CN112203288A - SUL network planning method, device, equipment and storage medium - Google Patents
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Abstract
本发明实施例涉及无线通信技术领域，公开了一种SUL网络规划方法、装置和设备，该方法包括：根据所述网络的上行吞吐率确定第一上行RSRP参考门限；根据所述第一上行RSRP参考门限确定所述网络的第二下行RSRP参考门限；获取所述小区用户的MR数据，根据所述第二下行RSRP参考门限和MR数据计算所述小区的低电平覆盖比例；当所述低电平覆盖比例大于预设第三参考门限时，则启动SUL方案。通过上述方式，本发明实施例可实现SUL网络规划的便利性和准确性。
Embodiments of the present invention relate to the technical field of wireless communication, and disclose a SUL network planning method, device and device. The method includes: determining a first uplink RSRP reference threshold according to an uplink throughput rate of the network; and according to the first uplink RSRP Determine the second downlink RSRP reference threshold of the network with reference to the threshold; obtain the MR data of the user in the cell, and calculate the low-level coverage ratio of the cell according to the second downlink RSRP reference threshold and the MR data; When the level coverage ratio is greater than the preset third reference threshold, the SUL scheme is started. In the above manner, the embodiments of the present invention can realize the convenience and accuracy of SUL network planning.
Description
Technical Field
The embodiment of the invention relates to the technical field of wireless communication, in particular to a SUL network planning method, a device, equipment and a storage medium.
Background
Since the development of wireless communication technology, mobile communication technology is designed according to a single frequency band, and FDD technology uses two independent frequency bands for transmitting information downwards and upwards respectively. The uplink and the downlink of the TDD technology share the same frequency band, that is, the mobile phone and the base station are bound together in the uplink and downlink directions and are not divisible. However, there is always a problem with this design — uplink and downlink imbalance.
The reason is that it is known that the cell coverage is limited by the small transmitting power of the handset, and the higher the frequency of the electromagnetic wave is, the more the attenuation of the electromagnetic wave is in the process of propagation. In the 5G era, the frequency band used is higher and higher, and the phenomenon of unbalanced uplink and downlink coverage is more and more serious due to the large-scale array antenna gain and the time slot ratio difference in the TDD mode on the base station side. The transmit power of macro base stations can reach hundreds of watts (50dBm), while the transmit power of handsets is only in the milliwatt (20dBm) level. The handset transmit power is too low and for this reason we have to think of ways to make up for the coverage difference.
The SUL (uplink and downlink decoupling technology, hereinafter referred to as SUL) breaks through the traditional limitation that the uplink and the downlink are bound at the same frequency band, and transmits the 5G uplink through a lower frequency band (taking 1.8GHz as an example) while enjoying 3.5GHz downlink large capacity, so that the 3.5GHz of the 5G and the 1.8GHz of LTE share the same station and are deployed and covered, the network coverage is greatly improved, the efficiency of network resources is maximized, and the problem of uplink and downlink imbalance can be effectively improved. The 5G system can also carry out uplink transmission, and the unbalanced problem of the uplink and the downlink is more prominent than that of the LTE network, although the unbalanced problem of the uplink and the downlink can be improved by the SUL technology, the SUL needs to be added with the LTE system, and the SUL can be carried out after the existing LTE system is transformed. Under the condition of good 5G uplink (such as the condition that base stations are distributed densely), equipment improvement of SUL is carried out on each site and each sector, and requirements and more requirements are not needed.
In the process of implementing the embodiment of the invention, the inventor finds that at present, more network planning is performed by means of data simulation, and the data simulation result is inaccurate and low in reliability.
Disclosure of Invention
In view of the foregoing, embodiments of the present invention provide a method, an apparatus, and a device for planning an SUL network, which overcome the foregoing problems or at least partially solve the foregoing problems.
According to an aspect of an embodiment of the present invention, there is provided an SUL network planning method, including:
determining a first uplink RSRP reference threshold according to the uplink throughput rate of the network;
determining a second downlink RSRP reference threshold of the network according to the first uplink RSRP reference threshold;
acquiring MR data of the cell user, and calculating the low-level coverage proportion of the cell according to the second downlink RSRP reference threshold and the MR data;
and when the low-level coverage ratio is larger than a preset third reference threshold, starting the SUL scheme.
