WO2020077636A1 - 一种宽带集群的下行功率分配方法 - Google Patents

一种宽带集群的下行功率分配方法 Download PDF

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Publication number
WO2020077636A1
WO2020077636A1 PCT/CN2018/111088 CN2018111088W WO2020077636A1 WO 2020077636 A1 WO2020077636 A1 WO 2020077636A1 CN 2018111088 W CN2018111088 W CN 2018111088W WO 2020077636 A1 WO2020077636 A1 WO 2020077636A1
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group
specific
ratio
user equipment
user
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PCT/CN2018/111088
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English (en)
French (fr)
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薛巧凤
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海能达通信股份有限公司
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Priority to PCT/CN2018/111088 priority Critical patent/WO2020077636A1/zh
Publication of WO2020077636A1 publication Critical patent/WO2020077636A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/18TPC being performed according to specific parameters

Definitions

  • the present application relates to the field of communication technology, and in particular, to a downlink power distribution method for broadband clusters.
  • Broadband trunking service is a point-to-multipoint service, which plays a huge role in the field of private network communications.
  • private network communication there are groups of different types, different functions, and different levels in the same cell. In a proprietary event, each group carries different service functions, different priorities, or different coverage areas.
  • downlink power allocation is one of the effective ways to improve system utilization, ensure demodulation performance of high-priority group users, and improve the performance of edge users under the group, especially for resource constraints System, it is particularly important to reasonably allocate downlink power resources to different groups.
  • the system generally adopts a fixed parameter configuration scheme for downlink power allocation, or simply associates, each antenna port uses a fixed power for transmission; for one power
  • power resources are limited. If the resources cannot be allocated reasonably, it will fail to meet the special requirements of proprietary events or proprietary scenarios, affecting the business experience of the entire system.
  • the present application to solve the technical problem is to provide a broadband downlink power allocation method of the cluster can be set for each user group in a cell a user equipment-specific parameters reasonable P A.
  • an aspect of the present application uses are: to provide a broadband downlink power allocation cluster, the method comprising: obtaining the maximum power efficiency of a corresponding base station-specific parameter initial user equipment P A; in accordance with the pre- setting rules for the user group is paired cell grouping; call relation table pre-established configuration, for each pair of each set of adjusted group user device-specific user parameters P a, wherein the configuration table with the said initial user equipment-specific parameters related to P A.
  • the downlink power allocation method provided herein is adjusted based on the power efficiency of the base station corresponding to the maximum initial user equipment-specific parameters of the P A, power efficiency of the user device after the exclusive parameters P a corresponding base station close to its maximum value, therefore, to ensure that the power station is fully utilized, nor waste does not overflow;
  • the downlink power allocation method provided herein according to a preset rule comprises, for pairing cell group the user group, and then call the pre-established relationship table arranged to obtain the respective pairs of each set of adjusted group user device-specific user parameters P a, it is possible for the cell each user group set a reasonable user equipment-specific parameters P a, thus achieving a rational allocation of downlink power resource object for different groups;
  • this application can pair the group users of the cell according to the rules of group user priority, service attributes, coverage, etc., so as to achieve a reasonable allocation of power resources and ensure special group users Private network communication users) to obtain better demodulation performance and improve the performance of the lower edge users of special group users.
  • FIG. 1 is a schematic flowchart of an embodiment of a downlink power distribution method of a broadband cluster of this application;
  • FIG. 2 is a schematic diagram of an embodiment of step S102 in FIG. 1;
  • FIG. 3 is a schematic flowchart of an embodiment of a configuration relationship table pre-established in FIG. 1;
  • FIG. 4 is a schematic flowchart of an implementation manner of step S103 in FIG. 1;
  • FIG. 5 is a schematic flowchart of an implementation manner of the downlink power allocation method of the broadband cluster of the present application after step S103 in FIG. 1;
  • FIG 6 is a user equipment initial configuration parameters P A, group 1 and group 2 is covered schematic;
  • FIG 7 is a in FIG. 6 group 1 and group 2 using the method of the present application provided a user equipment adjusting the parameters P A, group 1 and group 2 is covered FIG.
  • FIG. 1 is a schematic flowchart of an implementation manner of a downlink power distribution method for a broadband cluster of the present application. The method includes:
  • this step S101 includes using the cell-specific parameter P B configured by the upper layer to obtain the initial user equipment-specific parameter P A corresponding to the maximum power efficiency of the base station.
  • the cell-specific parameter P B has a value range of ⁇ 0, 1, 2, 3 ⁇ , which represents the index of the ratio ⁇ B / ⁇ A , which together with the antenna port determines the value of ⁇ B / ⁇ A , as shown in Table 1 below As shown, where ⁇ A is the ratio of the energy per resource particle (EPRE) of the physical downlink shared channel (PDSCH) in the orthogonal frequency division multiplexing (OFDM) symbol that does not include the reference signal (RS) and the cell-specific RS EPRE , ⁇ B is the ratio of the PDSCH EPRE in the OFDM symbol containing RS to the cell-specific RS EPRE.
  • EPRE energy per resource particle
  • PDSCH physical downlink shared channel
  • OFDM orthogonal frequency division multiplexing
  • the power allocated by the device. P A is increased, the user description data RE power is relatively large, the total power in the case where the same base station, received power of the data RE is relatively large, can improve signal to noise ratio.
  • Power efficiency of the base station is calculated as follows, where, [eta] represents a power efficiency of the base station, P A indicating that no power on the RS OFDM symbols, P B represents the power of the OFDM symbols containing RS is, if P A and P B are equal, When equal to the maximum transmit power, the power efficiency of the base station reaches the maximum, which is 100%.
