JP2013503520A - Uplink transmission power control method and apparatus - Google Patents

Abstract

The base station transmits γ value information corresponding to the frequency partition of each subframe in the subframe set including one or a plurality of subframes to the terminal, or the base station transmits all or one to the self-management network (SON). An uplink transmission power control method including transmitting γ value information corresponding to a part of frequency partitions, or transmitting information of reference γ values corresponding to all or a part of frequency partitions to a base station. provide. Also provided is an uplink transmission power control apparatus. According to the technical solution, it is possible to dynamically transmit and adjust the γ value, dynamically control uplink transmission power, and dynamically control uplink interference between cells.
[Selection] Figure 1

Description

  The present invention relates to a communication area, and more particularly, to an uplink transmission power control method and apparatus.

  In a wireless communication system, a base station is a facility that provides a service to a terminal, and communicates with the terminal through an uplink and a downlink. Here, the downlink (ie, forward) refers to the direction from the base station to the terminal, and the uplink (ie, reverse) refers to the direction from the terminal to the base station. A plurality of terminals can simultaneously transmit data to the base station via the uplink, or simultaneously receive data from the base station via the downlink.

In order to further improve the use efficiency of the frequency spectrum of the radio communication system, it is preferable that each cell uses all the frequency resources as much as possible, but in this case, between users who use the same frequency resource between cells. Existing mutual interference can severely affect uplink performance in wireless communication systems. As a result, it is possible to efficiently control the interference between uplink cells by rationally controlling the uplink transmission power. For example, in the prior art, different desired uplink interference noise ratios (abbreviated as Interference over Thermal Noise Ratio, IoT) for different frequency partitions (abbreviated as FP) in the entire frequency band of the system. The value of
(Where γ represents the desired uplink IoT factor of the frequency partition). The above equation can control uplink interference between cells by controlling the transmit power available for the uplink, but in the above scheme, the γ value is for all subframes of the frequency partition, and The system divides the entire frequency resource only once into frequency partitions, and the value of γ for each frequency partition is given only once, which reduces the flexibility of interference control between uplink cells. The uplink performance of the wireless communication system will be affected.

  In order to meet the demands of the mobile communication environment, which is becoming increasingly complicated, the current wireless communication network is designed to optimize the overall network performance, cover performance and transfer volume of the system. It is necessary to have the ability to dynamically analyze the measurement information reported from the uplink, and it is necessary to submit adjustment information of the arrangement parameters of such equipment. The self-management network (Self-Organization Network, abbreviated as SON) guides the BS by analyzing the correlation data obtained by the BS and the MS at the air interface (Air Interface), and assigns the parameters appropriately. To achieve the goal of optimizing the overall network performance, cover performance and transfer volume of the system with less artificial interference. A SON typically includes two parts: self configuration and self optimization. Self-configuration is a process of BS initialization and automatic configuration including cell initialization, neighbor cell discovery, macro BS self-configuration, and the like. Self-optimization analyzes system performance from BS / MS and fine-tunes BS parameters to fine-tune BS performance (eg, quality of service, network efficiency, through-out, cell This is a process for optimizing the cover and cell capacity. In SON, in order to realize self-optimization (Self-Optimizing FFR) of FFR (Frequency Frequency Reuse), signaling required between the SON network and the BS when optimizing the system performance Exchange is required. The SON analyzes the necessary information reported in the uplink from the BS, and sends correlation signaling to guide the allocation of the FFR information of each BS and the dynamic adjustment of the corresponding allocation parameters. Uplink FFR is closely related to the power control algorithm. In the prior art, since there is a lack of a method for adjusting the γ value between the SON and the BS, the interference control between uplink cells is limited, which affects FFR self-optimization.

  While there is insufficient flexibility of base station adjustment to the γ value of the terminal, which exists in the correlation technology, there is a lack of a γ value adjustment plan between the SON and the BS, which affects FFR self-optimization. No effective solution has been submitted for the problem that gives

  The present invention has been made in view of the problem that the γ value adjustment is not flexible or the γ value is not adjusted between the SON and the BS, which is present in the prior art. It is a main object of the present invention to provide an uplink transmission power control method and apparatus that can solve the above problem.

  In order to achieve the above object, the present invention provides an uplink transmission power control method.

  In the uplink transmission power control method according to the present invention, a base station transmits γ value information corresponding to a frequency partition in each subframe of a subframe set including one or a plurality of subframes to a terminal. including.

  The γ values corresponding to different subframes in the subframe set are preferably the same or different.

  It is preferable that the frequency partition division schemes of different subframes in the subframe set are the same or different.

  When the frequency partition division method of each subframe in the subframe set is the same and the γ value corresponding to each frequency partition is the same, it is preferable to transmit only one γ value. In this case, the subframe set may be all the subframes or a part of the subframes.

  When the base station transmits γ value information corresponding to the frequency partition in the subframe set to the terminal, the base station transmits γ value information corresponding to all or some of the frequency partitions in the subframe set to the terminal. The terminal transmits the default γ value or the γ value corresponding to the recently acquired untransmitted frequency partition of the terminal to the untransmitted It is preferable to use as the γ value corresponding to the frequency partition.

  It is preferable that the base station transmits information on the γ value corresponding to the frequency partition in the subframe set to the terminal via multicast signaling, unicast signaling, or broadcast signaling.

  In the above method, after the base station transmits information on the γ value corresponding to the frequency partition in the subframe set to the terminal, and further after the base station receives the information, the corresponding frequency according to the γ value corresponding to the different frequency partition Preferably, the method includes determining transmission power in the partition.

