the RSCP value far exceeds N 0 While the thermal noise N can be ignored 0 The function of (1) is to obtain the formula 12. In equations 11 and 12, the SNR can be directly the measured symbol signal-to-noise ratio. In additionIn addition, the SNR is the measured symbol SNR minus the despread-spectrum-plus-minus, considering that the interference cancellation technique and the despreading are performed simultaneouslyThe signal-to-noise ratio of the gain.
In general, the interference suppression factor β in step b3 is the average cell interference suppression factor. That is, the interference suppression multiples β of the terminal calculated by the formulas 11 and 12 are averaged.
The derivation processes of equations 9 and 10 are explained below.
Assigning a desired received power P to a user in a cell k k，i Then the user's contribution to the noise rise RoT of the local area k，i Comprises the following steps:
Assuming measured local average interference rejection ratio
Then, the predicted value of the noise rise shared value after the user suppresses the interference of the local area can be obtained
Comprises the following steps:
The j path loss signal value of the adjacent area reported by the terminal is l j If the RoT sharing value for the neighboring j is:
(formula 15)
According to the path loss evaluation value reported by the terminal, the LMeric is obtained i And the contribution of the user to the total noise rise of the adjacent cell, namely Inter _ RoT, can be obtained k，i Comprises the following steps:
Suppose that the base station reports the interference suppression ratio and communicates through RNCGiven each cell the interference rejection ratio of the neighbouring cell is
Then, the RoT contribution after interference suppression for the j cell is:
In general, if the interference suppression ratio of each neighboring cell is considered to be the same as that of the own cell, the total RoT sharing value of the neighboring cells is set to
For a system which does not adopt the interference cancellation technology, the following principle is adopted:
Suppose that the resource scheduled and allocated by a certain user is RoT i Then, the received power can be obtained as:
According to the reported path loss value and the target value of the closed-loop power control, the transmission power value or the relative variation of the transmission power value can be calculated, so that the terminal is informed through the scheduling information.
For a system adopting the interference cancellation technology, the following principle is adopted:
Suppose that the resource scheduled and allocated by a certain user is RoT i Then its received power is:
From the above formula 9, when the user is located at the edge of the cell, the LMetric is small, so that the scheduling power is low under the same RoT threshold, and the interference of the user to the neighboring cell is effectively controlled. With respect to equation 10, it can be seen that the stronger the interference suppression capability, the higher the scheduled power when considering the interference cancellation technique.
By the power control method, the interference of the adjacent cell to the terminal can be considered in the process of obtaining the received power of the terminal, and the invention effectively controls the cell edge users to obtain lower power and the cell center users to obtain higher power by combining the path loss ratio of the local cell and the adjacent cell during scheduling, thereby effectively controlling the interference to the adjacent cell and further achieving the purpose of controlling the RoT of the whole network. . In addition, the invention combines the interference suppression factor in the scheduling process, can fully play the role of interference suppression, thereby improving the system throughput rate.
Based on the scheduling method disclosed above, the invention also discloses a code channel resource allocation method. Please refer to fig. 2, which is a flowchart illustrating a method for allocating code channel resources according to the present invention. It includes:
s210: the base station allocates the interference relative thermal noise power RoT of the terminal to the terminal needing scheduling:
s220, calculating the receiving power of the terminal according to the RoT of the terminal distributed in the step S210;
s230: and allocating the uplink code channel resources of the terminal according to the received power equal ratio.
Steps S210 and S220 are the same as steps S110 and S120 in fig. 1, and are omitted here.
In step S130 by formula(formula 21)
And calculating uplink code channel resources of the terminal, wherein Slot _ RU is the total resource number of a time Slot, and [ ] is the upper integer or the lower integer.
Since more code channel resources are used and the same size of transmission block allows a larger coding rate and obtains coding gain, all code channel resources should be used as much as possible to make the total number of resources equal to the sum of time slot resources. Meanwhile, in the process of allocating code channel resources, as in the prior art, the OVSF code (orthogonal variable spreading factor) restriction rule needs to be considered (for example, each level of the OVSF code tree defines a spreading factor as SF) k When a code is already used in a time slot, the code on the parent and the code on the lower tree path cannot be used in the same time slot. ). By the method, the RoT of the whole network is effectively controlled, and the uplink code channel resources are effectively utilized and reasonably distributed.
