CN112738896B - Internet of things data transmission method, base station controller and digital simulcasting system - Google Patents
Internet of things data transmission method, base station controller and digital simulcasting system Download PDFInfo
- Publication number
- CN112738896B CN112738896B CN202011564577.7A CN202011564577A CN112738896B CN 112738896 B CN112738896 B CN 112738896B CN 202011564577 A CN202011564577 A CN 202011564577A CN 112738896 B CN112738896 B CN 112738896B
- Authority
- CN
- China
- Prior art keywords
- internet
- things
- simulcast
- base station
- simulcasting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000005540 biological transmission Effects 0.000 title claims abstract description 16
- 230000011664 signaling Effects 0.000 claims description 15
- 108091006146 Channels Proteins 0.000 description 22
- 238000004891 communication Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 3
- 238000005192 partition Methods 0.000 description 2
- 238000013515 script Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 238000011022 operating instruction Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The embodiment of the invention provides a data transmission method of an Internet of things, a base station controller and a digital simulcasting system. All base stations under the system are divided into at least two simulcasting areas, wherein adjacent base stations belong to different simulcasting areas, and the coverage areas of the base stations in the same simulcasting area are not overlapped; different simulcasting areas are configured with different time frequency resources, so that the service terminals of the internet of things in different simulcasting areas do not simultaneously send uplink signals on the same time frequency; the method comprises the following steps: a base station receives an uplink signal; the base station forwards the uplink signal reported on the allocated time slot of the non-local simulcast area to an adjacent base station; the base station performs joint demodulation or judgment and selection on the uplink signal reported by the service terminal of the internet of things in the simulcast region; the uplink signal reported by the simulcast regional internet of things service terminal comprises: and at least one of an uplink signal reported by the service terminal of the internet of things in the simulcasting area and an uplink signal forwarded by the adjacent base station on the allocated time slot of the simulcasting area.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a data transmission method of an internet of things, a base station controller and a digital simulcasting system.
Background
Digital simulcast systems are currently used to provide voice services to interphones. In the same digital simulcast system, the base stations in all simulcast areas all adopt the same pair of uplink and downlink working frequencies. The system selects the uplink multi-path signals, and all other base stations transmit the selected signals.
With the development of the internet of things, the demand of distributing the internet of things service terminal to develop the internet of things data service exists. However, the existing simulcast channel using method is more suitable for voice service and is not suitable for data service of internet of things with different terminals uplink different data at the same time, because:
the existing simulcast communication system can judge and select the signals of the messages reported simultaneously, only one terminal information can be reported successfully at the same frequency point at the same time (time slot), and if the existing simulcast channel using mode is directly used for transmission, the problem that although a plurality of base stations are provided, the channel waste is serious can occur.
Disclosure of Invention
In view of this, embodiments of the present invention provide a data transmission method for internet of things, a base station controller, and a digital simulcasting system, so as to improve channel utilization.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
a data transmission method of the Internet of things is based on a digital simulcast system; all base stations under the digital simulcasting system are divided into at least two simulcasting areas, wherein adjacent base stations belong to different simulcasting areas, and coverage areas of the base stations in the same simulcasting area are not overlapped so that different base stations in the same simulcasting area can simultaneously receive uplink signals without mutual interference; different simulcasting areas are configured with different time-frequency resources, so that the service terminals of the internet of things in different simulcasting areas do not simultaneously send uplink signals on the same frequency and the same time slot;
the method comprises the following steps:
a base station receives an uplink signal; the uplink signal includes: at least one of an uplink signal reported by the service terminal of the internet of things and an uplink signal forwarded by an adjacent base station;
the base station forwards an uplink signal reported by the service terminal of the internet of things on the allocated time slot of the non-local simulcast area to an adjacent base station;
the base station discards an uplink signal reported by an Internet of things service terminal in a non-local simulcast region on an allocated time slot of the local simulcast region;
the base station carries out joint demodulation or judgment and selection on the uplink signal reported by the service terminal of the internet of things in the simulcast region; the uplink signal reported by the service terminal of the internet of things in the simulcast area comprises: and at least one of an uplink signal reported by the service terminal of the internet of things in the simulcast region and an uplink signal forwarded by the adjacent base station on the allocated time slot of the simulcast region.
Optionally, the method further includes: the internet of things service terminals in the digital simulcast system are organized into at least two terminal groups, wherein any terminal group comprises: the service terminals of the Internet of things under different base stations in the same simulcast region; all base stations in the digital simulcast system send down the same group of pull-up signaling; the group pull-up signaling is used for indicating the service terminals of the internet of things in the terminal group corresponding to the simulcast area to send uplink signals.
Optionally, before receiving the uplink signal, the method further includes: allocating time frequency resources to each simulcast region based on the time frequency resources for the service of the Internet of things; the time frequency resource comprises frequency and time slot.
Optionally, before receiving the uplink signal, the method further includes: and predetermining the binding relationship between the service terminal of the Internet of things and the affiliated simulcast region and time-frequency resources.
Optionally, the determining, in advance, a binding relationship between the service terminal of the internet of things and the simulcast area and the time-frequency resource to which the service terminal belongs includes: storing the used frequency and time slot of the simulcast region and the base station to which the business terminal of the internet of things belongs in advance; or, in the registration process of the service terminal of the internet of things, determining a base station and a simulcast area to which the service terminal of the internet of things belongs, and the used frequency and time slot; or the base station broadcasts the simulcast region to which the service terminal of the internet of things belongs and the allocated time-frequency resources so as to determine the binding relationship between the service terminal of the internet of things and the simulcast region and the time-frequency resources to which the service terminal of the internet of things belongs.