Preferably, the determining a first uplink RSRP reference threshold according to an uplink throughput rate of the network includes:
the method comprises the steps of obtaining an uplink throughput rate of a network, determining a corresponding RSRP value when the throughput rate is smaller than a preset throughput rate threshold, and determining the RSRP value as a first uplink RSRP reference threshold.
Preferably, the network is a 1.8G FDD network, and the first uplink RSRP reference threshold T1 is-120 dBm.
Preferably, the determining a second downlink RSRP reference threshold T2 of the network according to the first uplink RSRP reference threshold includes:
T2＝15.2-(20-10*log(48*12/2))+T1。
preferably, when the network is a 1.9G TDD network, the determining a second downlink RSRP reference threshold T3 of the network according to the first uplink RSRP reference threshold includes:
T3＝T2-(15.2-12.2)-(17-15)-(20*log(1905/1710))。
preferably, calculating the low level coverage ratio of the cell according to the second downlink RSRP reference threshold and the MR data includes:
acquiring MR data of the cell users;
when the MR data is smaller than the second downlink RSRP reference threshold, determining that the user is a weak coverage user;
and dividing the total number of the weak coverage users by the total number of the cell users to determine the low-level coverage proportion of the cell.
Preferably, the third reference threshold is 10% -20%.
In another aspect of the embodiments of the present invention, an SUL network planning apparatus is provided, including:
a first uplink RSRP reference threshold determination module: the method comprises the steps of determining a first uplink RSRP reference threshold according to an uplink throughput rate of the network;
a second downlink RSRP reference threshold determination module: the RSRP reference threshold is used for determining a second downlink RSRP reference threshold of the network according to the first uplink RSRP reference threshold;
a low level coverage ratio acquisition module: the MR data is used for acquiring the cell users, and the low-level coverage proportion of the cell is calculated according to the second downlink RSRP reference threshold and the MR data;
an SUL network planning scheme determining module: and the SUL scheme is started when the low-level coverage ratio is larger than a preset third reference threshold.
An embodiment of the present invention further provides an SUL network planning apparatus, including: the system comprises a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface complete mutual communication through the communication bus;
the memory is used for storing at least one executable instruction, and the executable instruction causes the processor to execute the SUL network planning method.
The embodiment of the invention also provides a computer storage medium, wherein at least one executable instruction is stored in the storage medium, and the executable instruction enables a processor to execute the SUL network planning method.
According to the SUL network planning method, the device and the equipment provided by the embodiment of the invention, the first uplink RSRP reference threshold is determined according to the data of the existing network, the second downlink RSRP reference threshold is determined according to the uplink RSRP reference threshold, and the network judges whether the SUL scheme is started or not according to the second downlink RSRP reference threshold, so that the flow and difficulty of the SUL network planning are greatly simplified, and the accuracy of the network planning is improved.
The foregoing description is only an overview of the technical solutions of the embodiments of the present invention, and the embodiments of the present invention can be implemented according to the content of the description in order to make the technical means of the embodiments of the present invention more clearly understood, and the detailed description of the present invention is provided below in order to make the foregoing and other objects, features, and advantages of the embodiments of the present invention more clearly understandable.
