CN111148133A

CN111148133A - Method and equipment for expanding capacity of indoor distribution system

Info

Publication number: CN111148133A
Application number: CN201911251068.6A
Authority: CN
Inventors: 姚森森; 李贝; 刘宏嘉; 黄琪飞; 赵伟; 梁宸玮; 邵杭杰; 陈颖; 王森江
Original assignee: China United Network Communications Group Co Ltd
Current assignee: China United Network Communications Group Co Ltd
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2020-05-12
Anticipated expiration: 2039-12-09
Also published as: CN111148133B

Abstract

The embodiment of the invention provides a method and equipment for expanding the capacity of an indoor distribution system, wherein the method comprises the steps of acquiring the coverage area of each Radio Remote Unit (RRU) in a merging cell; the merging cell is obtained by merging a plurality of RRUs; the merging cell is a Long Term Evolution (LTE) cell; determining an overlapping area between every two RRUs in the merging cell according to the coverage area of each RRU in the merging cell; and according to the overlapping area between every two RRUs, performing paired binding on the RRUs meeting preset conditions in all the RRUs, and configuring the paired bound RRUs as the same virtual RRU. The embodiment of the invention can reduce the capacity expansion cost of the indoor distribution system.

Description

Method and equipment for expanding capacity of indoor distribution system

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a method and equipment for expanding capacity of an indoor distribution system.

Background

Long Term Evolution (LTE) mainly carries high-speed signal traffic, and high-speed signal traffic such as video telephony, high-definition video streaming, and large-scale interactive games generally occurs in indoor environments. In order to provide high-quality signal service to indoor users, operators build a large number of indoor distribution systems. With the continuous increase of the current LTE network load, the network capacity expansion work becomes the central importance of the current network optimization work, wherein the distribution system adopting single-channel coverage in the early period of a station, a venue and the like becomes the focus of the capacity expansion work, and because the rooms are built in the early period, the MIMO characteristic cannot be realized under the single-channel distribution, the capacity is limited. At present, some capacity expansion modes are adopted to solve the problem.

In the existing capacity expansion scheme, one is to adopt a dual-channel transformation mode, a path of distribution system is newly added on the basis of a single-channel indoor distribution system to realize a dual-channel characteristic, and the other is to realize in-band capacity expansion on the basis of the existing distribution system, that is, an in-band cell is newly added on the basis of an original Radio Remote Unit (RRU).

However, the first solution involves coordination and construction problems, with long time period and high investment cost, and the second solution involves license cost problems.

Disclosure of Invention

The embodiment of the invention provides a capacity expansion method and equipment of an indoor distribution system, which are used for reducing the capacity expansion cost of the indoor distribution system.

In a first aspect, an embodiment of the present invention provides a method for expanding an indoor distribution system, including:

acquiring the coverage area of each Radio Remote Unit (RRU) in a merging cell; the merging cell is obtained by merging a plurality of RRUs; the merging cell is a Long Term Evolution (LTE) cell;

determining an overlapping area between every two RRUs in the merging cell according to the coverage area of each RRU in the merging cell;

and according to the overlapping area between every two RRUs, performing paired binding on the RRUs meeting preset conditions in all the RRUs, and configuring the paired bound RRUs as the same virtual RRU.

In a possible design, the obtaining the coverage area of each radio remote unit RRU in the merged cell includes:

and for each RRU in the combined cell, closing the rest RRUs except the RRU in the combined cell, and measuring the coverage area of the RRU to obtain the coverage area of the RRU.

In a possible design, the pair-wise binding, according to an overlapping area between every two of all the RRUs, the RRUs that satisfy a preset condition among all the RRUs includes:

and aiming at each RRU in the merging cell, selecting the RRU with the largest overlapping area from the RRUs with the overlapping area with the RRU as a pairing candidate RRU, judging whether the overlapping area between the pairing candidate RRU and the RRU is larger than a preset threshold value, judging whether the pairing candidate RRU has a binding relationship with other RRUs, and if the overlapping area between the pairing candidate RRU and the RRU is larger than the preset threshold value and the pairing candidate RRU does not have the binding relationship with other RRUs, binding the pairing candidate RRU and the RRU in a pairing mode.

sequencing overlapping areas between every two RRUs from large to small to obtain a sequencing list;

and according to the sequencing, sequentially judging whether two RRUs corresponding to each overlapping area have the bound RRUs or not, and if not, binding the two RRUs until the whole sequencing list is traversed.