Finally, taking LCR TDD as an example, an implementation process of code channel resource allocation is given.
S1: the terminal measures the receiving power of the PCCPCH channel to obtain the loss l of the local area and the adjacent area intra And l inter ；
S2: the terminal calculates a path loss evaluation value LMeric according to a formula 8, follows the scheduling request information I and sends the scheduling request information I to the base station; the terminal can also directly report the path loss value of each cell, and the base station calculates the evaluation value;
s3: the base station calculates the interference suppression ratio beta of each user according to formula 11 or simplified formula 12, and the average interference suppression ratio
S4: the base station queues the priority of the users to be scheduled;
s5: and the base station selects the terminal to perform RoT distribution according to the priority sequence:
let RoT p ＝RoT(P max ) A first RoT obtained according to the maximum power of the terminal;
RoT r ＝RoT(R max ) A second RoT predicted according to the maximum peak rate of the terminal and the maximum rate required by the current cache information;
RoT t = RoT _ THD-RoT _ Used as the remaining RoT resources of the cell, which is taken as a third RoT;
the RoT allocated by the user is the smallest RoT value of the three:
RoT i ＝min(RoT p ，RoT r ，RoT t )
s6: calculating the receiving power distributed by each user according to a formula 9 or a formula 10;
s7: code channel resources are allocated according to equation 21 while considering OVSF code utilization criteria.
By the code channel allocation, the code channel resources can be utilized to the maximum extent, and the utilization rate of the resources is improved.
A base station for performing uplink power scheduling, comprising: terminal RoT allocation unit: the method comprises the steps of allocating interference relative thermal noise power RoT of a terminal to be scheduled to the terminal; reception power calculation unit: and the terminal is used for calculating the receiving power of the terminal according to the RoT of the allocated terminal.
The terminal RoT allocation unit finds a minimum RoT value from among a first RoT, a second RoT and a third RoT, or from among the first RoT and the third RoT, or from among the second RoT and the third RoT, as the RoT allocated to the terminal according to a preset setting, the first RoT is obtained according to the maximum power utilization of the terminal (e.g., using formula 5), the second RoT is predicted according to the maximum peak rate of the terminal and the maximum rate required by the current buffer information (e.g., using formula 6), and the third RoT is the remaining RoT of the cell (e.g., using formula 7). The received power calculating unit is configured to calculate the received power of the terminal according to equation 9 or equation 10.
The base station of the invention can fully consider the functions of the local area, the adjacent area interference and various interference elimination technologies when distributing power, thereby achieving the purpose of jointly controlling the RoT of the local area and the adjacent area.
The above disclosure is only for the 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 (15)
1. An uplink power scheduling method for controlling RoT, comprising:
(1) A base station distributes interference relative thermal noise power RoT of a terminal to be scheduled to the terminal;
(2) And (2) calculating the receiving power of the terminal according to the RoT distributed to the terminal in the step (1).
2. The method of claim 1, wherein the step (1) finds a minimum RoT value from among a first RoT, a second RoT and a third RoT, or from among the first RoT and the third RoT, or from among the second RoT and the third RoT, as the RoT allocated to the terminal, the first RoT being obtained according to a maximum power of the terminal, the second RoT being predicted according to a maximum peak rate of the terminal and a maximum rate required for current buffering information, and the third RoT being a remaining RoT of the cell.
3. The method of claim 1 or 2, wherein the step (2) calculates the reception power of the terminal by:
a1: by passing
A path loss evaluation value LMetric is calculated,wherein l int ra The loss of the cell is obtained through the measurement of a pilot channel or a broadcast channel PCCPCH; l int er The adjacent area path loss is measured through an adjacent area pilot channel or a broadcast channel;
a2: by passing
Calculated received power P of terminal k，i Wherein N is 0 For thermal noise power, roT i And (4) allocating the RoT of the terminal for the step (1).