Optionally, the uplink signal reported by the service terminal of the internet of things in the simulcast area includes: and at least one of the uplink signal forwarded by the adjacent base station and reported in the allocated time slot, and the uplink signal received by the base station and reported in the allocated time slot by the bound service terminal of the internet of things.
A base station belongs to a digital simulcasting system; all base stations under the digital simulcasting system are divided into at least two simulcasting areas, wherein adjacent base stations belong to different simulcasting areas, and coverage areas of the base stations in the same simulcasting area are not overlapped so that different base stations in the same simulcasting area can simultaneously receive uplink signals without mutual interference; different simulcasting areas are configured with different time-frequency resources, so that the service terminals of the internet of things in different simulcasting areas do not simultaneously send uplink signals on the same frequency and the same time slot;
the base station comprises at least a first processor and a first memory; the first processor implements the method of any one of claims 1-6 by executing a program stored in the first memory.
Optionally, the internet of things service terminals in the digital simulcast system are organized into at least two terminal groups, where any terminal group includes: the service terminals of the Internet of things under different base stations in the same simulcast region; the processor is further configured to implement, by executing the program stored in the memory: sending down group pull-up signaling; the group pull-up signaling is used for indicating the service terminals of the internet of things in the terminal group corresponding to the simulcast area to send uplink signals.
A base station controller belongs to a digital simulcast system, and the digital simulcast system comprises the base station controller and the base station; the base station controller at least comprises: a second processor and a second memory; the second processor implements the following operations by executing the program stored in the second memory:
dividing all base stations under the digital simulcast system into at least two simulcast areas;
allocating time frequency resources to each simulcast region based on the time frequency resources for the service of the Internet of things; the time frequency resource comprises frequency and time slot.
Optionally, the second processor further implements the following operations by executing the program stored in the second memory: and compiling the Internet of things service terminals in the digital simulcast system into at least two terminal groups.
A digital simulcast system, comprising a plurality of the base stations, and the base station controller.
Therefore, in the embodiment of the invention, different time-frequency resources are configured in different simulcasting areas, so that the service terminals of the internet of things in different simulcasting areas do not simultaneously transmit uplink signals in the same frequency and the same time slot. And the adjacent base stations belong to different simulcasting areas, and the coverage areas of the base stations in the same simulcasting area are not overlapped, so that for a certain uplink signal received by one base station, the uplink signal is sent to the simulcasting area (namely the local simulcasting area) to which the base station belongs or is sent to a non-local simulcasting area, and the adjacent base stations belong to different simulcasting areas, so that the base station can forward the uplink signal reported by the service terminal of the internet of things in the non-local simulcasting area to the adjacent base stations.
And, when forwarding, only sending to the adjacent base station, not forwarding to all base stations. Meanwhile, the coverage areas of the base stations in the same simulcasting area are not overlapped, so that the uplink signal received by a certain base station (directly received or forwarded by an adjacent base station) is not overlapped with the uplink signal received by other base stations in the same simulcasting area. Or, an uplink signal transmitted by one terminal is finally received by the bonded base station, and is not transmitted to other base stations in the same simulcast area. Different base stations in the same simulcasting area can receive uplink signals at the same time without mutual interference.
Therefore, assuming that the whole digital simulcast system is divided into m simulcast areas, wherein N base stations are located in the simulcast area, uplink signals processed by the N base stations are different at the same frequency point and the same time, and after joint demodulation or judgment and selection, the N base stations can process uplink signals of at most N internet of things service terminals at the same time. Compared with the prior art which only processes 1 uplink signal, the channel utilization rate is improved.
Drawings
Fig. 1 is an exemplary structure of a digital simulcast system provided by an embodiment of the present invention;
fig. 2a is a schematic diagram of dividing coverage areas of all base stations into two simulcasting areas according to an embodiment of the present invention;
fig. 2b is a schematic diagram of an area covered by the simulcast area a according to an embodiment of the present invention;
fig. 2c is a schematic diagram of an area covered by the simulcast area B according to an embodiment of the present invention;
fig. 3a is a schematic diagram of dividing all base stations into three simulcasting areas according to an embodiment of the present invention;
fig. 3b-3d are schematic diagrams of areas covered by three simulcast areas according to an embodiment of the present invention;
fig. 4 is an exemplary flow of a data transmission method of the internet of things according to an embodiment of the present invention;
fig. 5 is another exemplary flow of a data transmission method of the internet of things according to the embodiment of the present invention;
fig. 6 is a schematic flow chart of a base station for transceiving signals according to an embodiment of the present invention;
fig. 7 is an exemplary structure of a base station according to an embodiment of the present invention;
fig. 8 is an exemplary structure of a base station controller according to an embodiment of the present invention;
fig. 9 is a schematic diagram of a possible hardware structure of a base station according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides an Internet of things data transmission method, a base station controller and a digital simulcasting system, so as to improve the channel utilization rate.
An example of the above digital simulcast system can be seen in fig. 1, which includes: a base station controller (also referred to as a simulcast base station controller) and a plurality of base stations (also referred to as clustered simulcast base stations).
In the invention, the base station controller can divide all base stations under the digital simulcast system into N (N is more than or equal to 2) simulcast areas, and allocate time frequency resources (including frequency and time slot) to each simulcast area based on the time frequency resources used for the service of the Internet of things.