  • INITIAL UE-specific P A parameter value is the efficiency of the base station when the power reaches a value corresponding to 100%.
  • Table 2 is a table at the base station power efficiency P A P B different configuration, it can be seen from Table 2, when the cell-specific parameter P B is 0, the power efficiency of the base station is 100%, corresponding to the initial user device-specific parameter is 0dB P a; P B cell-specific parameter is 1, the base station power efficiency is 100%, corresponding to the initial user equipment-specific parameter P a is -3dB; cell-specific parameter P when B is 2, the base station power efficiency is 100%, corresponding to the initial user equipment-specific parameter P a is -4.77dB; when a cell-specific parameter P B is 3, the base station power efficiency is 100%, corresponding to the initial user equipment-specific P A parameter is -6dB.
  • S102 Pair and group the group users of the cell according to the preset rules
  • this step S102 specifically includes: the cell contains N groups, where N ⁇ 2, N groups in the cell are divided into M pairing groups, where M ⁇ 1, pairing The group includes at least one high priority group and at least one low priority group.
  • FIG. 2 is a schematic diagram of the head-to-tail group pairing.
  • the above steps include:
  • the N groups in the cell are lined up according to a predetermined principle. Among them, the priority of the N groups in the line decreases from the head of the team to the end of the team. For example, you can line up according to the priority of the group pre-configured by the system. If there are groups with the same priority, you can place the group with the small group ID in the high-priority group; or according to the business attributes.
  • the cell contains N groups, N is an even number.
  • the pairing is performed according to the principle of head-to-tail group pairing.
  • a pairing group contains a high priority Group and a low priority group, and then form M, that is, N / 2 paired groups; for example, the cell contains N groups, N is an odd number, the N groups are queued according to a predetermined principle, press
  • the first-to-tail group pairing principle is used for pairing.
  • a pairing group contains a high-priority group and a low-priority group, and then forms M, that is, (N-1) / 2 pairing groups.
  • pairing of (N + 1) / 2 of groups may default to a user equipment without adjusting the parameter value P a; of course, in other embodiments, the combination of pairing groups may be other, for example, a high priority
  • the level group is paired with two low priority groups, which is not limited in this application.
  • the method provided by the present application further includes establishing a configuration relationship table in advance.
  • FIG. 3 is a schematic flowchart of an implementation manner of establishing a configuration relationship table according to this application.
  • a specific method for establishing a configuration relationship table includes:
  • S201 the first group on the basis of a first step to improve the initial user equipment-specific parameters P A on the value of the user equipment to improve the parameters P A unique within its range; the second group in the initial device-specific user reducing a second step on the basis of the parameters P a, the user equipment is reduced after the parameter P a unique value in the value range; wherein a first group of higher priority than a second group;
  • S202 Calculate the ratio of the reduced power on each resource block of the second group to the increased power on each resource block of the first group, the ratio is defined as the second ratio, the number of resource blocks of the first group and the second The ratio of the number of resource blocks in a group is the second ratio; the configuration table is a collection of second ratios, where the power increased on each resource block of the first group or the reduced power on each resource block of the second group associated with a user equipment-specific parameters P A.
  • the first step and the second step are greater than or equal to 2dB, such as 2dB, 3dB, and so on.
  • the values of the first step and the second step are considered as follows: If the adjustment of the first step and the second step is too small, such as 1dB, the actual measurement results show that the performance impact is not obvious, and it will bring more large overhead; if a first step size, second step size adjustment is too large, in some scenarios would exceed the range of P a, can not be obtained P a reasonable value.
  • the user equipment-specific parameter range for P A ⁇ -6dB, -4.77dB, -3dB, -1.77dB , 0dB, 1dB, 2dB, 3dB ⁇ , base station corresponding to the maximum power efficiency of a user equipment-specific parameters of the initial value P a comprises 0dB, -3dB, -4.77dB, -6dB.
  • the value of the user equipment-specific parameters P A represents the fractional, as shown in Table 3
  • the configuration table when the table below 0dB establishing initial user equipment shown in FIG. 4 is a unique value of the parameter P A;
  • Table 4 the horizontal axis represents the direction of user-specific parameter values P A device of the second group, and the vertical axis represents the direction a group of user equipment-specific parameter values P a, wherein a first group of higher priority than a second group, the table portion 4 is crossed with the first group of resource blocks indicates the number of the second group The ratio of the number of resource blocks.
  • a first group and a second group of initial user equipment-specific parameter P A values are 0dB.
  • the value for the second group, which is a user equipment-specific P A parameter value is reduced, after the reduction; a first group for which a user equipment-specific P A parameter value increases, the increased value may be 1dB, 2dB, 3dB It can be -6dB, -4.77dB, -3dB, -1.77dB.
  • the reduced power of the low priority group is provided to the high priority group, that is, the high priority group increases on each resource block
  • the product of the power of and the number of resource blocks occupied by the high priority group is approximately equal to the product of the reduced power on each resource block of the low priority group and the number of resource blocks occupied by the low priority group.
  • the ratio of the number of resource blocks to the number of resource blocks of the second group is 5/4.
  • the first and second step adjustment steps are not less than 2dB, so there are no data in some boxes in Table 4 below.