4. The method of claim 1 or 2, wherein the step (2) is calculating the reception power of the terminal by:
b1: by passingCalculating an estimated path loss value LMeric, wherein l int ra The loss of the cell is obtained through the measurement of a pilot channel or a broadcast channel PCCPCH; l i The adjacent area path loss is measured through an adjacent area pilot channel or a broadcast channel;
b2: obtaining an interference suppression multiple beta which shows the improvement capability of an interference elimination technology on a signal-to-noise ratio;
b3: by passing
Calculating the receiving power P of the terminal k，i Wherein N is 0 For thermal noise power, roT i And (4) allocating the RoT of the terminal for the step (1).
5. The method of claim 2, wherein the second RoT is calculated by:
c1: by passing
Calculating an estimated path loss value Lmetric, where l int ra The loss of the cell is obtained through the measurement of a pilot channel or a broadcast channel PCCPCH; l int er To pass through the adjacent areaAdjacent area path loss obtained by measuring a pilot channel or a broadcast channel;
c2: by passing
Calculating a second RoT, where σ R And the target signal-to-noise ratio required by the maximum rate, roT _ THD is the maximum upper limit value of the RoT of the system, and Lmric is a path loss evaluation value.
6. The method of claim 2, wherein the second RoT is calculated by:
d1: by passingCalculating a path loss evaluation value LMeric, wherein l int ra The loss of the cell is obtained through the measurement of a pilot channel or a broadcast channel PCCPCH; l i The adjacent area path loss is measured through an adjacent area pilot channel or a broadcast channel;
d2: obtaining an interference suppression multiple beta which shows the improvement capability of an interference elimination technology on a signal-to-noise ratio;
d3：
a second RoT is calculated,
wherein σ R And for a target signal-to-noise ratio required by the maximum rate, roT _ THD is the maximum upper limit value of the RoT of the system, beta is an interference suppression multiple, and LMetric is a path loss evaluation value.
7. The method of claim 4 or 6,
the interference suppression multiple beta is the average interference suppression multiple of the cell, or
By passing
Calculating an interference suppression factor beta, or
By passingCalculate outAn interference suppression multiple beta, wherein,
RSCP is terminal signal receiving code power, CIR is signal-to-noise ratio before interference elimination at antenna joint, SNR is signal-to-noise ratio after interference elimination, N is 0 Is the thermal noise power.
8. The method of claim 7, wherein the SNR is the measured symbol signal-to-noise ratio minus the despreading gain or the SNR is directly the measured symbol signal-to-noise ratio.
9. A method for allocating code channel resources, comprising:
(1) A base station distributes interference relative thermal noise power RoT of a terminal to be scheduled to the terminal;
(2) Calculating the receiving power of the terminal according to the RoT of the terminal distributed in the step (1);
(3) And allocating the uplink code channel resources of the terminal according to the received power equal ratio.
10. The method of claim 9, wherein step (3) is performed by the formula
And calculating uplink code channel resources of the terminal, wherein the Slot _ RU is the total resource number of one time Slot, and [ ] is the upper rounding or the lower rounding.
11. The method of claim 9 or 10, wherein the step (1) finds the smallest RoT value from among a first RoT, a second RoT and a third RoT, or from among the first RoT and the third RoT, or from among the second RoT and the third RoT, as the RoT allocated to the terminal, the first RoT being obtained according to the maximum power of the terminal, the second RoT being predicted according to the maximum peak rate of the terminal and the maximum rate required for current buffering information, and the third RoT being the remaining RoT of the cell.
12. The method of claim 9 or 10, wherein the step (2) calculates the reception power of the terminal by:
b1: by passing
Calculating an estimated path loss value LMeric, wherein l int ra The loss of the cell is obtained through the measurement of a pilot channel or a broadcast channel PCCPCH; l i The adjacent area path loss is measured through an adjacent area pilot channel or a broadcast channel;
b2: obtaining an interference suppression multiple beta which shows the improvement capability of an interference elimination technology on a signal-to-noise ratio;
b3: by passingCalculating the receiving power P of the terminal k，i Wherein, N is 0 For thermal noise power, roT i And (4) allocating the RoT of the terminal for the step (1).