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Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 illustrates a SUL co-site deployment co-coverage theoretical model;
fig. 2 shows a graph of results of 3.5G and 1.8G uplink throughput rates provided by the embodiment of the present invention;
fig. 3 illustrates a flow chart of SUL network planning provided by an embodiment of the present invention;
fig. 4 shows a schematic diagram of an SUL network planning apparatus provided in an embodiment of the present invention;
fig. 5 shows a schematic diagram of an SUL network planning device according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
As shown in fig. 1, a theoretical model of the SUL decoupling technology, the SUL (uplink and downlink decoupling technology, hereinafter abbreviated as SUL), breaks through the traditional limitation that uplink and downlink are bound to the same frequency band, and transmits 5G uplink through a lower frequency band (herein, 1.8GHz is taken as an example) while enjoying 3.5GHz downlink large capacity, so as to implement co-site deployment and co-coverage of 3.5GHz of 5G and 1.8GHz of LTE, thereby greatly improving network coverage, maximizing efficiency of network resource utilization, and effectively improving the problem of uplink and downlink imbalance. Based on the technical idea of the SUL, the 5G technology is deployed by the same station of 3.5GHz and low frequency 1.8GHz in LTE, the downlink transmission of the 5G utilizes a 3.5GHz frequency band, the uplink transmission and the 1.8GHz of the LTE carry out frequency spectrum sharing, and the 5G is flexibly allocated to the uplink for use according to the idle degree of the LTE FDD. However, the SUL needs to be added with an LTE system, and the current LTE system also needs to be modified to perform the SUL. Under the condition of good uplink of 5G (such as the condition that base stations are distributed densely), equipment transformation of SUL is carried out on each site and each sector, and the method is not required and is unnecessary. The 'precise dropper type' flower arrangement planning and SUL function starting method is characterized in that the 'precise dropper type' flower arrangement planning and SUL function starting method is that the downlink capacity index and the uplink coverage index of the 5G station meet certain requirements, the 5G station plans FDD1800 and starts the SUL function, the 5G uplink and downlink decoupling requirements can be met, and manpower and material resources can be saved.
As shown in fig. 2, an embodiment of the present invention provides an SUL network planning method, including:
110: determining a first uplink RSRP (reference signal received power) reference threshold according to an uplink throughput rate of the network.
Specifically, the method comprises the steps of obtaining an uplink throughput rate of a network, determining a corresponding RSRP value when the throughput rate is smaller than a preset throughput rate threshold, and determining the RSRP value as a first uplink RSRP reference threshold. We set the preset throughput threshold to 5Mbps, as shown in fig. 3, the system compares the measured uplink throughput of the 3.5G band network with the uplink throughput result of the 1.8G band network by acquiring historical uplink sounding signal data, and takes 1.8G uplink SUL SRS RSRP (uplink sounding signal RSRP) as the abscissa, which shows that when the 1.8G SRS RSRP is less than-120 dBm, the 3.5G uplink throughput is less than 5 Mbps. That is to say, when RSRP of the uplink sounding signal in the 1.8G frequency band is less than-120 dBm, the SUL function is turned on, which is not significant for throughput of the 3.5G network, and throughput of the 3.5G network is less than 5 Mbps. When the throughput rate of the 3.5G network is 5Mbps, the RSRP of the 1.8G uplink probe signal is-120 dBm, and therefore, the first uplink RSRP reference threshold T1 is-120 dBm.
In an actual network, the system can easily obtain uplink RSRP data, so that a large amount of uplink RSRP data is obtained through the system, and an optimal first uplink RSRP reference threshold is obtained.
120: and determining a second downlink RSRP reference threshold of the network according to the first uplink RSRP reference threshold.
However, in actual network planning, it is necessary to perform network planning according to the downlink RSRP, and therefore, it is necessary to determine the second downlink RSRP reference threshold according to the first uplink RSRP reference threshold T1 determined in step 110.
The embodiment of the invention provides an optimized algorithm, a second downlink RSRP reference threshold T2 of 1.8G LTE FDD is calculated through the uplink RSRP of the 1.8G network, and then a second downlink RSRP reference threshold T3 of 1.9G LTE TDD is calculated according to the second downlink RSRP of the 1.8G LTE FDD.