In order to achieve the above object, the present invention provides an uplink transmission power control method.
The uplink transmission power control method according to the present invention includes a base station transmitting γ value information corresponding to all or a part of frequency partitions to an upper layer entity. The upper layer entity may be a self-management network SON.

  The γ value is the convergence value of the γ value that is the converged γ value obtained by adjusting the first scheduled time, the instantaneous value of the γ value within the first scheduled time, and the statistics of the γ value within the first scheduled time. It is preferable to include at least one of the average values.

  Preferably, the first scheduled time includes one of one or more subframes, one or more frames, and one or more superframes.

  The SON preferably includes at least one of a network unit and a functional module in the network unit.

  Preferably, the network unit includes at least one of a base station, a relay facility, a server, a base station controller, an access service network, a connection service network, a core network, and a core network gateway.

  At least one of a trigger when the base station enters the SON, a trigger when the performance of the entire SON satisfies the first condition, and a trigger when the performance of the network unit satisfies the second condition It is preferable to transmit γ value information in accordance with a predetermined trigger mechanism including. The first condition is that the SON service quality threshold is smaller than the scheduled SON service quality threshold, the SON network efficiency threshold is smaller than the SON scheduled network efficiency threshold, the SON through-out threshold is the SON scheduled through-out. The transmission power of the frequency partition is smaller than the threshold, the cell cover threshold of the SON is smaller than the cell cover threshold scheduled for the SON, the cell capacity threshold of the SON is smaller than the cell capacity threshold of the SON, the number of frequency partitions is changed, It includes at least one of the following conditions: changed, frequency partition target IOT level changed, and base station joined the network. The second condition is that the network unit service quality threshold is smaller than the network unit scheduled service quality threshold, the network unit network efficiency threshold is smaller than the network unit scheduled network efficiency threshold, and the network unit through-out threshold is network Number of frequency partitions that are less than the unit's scheduled through-out threshold, the network unit's cell coverage threshold is less than the network unit's scheduled cell coverage threshold, the network unit's cell capacity threshold is less than the network unit's scheduled cell capacity threshold The frequency partition transmit power has changed, the frequency partition target's desired uplink jamming noise ratio level has changed, and the base station has To over click including at least one of the conditions that participated.

In order to achieve the above object, the present invention provides an uplink transmission power control method.
In the uplink transmission power control method according to the present invention, the SON transmits reference γ value information corresponding to all or a part of frequency partitions to the base station.

  In the above method, before the SON transmits the reference γ value information corresponding to all or some frequency partitions to the base station, the base station further sets the γ value corresponding to all or some frequency partitions to the SON. It preferably includes transmitting information.

  The mode in which the SON sends the reference γ value information to the base station is that the SON sends the absolute value of the reference γ value to the base station, and the SON is sent to the base station from the reference γ value and the base station to the SON. Preferably, the method includes one of transmitting a difference value from the γ value.

  In the above method, after the SON transmits the reference γ value information corresponding to all or some frequency partitions to the base station, the base station further corresponds to the γ value corresponding to all or some frequency partitions according to the reference γ value. It is preferable to include adjusting.

  The SON preferably includes at least one of a network unit and a functional module in the network unit.

  Preferably, the network unit includes at least one of a base station, a relay facility, a server, a base station controller, an access service network, a connection service network, a core network, and a core network gateway.

  SON includes at least one of a predetermined period trigger, a trigger when the performance of the entire SON satisfies the first condition, and a trigger when the performance of the network unit satisfies the second condition. It is preferable to calculate the reference γ value according to the determined trigger mechanism. The first condition is that the SON service quality threshold is smaller than the scheduled SON service quality threshold, the SON network efficiency threshold is smaller than the SON scheduled network efficiency threshold, the SON through-out threshold is the SON scheduled through-out. The transmission power of the frequency partition is smaller than the threshold, the cell cover threshold of the SON is smaller than the cell cover threshold scheduled for the SON, the cell capacity threshold of the SON is smaller than the cell capacity threshold of the SON, the number of frequency partitions is changed, It includes at least one of the following conditions: changed, frequency partition target IOT level changed, and base station joined the network. The second condition is that the network unit service quality threshold is smaller than the network unit scheduled service quality threshold, the network unit network efficiency threshold is smaller than the network unit scheduled network efficiency threshold, and the network unit through-out threshold is network Number of frequency partitions that are less than the unit's scheduled through-out threshold, the network unit's cell coverage threshold is less than the network unit's scheduled cell coverage threshold, the network unit's cell capacity threshold is less than the network unit's scheduled cell capacity threshold The frequency partition transmit power has changed, the frequency partition target's desired uplink jamming noise ratio level has changed, and the base station has To over click including at least one of the conditions that participated.

  To achieve the above object, the present invention further includes an uplink transmission power control apparatus including a transmission module that is located in a base station and transmits information on γ values corresponding to all or a part of frequency partitions to an upper layer entity. I will provide a.

  The uplink transmission power control apparatus further includes a receiving module that receives reference γ value information corresponding to all or a part of frequency partitions transmitted by the SON, and all or a part of the frequency partitions according to the reference γ value. It is preferable to include an adjustment module for adjusting the corresponding γ value.