Wherein the divided regions and the allocated time-frequency resources satisfy the following conditions:
the adjacent base stations belong to different simulcasting areas, and the coverage areas of the base stations in the same simulcasting area are not overlapped, so that the different base stations in the same simulcasting area can simultaneously receive uplink signals without mutual interference.
Meanwhile, different simulcasting areas are configured with different time-frequency resources, so that the internet of things service terminals in different simulcasting areas transmit uplink signals at the same frequency and the same time slot at different times.
In one example, for the chain coverage case, assuming that the overlapping coverage area of two adjacent base stations is smaller than the coverage radius of a single station and the terminal traffic is approximately uniformly distributed, referring to fig. 2a, all the base station coverage areas can be divided into two simulcast areas: simulcast zone a and simulcast zone B, wherein base stations BS1, BS3 and BS5 belong to simulcast zone B, and base stations BS2 and BS4 belong to simulcast zone a.
Fig. 2b shows the area covered by simulcast area a, and it can be seen that the coverage areas of the base stations in simulcast area a do not overlap. Similarly, fig. 2c shows the coverage area of the simulcast area B, and the coverage areas of the base stations in the simulcast area B do not overlap.
In the uplink and downlink aspect, a downlink same-frequency broadcasting non-partition (downlink interference prevention) mode can be adopted, and an uplink same-frequency partition (different broadcasting areas are configured with different time-frequency resources so that service terminals of the internet of things in different broadcasting areas are on the same frequency and the same time slot and do not uplink at the same time) mode is adopted to deal with the situations that the uplink and downlink of the data of the internet of things are asymmetric and the uplink data amount is large.
In general, the frequency band of the digital simulcast system is 12.5kHz, each frequency band has 2 time slots, and 2 paths of traffic can be simultaneously carried.
In the following, different situations of time-frequency resources of the internet of things service are taken as examples to introduce how to divide simulcast areas and allocate the time-frequency resources.
When only one pair of frequency points (for example, frequency point f1 is used for uplink and frequency point f2 is used for downlink) is available for the service of the internet of things in the whole digital simulcast system:
in a first case, it is assumed that there are two slots 0 and 1, where both time frequencies may be used for services of the internet of things (i.e., a single-frequency-point and dual-slot case), each base station may be divided into a simulcasting area a and a simulcasting area B, a slot0 is allocated to the simulcasting area a, a slot1 is allocated to the simulcasting area B, and vice versa;
in case two, assuming that there are two slots 0 and 1, only slot0 or slot1 may be used for the service of the internet of things (i.e., the case of a single frequency point and a single slot), and the other slot is used for the voice service, each base station may be divided into a simulcast area a and a simulcast area B, and slot0 or slot1 is allocated to area a and area B every other multiframe; for example, slot0 or slot1 of multiframe 1, 3, 5, 7 … … is allocated to simulcast region a, and slot0 or slot1 of multiframe 2, 4, 6, 8 … … is allocated to simulcast region B.
Alternatively, the first half of slot0 or slot1 may be allocated to one of the simulcast zones and the second half allocated to the other simulcast zone.
Secondly, when the Internet of things service has double frequency points available:
assuming that two pairs of frequency bins (f1 f2) and (f3 f4) are available, each base station may be divided to belong to simulcast area a and simulcast area B.
A pair of frequency points (e.g., (f1 f2)) may be allocated to the base station in the simulcast area a, and if one of the two timeslots (e.g., slot0) is occupied by voice traffic, the other timeslot (e.g., slot1) may be allocated to the internet of things traffic in the simulcast area a.
Another pair of frequency points (e.g., (f3 f4)) is allocated to the base station in the simulcast zone B, and if one of the two time slots (e.g., slot0) is occupied by voice traffic, another time slot (e.g., slot1) can be allocated to the internet of things traffic in the simulcast zone B.
Because there is no overlapping coverage area between the base stations in each simulcast area, the base stations under two frequency points do not interfere with each other.
Thirdly, when the internet of things service has multiple frequency points available:
for example: and the time slot with 3 frequency points can be used for data service of the Internet of things, so that each base station can be divided into 3 simulcast areas, and a terminal in each area resides in one frequency point.
The service terminals of the internet of things can be uniformly distributed on all available frequency points as much as possible according to the service volume;
in another example, for the case of planar coverage. The base stations may be divided into at least 3 simulcast areas, provided that the overlapping coverage area between adjacent base stations is less than the coverage radius of each base station.
Referring to fig. 3a, all base stations can be divided into three simulcasting areas, wherein the base stations in the solid line coverage area belong to the same simulcasting area, the base stations in the dot-dash line coverage area belong to the same simulcasting area, and the base stations in the dotted line coverage area belong to the same simulcasting area.
Fig. 3b-3d show the areas covered by three simulcast areas, and it can be seen that the coverage areas of base stations in the same simulcast area do not overlap.