The second downlink RSRP reference threshold T2 of the 1.8G LTE FDD is:
t2 ═ CRS (cell reference signal) pilot transmit power of individual REs — uplink SRS transmit power of individual REs, where CRS pilot transmit power of individual REs is 15.2 and uplink SRS transmit power of individual REs is 20-10 × log (48 × 12/2), thus:
T2＝15.2-(20-10*log(48*12/2))+T1。
according to the second downlink RSRP reference threshold T2 of the 1.8G LTE FDD, the second downlink RSRP reference threshold T3 of the 1.9G LTE TDD is determined as:
t3 ═ CRS pilot power difference-antenna gain difference-band propagation loss difference;
wherein the CRS pilot power difference is 15.2-12.2; the antenna gain difference is 17-15; the frequency band propagation loss difference is: 20 log (1905/1710), thus:
T3＝T2-(15.2-12.2)-(17-15)-(20*log(1905/1710))。
according to the above formula, the corresponding downlink RSRP threshold may be derived, as shown in table 1:
TABLE 1
| Type (B) | Threshold value |
| 1.8NR SUL uplink SRS RSRP | -120dBm |
| LTE FDD 1.8G second downlink RSRP | -100dBm |
| LTE TDD 1.9G second downlink RSRP | -106dBm |
130: and acquiring MR data of the cell user, and calculating the low-level coverage proportion of the cell according to the second downlink RSRP reference threshold and the MR data.
Acquiring MR-based RSRP level distribution data of all users of an LTE cell co-located with a 3.5G station, and calculating the MR proportion of low-level weak coverage of the cell according to the cell type (FDD/TDD).
Specifically, to obtain the MR data of the cell user, when the MR data of the user is smaller than the second downlink RSRP reference threshold, it is determined that the user is a weak coverage user;
and dividing the total number of the weak coverage users by the total number of the cell users to determine the low-level coverage proportion of the cell.
140: and when the low-level coverage ratio is larger than a preset third reference threshold, starting the SUL scheme.
And judging whether the ratio of the low-level coverage is greater than a preset third reference threshold value, if so, starting the SUL scheme at the co-sited site, and if not, not starting the SUL scheme.
Since various situations occur in an actual network, the judgment of whether to enable the SUL is carried out on the overall situation of the cell without depending on the situation of certain data, so that the situation of the network can be determined more accurately, and the network planning can be carried out more accurately.
Here, the preset third reference threshold may be set to be between 10% and 20%, and preferably, the embodiment of the present invention is set to be 15%, if the low level coverage ratio is greater than 15%, the SUL scheme is started, otherwise, the SUL scheme is not started.
As shown in table 2, the actual measurement data of some cells:
TABLE 2
All the cells are 1.9G TDD cells, so that the reference threshold of the second downlink RSRP threshold is-106 dBm, the low-level coverage ratio of Cell _1 is 5.6%, the low-level coverage ratio of Cell _2 is 12.5%, the low-level coverage ratio of Cell _3 is 35.8%, the low-level coverage ratio of Cell _4 is 40.6%, the low-level coverage ratio of Cell _5 is 28.4%, and the third reference threshold is set to be 15%, so that the system enables the SUL scheme for Cell _3, Cell _4, and Cell _ 5.
Therefore, the embodiment of the invention determines the first uplink RSRP reference threshold according to the data of the existing network, then determines the second downlink RSRP reference threshold according to the uplink RSRP reference threshold, and the network judges whether to start the SUL scheme according to the second downlink RSRP reference threshold, thereby greatly simplifying the flow and difficulty of SUL network planning and improving the accuracy of network planning. Compared with the prior art, simulation cannot restore a real communication environment in percentage, but the embodiment of the invention judges whether the 3.5G site of the same station needs to use the SUL scheme or not according to the coverage index of the existing network LTE network and the RSRP low-level weak coverage proportion condition of the LTE RSRP and the MR, and can more accurately and rapidly provide a reasonable decoupling site screening scheme compared with the traditional simulation method. Moreover, the conclusion obtained by the scheme has universality, and each key index can be determined according to the actual network condition of each place. The method can not only screen in a large range, but also judge a single station and a single sector. Only need compare current website LTE cover index, just can judge whether this website need use the SUL scheme, can show reduction human cost.
Fig. 4 shows a schematic structural diagram of an SUL network planning apparatus according to an embodiment of the present invention. As shown in fig. 4, the apparatus 300 includes: a first uplink RSRP reference threshold determining module 301, a second downlink RSRP reference threshold determining module 302, a low level coverage ratio obtaining module 303, and an SUL network planning scheme determining module 304.