  According to the present invention, the base station dynamically reports the γ value, and the SON dynamically adjusts the γ value reported from the base station and transmits the γ value to the base station. By adopting the method of transmitting the γ value to the terminal, the problem that the adjustment of the γ value is not flexible and lacks a complete γ value adjustment method between the SON and the BS is solved. Coordination and dynamic control of uplink transmission power can be achieved, and uplink interference between cells can be flexibly controlled to optimize network performance.

The drawings are intended to provide a further understanding of the invention and to constitute a part of this specification and to interpret the invention together with embodiments of the invention, but are not intended to limit the invention. In the drawing
3 is a flowchart of an uplink transmission power control method according to the first embodiment of the present invention. It is a schematic diagram of the frequency partition of adjacent sub-frames which employ | adopted the different frequency resource division | segmentation system concerning the example 1 of this invention. It is a flowchart of uplink transmission power control based on (gamma) value in each frequency partition concerning Example 1 of this invention. It is a schematic diagram of the frequency partition of adjacent sub-frames which employ | adopted the same frequency resource division | segmentation system concerning Example 2 of this invention. It is a schematic diagram of the frequency partition of adjacent sub-frame sets which employ | adopted the different frequency resource division | segmentation system concerning the example 3 of this invention. It is a schematic diagram of the frequency partition of adjacent sub-frame sets which employ | adopted the same frequency resource division | segmentation system concerning the example 4 of this invention. 6 is a flowchart of an uplink transmission power control method according to a second embodiment of the present invention. It is a schematic diagram of the SON network structure of Example 5 of this invention. It is a schematic diagram of the frequency resource allocation method of the adjacent sectors which employ | adopted FFR technique in Example 5 of this invention, and the transmission power of each frequency partition.

  In view of the problems existing in the correlation technique, the embodiment of the present invention is that the base station transmits the information of the γ value corresponding to the frequency partition in the subframe set to the terminal, or the base station completely transmits to the self-management network SON. Or, the principle of processing is to transmit γ value information corresponding to some frequency partitions, or to send reference γ value information corresponding to all or some frequency partitions to the base station. A link transmission power control scheme is provided. The scheme divides the entire resource available in the uplink into several subframe sets, provides different frequency partition distributions for each subframe set, and γ value for each frequency partition To control uplink interference levels in different frequency partitions, and to set different gamma values in different subframes to adjust the uplink transmission power of terminals in real time, thereby reducing uplink interference between cells. It is possible to control flexibly and improve the performance of the wireless communication system.

  Hereinafter, the present invention will be described in detail with reference to the drawings. It should be understood that the following examples and details in the examples may be combined in various ways as long as they do not collide with each other.

Method Embodiment First Embodiment An embodiment according to the present invention provides an uplink transmission power control method. FIG. 1 is a flowchart of an uplink transmission power control method according to the first embodiment of the present invention. As shown in FIG. 1, the method includes steps S102 to S104 as follows:
Information on the γ value corresponding to the frequency partition in each subframe of the subframe set in which the base station includes one or a plurality of subframes (that is, a specific subframe or a plurality of subframes) to the terminal. Is transmitted (step S102). The γ values corresponding to different subframes in the subframe set may be the same or different, and the frequency partition division method in different subframes in the subframe set may be the same or different. Good. When the base station can transmit γ value information corresponding to all or some of the frequency partitions in the subframe set to the terminal, and among them, γ value information corresponding to some of the frequency partitions is transmitted The terminal can use the default γ value or the γ value corresponding to the recently transmitted untransmitted frequency partition of the terminal as the γ value corresponding to the untransmitted frequency partition. For example, the base station transmits information on γ values corresponding to each of several (all or a part) frequency partitions in the subframe set via the downlink channel, and this time, a certain frequency If the γ value corresponding to the partition is not transmitted, the terminal adopts the γ value of the standard default arrangement, which may be 1 or other values, or transmitted from the base station to the terminal last time or in the previous several times the base station The recently obtained γ value corresponding to the frequency partition such as the γ value transmitted from the terminal to the terminal can be adopted. The base station can transmit information on the γ value corresponding to the frequency partition in the subframe set to the terminal via multicast signaling, unicast signaling, or broadcast signaling.

  In the prior art, the information of the γ value corresponding to the frequency partition transmitted from the base station to the terminal is for all subframes. In this technical solution, it is possible to improve the flexibility of adjustment of the base station to the γ value of the terminal by transmitting the γ value to one or more specific subframes instead of all the subframes. it can.

  Also, in the conventional technique, when the frequency partition division method of each subframe in the subframe set is the same and the γ value corresponding to each frequency partition is the same, the γ value is transmitted to each frequency partition. However, in the present invention, one γ value can be transmitted, and specifically, one γ value can be broadcast. In the present technical solution, the subframe set may be a specific one or a plurality of subframes, or all the subframes. By transmitting one γ value, it is possible to save system resources and improve the flexibility of base station adjustment to the γ value of the terminal.

  Specifically, the selection of the γ value in an individual frequency partition depends on the desired uplink IoT value in that frequency partition of the neighboring cell. The specific dependency is specifically determined according to the actual situation, and is not limited in the embodiment of the present invention. The larger the desired uplink IoT value in the frequency partition of the neighboring cell, the larger the γ value in the frequency partition, and conversely, the smaller the desired uplink IoT value in the frequency partition of the neighboring cell, The γ value in the frequency partition becomes small. The dependency between the above-described selection of the γ value and a desired uplink IoT value in the frequency partition of the adjacent cell can be specifically determined according to an actual situation, and is not limited in the embodiment of the present invention.