Aiming at different time frequency resource conditions of the digital simulcast system, the following distribution can be carried out:
firstly, the whole digital simulcast system only has one pair of frequency points (single frequency point) which can be used for the service of the internet of things:
in a case one, it is assumed that there are two slots 0 and 1, both of which may be used for services of the internet of things, each base station may be divided into 3 simulcast areas (referred to as areas 1-3 for short), and it is assumed that, in areas 1-3, the traffic volume or the number of terminals in area 1 is the largest, slot0 may be allocated to area 1 with the largest traffic volume, and slot1 is allocated to area 2 and area 3 every other multiframe, or the first half of slot1 is allocated to area 2 and the second half is allocated to area 3, and vice versa;
in case two, it is assumed that there are two slots slot0 and slot1, only slot0 or slot1 may be used for the service of the internet of things, each base station may be divided into 3 simulcast regions (referred to as regions 1-3), and slot0 or slot1 is allocated to one region every 2 multiframes; for example, slot0 or slot1 of multiframe 1, 4, 7 … … is allocated to region 1, slot0 or slot1 of multiframe 2, 5, 8 … … is allocated to region 2, and slot0 or slot1 of multiframe 3, 6, 9 … … is allocated to region 3.
In addition, if different simulcast areas need to work simultaneously on the same frequency point, different Color codes (Color codes) are allocated to the different simulcast areas as much as possible, and the Color codes can distinguish base stations with the same frequency so as to prevent the problem of area confusion caused by terminal misinformation.
Specifically, the downlink channel carries a color code in the downlink broadcast signaling to notify the terminal.
Secondly, the service of the Internet of things has dual frequency points available:
one pair of bins may be assigned to the region with the largest traffic (the available timeslots may be allocated to both regions), and the other pair of bins may be assigned to the remaining two regions (timeslot allocation may refer to the case of single bin single timeslot or single bin double timeslot).
Thirdly, the internet of things service has multiple frequency points available:
the simulcast region is divided by the number of visually available frequency points. And will not be described in detail herein.
Different time-frequency resources can also be considered as different service channels, and the corresponding relation between a certain simulcast area and a service channel can be dispersed at a plurality of frequency points. For example, 4 traffic channels may be allocated for a certain simulcast region: the time slot0 of the first pair of frequency points, the time slot0 of the second pair of frequency points, the time slot1 of the second pair of frequency points and the time slot1 of the third pair of frequency points.
Certainly, the service terminal of the internet of things needs to know the simulcast area and the base station to which the service terminal belongs, the frequency point where the service terminal resides and the available time slot.
Therefore, the fixed internet of things service terminal in the coverage scope of the whole digital simulcasting system needs to bind the home area/base station and the time slot in advance, and the implementation modes include but are not limited to the following:
1) the method comprises the steps of storing the area and the base station which the service terminal of the Internet of things belongs to in advance, and storing the usable frequency and time slot of the service terminal of the Internet of things.
2) In the registration process of the service terminal of the Internet of things, a base station and a simulcasting area to which the service terminal of the Internet of things belongs, and used frequency and time slots are determined.
After any terminal is started, the terminal must be registered to normally work. And after the service terminal of the Internet of things is started, a registration message is sent to the air interface.
The base station side may have multiple base stations receiving the same registration message, the base station controller may select a base station with better received signal quality, and the simulcast area to which the base station belongs is the home area of the terminal. The selected base station registers the terminal and informs the terminal of the simulcast area to which the terminal belongs and available frequencies and time slots.
3) And the base station broadcasts the attribution area/base station of the service terminal of the Internet of things and the allocated time-frequency resources.
For the service terminal of the internet of things, it needs to camp on the allocated frequency point and send data at the allocated time, although the random reporting of data services by the terminal in a single station still generates collision, the terminal reporting message in the next area will not be affected, because different simulcasting areas use different frequencies or use different time slots under the same frequency.
Fig. 4 shows an exemplary flow of a data transmission method of the internet of things, which is performed by cooperative cooperation of the devices in the digital simulcast system, and includes:
s1: a base station in a digital simulcast system receives an uplink signal.
Any uplink signal received by the base station may be an uplink signal reported by a non-local simulcast regional internet of things service terminal, and may also be an uplink signal reported by a local simulcast regional internet of things service terminal.
S2: and the base station forwards the uplink signal reported by the service terminal of the internet of things on the allocated time slot of the non-local simulcast area to the adjacent base station.
For example, referring to fig. 2a, assume that the internet of things service terminal node3 is in the overlapping coverage area of BS1 and BS 2. When node3 transmits an uplink signal, both BS1 and BS2 may receive the uplink signal. node3 is not a binding terminal for base station BS1 and its assigned time slot is not a time slot used by the simulcast zone in which base station BS1 is located. Therefore, the uplink signal sent by the node3 and received by the base station BS1 is an uplink signal reported by the service terminal of the internet of things on the allocated time slot of the non-local simulcast area.
For digital simulcast systems the smaller the overlap coverage area the better, and therefore the channel quality at node3 may not be very good, the base station BS1 may participate in receiving and transmitting the received uplink signals to the neighbouring base stations BS 2.
If taking the BS2 as an example, when receiving the uplink signal reported by the service terminal of the internet of things in the allocated timeslot of the non-local simulcast area, the BS2 may forward the uplink signal to the neighboring base stations BS1 and BS 3.
S3: and the base station performs joint demodulation or judgment and selection on the uplink signal reported by the service terminal of the internet of things in the simulcast area.
The uplink signal reported by the business terminal of the internet of things in the simulcast area comprises the following components: and at least one of an uplink signal reported by the service terminal of the internet of things in the simulcast region and an uplink signal forwarded by an adjacent base station on the allocated time slot of the simulcast region.
Steps S2 and S3 may implement: the uplink signal reported on the allocated time slot of the non-local simulcast area is transferred to the adjacent station to improve the reporting success rate of the overlapped coverage area; the uplink signal reported by the service terminal of the internet of things in the simulcast area can be jointly demodulated or judged and selected with the uplink signal transmitted by the adjacent station.