The first uplink RSRP reference threshold determining module: the method comprises the steps of determining a first uplink RSRP reference threshold according to an uplink throughput rate of the network;
the second downlink RSRP reference threshold determining module: the RSRP reference threshold is used for determining a second downlink RSRP reference threshold of the network according to the first uplink RSRP reference threshold;
the low level coverage proportion obtaining module: the MR data is used for acquiring the cell users, and the low-level coverage proportion of the cell is calculated according to the second downlink RSRP reference threshold and the MR data;
the SUL network planning scheme determination module: and the SUL scheme is started when the low-level coverage ratio is larger than a preset third reference threshold.
Further, the first uplink RSRP reference threshold determining module is further configured to obtain an uplink throughput rate of the network, determine a corresponding RSRP value when the throughput rate is smaller than a preset throughput rate threshold, and determine the RSRP value as the first uplink RSRP reference threshold. When the network is a 1.8G FDD network, the first uplink RSRP reference threshold T1 is-120 dBm.
Further, the second downlink RSRP reference threshold determining module is further configured to determine a second downlink RSRP reference threshold T2 ═ 15.2- (20-10 × log (48 × 12/2)) + T1 of the 1.8G FDD network.
Further, the second downlink RSRP reference threshold determining module is further configured to determine a second downlink RSRP reference threshold T3 ═ T2- (15.2-12.2) - (17-15) - (20 × log (1905/1710)) of the 1.9G TDD network.
Further, the low-level coverage ratio obtaining module is further configured to obtain MR data of the cell user; when the MR data is smaller than the second downlink RSRP reference threshold, determining that the user is a weak coverage user; and dividing the total number of the weak coverage users by the total number of the cell users to determine the low-level coverage proportion of the cell.
By the SUL network planning device provided by the embodiment of the invention, the first uplink RSRP reference threshold is determined according to the data of the existing network, the second downlink RSRP reference threshold is determined according to the uplink RSRP reference threshold, and the network judges whether to start the SUL scheme according to the second downlink RSRP reference threshold, so that the flow and difficulty of the SUL network planning are greatly simplified, and the accuracy of the network planning is improved.
The embodiment of the present invention further provides a computer program product, which is used for executing the SUL network planning method in the foregoing method embodiment.
An embodiment of the present invention provides a non-volatile computer storage medium, where at least one executable instruction is stored in the computer storage medium, and the computer executable instruction may execute the SUL network planning method in any of the above method embodiments.
The executable instructions may be specifically configured to cause the processor to:
determining a first uplink RSRP reference threshold according to the uplink throughput rate of the network;
determining a second downlink RSRP reference threshold of the network according to the first uplink RSRP reference threshold;
acquiring MR data of the cell user, and calculating the low-level coverage proportion of the cell according to the second downlink RSRP reference threshold and the MR data;
and when the low-level coverage ratio is larger than a preset third reference threshold, starting the SUL scheme.
Preferably, the determining a first uplink RSRP reference threshold according to an uplink throughput rate of the network includes:
the method comprises the steps of obtaining an uplink throughput rate of a network, determining a corresponding RSRP value when the throughput rate is smaller than a preset throughput rate threshold, and determining the RSRP value as a first uplink RSRP reference threshold.
Preferably, the network is a 1.8G FDD network, and the first uplink RSRP reference threshold T1 is-120 dBm.
Preferably, the determining a second downlink RSRP reference threshold T2 of the network according to the first uplink RSRP reference threshold includes:
T2＝15.2-(20-10*log(48*12/2))+T1。
preferably, when the network is a 1.9G TDD network, the determining a second downlink RSRP reference threshold T3 of the network according to the first uplink RSRP reference threshold includes:
T3＝T2-(15.2-12.2)-(17-15)-(20*log(1905/1710))。
preferably, calculating the low level coverage ratio of the cell according to the second downlink RSRP reference threshold and the MR data includes:
acquiring MR data of the cell users;
when the MR data is smaller than the second downlink RSRP reference threshold, determining that the user is a weak coverage user;
and dividing the total number of the weak coverage users by the total number of the cell users to determine the low-level coverage proportion of the cell.