After receiving the γ value information corresponding to the frequency partition, the terminal determines transmission power in the corresponding frequency partition based on the γ value corresponding to each of the different frequency partitions (step S104).
In this embodiment, the base station transmits the γ value to the terminal a plurality of times under a preset trigger condition, so that the system in the conventional technique divides the frequency partition only once for the entire frequency resource. However, the disadvantage that the value of γ of each frequency partition is given only once is overcome, and the flexibility of interference control between uplink cells and the uplink performance of the wireless communication system are improved.

  The implementation process of the embodiment of the present invention will be described in detail as follows while combining examples.

Example 1
FIG. 2 is a schematic diagram of frequency partitions between adjacent subframes adopting different frequency resource division schemes according to Example 1 of the present invention. As shown in FIG. 2, in subframe 1 and subframe 2, frequency resources are divided by different frequency resource division schemes. The uplink available frequency resources of subframe 1 and subframe 2 have several γ values each representing their magnitude of uplink interference due to data transmitted from other desired cell terminals in the band. It is divided into frequency partitions. In subframe 1, frequency partitions A, B have lower uplink γ values and frequency partitions C, D have higher uplink γ values, ie, in case of subframe 1, frequency partitions A, B Smaller uplink disturbances are allowed at, but larger uplink disturbances are allowed at frequency partitions C and D. In subframe 2, frequency partitions A and C have a lower uplink γ value and frequency partition B has a higher uplink γ value, ie, in case of subframe 2, in frequency partitions A and C Smaller uplink disturbances are allowed, but in frequency partition B, larger uplink disturbances are allowed.

FIG. 3 is a flowchart of uplink transmission power control based on the γ value in each frequency partition according to Example 1 of the present invention. FIG. 3 illustrates a flow of control of uplink transmission power of a terminal that occupies subframe 1 in the system, using the two subframe resource partitioning schemes illustrated in FIG. 2 as an example. Specific steps are as follows:
Subframe 1 transmits frequency resource division information divided into four frequency partitions of A, B, C, and D that can be used in uplink via downlink signaling. Table 1 (Table 1-A, The information of the γ value corresponding to each frequency partition is transmitted through the downlink signaling shown in Table 1-B and Table 1-C) (step 101).

Table 1-A indicates that the γ value of the signaling is used over a set of consecutive subframes from the set of subframes that received the signaling.
Table 1-B indicates that the subframe set labeled by the subframe set uses the γ value of the signaling. Here, the subframe sets may be continuous or may be discrete.
Table 1-C indicates that the same Bitmap subframe sets use corresponding γ values, where the same Bitmap subframe sets may be continuous or discrete. .

After receiving the γ value information corresponding to each frequency partition, the terminal determines γ values corresponding to different frequency partitions, and the transmission power of the terminal in the subcarrier included in the corresponding frequency partition according to Equation (1) Is calculated (step 102).
In the formula (1), the variable P _SC represents the transmission power of the terminal in the corresponding sub-carrier, N denotes the thermal noise, IoT is uplink interference noise ratio base station is obtained by measuring a variable N IoT is reported to the terminal by the base station via the downlink channel, γ is a desired uplink IoT factor, L is a parslows compensation value determined by the terminal according to the downlink channel reception quality, and SIR _DL is downlink downlink The signal interference ratio, _Nr is the number of base station receive antennas.

  It is necessary to explain that equation (1) is one of the method embodiments according to the embodiment of the present invention, and all power control algorithms capable of controlling the uplink IoT are described as selectable embodiments of the method. And is not limited in the embodiments of the present invention.

Example 2
FIG. 4 is a schematic diagram of frequency partitions between adjacent subframes adopting the same frequency resource division method according to Example 2 of the present invention. As shown in FIG. 4, in subframe 1 and subframe 2, frequency resources are divided by the same frequency resource division scheme. The uplink available frequency resources of subframe 1 and subframe 2 have several γ values each representing the magnitude of uplink interference due to data transmitted from other desired cell terminals in the band. Divided into frequency partitions. In subframe 1, frequency partitions A, B have lower uplink γ values and frequency partitions C, D have higher uplink γ values, ie, in case of subframe 1, frequency partitions A, B Smaller uplink disturbances are allowed at, but larger uplink disturbances are allowed at frequency partitions C and D. In subframe 2, frequency partitions A, C have a lower uplink γ value and frequency partitions B, D have a higher uplink γ value, ie, for subframe 2, frequency partitions A, C Smaller uplink disturbances are allowed in, while in frequency partitions B and D, larger uplink disturbances are allowed.

FIG. 3 illustrates the flow of control of uplink transmission power of a terminal occupying subframe 1 in the system, taking the two subframe resource partitioning schemes shown in FIG. 4 as an example. The specific steps are as follows:
Subframe 1 transmits frequency resource division information divided into four frequency partitions of A, B, C, and D that can be used in uplink via downlink signaling. Table 1 (Table 1-A, The information of the γ value corresponding to each frequency partition is transmitted through the downlink signaling shown in Table 1-B and Table 1-C) (step 201).

  After receiving the γ value information corresponding to each frequency partition, the terminal determines γ values corresponding to different frequency partitions, and calculates the transmission power of the terminal in the subcarriers included in the corresponding frequency partition according to Equation (1). (Step 202).