In one possible design, the RRU is a single channel RRU or a dual channel RRU.

In a possible design, the RRUs are dual-channel RRUs, and the pair-wise binding, according to an overlapping area between every two of the all RRUs, the RRUs that satisfy a preset condition among all the RRUs, and configuring the pair-wise bound RRUs as a same virtual RRU, further includes:

combining channels which respectively participate in binding in two RRUs bound in pairs through a first same-frequency combiner and then accessing the channels into a distribution system;

and after the channels which do not participate in binding in the two RRUs bound in pair are bound, combining the channels through a second same-frequency combiner, and accessing the channels into the distribution system.

In a possible design, the merging cell is a common mode cell of an LTE cell and a GSM cell, the RRUs are dual-channel RRUs, and the paired binding of all RRUs that satisfy a preset condition according to an overlapping area between every two of the RRUs and configuring the paired bound RRUs as a same virtual RRU further includes:

aiming at each RRU in the merging cell, configuring the 2G frequency point in the first channel of the RRU in the protection bandwidth of the LTE cell of the second channel; and configuring the 2G frequency point in the second channel of the RRU in the protection bandwidth of the LTE cell of the first channel.

In a second aspect, an embodiment of the present invention provides an indoor distribution system capacity expansion device, including:

the acquisition module is used for acquiring the coverage area of each RRU in the combined cell; the merging cell is obtained by merging a plurality of RRUs; the merging cell is a Long Term Evolution (LTE) cell;

a determining module, configured to determine an overlapping area between every two RRUs in the merging cell according to a coverage area of each RRU in the merging cell;

and the binding module is used for binding RRUs meeting preset conditions in pairs among all the RRUs according to the overlapping area between every two RRUs and configuring the paired RRUs into the same virtual RRU.

In a third aspect, an embodiment of the present invention provides an indoor subsystem capacity expansion device, including: at least one processor and memory;

the memory stores computer-executable instructions;

the at least one processor executes computer-executable instructions stored by the memory to cause the at least one processor to perform the method as set forth in the first aspect above and in various possible designs of the first aspect.

In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, in which computer-executable instructions are stored, and when a processor executes the computer-executable instructions, the method according to the first aspect and various possible designs of the first aspect are implemented.

The method and the device for capacity expansion of the indoor distribution system provided by the embodiment obtain the coverage area of each Remote Radio Unit (RRU) in a merging cell, the merging cell is obtained by merging a plurality of RRUs, the merging cell is a Long Term Evolution (LTE) cell, an overlapping area between every two RRUs in all the RRUs is determined according to the coverage area of each RRU in the merging cell, the RRUs meeting preset conditions in all the RRUs are bound in pairs according to the overlapping area between every two RRUs, and the RRUs bound in pairs are configured as the same virtual RRU, so that the capacity expansion cost of the indoor distribution system is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a room distribution system according to an embodiment of the present invention;

fig. 2 is a schematic flow chart illustrating a capacity expansion method for an indoor distribution system according to another embodiment of the present invention;

fig. 3 is a schematic flow chart illustrating a capacity expansion method for an indoor distribution system according to another embodiment of the present invention;

FIG. 4 is a schematic diagram of a pre-retrofit topology for a room distribution system according to yet another embodiment of the present invention;

FIG. 5 is a modified topology of the indoor distribution system according to another embodiment of the present invention;

fig. 6 is a schematic diagram of downlink throughput and RANK2 dual-flow ratio before modification of train east station arrival layer according to still another embodiment of the present invention;

fig. 7 is a schematic diagram of a downlink throughput and a RANK2 dual-flow ratio after modification of an east station arrival layer of a train according to another embodiment of the present invention;

fig. 8 is a schematic diagram of downlink throughput of newly added 1506 frequency points and double-flow ratio of RANK2 after the train east station arrival layer is modified according to another embodiment of the present invention;

fig. 9 is a schematic diagram of a KPI dual-flow proportion situation after modification of a train east station arrival layer according to another embodiment of the present invention;

fig. 10 is a schematic diagram of G1800 quality and coverage after transformation of an east station arrival layer of a train according to another embodiment of the present invention;