S4: and the base station discards an uplink signal reported by the service terminal of the internet of things in the non-local simulcast area on the allocated time slot of the local simulcast area.
It can be seen that, in the embodiment of the present invention, for a certain uplink signal received by a base station, the certain uplink signal is sent to either a simulcast zone (i.e. the local simulcast zone) to which the base station itself belongs or a non-local simulcast zone, and an adjacent base station belongs to a different simulcast zone, so that the base station may forward the uplink signal in the non-local simulcast zone to the adjacent base station.
And, when forwarding, only sending to the adjacent base station, not forwarding to all base stations. Meanwhile, the coverage areas of the base stations in the same simulcast area are not overlapped, so that the uplink signal received by a certain base station (directly received or forwarded by an adjacent base station) is not overlapped with the uplink signal received by other base stations in the same simulcast area. Or, an uplink signal transmitted by one terminal is finally received by the bonded base station, and is not transmitted to other base stations in the same simulcast area.
Therefore, assuming that the whole digital simulcast system is divided into m (m is not less than 2) simulcast areas, wherein N base stations are arranged in the simulcast area, and uplink signals processed by the N base stations are different at the same frequency point and the same time. Compared with the prior art which only processes 1 uplink signal, the channel utilization rate is improved.
In addition, it should be noted that, after performing joint demodulation or decision selection, the uplink signal (internet data) uploaded by the service terminal of the internet of things is not forwarded to all other base stations, but is transmitted to the core network through the base station controller.
Of course, if the base station only receives the uplink signal reported by the service terminal of the internet of things in a certain simulcast area, the uplink signal can be directly transmitted to the core network through the base station controller, and the judgment and selection or the joint demodulation are not performed any more.
For voice service, the existing processing mode can be adopted, voice signals are sent on the uplink frequency point used for the voice service at the voice terminal, the system judges and selects the uplink multiple voice signals, and all other base stations can forward the judged and selected signals.
In addition, it should be noted that the coverage areas of the base stations in the same simulcast area are not overlapped, so that the mutual interference between the terminals in the same simulcast area can be eliminated; different simulcasting areas are on the same frequency and the same time slot and do not uplink at the same time, so that mutual interference among terminals in different simulcasting areas can be eliminated.
The channel utilization ratio actually refers to the ratio of the time of successful transmission to the total channel time, and the more the terminals interfere with each other, the information at the times of mutual interference cannot be successfully transmitted, that is, anyone does not successfully utilize the times. And possible interference is eliminated, and the channel utilization rate is indirectly improved.
For data services (such as periodic reporting) reported in advance with a predetermined time, the embodiment can also greatly improve the channel utilization rate.
In other embodiments of the present invention, in order to save downlink channel signaling, referring to fig. 5, the data transmission method for the internet of things exemplarily includes the following steps:
s51: the method comprises the steps that the Internet of things service terminals in the digital simulcast system are organized into at least two terminal groups;
wherein, any terminal group includes: and the service terminals of the Internet of things under different base stations in the same simulcasting area.
For example, if the base stations in the digital simulcasting system are divided into N simulcasting areas, the service terminals of the internet of things in the N simulcasting areas may belong to the same terminal group.
Step S51 may illustratively be performed by a base station controller. Alternatively, it may be configured in advance.
Specifically, the group number may be configured in advance before the service terminal of the internet of things leaves the factory. The base station in the digital simulcast system may also be preconfigured with the group number of the supported terminals.
Or, when the service terminal of the internet of things registers, the group number supported by the service terminal of the internet of things is provided, and the base station stores the group number.
S52: each base station issues the same set of pull-up signaling.
And the group pull-up signaling is used for indicating the service terminals of the internet of things in the terminal group corresponding to the simulcast area to send uplink signals.
Because many base stations share the same downlink frequency point, issuing the same group of pull-up signaling is very beneficial to saving channel resources.
Because the coverage areas of the base stations in the same simulcasting area are not overlapped, the terminals under different base stations in the same area can simultaneously transmit different messages without interfering with each other.
S53: and a base station in the digital simulcast system receives an uplink signal reported by the service terminal of the Internet of things.
Any received uplink signal may be an uplink signal reported by a non-local simulcast regional internet of things service terminal, and may also be an uplink signal reported by a local simulcast regional internet of things service terminal.
S54: and the base station forwards the uplink signal reported by the service terminal of the internet of things on the allocated time slot of the non-local simulcast area to the adjacent base station.
More specifically, referring to fig. 6, the base station performs the following steps:
step a: judging whether the current time slot is the distributed time slot of the simulcasting area or not aiming at the received uplink signal, if so, entering the step b, otherwise, entering the step d;
step b: judging whether a Color Code (CC) carried by an uplink signal is the color code of the simulcast region, if so, entering a step c, otherwise, entering a step e;
step c: judging whether an uplink signal (message) forwarded by an adjacent base station exists, if so, entering the step S55, otherwise, ending;
that is, in this embodiment, the uplink signal reported by the service terminal of the internet of things in the simulcast area may specifically include: and at least one of the uplink signals forwarded by the adjacent base stations and the uplink signals received by the base stations and reported by the service terminal of the binding internet of things (whether the binding is determined according to the CC) in the allocated time slot.