  • Table 5 shown in Table 5 below to establish an initial user equipment-specific configuration parameter values P A relationship table is at -3dB; in Table 5 the horizontal axis P A unique parameter values of the second user equipment group, and the vertical axis represents the direction P a user device-specific parameter values of the first group, wherein the first group of higher priority than a second group, the table number of resource blocks intersecting horizontal and vertical portions represent the first group and the second group The ratio of the number of resource blocks.
  • the process of obtaining Table 5 is similar to the above Table 4, and will not be repeated here.
  • Table D the following table the initial establishment of a user equipment-specific parameters P A values shown in FIG. 6 when the configuration table is -4.77dB;
  • Table 6 the horizontal axis represents the parameter P A unique value of the second user group in the group pairing device, longitudinal axis indicating the pairing device-specific user group value of the parameter P a first group, wherein the first group of higher priority than a second group, the first group of resource blocks indicates the part table crossed with The ratio of the number to the number of resource blocks in the second group.
  • the process of obtaining Table 6 is similar to the above Table 4, and will not be repeated here.
  • a user equipment-specific parameters of the initial value P A is -6dB, because they have reached the minimum value of the second user group-specific parameter P A of the apparatus, and therefore does not perform the power adjustment.
  • step S103 specifically includes:
  • S301 Obtain a ratio of the average number of resource blocks of the high-priority group and the average number of resource blocks of the low-priority group in the current pairing group, and the ratio is defined as the first ratio;
  • the average resource block number of the high-priority group combination set and the average resource block number of the low-priority group combination set in the current pairing group may be monitored for a period of time, and then the first ratio may be obtained.
  • This method can ensure that the power does not overflow, that is, the increased power of the high-priority group is slightly lower than the reduced power of the users of the low-priority group.
  • a first ratio of 6/7 is called to obtain all the above Table 4 Table 4 the second ratio, the second ratio and the decreasing order: 5/4, 10/9, 5/6, 3/4, 2/3, 1/2; where the first ratio 6/7 is between 10/9 and 5/6, and the first ratio 6/7 third ratio closest to 10/9, it will match the current set of high priority user group-specific device parameters P a and the unique value of the parameter is reassigned the value of P a 10/9 2dB corresponding user equipment, the pair group low priority in the user equipment group-specific parameter values P a reassign user device-specific parameter values P a and 10/9 corresponding -4.77dB.
  • the power of the high-priority group will increase more than the power of the low-priority group, and the power will overflow; for example, if you choose table 4 5/6, the current paired user equipment-specific parameter values P a high-priority group by group 0dB (look-up table 3 is obtained fraction corresponding to 1) becomes 2dB (look-up table to obtain corresponding points 3
  • the value is 8/5
  • low priority group-specific user equipment by the value of the parameter P a 0dB look-up table 3 is obtained fraction corresponding to 1) becomes -3dB (look-up table corresponding to the 3 points is obtained 1/2)
  • the power of each resource block is reduced by 1/2 times, and the number of resource blocks of the low priority group is 7, then the reduced power of the low priority group is 7
  • the group currently paired high priority group is less than or equal priority has been completed on a set of paired adjust the priority of a user equipment-specific parameters P A in the high priority group.
  • a user equipment-specific parameters P A in the high priority group For example, please refer to FIG. 2 again.
  • M pairing groups are obtained, and the high priority group and the low priority group in each pairing group are adjusted in order from the first pairing group to the last Mth pairing group.
  • the user equipment-specific parameter P A of the group and from the high-priority group of the first paired group to the high-priority group of the M-th paired group, the priorities are sequentially lowered.
  • the method provided in this application further includes:
  • S401 determining whether or not a high priority within the power group currently paired set larger than the power of a high priority within the group on a pair group, wherein the user equipment-specific power-related parameters P A;
  • the fourth ratio may be selected in the order of first approach, third approach, and last approach to the third ratio.
  • step S401 the corresponding relationship table arranged on the call, the closest first obtain the third ratio to the fourth ratio of 3/4, which corresponds to a user equipment-specific parameter P a is 3dB, then the high priority group
  • the methods provided herein further comprising: after the cell issued reassigned each group corresponding to a user equipment-specific parameters P A.
  • the following uses a specific application scenario: improving the demodulation performance of a group of lower-edge users as an example to further describe the method provided by the present application.
  • FIG. 6 contains priority group 1 and group 2, group 1, group 2 above, in a case where the user device an initial configuration parameters P A, two groups of such coverage
  • the broadband trunking system cannot adaptively adjust the modulation and coding method based on the link feedback
  • using the traditional fixed-parameter modulation method results in weak demodulation performance of edge users in group 1 and cannot meet high priority.
  • Group user experience if the method provided in this application is adopted, the downlink power resources are re-allocated according to the priority of the group user, so as to ensure the demodulation performance of the high-priority group user first.
  • FIG. 7 is a schematic diagram of coverage of a group of users after the downlink power is redistributed using the method provided in this application. As can be seen from FIG. 7, if the edge users in group 1 are in the same position, the demodulation performance of FIG. 7 is higher than that of FIG. 6, and the coverage of group 1 in FIG. 7 is wider. That is, by adjusting the downlink power allocation, the performance of the edge users in the group can be well solved.