FIG. 11 is a topology before the dual channel compartmental reconstruction provided by another embodiment of the present invention;

FIG. 12 is a topology diagram of a dual channel chamber partition retrofit according to yet another embodiment of the present invention;

FIG. 13 is a schematic structural diagram of a capacity expansion device of a room distribution system according to another embodiment of the present invention;

FIG. 14 is a schematic structural diagram of a capacity expansion device of a room distribution system according to another embodiment of the present invention;

fig. 15 is a schematic hardware structure diagram of a capacity expansion device of an indoor distribution system according to another embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 is a schematic structural diagram of a room distribution system according to an embodiment of the present invention. As shown in fig. 1, the room distribution system includes a source and a distribution system. The signal source is connected with the distribution system and used for feeding the radio frequency signal into the distribution system, and the distribution system comprises a feeder line, a power divider, a coupler and an indoor antenna. The radio frequency signal fed by the signal source is uniformly distributed at each corner of the room, so that the indoor area is ensured to have ideal signal coverage. Alternatively, the source may be a macro base station, a micro base station, a Radio Remote Unit (RRU), or a repeater. The RRU may convert the baseband optical signal to a radio frequency signal at the remote end and feed the radio frequency signal into the distribution system. The repeater can receive the base station radio frequency signal and feed the signal into the distribution system after amplifying the signal.

Taking the information source as an RRU as an example, in practical application, a baseband processing unit BBU (Building base band unit, BBU) may be centrally placed in a machine room, the RRU may be installed to a floor, optical fiber transmission is adopted between the BBU and the RRU, and the RRU is connected to an antenna through a coaxial cable and a power divider (coupler), that is, the main trunk adopts an optical fiber, and the branches adopt a coaxial cable. Before the introduction of Multiple Input Multiple Output (MIMO) technology, most indoor distribution systems are single-transmission single-reception single-channel indoor distribution systems, operators use single-transmission single-reception (1T 1Receive, 1T1R) RRUs as information sources, a plurality of single-channel antennas are arranged on each indoor floor of a building, and each single-channel antenna on each floor is connected with the RRUs through a feeder line so as to realize the signal coverage of the single-channel indoor distribution system. After the wireless communication technology enters the LTE era, the LTE system introduces the MIMO technology to improve the uplink and downlink throughput of users. And in an open scene such as a stadium, a train station, etc., a plurality of RRUs may be set, and the plurality of RRUs may be set as one cell. So as to ensure the communication service quality of each user terminal in an open scene.

For the current LTE FDD LTE system, the capacity is related to the cell bandwidth, MIMO characteristics, and the number of carriers, and the FDD system is limited by the downlink capacity because the uplink and downlink of the FDD system are independent bandwidths and the user mainly has downlink service. Generally, the larger the peak rate of a single carrier, the larger the cell capacity. The single carrier LTE cell peak rate (Mb/s) is: (total number of REs-number of PDCCHs-number of PBCH-number of PDSCHs) number of symbols corresponding to modulation pattern number of channels of antenna transmission port number of symbol efficiency/1024/1024. The peak rate for a single carrier is: the number of symbols per slot/the time 1slot occupied by each slot is 0.5ms (one system frame is 10ms, each subframe is 1ms, and each subframe includes 2 slots); 1 slot-7 modulation systems (using a normal-length cyclic prefix CP); 1modulation system is 6bits (64 QAM modulation is used). Therefore, the peak rate under a single carrier is symbol number per slot and the time occupied by bit number per symbol/slot is 7 × 6/0.5ms, 84 kbps.

Taking a 20M bandwidth as an example, 150 RBs are used for data transmission under the bandwidth, each RB includes 12 subcarriers, and 1200 subcarriers are summed, so that the peak rate under a single antenna is 1200 × 84kbps — 150.8 Mbps. Except for PDCCH, reference signal, PBCH, PSS/SSS and 25% overhead of coding, the maximum rate really available for transmitting user data is 150.8Mbps 75% ═ 75.6Mbps in non-MIMO scenarios. In a2 x 2MIMO scenario, the peak rate is 2 times that of a single antenna, and with 25% overhead, the single carrier antenna peak rate is 7 x 6/0.5 x 1200 x 2 x 75% — 151.200 Mbps.