Example 3
FIG. 5 is a schematic diagram of frequency partitions of a set of adjacent subframes adopting different frequency resource division schemes according to Example 3 of the present invention. As shown in FIG. 5, in subframe set 1 and subframe set 2, frequency resources are divided by different frequency resource division schemes. The uplink available frequency resources of subframe set 1 and subframe set 2 have their respective γ values representing the magnitude of uplink interference due to data transmitted from other desired cell terminals in the band. Divided into several frequency partitions. In subframe set 1, frequency partitions A, B have lower uplink γ values and frequency partitions C, D have higher uplink γ values, ie, for subframe 1, frequency partition A, Smaller uplink disturbances are allowed in B, while larger uplink disturbances are allowed in frequency partitions C and D. In subframe set 2, frequency partitions A, C have lower uplink γ values and frequency partition B has higher uplink γ values, ie, for subframe set 2, frequency partitions A, C Smaller uplink disturbances are allowed at, but in frequency partition B, larger uplink disturbances are allowed.

FIG. 3 illustrates a flow of control of uplink transmission power of a terminal that occupies subframe set 1 in the system, taking the two subframe set resource partitioning scheme shown in FIG. 5 as an example. The specific steps are as follows:
The subframe set 1 transmits division information of frequency resources divided into four frequency partitions A, B, C, and D that can be used in uplink through downlink signaling. Γ value information corresponding to each frequency partition is transmitted via downlink signaling shown in Tables 1-B and 1-C) (step 301).

  After receiving the γ value information corresponding to each frequency partition, the terminal determines γ values corresponding to different frequency partitions, and calculates the transmission power of the terminal in the subcarriers included in the corresponding frequency partition according to Equation (1). (Step 302).

  In this example, the example in which the frequency resource division schemes of different subframes in the subframe set are the same has been described as an example, but in the actual application, the frequency resource division schemes of different subframes in the subframe set are different. However, since the realization principle is almost the same as the case where the frequency resource division method is the same, it will not be described in detail here.

Example 4
FIG. 6 is a schematic diagram of frequency partitions between sets of adjacent subframes adopting the same frequency resource division scheme according to Example 4 of the present invention. As shown in FIG. 6, in subframe set 1 and subframe set 2, frequency resources are divided by the same frequency resource division scheme. The uplink available frequency resources of subframe set 1 and subframe set 2 have their respective γ values representing the magnitude of uplink interference due to data transmitted from other desired cell terminals in the band. Divided into several frequency partitions. In subframe set 1, frequency partitions A, B have lower uplink γ values and frequency partitions C, D have higher uplink γ values, ie, for subframe 1, frequency partition A, Smaller uplink disturbances are allowed in B, while larger uplink disturbances are allowed in frequency partitions C and D. In subframe set 2, frequency partitions A and C have lower uplink γ values and frequency partitions B and D have higher uplink γ values, ie, in case of subframe set 2, frequency partition A , C allow smaller uplink disturbances, but frequency partitions B and D allow larger uplink disturbances.

FIG. 3 illustrates a flow of control of uplink transmission power of a terminal that occupies subframe set 1 in the system, taking the two subframe set resource partitioning scheme shown in FIG. 6 as an example. The specific steps are as follows:
The subframe set 1 transmits division information of frequency resources divided into four frequency partitions A, B, C, and D that can be used in uplink through downlink signaling. Γ value information corresponding to each frequency partition is transmitted via downlink signaling shown in Tables 1-B and 1-C) (step 401).

  After receiving the γ value information corresponding to each frequency partition, the terminal determines γ values corresponding to different frequency partitions, and calculates the transmission power of the terminal in the subcarriers included in the corresponding frequency partition according to Equation (1). (Step 402).

Second Embodiment An embodiment of the present invention provides an uplink transmission power control method including a base station transmitting γ value information corresponding to all or a part of frequency partitions to an upper layer entity, where The upper layer entity may be the self-management network SON. FIG. 7 is a flowchart of an uplink transmission power control method according to the second embodiment of the present invention. As shown in FIG. 7, the method includes the following steps S702 to S706:
The base station, to the SON, corresponding to all or part of the frequency partition, the convergence value of the γ value, the instantaneous value of the γ value within the first scheduled time, and the statistical average value of the γ value within the first scheduled time Γ value information including at least one of the γ value is transmitted (step S702), where the convergence value of the γ value is the converged γ value obtained after the adjustment of the first scheduled time, and the first scheduled The time may include one of one or more subframes, one or more frames, and one or more superframes. Specifically, the γ value can converge within the first scheduled time.

  In this case, the convergence value of the γ value can be used as the current γ value, but the γ value may not converge until the first scheduled time is completed. In this case, the first scheduled time is completed. The instantaneous value of the γ value at the time can be the current γ value, that is, if the γ value does not converge, the γ value includes the instantaneous value of the γ value when the first scheduled time is completed, or An instantaneous value of the γ value at an arbitrary time within one scheduled time may be selected as the current γ value. What needs to be described is that what method is selected to determine the γ value can be selected at random, and the basis for selection is not limited to the above selection basis.

  The base station may be all or a part of base stations that exchange signaling with the SON, and it is preferable that γ value information can be transmitted to the SON according to a predetermined trigger mechanism. The SON in the method may include at least one of a network unit and a functional module in the network unit. Here, the network unit may include at least one of a base station, a relay facility, a server, a base station controller, an access service network, a connection service network, a core network, and a core network gateway.

  The SON transmits reference γ value information corresponding to all or some of the frequency partitions to the base station (step S704). The SON transmits the absolute value of the reference γ value to the base station, and the SON transmits the difference between the reference γ value to the base station and the γ value transmitted from the base station to the SON. Reference γ value information can be transmitted. In this step, the reference γ value can be calculated by a trigger mechanism in which the SON is predetermined.