13. The method of claim 11, wherein the second RoT is calculated by:
d1: by passing
Calculating a path loss evaluation value LMeric, wherein l int ra The loss of the cell is obtained through the measurement of a pilot channel or a broadcast channel PCCPCH; l i The adjacent area path loss is measured through an adjacent area pilot channel or a broadcast channel;
d2: obtaining an interference suppression multiple beta which shows the improvement capability of an interference elimination technology on a signal-to-noise ratio;
d3：
a second RoT is calculated,
wherein σ R The RoT _ THD is a maximum upper limit value of the RoT of the system, β is an interference suppression multiple, and LMetric is a path loss evaluation value.
14. The method of claim 12 or 13,
the interference suppression multiple beta is the average interference suppression multiple of the cell, or
By passing
Calculating an interference suppression factor beta, or
By passing
Calculating an interference rejection multiple beta, wherein,
RSCP is terminal signal receiving code power, CIR is signal-to-noise ratio before interference elimination at antenna joint, SNR is signal-to-noise ratio after interference elimination, N is 0 Is the thermal noise power.
15. A base station for performing uplink power scheduling, comprising:
terminal RoT allocation unit: the method comprises the steps of allocating interference relative thermal noise power RoT of a terminal to be scheduled to the terminal;
a reception power calculation unit: and the terminal is used for calculating the receiving power of the terminal according to the RoT of the distributed terminal.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101932099A (en) * | 2009-06-18 | 2010-12-29 | 大唐移动通信设备有限公司 | Method and device for allocating rise over thermal (ROT) in the process of supporting space division multiple access (SDMA) |
| CN102291832A (en) * | 2011-09-02 | 2011-12-21 | 电信科学技术研究院 | Co-time-slot scheduling method and device of E-PUCH and other channels |
| CN103379658A (en) * | 2012-04-16 | 2013-10-30 | 中兴通讯股份有限公司 | Method and device for code channel scheduling |
| CN104581759A (en) * | 2013-10-25 | 2015-04-29 | 瑞典爱立信有限公司 | Method and device for measuring received signal code power (RSCP) of wireless access network system |
| WO2017181197A1 (en) | 2016-04-15 | 2017-10-19 | Saprex, Llc | Composite insulation system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101932099A (en) * | 2009-06-18 | 2010-12-29 | 大唐移动通信设备有限公司 | Method and device for allocating rise over thermal (ROT) in the process of supporting space division multiple access (SDMA) |
| CN101932099B (en) * | 2009-06-18 | 2013-10-02 | 电信科学技术研究院 | Method and device for allocating rise over thermal (ROT) in the process of supporting space division multiple access (SDMA) |
| CN102291832A (en) * | 2011-09-02 | 2011-12-21 | 电信科学技术研究院 | Co-time-slot scheduling method and device of E-PUCH and other channels |
| CN102291832B (en) * | 2011-09-02 | 2014-06-04 | 电信科学技术研究院 | Co-time-slot scheduling method and device of E-PUCH and other channels |
| CN103379658A (en) * | 2012-04-16 | 2013-10-30 | 中兴通讯股份有限公司 | Method and device for code channel scheduling |
| CN103379658B (en) * | 2012-04-16 | 2016-08-24 | 中兴通讯股份有限公司 | Scheduling code channel method and device |
| CN104581759A (en) * | 2013-10-25 | 2015-04-29 | 瑞典爱立信有限公司 | Method and device for measuring received signal code power (RSCP) of wireless access network system |
| CN104581759B (en) * | 2013-10-25 | 2020-02-21 | 瑞典爱立信有限公司 | Method and device for measuring Received Signal Code Power (RSCP) of wireless access network system |
| WO2017181197A1 (en) | 2016-04-15 | 2017-10-19 | Saprex, Llc | Composite insulation system |
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