In 4 x 4MIMO, the peak rate is 4 times 403.2Mbps for a single antenna, with 302.4Mbps being the overhead peak rate removed.

The measurement and calculation of non-MIMO, 2 × 2MIMO and 4 × 4MIMO under the bandwidth of 20M are compared in the above way, and the resource inventory and user perception speed increase can be realized in the MIMO way under the existing resources.

TABLE 1 comparison of non-MIMO, 2X 2MIMO, 4X 4MIMO

Therefore, with the continuous increase of the load of the current LTE network, the network capacity expansion work becomes the central importance of the current network optimization work, wherein the distribution system adopting single-channel coverage in the early period of a station, a venue and the like becomes the focus of the capacity expansion work, and the capacity is limited because the rooms are built in the early period and the MIMO characteristic cannot be realized under the single-channel distribution. At present, some expansion methods are adopted to solve the problem. For example, the first mode may adopt two-channel modification, and a new path of distribution system is added to realize the MIMO function, so as to improve the system capacity; in the second mode, the capacity expansion in the RRU band can be adopted, and an independent same-frequency cell is newly added in the same RRU; the third mode can adopt an expansion mode of newly increased RRUs and a mode of newly increased pilot frequency cells; the fourth mode can be cell splitting, and a plurality of RRU cells are combined and removed originally, and a plurality of cells with the same frequency point are newly added. However, the first method needs to involve a new path distribution system to realize the dual-channel characteristic, which involves the problems of coordination and construction, and has long time period and high investment cost; in the second mode, an in-band cell needs to be added on the basis of the original channel of the original RRU, the License cost problem needs to be involved, and in addition, the total power of the RRU is limited; the third mode involves the consideration of hardware cost, placement space and the like of the newly added RRU; the fourth method is to split the cells, which may cause the interference between adjacent cells to be aggravated, the communication quality to be reduced, and the user perception to be affected. Based on this, the present embodiment provides a method for expanding the capacity of an indoor subsystem, so as to reduce the cost of expanding the capacity of the indoor subsystem.

The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

Fig. 2 is a schematic flow chart illustrating a capacity expansion method of an indoor distribution system according to another embodiment of the present invention. As shown in fig. 2, the method includes:

201. acquiring the coverage area of each Radio Remote Unit (RRU) in a merging cell; the merging cell is obtained by merging a plurality of RRUs; the merging cell is a Long Term Evolution (LTE) cell.

In practical applications, the execution subject of this embodiment may be a control terminal of the indoor distribution system, and the control terminal may be a background server.

In this embodiment, the merging cell refers to a logical cell formed by merging multiple RRUs in an open scene such as a station, a stadium, and a meeting place.

Optionally, the obtaining the coverage area of each radio remote unit RRU in the merged cell includes:

Optionally, the RRU is a single-channel RRU or a dual-channel RRU.

Specifically, assuming that the merging cell includes A, B, C, D and other 4 RRUs, when the coverage area of a is obtained, B, C, D is closed, and a dedicated test tool is used for testing to obtain the coverage area corresponding to a. Certainly, if a certain RRU in B, C, D is far away from a and does not generate interference, it may not be necessary to turn off the RRU, which is not limited in this embodiment. The remaining RRUs (B, C and D) are tested in turn in the manner of testing the coverage area of a. The coverage area of each RRU in the merged cell can be obtained.

202. And determining the overlapping area between every two RRUs in the merging cell according to the coverage area of each RRU in the merging cell.

In this embodiment, assuming that the merging cell includes A, B, C, D and other 4 RRUs, it is necessary to determine an overlapping area AB between a and B, an overlapping area AC between a and C, an overlapping area AD between a and D, an overlapping area BC between B and C, an overlapping area BD between B and D, and an overlapping area CD between C and D.

203. And according to the overlapping area between every two RRUs, performing paired binding on the RRUs meeting preset conditions in all the RRUs, and configuring the paired bound RRUs as the same virtual RRU.