  The base station adjusts the γ values corresponding to all or some of the frequency partitions according to the reference γ value (step S706).

  The predetermined trigger mechanism in step S702 and step S704 is a trigger of a predetermined period, a trigger when the performance of the entire SON satisfies the first condition, and a trigger when the performance of the network unit satisfies the second condition. And at least one of them. Here, the first condition is that the SON service quality threshold is smaller than the scheduled SON service quality threshold, the SON network efficiency threshold is smaller than the SON scheduled network efficiency threshold, and the SON through-out threshold is SON scheduled. Of the frequency partition, the SON cell cover threshold is smaller than the planned SON cell cover threshold, the SON cell capacity threshold is smaller than the planned SON cell capacity threshold, the number of frequency partitions is changed, It may include at least one of the conditions that the transmission power has changed, the target IOT level of the frequency partition has changed, and that the base station has joined the network. The second condition is that the network unit service quality threshold is smaller than the network unit scheduled service quality threshold, the network unit network efficiency threshold is smaller than the network unit scheduled network efficiency threshold, and the network unit through-out threshold is network Number of frequency partitions that are less than the unit's scheduled through-out threshold, the network unit's cell coverage threshold is less than the network unit's scheduled cell coverage threshold, the network unit's cell capacity threshold is less than the network unit's scheduled cell capacity threshold The frequency partition transmit power has changed, the frequency partition target desired uplink jamming noise ratio level has changed, and the base station has It may include at least one of the conditions that have subscribed to over click.

  What needs to be explained is that after the base station transmits γ value information corresponding to several (partial or all) frequency partitions to the SON, the SON corresponds to the several frequency partitions. All of the values may be adjusted and transmitted, or some of the γ values corresponding to the above several frequency partitions may be adjusted and transmitted (γ values corresponding to some of the frequency partitions may be adjusted). (Since it is unnecessary or limited in computing capacity of SON). In addition, after the SON transmits information on reference γ values (that is, adjusted γ values) corresponding to some (partial or all) frequency partitions to the base station, the base station The γ values of all corresponding frequency partitions may be adjusted, or only the γ values of some frequency partitions corresponding to the reference γ values may be adjusted.

  The implementation process of the embodiment of the present invention will be described in detail as follows while combining examples.

Example 5
FIG. 8 is a schematic diagram of the SON network configuration of Example 5 of the present invention. As shown in FIG. 8, it is assumed that there are three base stations, BS1, BS2, and BS3, respectively, where the serving base station of MS1 and MS2 is BS1, the serving base station of MS3 and MS4 is BS2, and MS5 The serving base station of MS6 is BS3. The SON may be a single network entity or may exist in the network unit as a functional module, and exchanges necessary signaling with the BS1, BS2, and BS3. The SON includes at least a self-optimizing FFR module (Self-Optimizing FFR module), and may include other functional modules.

FIG. 9 is a schematic diagram of the frequency resource allocation method between adjacent sectors and the transmission power of each frequency partition adopting the FFR technique in Example 5 of the present invention. As shown in FIG. 9, the frequency resources available to BS1, BS2, and BS3 are divided into four frequency partitions W1, W2, W3, and W4. Among them, W1, W2, and W3 belong to the Reuse 3 (that is, frequency multiplexing factor is 3) set, and W4 belongs to the Reuse 1 (ie, frequency multiplexing factor is 1) set. Among them, the transmission power of each frequency partition satisfies the condition P _High ≧ P _reuse1 > P _Low . In this example, the method provided in the embodiment of the present invention will be described in detail by taking BS1 as an example.

Base station to SON, BSID, number of terminals connected to base station, terminal location distribution information, SINR values at terminals W1, W2, W3, W4, work load instruction information at W1, W2, W3, W4 , W1, W2, W3, W4, interference strength indication information, W1, W2, W3, W4 resource metric information (abbreviated as Resource Metrics, MR), W1, W2, W3, W4 γ values γ ₁ , γ Information including at least one of ₂ , γ ₃ , and γ ₄ is reported (step 901).

Among them, γ ₁ , γ ₂ , γ ₃ , and γ ₄ correspond to the respective FPs obtained after adjustment of the instantaneous value of the γ value corresponding to each FP or the fixed time at an arbitrary time within a certain time. It may be an instantaneous value that is an instantaneous value of the γ value to be performed (that is, an instantaneous value of the γ value when the constant time is not completed after adjustment), or a statistical average value or a convergence value. In this embodiment, it is hypothesized that γ ₁ , γ ₂ , γ ₃ , and γ ₄ are convergence values, that is, γ values obtained after adjustment for a certain time using a specific power control algorithm. It is necessary to explain that the specific power control algorithm described above can be selected randomly according to the actual situation, and the specific adjustment time can be selected flexibly, and is not limited to the embodiment of the present invention.

  Among them, the certain time may be one or a plurality of subframes, one or a plurality of frames, or one or a plurality of superframes.

The SON determines reference γ values γ ₁ , γ ₂ , γ ₃ , γ ₄ corresponding to W ₁ , W ₂ , W ₃ , W ₄ of BS 1 according to the information reported from the base station, and γ ₁ , γ ₂ , γ ₃ and γ ₄ are transmitted to BS 1 (step 902). In this step, the method for determining the reference γ value according to the γ value reported by the SON from the base station can be selected flexibly according to the actual situation, and the specific method is also introduced in the prior art. It will not be described in detail here.