  • the downlink power allocation method of the present application is provided to adjust the basis of the maximum power efficiency of the base station corresponding to the initial parameters of a user equipment-specific P A, in the user device after Exclusive power efficiency parameter P a corresponding base station close to its maximum value, therefore, to ensure that the power station is fully utilized, nor waste does not overflow;
  • the downlink power allocation method provided herein according to a preset rule comprises for the user group is paired cell group, and then call the pre-established relationship table arranged to obtain the respective pairs of each group after adjusting device-specific user group of the user parameter P a, it is possible for the cell of each group set a reasonable set of user equipment-specific user parameters P a, thus achieving a reasonable allocation of downlink power resource object for different groups; in one application scenario, according to the present application priority user group, service attributes, coverage, etc. Rules, pairing and grouping group users in the cell to achieve reasonable power allocation Source, to ensure that particular user group (

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Abstract

本申请公开了一种宽带集群的下行功率分配方法,所述方法包括:获取基站的功率效率最大时对应的初始用户设备专属参数P A;按照预设规则,对小区的群组用户进行配对分组;调用预先建立的配置关系表,以获取调整后的各个配对组中各个群组用户的用户设备专属参数P A,其中,所述配置关系表与所述初始用户设备专属参数P A相关。通过上述方式,本申请能够为小区中的每个群组用户设置一个合理的用户设备专属参数P A

Description

一种宽带集群的下行功率分配方法 【技术领域】
本申请涉及通信技术领域,特别是涉及一种宽带集群的下行功率分配方法。
【背景技术】
宽带集群业务是一种点对多点的业务,在专网通信领域发挥着巨大的作用。专网通信中,在同一个小区,存在不同类型、不同功能、不同级别的群组。在专有事件中,每个群组承载的业务功能不一样、优先级不一样、或者需要覆盖的范围不一样等。而针对专网通信的特殊应用场景,下行功率分配是提高系统利用率,保证高优先级群组用户的解调性能,以及改善群组下边缘用户性能的有效方式之一,尤其对于资源受限的系统,对不同群组合理分配下行功率资源,变得尤为重要。
本申请的发明人在长期研发过程中发现,现有技术中,系统对于下行功率分配,一般采用固定参数配置的方案,或者进行简单关联,每个天线端口采用固定的功率进行传输;对于一个功率受限系统来说,功率资源是有限的,如果不能合理分配资源,则会无法满足专有事件或专有场景的特殊要求,影响整个系统的业务体验。
【发明内容】
本申请主要解决的技术问题是提供一种宽带集群的下行功率分配方法,能够为小区中的每个群组用户设置一个合理的用户设备专属参数P A
为解决上述技术问题,本申请采用的一个技术方案是:提供一种宽带集群的下行功率分配方法,所述方法包括:获取基站的功率效率最大时对应的初始用户设备专属参数P A;按照预设规则,对小区的群组用户进行配对分组;调用预先建立的配置关系表,以获取调整后的各个配对组中各个群组用户的用户设备专属参数P A,其中所述配置关系表与所述初始用户设备专属参数P A相关。
本申请的有益效果是:区别于现有技术的情况,一方面,本申请所提供的下行功率分配方法是在基站的功率效率最大时对应的初始用户设备专属参数P A的基础上进行调整,调整后的用户设备专属参数P A对应的基站的功率效率接近 其最大值,因此,保证了基站的功率得到充分利用,不溢出也不浪费;另一方面,本申请所提供的下行功率分配方法包括按照预设规则,对小区的群组用户进行配对分组,然后调用预先建立的配置关系表,以获取调整后的各个配对组中各个群组用户的用户设备专属参数P A,从而能够为小区中的每个群组用户设置一个合理的用户设备专属参数P A,进而实现对不同群组合理分配下行功率资源的目的;
在一个应用场景中,本申请可以根据群组用户的优先级、业务属性、覆盖范围等规则,对小区的群组用户进行配对分组,以实现合理分配功率资源,保证特殊群组用户(如,专网通信用户)获得更好的解调性能,改善特殊群组用户的下边缘用户的性能。