In this embodiment, according to the overlapping area between every two RRUs, there are multiple ways of performing pair-wise binding on RRUs satisfying the preset condition among all RRUs:

in a specific implementation manner, the pair-wise binding, according to an overlapping area between every two of the all RRUs, the RRUs that satisfy a preset condition among all the RRUs includes:

Specifically, assume that the merging cell includes A, B, C, D and other 4 RRUs, and each overlapping region includes an overlapping region ab between a and B, an overlapping region ac between a and C, an overlapping region ad between a and D, an overlapping region bc between B and C, an overlapping region bd between B and D, and an overlapping region cd between C and D. And if the ab is greater than the preset threshold value and the b has no binding relationship with other RRUs (c and d), binding the a and the b. By analogy, binding objects are selected for B, C, D, respectively. Of course, if a is bound to B, then only C and D may be processed in the next steps in order to save computation.

Specifically, assume that the merging cell includes A, B, C, D and other 4 RRUs, and each overlapping region includes an overlapping region ab between a and B, an overlapping region ac between a and C, an overlapping region ad between a and D, an overlapping region bc between B and C, an overlapping region bd between B and D, and an overlapping region cd between C and D. The overlapping regions (ab, ac, ad, bc, bd, cd) can be sorted from large to small, assuming that the sorting result is ab > ac > ad > bc > bd > cd, then the largest A and B corresponding to the ab can be bound firstly, and secondly, because the A and the B have the binding relationship, two RRUs corresponding to the ac, ad, bc and bd related to the A and the B can not be bound again, and C and D corresponding to the cd do not have the binding relationship, then C and D can be bound. The binding results obtained finally are binding A and B, and binding C and D.

In this embodiment, when RRUs meeting the conditions are bound, two RRUs are defined as the same RRU in a simulation manner, and data is configured into a dual-flow system cell, thereby implementing a2 × 2MIMO characteristic. Specifically, the network manager may perform data configuration through the background controller. For example, may be defined by the manufacturer.

Fig. 4 and 5 show a topology before modification of the room distribution system according to another embodiment of the present invention, and fig. 5 shows a topology after modification of the room distribution system according to another embodiment of the present invention, as shown in fig. 4 and 5, in this embodiment, 2 cells 1T1R are combined into a cell 2T2R, so that the capacity expansion of the single-channel room distribution system is realized without increasing hardware cost and celesense.

In the capacity expansion method for the indoor distribution system, the coverage area of each remote radio unit RRU in a merging cell is obtained, the merging cell is obtained by merging a plurality of RRUs, the merging cell is a long term evolution LTE cell, an overlapping area between every two RRUs in all the RRUs is determined according to the coverage area of each RRU in the merging cell, the RRUs meeting preset conditions in all the RRUs are bound in pairs according to the overlapping area between every two RRUs in all the RRUs, and the RRUs bound in pairs are configured as the same virtual RRU, so that the capacity expansion cost of the indoor distribution system is reduced.

Fig. 3 is a schematic flow chart of a capacity expansion method for an indoor distribution system according to another embodiment of the present invention. As shown in fig. 3, on the basis of the foregoing embodiment, in this embodiment, a further modification of a dual-channel RRU is implemented to implement a 4 × 2MIMO characteristic, where the RRU is a dual-channel RRU, and specifically, the method may include:

301. acquiring the coverage area of each Radio Remote Unit (RRU) in a merging cell; the merging cell is obtained by merging a plurality of RRUs; the merging cell is a Long Term Evolution (LTE) cell.

302. And determining the overlapping area between every two RRUs in the merging cell according to the coverage area of each RRU in the merging cell.

303. And according to the overlapping area between every two RRUs, performing paired binding on the RRUs meeting preset conditions in all the RRUs, and configuring the paired bound RRUs as the same virtual RRU.

Steps 301 to 303 in this embodiment are similar to steps 201 to 203 in the above embodiment, and are not described again here.

304. And combining channels which respectively participate in the binding in the two RRUs bound in pair through a first same-frequency combiner and then accessing the channels into the distribution system.

305. And after the channels which do not participate in binding in the two RRUs bound in pair are bound, combining the channels through a second same-frequency combiner, and accessing the channels into the distribution system.