In another example, the uplink signal forwarded by the neighboring base station may further determine whether the uplink signal is a color code of the simulcast area according to the CC carried by the uplink signal, and if not, the uplink signal forwarded by the neighboring base station may be determined not to be transmitted by the terminal in the simulcast area and may be discarded. Of course, if so, the uplink signals forwarded by the neighboring base stations may be made to participate in joint reception or traitoring.
Step d: and forwarding the uplink signal to the adjacent base station.
Step e: the upstream signal is discarded.
S55: and the base station performs joint demodulation or judgment and selection on the uplink signal reported by the service terminal of the internet of things in the simulcast area.
In summary, the technical solution provided by the embodiment of the present invention solves the problems of low channel utilization rate and small system capacity when the simulcast system transmits the data service of the fixed object networking terminal.
In addition, when the voice service and the internet of things service are provided by the same simulcast system, the technical scheme provided by the embodiment of the invention does not influence the transmission of simulcast voice, and can also transmit the internet of things data service. The problem of channel utilization rate when frequency points are few can be solved, and system capacity is improved.
On the premise of not increasing frequency points, the technical scheme provided by the embodiment of the invention can still transmit the data service of the Internet of things at higher efficiency, improves the channel utilization rate, and obviously improves the channel utilization rate under the condition that the number of base stations in the same-frequency simulcast area is more.
Fig. 7 shows an exemplary structure of the base station, which includes:
a communication unit 1 for:
receiving an uplink signal reported by a business terminal of the Internet of things;
forwarding an uplink signal reported by an internet of things service terminal on an allocated time slot of a non-local simulcasting area to an adjacent base station;
a processing unit 2 for:
performing joint demodulation or judgment and selection on an uplink signal reported by the service terminal of the internet of things in the simulcast region; the uplink signal reported by the service terminal of the internet of things in the simulcast area comprises: at least one of an uplink signal reported by an internet of things service terminal in the simulcast region and an uplink signal forwarded by an adjacent base station on an allocated time slot of the simulcast region;
and discarding the uplink signal reported by the service terminal of the internet of things in the non-local simulcast area on the allocated time slot of the local simulcast area.
In other embodiments, the internet of things service terminals in the digital simulcast system are organized into at least two terminal groups, wherein any terminal group includes: the service terminals of the Internet of things under different base stations in the same simulcast region;
the communication unit 1 may also be adapted to: sending down group pull-up signaling; the group pull-up signaling is used for indicating the internet of things service terminals in the terminal group corresponding to the simulcast area to send uplink signals.
Fig. 8 shows an exemplary structure of the above base station controller, including:
a dividing unit 3 for: dividing all base stations under the digital simulcast system into at least two simulcast areas;
an allocation unit 4 for: allocating time frequency resources to each simulcast region based on the time frequency resources for the service of the Internet of things; the time frequency resource comprises frequency and time slot.
For a detailed description, refer to the above description, and are not repeated herein.
In another embodiment of the present invention, referring to fig. 8, the base station controller may further include a grouping unit 5, configured to group the internet of things service terminals in the digital simulcast system into at least two terminal groups.
In other embodiments of the present invention, the base station may further include a binding unit, configured to determine a binding relationship between the service terminal of the internet of things and the simulcast area and the time-frequency resource to which the service terminal of the internet of things belongs, and broadcast the simulcast area to which the service terminal of the internet of things belongs and the allocated time-frequency resource.
Or, the area and the base station to which the service terminal belongs, and the available frequency and time slot may be stored in the service terminal of the internet of things in advance.
Fig. 9 shows a schematic diagram of a possible hardware structure of the base station in the above embodiment, which includes: a bus, a (first) processor 1, a (first) memory 2, a communication interface 3, an input device 4 and an output device 5. The processor 1, the memory 2, the communication interface 3, the input device 4, and the output device 5 are connected to each other by a bus. Wherein:
a bus may include a path that transfers information between components of a computer system.
The Processor 1 may be a general-purpose Processor, such as a general-purpose Central Processing Unit (CPU), a Network Processor (NP), a microprocessor, etc., or an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program according to the present invention. But also a Digital Signal Processor (DSP), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components.
The memory 2 stores programs or scripts for executing the technical solution of the present invention, and may also store an operating system and other key services. In particular, the program may include program code including computer operating instructions. Scripts are typically saved as text (e.g., ASCII) and are interpreted or compiled only when called.
The input device 4 may include means for receiving data and information input by a user, such as a keyboard, mouse, camera, voice input means, touch screen, etc.
The output device 5 may comprise means allowing output of information to a user, such as a display screen, a loudspeaker, etc.
The communication interface 3 may comprise means for using any transceiver or the like for communicating with other devices or communication networks, such as ethernet, Radio Access Network (RAN), Wireless Local Area Network (WLAN) or the like.
The processor 1 may implement the data transmission method of the internet of things provided by the above embodiment by executing the program stored in the memory 2 and calling other devices.
The functions of the units of the base station can be realized by the processor 1 executing the program stored in the memory 2 and calling other devices.
The invention also claims a base station controller, which at least comprises: a second processor and a second memory; the second processor implements the following operations by executing the program stored in the second memory:
dividing all base stations under a digital simulcasting system into at least two simulcasting areas;
allocating time frequency resources to each simulcast region based on the time frequency resources for the service of the Internet of things; the time-frequency resources include frequencies and time slots.
In other embodiments of the present invention, the second processor may further execute the program stored in the second memory to implement the following operations:
and the Internet of things service terminals in the digital simulcast system are organized into at least two terminal groups.
The hardware structure of the base station controller is similar to that of the base station, and is not described herein.