【附图说明】
为了更清楚地说明本申请实施例中的技术方案,下面将对实施例描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本申请的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。其中:
图1是本申请宽带集群的下行功率分配方法一实施方式的流程示意图;
图2是图1中步骤S102一实施方式的示意图;
图3是图1中预先建立配置关系表一实施方式的流程示意图;
图4是图1中步骤S103一实施方式的流程示意图;
图5是图1中步骤S103之后本申请宽带集群的下行功率分配方法一实施方式的流程示意图;
图6是初始用户设备参数P A配置下,群组1和群组2的覆盖示意图;
图7是图6中的群组1和群组2采用本申请所提供的方法调整用户设备参数P A后,群组1和群组2的覆盖示意图。
【具体实施方式】
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本申请一部分实施例,而不是全部实施例。基于本申请中的实施例,本领域普通技术人员在没有做出创造性 的劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。
请参阅图1,图1为本申请宽带集群的下行功率分配方法一实施方式的流程示意图,该方法包括:
S101:获取基站的功率效率最大时对应的初始用户设备专属参数P A
在一个实施方式中,该步骤S101包括:利用高层配置的小区专属参数P B,获得基站的功率效率最大时对应的初始用户设备专属参数P A
具体地,小区专属参数P B取值范围为{0,1,2,3},它表示比值ρ BA的索引,它和天线端口共同决定ρ BA的值,如下表1所示,其中ρ A为不包含参考信号(RS)的正交频分复用(OFDM)符号内的物理下行共享信道(PDSCH)每资源颗粒上的能量(EPRE)和小区专属RS EPRE的比值,ρ B为包含RS的OFDM符号内的PDSCH EPRE和小区专属RS EPRE的比值。
表1P B与ρ BA对照表
Figure PCTCN2018111088-appb-000001
用户设备专属参数P A的取值范围为{-6dB、-4.77dB、-3dB、-1.77dB、0dB、1dB、2dB、3dB},改变用户设备专属参数P A的值就改变了基站给用户设备分配的功率。P A增大,说明用户的数据RE功率比较大,在基站总功率不变的情况下,数据RE的接收功率比较大,可以提升信噪比。
基站的功率效率计算公式如下,其中,η表示基站的功率效率,P A表示不包含RS的OFDM符号上的功率,P B表示包含RS的OFDM符号上的功率,当P A与P B相等,且等于最大发射功率时,基站的功率效率达到最大,为100%。初始用户设备专属参数P A值就是当基站的功率效率达到100%时对应的值。
η=min(P A,P B)/max(P A,P B)
在一个应用场景中,如下表2所示,表2为不同P AP B配置下的基站功率效率表,从表2中可以看出,当小区专属参数P B为0,基站的功率效率为100%时,对应的初始用户设备专属参数P A为0dB;小区专属参数P B为1,基站的功率效率为100%时,对应的初始用户设备专属参数P A为-3dB;小区专属参数P B为2,基站的功率效率为100%时,对应的初始用户设备专属参数P A为-4.77dB;小区 专属参数P B为3,基站的功率效率为100%时,对应的初始用户设备专属参数P A为-6dB。
表2不同P AP B配置下的基站功率效率表
Figure PCTCN2018111088-appb-000002
S102:按照预设规则,对小区的群组用户进行配对分组;
具体地,在一个实施方式中,该步骤S102具体包括:小区包含N个群组,其中,N≥2,将小区内的N个群组分为M个配对组,其中,M≥1,配对组中包含至少一个高优先级群组和至少一个低优先级群组。
在一个应用场景中,请参阅图2,图2为首尾群组配对示意图。上述步骤具体包括:
A、将小区内的N个群组按预定原则进行列队,其中,列队内的N个群组的优先级从队首至队末依次降低。例如,可以根据系统预先配置的群组的优先级进行列队,若存在有优先级相同的群组,可将群组标识小的群组置于高优先级群组;或者也可以根据业务属性进行列队,业务属性包括视频业务、语音业务、数据业务,可将视频业务的优先级设为最高,数据业务的优先级设为最低;又或者还可以根据覆盖范围进行列队,将覆盖范围大的设为高优先级;当然,在其他应用场景中,也可综合考虑上述因素或者其他因素进行列队,本申请对此不作限定。
B、将列队后的N个群组按首尾群组配对的原则进行配对,以形成M个配对组,其中,配对组中包含至少一个高优先级群组和至少一个低优先级群组。例如,如图2所示,小区内包含N个群组,N为偶数,该N个群组按预定原则列队后,按首尾群组配对的原则进行配对,一个配对组中包含一个高优先级群组和一个低优先级群组,进而形成M个,即N/2个配对组;又例如,小区内包含N个群组,N为奇数,该N个群组按预定原则列队后,按首尾群组配对的原则进行配对,一个配对组中包含一个高优先级群组和一个低优先级群组,进而形成M个,即(N-1)/2个配对组,对于该小区内未进行配对的第(N+1)/2个群组可 默认为无需进行用户设备参数P A值调整;当然,在其他实施方式中,配对组中的组合方式也可为其他,例如一个高优先级群组和两个低优先级群组进行配对,本申请对此不作限定。
S103:调用预先建立的配置关系表,以获取调整后的各个配对组中各个群组用户的用户设备专属参数P A,其中,配置关系表与初始用户设备专属参数P A相关;
具体地,在一个实施方式中,上述步骤S103之前,本申请所提供的方法还包括预先建立配置关系表。请参阅图3,图3为本申请建立配置关系表一实施方式的流程示意图,具体建立配置关系表的方法包括:
S201:第一群组在初始用户设备专属参数P A的基础上提高第一步长,提高后的用户设备专属参数P A的值在其取值范围内;第二群组在初始用户设备专属参数P A的基础上降低第二步长,降低后的用户设备专属参数P A值在其取值范围内;其中,第一群组的优先级高于第二群组;
S202:计算第二群组每个资源块上降低的功率与第一群组每个资源块上提高的功率的比值,该比值定义为第二比值,第一群组的资源块数与第二群组的资源块数的比值即为第二比值;配置表为第二比值的合集,其中,第一群组每个资源块上提高的功率或第二群组每个资源块上降低的功率与用户设备专属参数P A相关。
在一个应用场景中,上述第一步长、第二步长大于等于2dB,例如2dB、3dB等。上述第一步长、第二步长的取值考虑以下因素:若第一步长、第二步长调整过小,例如1dB,根据实测结果表明,对性能影响不明显,而且会带来较大的系统开销;若第一步长、第二步长调整过大,则在某些场景下会超出P A的取值范围,无法获得较为合理的P A值。
在另一个应用场景中,从上述步骤S101可知,用户设备专属参数P A的取值范围为{-6dB、-4.77dB、-3dB、-1.77dB、0dB、1dB、2dB、3dB},基站的功率效率最大时对应的初始用户设备专属参数P A取值包括0dB、-3dB、-4.77dB、-6dB。
以其中初始用户设备专属参数P A取值为0dB时为例,对上述配置关系表的建立作进一步说明。
A、将用户设备专属参数P A的值采用分数表示,如下表3所示,表3为P A对照表,需要了解的是,dB是一个纯计数单位,对于功率dB=10*1g()。具体为, 首先将P A的值换算成实值t,实值t与P A值的关系为:P A=10*lgt,再将实值t以分数的形式表示。例如,1dB≈10lg1.259,1.259≈5/4;-6dB≈10lg0.251,0.251≈1/4。
表3P A对照表
P A(dB) -6 -4.77 -3 -1.77 0 1 2 3
实值t 0.251 0.333 0.5 0.666 1 1.259 1.585 2
分数值 1/4 1/3 1/2 2/3 1 5/4 8/5 2
B、建立如下表4所示的初始用户设备专属参数P A取值为0dB时配置关系表;表4中横轴方向表示第二群组的用户设备专属参数P A值,纵轴方向表示第一群组的用户设备专属参数P A值,其中,第一群组的优先级高于第二群组,表4中横纵交叉部分表示第一群组的资源块数与第二群组的资源块数的比值。
第一群组和第二群组的初始用户设备专属参数P A值均为0dB。对于第一群组,其用户设备专属参数P A值增加,增加后的取值可以为1dB、2dB、3dB;对于第二群组,其用户设备专属参数P A值降低,降低后的取值可以为-6dB、-4.77dB、-3dB、-1.77dB。
例如,当第一群组的P A值由0dB(查表3得对应的分数值为1)变成2dB(查表3得对应的分数值为8/5),则第一群组用户每个资源块上功率升高(8/5-1=3/5)倍,当第二群组的P A值由0dB(查表3得对应的分数值为1)变成-6dB(查表3得对应的分数值为1/4),则第二群组用户每个资源块上功率降低(1-1/4=3/4)倍,第二群组每个资源块上降低的功率与第一群组每个资源块上提高的功率比值为5/4,由于原则上低优先级群组降低的功率提供给高优先级群组,即高优先级群组每个资源块上提高的功率与高优先级群组所占资源块数的乘积约等于低优先级群组每个资源块上降低的功率与低优先级群组所占资源块数的乘积,则上述第一群组的资源块数与第二群组的资源块数比值为5/4。
而为了防止功率调整频率过大,消耗空口资源,约定第一步长、第二步长调整步长不小于2dB,所以下表4中有些方框内无数据。
表4初始用户设备专属参数P A=0dB对应的配置关系表
P A(dB) -6 -4.77 -3 -1.77 0
0 - - - - -
1 - - - - -
2 5/4 10/9 5/6 - -
3 3/4 2/3 1/2 - -
C、建立如下表5所示的初始用户设备专属参数P A取值为-3dB时配置关系表;表5中横轴方向表示第二群组的用户设备专属参数P A值,纵轴方向表示第一群组的用户设备专属参数P A值,其中,第一群组的优先级高于第二群组,表格中横纵交叉部分表示第一群组的资源块数与第二群组的资源块数的比值。表5获得的过程与上述表4类似,在此不再赘述。
表5初始用户设备专属参数P A=-3dB对应的配置关系表
P A(dB) -6 -4.77 -3
-3 - - -
-1.77 - - -
0 1/2 - -
1 1/3 - -
2 5/22 - -
3 1/6 - -
D、建立如下表6所示的初始用户设备专属参数P A取值为-4.77dB时配置关系表;表6中横轴方向表示配对组中第二群组的用户设备专属参数P A值,纵轴方向表示配对组中第一群组的用户设备专属参数P A值,其中,第一群组的优先级高于第二群组,表格中横纵交叉部分表示第一群组的资源块数与第二群组的资源块数的比值。表6获得的过程与上述表4类似,在此不再赘述。
表6初始用户设备专属参数P A=-4.77dB对应的配置关系表
P A(dB) -6 -4.77
-4.77 - -
-3 - -
-1.77 1/4 -
0 1/8 -
1 1/11 -
2 5/76 -
3 1/20 -
E、初始用户设备专属参数P A取值为-6dB时,由于已经达到第二群组的用户设备专属参数P A的最小值,因此不进行功率调整。
在另一个实施方式中,请参阅图4,该步骤S103具体包括:
S301:获得当前配对组中高优先级群组的平均资源块数与低优先级群组的 平均资源块数的比值,该比值定义为第一比值;
具体地,可以监测一段时间获得当前配对组中高优先级群组合集的平均资源块数和低优先级群组合集的平均资源块数,进而获得第一比值。
S302:将第一比值与配置关系表内的所有第二比值对比,以获得与第一比值最接近的第三比值,其中,第三比值大于等于第一比值;