In practical application, the method is also suitable for two-channel fast zero-cost reconstruction multiple channels, because the existing network of 4T4RRRU occupies less area, taking two-channel RRU as an example, for a two-channel room, RRU with two channels is obtained according to steps 301 to 304, a first channel a1 in a is bound with another RRU with a sufficiently large overlapping area with a, a first channel B1 in B is bound, then a1 and B1 are combined by a first same-frequency combiner and then are accessed into a distribution system, so that 2 x 2MIMO characteristics are realized, further, according to step 305, a remaining second channel a2 in a is bound with a remaining second channel B2 in B, and are accessed into the distribution system after being combined by a second same-frequency combiner, which is equivalent to realizing one 2 x 2 characteristic, and the combination finally realizes 4 x 4MIMO on the basis of not increasing and not changing the original distribution system investment, the user perception multiplication and the full utilization of frequency resources are realized. Specifically, referring to fig. 11 and 12, fig. 11 is a topology before the two-channel chamber partition transformation provided by another embodiment of the present invention, and fig. 12 is a topology after the two-channel chamber partition transformation provided by another embodiment of the present invention. As shown in fig. 11 and 12, the theoretical rate is 151.2Mbps before modification, and after modification, the theoretical rate is doubled to reach 302.4 Mbps.

In the capacity expansion method of the indoor subsystem provided in this embodiment, two RRUs are respectively bound in a dual channel manner, that is, in two RRUs (a and B) having a binding relationship, an a1 channel of a is bound with a B1 channel of B, and an a2 channel of a is bound with a B2 channel of B, so that 4 × 4MIMO is implemented without newly increasing investment and without changing an original distribution system, and user perception multiplication and full utilization of frequency resources are implemented.

Optionally, in a specific embodiment, the merging cell is a common mode cell of an LTE cell and a GSM cell, and after step 305, the method may further include:

306. aiming at each RRU in the merging cell, configuring the 2G frequency point in the first channel of the RRU in the protection bandwidth of the LTE cell of the second channel; and configuring the 2G frequency point in the second channel of the RRU in the protection bandwidth of the LTE cell of the first channel.

In this embodiment, for a common mode network, that is, there are both LTE frequency points and 2G frequency points, in the prior art, a frequency band is generally divided into two parts, one part is applied to LTE, and the other part is applied to 2G. For example, assuming a frequency band of 30M, 20M may be used for LTE, with the remaining 10M applied to 2G. However, in the present embodiment, in the above steps 301 to 305, both channels of the dual-channel RRU are already used, and it can be understood that, when both channels are used, one channel will occupy a 20M frequency band in 30M, and the other channel will occupy the remaining 10M frequency band in 30M, and in order to implement a 2G network, in this embodiment, a manner of setting a 2G frequency point in a protection bandwidth is adopted. Specifically, since the 2G setting of the same cell is not allowed in the guard band of the cell. Then, the 2G frequency point may be set in the guard band of the adjacent cell, for example, in this embodiment, the 2G frequency point of the first channel is set in the guard band of the cell of the second channel, and the 2G frequency point of the second channel is set in the guard band of the cell of the first channel.

In the capacity expansion method for the indoor distribution system provided by this embodiment, the 2G frequency points are respectively configured in the protection bandwidths of two cell batches of each RRU for the common-mode system, so that the function from a single-channel single carrier to a dual-channel dual carrier is realized on the basis of not changing the original distribution system without newly increasing investment, and meanwhile, the coexistence of the G network and the LTE dual carrier in the limited bandwidth is also ensured for the GL common-mode system, so that the frequency resources are fully utilized.

After the implementation of the scheme is adopted by the train east station arrival layer shown in the following table, the original 1650 single-channel single-carrier is transformed into 1650/1506 double-channel double-carrier frequency points, so that each double-channel RRU resource is fully utilized. The field DT test pair is shown in the following table:

TABLE 2 comparison of test indexes before and after transformation

The following describes in detail beneficial effects of the method for expanding a volume of a room distribution system according to an embodiment of the present invention with reference to fig. 6 to 10. Fig. 6 is a schematic diagram of downlink throughput and RANK2 dual-flow ratio before modification of train east station arrival layer according to still another embodiment of the present invention; fig. 7 is a schematic diagram of a downlink throughput and a RANK2 dual-flow ratio after modification of an east station arrival layer of a train according to another embodiment of the present invention; fig. 8 is a schematic diagram of downlink throughput of newly added 1506 frequency points and double-flow ratio of RANK2 after the train east station arrival layer is modified according to another embodiment of the present invention; fig. 9 is a schematic diagram of a KPI dual-flow proportion situation after modification of a train east station arrival layer according to another embodiment of the present invention; fig. 10 is a schematic diagram of G1800 quality and coverage after transformation of an east station arrival layer of a train according to another embodiment of the present invention.