Those of skill would further appreciate that the various illustrative components and model steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the technical solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or model described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, WD-ROM, or any other form of storage medium known in the art.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (11)
1. A data transmission method of the Internet of things is characterized by being based on a digital simulcast system; all base stations under the digital simulcasting system are divided into at least two simulcasting areas, wherein adjacent base stations belong to different simulcasting areas, and coverage areas of the base stations in the same simulcasting area are not overlapped so that different base stations in the same simulcasting area can simultaneously receive uplink signals without mutual interference; different simulcasting areas are configured with different time-frequency resources, so that the service terminals of the internet of things in different simulcasting areas do not simultaneously send uplink signals on the same frequency and the same time slot;
the method comprises the following steps:
a base station receives an uplink signal; the uplink signal includes: at least one of an uplink signal reported by the service terminal of the internet of things and an uplink signal forwarded by an adjacent base station;
the base station forwards an uplink signal reported by the service terminal of the internet of things on the allocated time slot of the non-local simulcast area to an adjacent base station;
the base station discards an uplink signal reported by an Internet of things service terminal in a non-local simulcast region on an allocated time slot of the local simulcast region;
the base station carries out joint demodulation or judgment and selection on the uplink signal reported by the service terminal of the internet of things in the simulcast region; the uplink signal reported by the service terminal of the internet of things in the simulcast area comprises: and at least one of an uplink signal reported by the service terminal of the internet of things in the simulcast region and an uplink signal forwarded by the adjacent base station on the allocated time slot of the simulcast region.
2. The method of claim 1, further comprising:
the internet of things service terminals in the digital simulcast system are organized into at least two terminal groups, wherein any terminal group comprises: the service terminals of the Internet of things under different base stations in the same simulcast region;
all base stations in the digital simulcast system send down the same group of pull-up signaling; the group pull-up signaling is used for indicating the internet of things service terminals in the terminal group corresponding to the simulcast area to send uplink signals.
3. The method of claim 1 or 2, wherein prior to receiving the uplink signal, further comprising:
allocating time frequency resources to each simulcast region based on the time frequency resources for the service of the Internet of things; the time frequency resource comprises frequency and time slot.
4. The method of claim 1 or 2, further comprising, prior to receiving the uplink signal:
and predetermining the binding relationship between the service terminal of the Internet of things and the affiliated simulcast region and time-frequency resources.
5. The method of claim 4, wherein the step of predetermining the binding relationship between the service terminal of the Internet of things and the simulcast region and the time-frequency resource comprises the steps of:
storing the used frequency and time slot of the simulcast region and the base station to which the business terminal of the internet of things belongs in advance;
or,
in the registration process of the service terminal of the Internet of things, determining a base station and a simulcasting area to which the service terminal of the Internet of things belongs, and the used frequency and time slot;
or,
and the base station broadcasts the simulcast region to which the service terminal of the Internet of things belongs and the distributed time-frequency resources so as to determine the binding relationship between the service terminal of the Internet of things and the simulcast region and the time-frequency resources to which the service terminal of the Internet of things belongs.
6. The method of claim 4,
the uplink signal reported by the service terminal of the internet of things in the simulcast area comprises:
and at least one of the uplink signal forwarded by the adjacent base station and reported in the allocated time slot, and the uplink signal received by the base station and reported in the allocated time slot by the bound service terminal of the internet of things.
7. A base station, characterized in that it belongs to a digital simulcast system; all base stations under the digital simulcasting system are divided into at least two simulcasting areas, wherein adjacent base stations belong to different simulcasting areas, and coverage areas of the base stations in the same simulcasting area are not overlapped so that different base stations in the same simulcasting area can simultaneously receive uplink signals without mutual interference; different simulcasting areas are configured with different time-frequency resources, so that the service terminals of the internet of things in different simulcasting areas do not simultaneously send uplink signals on the same frequency and the same time slot;
the base station comprises at least a first processor and a first memory; the first processor implements the method of any one of claims 1-6 by executing a program stored in the first memory.
8. The base station of claim 7,
the internet of things service terminals in the digital simulcast system are organized into at least two terminal groups, wherein any terminal group comprises: the service terminals of the Internet of things under different base stations in the same simulcast region;
the processor is further configured to implement, by executing the program stored in the memory:
sending down group pull-up signaling; the group pull-up signaling is used for indicating the service terminals of the internet of things in the terminal group corresponding to the simulcast area to send uplink signals.
9. A base station controller belonging to a digital simulcast system comprising said base station controller and a base station according to claim 7 or 8;
the base station controller at least comprises: a second processor and a second memory; the second processor implements the following operations by executing the program stored in the second memory:
dividing all base stations under the digital simulcast system into at least two simulcast areas;
allocating time frequency resources to each simulcast region based on the time frequency resources for the service of the Internet of things; the time frequency resource comprises frequency and time slot.
10. The base station controller of claim 9, said second processor further operative by executing a program stored in said second memory to:
and compiling the Internet of things service terminals in the digital simulcast system into at least two terminal groups.