BS1 adjusts the γ value of each frequency partition uniformly at the specified FFR parameter adjustment timing, or adjusts it separately at non-specific timing, and sets the new γ value of the frequency partition under the base station. Terminal MS1 and MS2 are notified (step 903). Here, BS 1 can use γ ₁ , γ ₂ , γ ₃ , γ ₄ directly transmitted from the SON as a new γ value of the frequency partition, or γ ₁ transmitted from the SON to the BS _1. , Γ ₂ , γ ₃ , γ ₄ , new γ values γ ₁₁ , γ ₂₂ , γ ₃₃ , γ ₄₄ of the frequency partition can be determined by calculation. It is preferable that the uplink transmission power of the terminal can be controlled after BS1 acquires a new γ value.

  From the above description, according to the uplink transmission power control method provided by the embodiment of the present invention, dynamic transmission and adjustment of γ value between the base station and the SON self-optimization network, and dynamic transmission of the uplink transmission power. Therefore, it is possible to flexibly control uplink interference between cells and optimize network performance.

Third Embodiment This embodiment provides an uplink transmission power control apparatus including a transmission module that is located in a base station and transmits information on γ values corresponding to all or a part of frequency partitions to an upper layer entity. In addition, the present embodiment further supports a receiving module that receives information on reference γ values corresponding to all or part of frequency partitions transmitted by SON, and supports all or part of frequency partitions according to the reference γ values. An adjustment module for adjusting the γ value to be included may be included.

  The embodiment of this example can be referred to the related description of the second example, and it has all the beneficial effects of the above example, so it will not be described in detail here.

  For those skilled in the art, each module or each step of the present invention described above can be realized by a common computing device and may be concentrated on a single computing device or distributed in a network composed of a plurality of computing devices. Or may be implemented by code of a program executable by the computing device, so that they can be stored in a storage device and executed by the computing device, or each of them can be integrated into an integrated circuit block, respectively. Obviously, it is possible to produce or implement multiple modules or steps in them in a single integrated circuit module. Thus, the present invention is not limited to any specified combination of hardware and software.

  The above are only preferred embodiments of the present invention, and do not limit the present invention. Those skilled in the art can make various modifications and variations to the present invention. Any modifications, substitutions, improvements and the like within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims (25)

  An uplink transmission power control method comprising: a base station transmitting γ value information corresponding to a frequency partition of each subframe in a subframe set including one or a plurality of subframes to a terminal.   The uplink transmission power control method according to claim 1, wherein the γ values corresponding to different subframes in the subframe set are the same or different.   The uplink transmission power control method according to claim 1, wherein the frequency partition division schemes in different subframes in the subframe set are the same or different.   When the frequency partition division method of each subframe in the subframe set is the same and the γ value corresponding to each frequency partition is the same, only one γ value is transmitted, and the subframe set is in the frequency partition. The uplink transmission power control method according to claim 1, wherein the uplink transmission power control method is a whole subframe or a partial subframe. The base station transmitting the γ value information corresponding to the frequency partition in the subframe set to the terminal,
The base station transmitting information of the γ values corresponding to all or a part of the frequency partitions in the subframe set to the terminal, wherein information of the γ values corresponding to a part of the frequency partitions is transmitted. When transmitting, the terminal uses a default γ value or a γ value corresponding to an untransmitted frequency partition recently acquired by the terminal as a γ value corresponding to an untransmitted frequency partition. The uplink transmission power control method described in 1.   The uplink according to claim 1, wherein the base station transmits the information of the γ value corresponding to the frequency partition in the subframe set to the terminal via multicast signaling, unicast signaling, or broadcast signaling. Transmission power control method. After the base station transmits the γ value information corresponding to the frequency partition in the subframe set to the terminal,
The uplink according to any one of claims 1 to 6, further comprising: determining transmission power in a corresponding frequency partition according to the γ value corresponding to a different frequency partition after the terminal receives the information. Transmission power control method.   An uplink transmission power control method comprising: a base station transmitting γ value information corresponding to all or a part of frequency partitions to an upper layer entity.   The uplink transmission power control method according to claim 8, wherein the upper layer entity is a self-management network SON.   The γ value is a convergence value of a γ value that is a converged γ value obtained by adjusting the first scheduled time, an instantaneous value of the γ value within the first scheduled time, and a γ value within the first scheduled time. The uplink transmission power control method according to claim 9, comprising at least one of statistical average values.   The method of claim 10, wherein the first scheduled time includes one of one or more subframes, one or more frames, and one or more superframes. Uplink transmission power control method.   The uplink transmission power control method according to any one of claims 9 to 11, wherein the SON includes at least one of a network unit and a functional module in the network unit.   12. The network unit according to claim 9, wherein the network unit includes at least one of a base station, a relay facility, a server, a base station controller, an access service network, a connection service network, a core network, and a core network gateway. The uplink transmission power control method according to any one of the above. The base station triggers to the SON, a trigger when the overall performance of the SON satisfies the first condition, and a trigger when the performance of the network unit satisfies the second condition. Sending the information of the γ value according to a predetermined trigger mechanism including at least one of them,
The first condition is that the SON's service quality threshold is smaller than the SON's scheduled service quality threshold, the SON's network efficiency threshold is smaller than the SON's scheduled network efficiency threshold, and the SON's through-out threshold is The frequency partition of the frequency partition, which is smaller than the scheduled through-out threshold of the SON, the cell cover threshold of the SON is smaller than the cell cover threshold of the SON, the cell capacity threshold of the SON is smaller than the cell capacity threshold of the SON Including at least one of the following conditions: number changed, frequency partition transmit power changed, frequency partition target IOT level changed, base station joined the network,
The network unit wherein the second condition is that the network unit service quality threshold is less than the network unit scheduled service quality threshold, and the network unit network efficiency threshold is less than the network unit scheduled network efficiency threshold The network unit cell capacity threshold is less than the network unit cell cover threshold, the network unit cell capacity threshold is less than the network unit cell capacity threshold. Less than the cell capacity threshold, frequency partition number changed, frequency partition transmit power changed, frequency partition target desired uplink jamming noise Ratio level is changed, the uplink transmission power control method according to any one of claims 9 to 11 base stations, characterized in that it comprises at least one of the condition that participated in the network.   An uplink transmission power control method comprising a step in which a SON transmits information of reference γ values corresponding to all or a part of frequency partitions to a base station. Before the SON transmits the reference γ value information corresponding to all or a part of the frequency partitions to the base station,
The uplink transmission power control method according to claim 15, further comprising the step of the base station transmitting γ value information corresponding to all or some of the frequency partitions to the SON.   The SON transmits the reference γ value information to the base station. The SON transmits the absolute value of the reference γ value to the base station, and the SON transmits the reference γ value to the base station. The uplink transmission power control method according to claim 16, further comprising: transmitting a difference value between the γ value transmitted from the base station to the SON. After the SON transmits the reference γ value information corresponding to all or part of the frequency partition to the base station,
The method of claim 15, further comprising adjusting the γ values corresponding to all or a part of the frequency partitions according to the reference γ value.   The uplink transmission power control method according to any one of claims 15 to 18, wherein the SON includes at least one of a network unit and a functional module in the network unit.   The network unit according to claim 19, wherein the network unit includes at least one of a base station, a relay facility, a server, a base station controller, an access service network, a connection service network, a core network, and a core network gateway. Uplink transmission power control method. At least one of a trigger when the SON is a scheduled cycle, a trigger when the overall performance of the SON satisfies the first condition, and a trigger when the performance of the network unit satisfies the second condition The reference γ value is calculated according to a predetermined trigger mechanism including
The first condition is that the SON's service quality threshold is smaller than the SON's scheduled service quality threshold, the SON's network efficiency threshold is smaller than the SON's scheduled network efficiency threshold, and the SON's through-out threshold is The frequency partition of the frequency partition, which is smaller than the scheduled through-out threshold of the SON, the cell cover threshold of the SON is smaller than the cell cover threshold of the SON, the cell capacity threshold of the SON is smaller than the cell capacity threshold of the SON Including at least one of the following conditions: number changed, frequency partition transmit power changed, frequency partition target IOT level changed, base station joined the network,
The network unit wherein the second condition is that the network unit service quality threshold is less than the network unit scheduled service quality threshold, and the network unit network efficiency threshold is less than the network unit scheduled network efficiency threshold The network unit cell capacity threshold is less than the network unit cell cover threshold, the network unit cell capacity threshold is less than the network unit cell capacity threshold. Less than the cell capacity threshold, frequency partition number changed, frequency partition transmit power changed, frequency partition target desired uplink jamming noise Ratio level is changed, the uplink transmission power control method according to any one of claims 15 to 18 base stations, characterized in that it comprises at least one of the condition that participated in the network. . After the SON transmits the reference γ value information corresponding to all or some of the frequency partitions to the base station,
The uplink transmission power control method according to any one of claims 15 to 18, wherein the base station includes adjusting γ values corresponding to all or a part of frequency partitions according to the reference γ value. An uplink transmission power control apparatus located in a base station,
An uplink transmission power control apparatus comprising: a transmission module that transmits γ value information corresponding to all or a part of frequency partitions to an upper layer entity. A receiving module for receiving information of reference γ values corresponding to all or some of the frequency partitions transmitted by the SON;
The uplink transmission power control apparatus according to claim 23, further comprising an adjustment module that adjusts γ values corresponding to all or some of the frequency partitions according to the reference γ value. The base station triggers to the SON, a trigger when the overall performance of the SON satisfies the first condition, and a trigger when the performance of the network unit satisfies the second condition. Sending the information of the γ value according to a predetermined trigger mechanism including at least one of them,
The first condition is that the SON's service quality threshold is smaller than the SON's scheduled service quality threshold, the SON's network efficiency threshold is smaller than the SON's scheduled network efficiency threshold, and the SON's through-out threshold is The frequency partition of the frequency partition, which is smaller than the scheduled through-out threshold of the SON, the cell cover threshold of the SON is smaller than the cell cover threshold of the SON, the cell capacity threshold of the SON is smaller than the cell capacity threshold of the SON Including at least one of the following conditions: number changed, frequency partition transmit power changed, frequency partition target IOT level changed, base station joined the network,
The network unit wherein the second condition is that the network unit service quality threshold is less than the network unit scheduled service quality threshold, and the network unit network efficiency threshold is less than the network unit scheduled network efficiency threshold The network unit cell capacity threshold is less than the network unit cell cover threshold, the network unit cell capacity threshold is less than the network unit cell capacity threshold. Less than the cell capacity threshold, frequency partition number changed, frequency partition transmit power changed, frequency partition target desired uplink jamming noise Ratio level is changed, the uplink transmission power control apparatus according to claim 23 or 24, characterized in that it comprises at least one of a condition that the base station has joined the network.