Referring to fig. 6 to 10, in a test situation, a dual-channel function is realized and a 1506 frequency point second carrier is newly added on the basis of the existing distribution system through innovative modification, so that the perception index is obviously improved, and the effect of the innovative modification scheme is remarkable.

After the scheme is adopted and implemented, it can be seen on KPI that all cells are realized as double-flow cells from single-flow cells, the double-flow occupation ratio is higher than 70%, and the double-flow transformation effect is obvious. In addition, by fully utilizing the RRU dual-channel resources, the dual-carrier dual-channel function is realized under the condition that in-band dual-carrier license is not adopted, compared with the license with 8 dimensions of in-band dual-carrier in the traditional configuration mode, the power resources of 60W of each channel of the RRU can be fully utilized, and the user perception and network capacity improvement effects are optimal.

In addition, 2G frequency points are configured in the protection bandwidth of the LTE 1506 and 1650 frequency points, coexistence of LTE 150610M + 165020M + G1800 networks is realized in the communication own 30M frequency bandwidth, and meanwhile, the coverage and the quality are better in the test condition of the 2G network.

TABLE 3 GSM network test indexes after reconstruction

Testing tasks	RxLev Sub mean (dBm)	RxQual Sub mean (dB)	C/I mean value
				DCS1800	-71.92	0.22	22.17

Fig. 13 is a schematic structural diagram of a capacity expansion device of a room distribution system according to another embodiment of the present invention. As shown in FIG. 13, the room subsystem capacity expansion device 130 includes: an acquisition module 131, a determination module 132, and a binding module 133.

An obtaining module 131, configured to obtain a coverage area of each radio remote unit RRU in a merging cell; the merging cell is obtained by merging a plurality of RRUs; the merging cell is a Long Term Evolution (LTE) cell;

a determining module 132, configured to determine an overlapping area between every two RRUs in all the RRUs according to a coverage area of each RRU in the merging cell;

a binding module 133, configured to bind, in pairs, the RRUs that meet a preset condition among all the RRUs according to an overlapping area between every two of the all the RRUs, and configure the RRUs that are bound in pairs as the same virtual RRU.

In the capacity expansion equipment of the indoor distribution system provided by the embodiment of the invention, the acquisition module acquires the coverage area of each RRU in the merged cell; the merging cell is obtained by merging a plurality of RRUs; the merging cell is a Long Term Evolution (LTE) cell; the determining module determines an overlapping area between every two RRUs according to the coverage area of each RRU in the merging cell; and the binding module binds RRUs meeting preset conditions in all the RRUs in pairs according to the overlapping area between every two RRUs, and configures the paired RRUs into the same virtual RRU, so that the capacity expansion cost of the indoor distribution system is reduced.

Fig. 14 is a schematic structural diagram of a capacity expansion device of a room distribution system according to another embodiment of the present invention. As shown in fig. 14, the indoor subsystem capacity expansion device 130 further includes: a first access module 134, a second access module 135, and a configuration module 136.

Optionally, the obtaining module 131 is specifically configured to:

Optionally, the binding module 133 is specifically configured to:

Optionally, the RRU is a single-channel RRU or a dual-channel RRU.

Optionally, the RRUs are dual-channel RRUs, and the apparatus 130 further includes, according to an overlapping area between every two of the all RRUs:

the first access module 134 is configured to combine channels that participate in binding respectively in two RRUs that are bound in pair through a first same-frequency combiner, and then access the distribution system;

and a second access module 135, configured to bind channels that do not participate in binding in two RRUs that are bound in pair, and access the distribution system after combining through a second same-frequency combiner.

Optionally, the merging cell is a common mode cell of an LTE cell and a GSM cell, and the apparatus 130 further includes:

a configuration module 136, configured to configure, for each RRU in the merged cell, a 2G frequency point in a first channel of the RRU within a protection bandwidth of a second channel LTE cell; and configuring the 2G frequency point in the second channel of the RRU in the protection bandwidth of the LTE cell of the first channel.