S303:将当前配对组内的高优先级群组的用户设备专属参数P A值重新分配为与第三比值对应的第一群组的用户设备专属参数P A值相等,将配对组内的低优先级群组的用户设备专属参数P A值重新分配为与第三比值对应的第二群组的用户设备专属参数P A值相等。
该方式可以保证功率没有溢出,即高优先级群组的增加的功率略低于低优先级群组用户减少的功率。
具体地,例如,假设当前初始用户设备专属P A为0dB,第一比值为6/7,则调用上述表4获得表4内的所有第二比值,且第二比值从大到小依次为:5/4、10/9、5/6、3/4、2/3、1/2;其中,第一比值6/7处于10/9与5/6之间,与第一比值6/7最接近的第三比值为10/9,故将当前配对组中高优先级群组的用户设备专属参数P A值重新分配为与10/9对应的用户设备专属参数P A值2dB,将配对组内的低优先级群组的用户设备专属参数P A值重新分配为与10/9对应的用户设备专属参数P A值-4.77dB。
其理由为:若选择表4中比第一比值6/7小的数值,则高优先级群组需要升高的功率会大于低优先级群组降低的功率,功率会溢出;例如,若选择表4中的5/6,则当前配对组中高优先级群组的用户设备专属参数P A值由0dB(查表3得对应的分数值为1)变为2dB(查表3得对应的分数值为8/5),每个资源块上功率升高3/5倍,而高优先级群组的资源块数为6,则高优先级群组升高的功率为6*(3/5)=3.6;低优先级群组的用户设备专属参数P A值由0dB(查表3得对应的分数值为1)变为-3dB(查表3得对应的分数值为1/2),每个资源块上功率降低1/2倍,而低优先级群组的资源块数为7,则低优先级群组降低的功率为7*(1/2)=3.5;高优先级群组需要升高的功率3.6大于低优先级群组降低的功率3.5,功率会溢出;同理,当选择表4中的10/9时,高优先级群组需要升高的功率3.6低于低优先级群组降低的功率4.7,保证功率不会溢出,且浪费少。
在另一个实施方式中,当前配对组中的高优先级群组的优先级小于等于上一个已经调整完用户设备专属参数P A的配对组中高优先级群组的优先级。例如, 请再次参阅图2,图2中获得M个配对组,按从第一个配对组至最后一个第M个配对组的顺序依次调整每个配对组中高优先级群组和低优先级群组的用户设备专属参数P A,且从第一个配对组的高优先级群组至第M个配对组的高优先级群组,优先级依次降低。
在一个应用场景中,请参阅图5,本申请所提供的方法还包括:
S401:判断当前配对组内的高优先级群组的功率是否大于上一个配对组内的高优先级群组的功率,其中,功率与用户设备专属参数P A相关;
S402:若大于,则调用配置关系表,获得与第三比值接近的第四比值,其中,第四比值大于第三比值;
S403:将当前配对组内的高优先级群组的用户设备专属参数P A值重新分配为与第四比值对应的第一群组的用户设备专属参数P A值相等,将当前配对组内的低优先级群组的用户设备专属参数P A值重新分配为与第四比值对应的第二群组的用户设备专属参数P A值相等。
S404:重复上述步骤,直至当前配对组内的高优先级群组的用户设备专属参数P A小于等于上一个配对组内的高优先级群组的用户设备专属参数P A
上述方法保证了N个群组的列队中高优先级群组中次高优先级群组的功率不高于上一个高优先级群组的功率。且为了避免功率浪费,第四比值可以按与第三比值第一接近、第二接近直至最后接近的顺序进行选择。例如,假设初始用户设备专属参数P A=0dB;上一个调整后的配对组内的高优先级群组的用户设备专属参数P A为2dB,高优先级群组的平均资源块数为6,则上一个调整后的配对组内的高优先级群组的用户功率为(8/5*6=9.6);如果当前配对组中的高优先级群组的平均资源块数为5,经上述步骤S301-303调整后,第三比值为2/3,其对应的用户设备专属参数P A为3dB,则高优先级群组的用户功率为(2*5=10);经步骤S401判断后,进入步骤S402,调用上表4对应的配置关系表,首先获得与第三比值最接近的第四比值3/4,其对应的用户设备专属参数P A为3dB,则高优先级群组的用户功率为(2*5=10);再次经步骤S401判断后,进入步骤S402,调用表4对应的配置关系表,获得与第三比值次接近的第四比值5/6,其对应的用户设备专属参数P A为2dB,则高优先级群组的用户功率为(8/5*5=8);再次经步骤S401判断后,进入步骤S404,此时当前配对组内高优先级群组的用户设备专属参数P A为2dB,低优先级群组的用户设备专属参数P A为-3dB。
在其他实施例中,本申请所提供的方法还包括:将重新分配后的小区内各 个群组对应的用户设备专属参数P A下发。
下面以一个具体的应用场景:提高群组的下边缘用户的解调性能为例,对本申请所提供的方法作进一步说明。
请参阅图6-图7,图6中包含群组1和群组2,群组1的优先级高于群组2,在初始用户设备参数P A配置的情况下,两个群组的覆盖范围如图6所示,由于宽带集群系统无法根据链路反馈自适应调整调制编码方式,故使用传统的固定参数的调制方式下,导致群组1下边缘用户解调性能较弱,无法满足高优先级群组用户的体验。此时如果采用本申请所提供的方法,根据群组用户的优先级,重新分配下行功率资源,优先保证高优先级群组用户的解调性能。图7为采用本申请所提供的方法,下行功率重新分配后的,群组用户的覆盖示意图。从图7中可以看出,假如群组1中的边缘用户在同样的位置,图7的解调性能高于图6,同时图7中群组1的覆盖范围更广。即,通过调整下行功率分配,可以很好的解决群组下边缘用户的性能。