Preferably, the third reference threshold is 10% -20%.
In summary, the computer storage medium provided in the embodiments of the present invention determines the first uplink RSRP reference threshold according to the data of the existing network, then determines the second downlink RSRP reference threshold according to the uplink RSRP reference threshold, and the network determines whether to enable the SUL scheme according to the second downlink RSRP reference threshold, thereby greatly simplifying the flow and difficulty of the SUL network planning and improving the accuracy of the network planning.
Fig. 5 is a schematic structural diagram of an SUL network planning device according to an embodiment of the present invention, and the specific embodiment of the present invention does not limit the specific implementation of the device.
As shown in fig. 5, the SUL network planning apparatus may include: a processor (processor)502, a Communications Interface 504, a memory 506, and a communication bus 508.
Wherein: the processor 502, communication interface 504, and memory 506 communicate with one another via a communication bus 508. A communication interface 504 for communicating with network elements of other devices, such as clients or other servers. The processor 502 is configured to execute the program 510, and may specifically execute the relevant steps in the above-described method embodiment for SUL network planning.
In particular, program 510 may include program code that includes computer operating instructions.
The processor 502 may be a central processing unit CPU, or an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement an embodiment of the present invention. The one or more processors included in the cell capacity adjustment device may be the same type of processor, such as one or more CPUs; or may be different types of processors such as one or more CPUs and one or more ASICs.
And a memory 506 for storing a program 510. The memory 506 may comprise high-speed RAM memory, and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.
The program 510 may specifically be used to cause the processor 502 to perform the following operations:
determining a first uplink RSRP reference threshold according to the uplink throughput rate of the network;
determining a second downlink RSRP reference threshold of the network according to the first uplink RSRP reference threshold;
acquiring MR data of the cell user, and calculating the low-level coverage proportion of the cell according to the second downlink RSRP reference threshold and the MR data;
and when the low-level coverage ratio is larger than a preset third reference threshold, starting the SUL scheme.
Preferably, the determining a first uplink RSRP reference threshold according to an uplink throughput rate of the network includes:
the method comprises the steps of obtaining an uplink throughput rate of a network, determining a corresponding RSRP value when the throughput rate is smaller than a preset throughput rate threshold, and determining the RSRP value as a first uplink RSRP reference threshold.
Preferably, the network is a 1.8G FDD network, and the first uplink RSRP reference threshold T1 is-120 dBm.
Preferably, the determining a second downlink RSRP reference threshold T2 of the network according to the first uplink RSRP reference threshold includes:
T2＝15.2-(20-10*log(48*12/2))+T1。
preferably, when the network is a 1.9G TDD network, the determining a second downlink RSRP reference threshold T3 of the network according to the first uplink RSRP reference threshold includes:
T3＝T2-(15.2-12.2)-(17-15)-(20*log(1905/1710))。
preferably, calculating the low level coverage ratio of the cell according to the second downlink RSRP reference threshold and the MR data includes:
acquiring MR data of the cell users;
when the MR data is smaller than the second downlink RSRP reference threshold, determining that the user is a weak coverage user;
and dividing the total number of the weak coverage users by the total number of the cell users to determine the low-level coverage proportion of the cell.
Preferably, the third reference threshold is 10% -20%.
In summary, the SUL network planning device provided in the embodiment of the present invention determines the first uplink RSRP reference threshold according to the data of the existing network, then determines the second downlink RSRP reference threshold according to the uplink RSRP reference threshold, and the network determines whether to enable the SUL scheme according to the second downlink RSRP reference threshold, thereby greatly simplifying the flow and difficulty of the SUL network planning and improving the accuracy of the network planning.
The algorithms or displays presented herein are not inherently related to any particular computer, virtual system, or other apparatus. Various general purpose systems may also be used with the teachings herein. The required structure for constructing such a system will be apparent from the description above. In addition, embodiments of the present invention are not directed to any particular programming language. It is appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any descriptions of specific languages are provided above to disclose the best mode of the invention.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the embodiments of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the invention and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names. The steps in the above embodiments should not be construed as limiting the order of execution unless specified otherwise.
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