The capacity expansion device of the indoor distribution system provided by the embodiment of the invention can be used for executing the method embodiment, the implementation principle and the technical effect are similar, and the details are not repeated here.

Fig. 15 is a schematic hardware structure diagram of a capacity expansion device of an indoor distribution system according to another embodiment of the present invention. As shown in fig. 15, the capacity expansion device 150 of the indoor subsystem according to this embodiment includes: at least one processor 1501 and memory 1502. The room subsystem flash unit 150 also includes a communication component 1503. The processor 1501, the memory 1502, and the communication section 1503 are connected by a bus 1504.

In a specific implementation, the at least one processor 1501 executes the computer-executable instructions stored in the memory 1502, so that the at least one processor 1501 executes the room subsystem capacity expansion method as described above for the room subsystem capacity expansion device 150.

When the steps of pair binding, parameter configuration, and the like in this embodiment are executed by the server, the communication component 1503 may send the relevant parameters of the RRU to be processed to the server.

For a specific implementation process of the processor 1501, reference may be made to the above method embodiments, which implement similar principles and technical effects, and this embodiment is not described herein again.

In the embodiment shown in fig. 15, it should be understood that the Processor may be a Central Processing Unit (CPU), other general-purpose processors, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor, or in a combination of the hardware and software modules within the processor.

The memory may comprise high speed RAM memory and may also include non-volatile storage NVM, such as at least one disk memory.

The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, the buses in the figures of the present application are not limited to only one bus or one type of bus.

The application also provides a computer-readable storage medium, wherein computer-executable instructions are stored in the computer-readable storage medium, and when a processor executes the computer-executable instructions, the method for expanding the capacity of the indoor subsystem, which is executed by the capacity expansion equipment of the indoor subsystem, is realized.

The computer-readable storage medium may be implemented by any type of volatile or non-volatile memory device or combination thereof, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk. Readable storage media can be any available media that can be accessed by a general purpose or special purpose computer.

An exemplary readable storage medium is coupled to the processor such the processor can read information from, and write information to, the readable storage medium. Of course, the readable storage medium may also be an integral part of the processor. The processor and the readable storage medium may reside in an Application Specific Integrated Circuits (ASIC). Of course, the processor and the readable storage medium may also reside as discrete components in the apparatus.

Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A capacity expansion method of an indoor distribution system is characterized by comprising the following steps:

2. The method of claim 1, wherein the obtaining the coverage area of each Remote Radio Unit (RRU) in the merged cell comprises:

3. The method of claim 1, wherein the pair-wise binding, according to an overlapping area between every two of the all RRUs, the RRUs that satisfy a preset condition among the all RRUs comprises:

4. The method of claim 1, wherein the pair-wise binding, according to an overlapping area between every two of the all RRUs, the RRUs that satisfy a preset condition among the all RRUs comprises:

5. The method of any of claims 1-4, wherein the RRU is a single-channel RRU or a dual-channel RRU.

6. The method according to any one of claims 1 to 4, wherein the RRUs are dual-channel RRUs, and the method further comprises, after pairwise binding, according to an overlapping area between two RRUs of all the RRUs, the RRUs meeting a preset condition among all the RRUs and configuring the paired RRUs as a same virtual RRU:

7. The method according to any one of claims 1 to 4, wherein the merging cell is a common mode cell of an LTE cell and a GSM cell, the RRUs are dual-channel RRUs, and the pairwise bundling of the RRUs satisfying a preset condition among all the RRUs according to an overlapping area between every two of the RRUs and configuring the pairwise bundled RRUs as the same virtual RRU further comprises:

8. An indoor subsystem capacity expansion device, comprising:

9. An indoor subsystem capacity expansion device, comprising: at least one processor and memory;

the memory stores computer-executable instructions;

the at least one processor executing computer-executable instructions stored by the memory causes the at least one processor to perform the method of expanding a volume of an indoor subsystem as claimed in any one of claims 1 to 7.

10. A computer-readable storage medium having computer-executable instructions stored thereon, which when executed by a processor, implement the method of capacity expansion of a room subsystem according to any one of claims 1 to 7.