总而言之,区别于现有技术的情况,一方面,本申请所提供的下行功率分配方法是在基站的功率效率最大时对应的初始用户设备专属参数P A的基础上进行调整,调整后的用户设备专属参数P A对应的基站的功率效率接近其最大值,因此,保证了基站的功率得到充分利用,不溢出也不浪费;另一方面,本申请所提供的下行功率分配方法包括按照预设规则,对小区的群组用户进行配对分组,然后调用预先建立的配置关系表,以获取调整后的各个配对组中各个群组用户的用户设备专属参数P A,从而能够为小区中的每个群组用户设置一个合理的用户设备专属参数P A,进而实现对不同群组合理分配下行功率资源的目的;在一个应用场景中,本申请可以根据群组用户的优先级、业务属性、覆盖范围等规则,对小区的群组用户进行配对分组,以实现合理分配功率资源,保证特殊群组用户(如,专网通信用户)获得更好的解调性能,改善特殊群组用户的下边缘用户的性能。
以上所述仅为本申请的实施方式,并非因此限制本申请的专利范围,凡是利用本申请说明书及附图内容所作的等效结构或等效流程变换,或直接或间接运用在其他相关的技术领域,均同理包括在本申请的专利保护范围内。

Claims (10)

  1. 一种宽带集群的下行功率分配方法,其中,所述方法包括:
    获取基站的功率效率最大时对应的初始用户设备专属参数P A
    按照预设规则,对小区的群组用户进行配对分组;
    调用预先建立的配置关系表,以获取调整后的各个配对组中各个群组用户的用户设备专属参数P A,其中,所述配置关系表与所述初始用户设备专属参数P A相关。
  2. 根据权利要求1所述的方法,其中,所述获取基站的功率效率最大时对应的初始用户设备专属参数P A包括:
    利用高层配置的小区专属参数P B,获得基站的功率效率最大时对应的初始用户设备专属参数P A
  3. 根据权利要求1所述的方法,其中,所述按照预设规则,对所述小区的群组用户进行配对分组,包括:
    所述小区包含N个群组,其中,N≥2,将所述小区内的所述N个群组分为M个配对组,其中,M≥1,所述配对组中包含至少一个高优先级群组和至少一个低优先级群组。
  4. 根据权利要求3所述的方法,其中,所述小区包含N个群组,其中,N≥2,将所述小区内的所述N个群组分为M个配对组,其中,M≥1,所述配对组中包含至少一个高优先级群组和至少一个低优先级群组,包括:
    将所述小区内的N个群组按预定原则进行列队,其中,所述列队内的N个群组的优先级从队首至队末依次降低;
    将列队后的N个群组按首尾群组配对的原则进行配对,以形成M个配对组,其中,所述配对组中包含至少一个高优先级群组和至少一个低优先级群组。
  5. 根据权利要求3所述的方法,其中,所述方法还包括预先建立所述配置关系表,所述预先建立所述配置关系表包括:
    第一群组在所述初始用户设备专属参数P A的基础上提高第一步长,提高后的用户设备专属参数P A的值在其取值范围内;第二群组在所述初始用户设备专属参数P A的基础上降低第二步长,降低后的用户设备专属参数P A值在其取值范围内;其中,所述第一群组的优先级高于所述第二群组;
    计算第二群组每个资源块上降低的功率与第一群组每个资源块上提高的功率的比值,该比值定义为第二比值,所述第一群组的资源块数与第二群组的资源块数的比值即为所述第二比值,所述配置表为所述第二比值的合集,其中,第一群组每个资源块上提高的功率或第二群组每个资源块上降低的功率与用户设备专属参数P A相关。
  6. 根据权利要求5所述的方法,其中,所述第一步长、所述第二步长大于等于2dB。
  7. 根据权利要求5所述的方法,其中,所述调用预先建立的配置关系表,以获取调整后的各个配对组中各个群组用户的用户设备专属参数P A,包括:
    获得当前配对组中所述高优先级群组的平均资源块数与所述低优先级群组的平均资源块数的比值,所述比值定义为第一比值;
    将所述第一比值与所述配置关系表内的所有所述第二比值对比,以获得与所述第一比值最接近的第三比值,其中,所述第三比值大于等于所述第一比值;
    将当前所述配对组内的所述高优先级群组的用户设备专属参数P A值重新分配为与所述第三比值对应的第一群组的用户设备专属参数P A值相等,将所述配对组内的所述低优先级群组的用户设备专属参数P A值重新分配为与所述第三比值对应的所述第二群组的用户设备专属参数P A值相等。
  8. 根据权利要求7所述的方法,其中,当前配对组中的高优先级群组的优先级小于等于上一个已经调整完用户设备专属参数P A的配对组中高优先级群组的优先级;所述方法还包括:
    判断当前配对组内的高优先级群组的功率是否大于上一个配对组内的高优先级群组的功率,其中,功率与用户设备专属参数P A相关;
    若大于,则调用所述配置关系表,获得与所述第三比值接近的第四比值,其中,所述第四比值大于所述第三比值;
    将当前所述配对组内的所述高优先级群组的用户设备专属参数P A值重新分配为与所述第四比值对应的第一群组的用户设备专属参数P A值相等,将当前所述配对组内的所述低优先级群组的用户设备专属参数P A值重新分配为与所述第四比值对应的所述第二群组的用户设备专属参数P A值相等;
    重复上述步骤,直至当前配对组内的高优先级群组的功率小于等于上一个配对组内的高优先级群组的功率。
  9. 根据权利要求2所述的方法,其中,
    所述小区专属参数P B的取值范围为{0,1,2,3},所述用户设备专属参数P A的取值范围为{-6dB、-4.77dB、-3dB、-1.77dB、0dB、1dB、2dB、3dB};
    所述小区专属参数P B为0,所述基站的功率效率为100%时,对应的所述初始用户设备专属参数P A为0dB;所述小区专属参数P B为1,所述基站的功率效率为100%时,对应的所述初始用户设备专属参数P A为-3dB;所述小区专属参数P B为2,所述基站的功率效率为100%时,对应的所述初始用户设备专属参数P A为-4.77dB;所述小区专属参数P B为3,所述基站的功率效率为100%时,对应的所述初始用户设备专属参数P A为-6dB。
  10. 根据权利要求1所述的方法,其中,所述方法还包括:
    将重新分配后的所述小区内各个群组对应的用户设备专属参数P A下发。
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