11. A digital simulcast system comprising a plurality of base stations according to claim 7 or 8 and a base station controller according to claim 9 or 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011564577.7A CN112738896B (en) | 2020-12-25 | 2020-12-25 | Internet of things data transmission method, base station controller and digital simulcasting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011564577.7A CN112738896B (en) | 2020-12-25 | 2020-12-25 | Internet of things data transmission method, base station controller and digital simulcasting system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112738896A CN112738896A (en) | 2021-04-30 |
| CN112738896B true CN112738896B (en) | 2022-07-12 |
Family
ID=75616269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011564577.7A Active CN112738896B (en) | 2020-12-25 | 2020-12-25 | Internet of things data transmission method, base station controller and digital simulcasting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112738896B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102340776A (en) * | 2010-07-20 | 2012-02-01 | 中兴通讯股份有限公司 | Time frequency resource classification method and base station |
| CN102932909A (en) * | 2012-10-08 | 2013-02-13 | 科立讯通信股份有限公司 | Digital common frequency broadcasting system and wireless judgment and synchronization method |
| WO2016127405A1 (en) * | 2015-02-13 | 2016-08-18 | 华为技术有限公司 | Data transmission method and device |
| EP3073706A1 (en) * | 2015-03-25 | 2016-09-28 | Comcast Cable Communications, LLC | Distributed content delivery for moving devices |
| CN107295527A (en) * | 2016-03-31 | 2017-10-24 | 中国电信股份有限公司 | Co-channel interference protection band division methods, apparatus and system |
| CN208590121U (en) * | 2018-07-18 | 2019-03-08 | 海南宝通实业公司 | A kind of Digital Clustering common-frequency broadcasting system |
| CN110769427A (en) * | 2018-07-27 | 2020-02-07 | 哈尔滨海能达科技有限公司 | Method, device and storage medium for dynamically allocating channel resources of simulcast system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8284826B2 (en) * | 2007-11-02 | 2012-10-09 | Qualcomm Incorporated | Synchronization of satellite and terrestrial broadcast ODFM signals |
-
2020
- 2020-12-25 CN CN202011564577.7A patent/CN112738896B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102340776A (en) * | 2010-07-20 | 2012-02-01 | 中兴通讯股份有限公司 | Time frequency resource classification method and base station |
| CN102932909A (en) * | 2012-10-08 | 2013-02-13 | 科立讯通信股份有限公司 | Digital common frequency broadcasting system and wireless judgment and synchronization method |
| WO2016127405A1 (en) * | 2015-02-13 | 2016-08-18 | 华为技术有限公司 | Data transmission method and device |
| EP3073706A1 (en) * | 2015-03-25 | 2016-09-28 | Comcast Cable Communications, LLC | Distributed content delivery for moving devices |
| CN107295527A (en) * | 2016-03-31 | 2017-10-24 | 中国电信股份有限公司 | Co-channel interference protection band division methods, apparatus and system |
| CN208590121U (en) * | 2018-07-18 | 2019-03-08 | 海南宝通实业公司 | A kind of Digital Clustering common-frequency broadcasting system |
| CN110769427A (en) * | 2018-07-27 | 2020-02-07 | 哈尔滨海能达科技有限公司 | Method, device and storage medium for dynamically allocating channel resources of simulcast system |
Non-Patent Citations (2)
| Title |
|---|
| Ananta Pandey.CTB-MAC: Cluster-Based TDMA Broadcast MAC Protocol for Mobile Ad-Hoc Network.《2010 5th International Conference on Future Information Technology》.2010, * |
| 刘毅等.高话务场景分区错频的降噪保障方法研究及实践.《移动通信》.2018,(第03期), * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112738896A (en) | 2021-04-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10708925B2 (en) | Resource allocation method and device | |
| CN108353403B (en) | Method for D2D communication and D2D device | |
| US10624115B2 (en) | Radio resource scheduling method, device and system | |
| CN100444679C (en) | Channel distributing method in mixed network | |
| CN101123789B (en) | Method and system for wireless resource control and allocation | |
| JPWO2013179472A1 (en) | RADIO COMMUNICATION SYSTEM, RADIO BASE STATION DEVICE, TERMINAL DEVICE, AND RADIO RESOURCE ALLOCATION METHOD | |
| US10932228B2 (en) | Communication method and terminal | |
| CN105338513A (en) | Device to device (D2D) service processing method and device | |
| EP2091165B1 (en) | Method for reducing interference between adjacent sectors, and base station apparatus | |
| CN111557112A (en) | Method, apparatus and system for device-to-device communication | |
| CN112887074B (en) | Information sending method, device, terminal, access network equipment and system | |
| CN1905398B (en) | Broadcasting/multicasting service transmitting method for TDD system | |
| CN102056086A (en) | Method, terminal and system for receiving multicast broadcasting service | |
| CN108401245B (en) | D2D-oriented unlicensed band intra-cluster data sharing method | |
| CN112738896B (en) | Internet of things data transmission method, base station controller and digital simulcasting system | |
| CN115065987B (en) | Idle channel interception method, device and equipment | |
| KR20220034824A (en) | Method, apparatus and storage medium for indicating channel state in unlicensed spectrum | |
| CN114928825A (en) | Internet of vehicles HARQ information feedback method and equipment | |
| CN116156653A (en) | Communication method and communication device | |
| CN115767746A (en) | Configuration method, configuration determining method and device, computer readable storage medium, network device and terminal device | |
| EP3576474B1 (en) | Information transmission method and device, information processing method and device | |
| WO2021056222A1 (en) | Resource scheduling method and apparatus | |
| US20070123170A1 (en) | Method and apparatus for interference mitigation for multi-radio systems in wireless networks | |
| CN105634713A (en) | Full-duplex wireless communication method based on virtual base station | |
| KR20150007236A (en) | Apparatus and method for deployment monitor on LTE D2D communications |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |