CN110234151B - Terminal access method and device - Google Patents
Terminal access method and device Download PDFInfo
- Publication number
- CN110234151B CN110234151B CN201910367960.4A CN201910367960A CN110234151B CN 110234151 B CN110234151 B CN 110234151B CN 201910367960 A CN201910367960 A CN 201910367960A CN 110234151 B CN110234151 B CN 110234151B
- Authority
- CN
- China
- Prior art keywords
- base station
- terminal
- access
- reference signal
- signal received
- 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
- 238000004891 communication Methods 0.000 claims abstract description 10
- 238000007667 floating Methods 0.000 claims description 19
- 102100029651 Arginine/serine-rich protein 1 Human genes 0.000 claims description 13
- 101000728589 Homo sapiens Arginine/serine-rich protein 1 Proteins 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 description 10
- 230000006870 function Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 4
- 238000004590 computer program Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000005562 fading Methods 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- GVVPGTZRZFNKDS-JXMROGBWSA-N geranyl diphosphate Chemical compound CC(C)=CCC\C(C)=C\CO[P@](O)(=O)OP(O)(O)=O GVVPGTZRZFNKDS-JXMROGBWSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Computer Security & Cryptography (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The embodiment of the invention provides a terminal access method and a terminal access device, relates to the field of communication, and can judge whether coverage enhancement level needs to be improved or not by combining network conditions so as to further improve user experience. The method comprises the following steps: the terminal determines a coverage enhancement grade; selecting a corresponding narrowband physical random access channel NPRACH according to the coverage enhancement grade; determining the maximum access attempt times set for the coverage enhancement level by the base station according to the NPRACH; attempting access to a base station on the NPRACH; if the number of times of trying to access the base station on the NPRACH is equal to the maximum number of times of trying to access the base station, acquiring the reference receiving power of the terminal and the preset threshold value of the reference signal receiving power of the base station; and determining that the reference signal receiving power of the terminal is smaller than a preset threshold value, and after the coverage enhancement grade is upgraded, the terminal retries to access the base station. The embodiment of the application is applied to the access of the terminal to the base station.
Description
Technical Field
The embodiment of the invention relates to the field of communication, in particular to a terminal access method and device.
Background
The narrowband internet of things (NB-Iot) based on the cellular network is an internet of things technology based on the third generation partnership project (3 GPP) Long Term Evolution (LTE) standard protocol evolution, and is mainly oriented to an internet of things application scenario with medium-low rate, deep coverage, low power consumption and large connection. The NB-Iot utilizes technologies such as time domain repeated transmission, the maximum gain of 15dB can be obtained compared with the coverage of an ordinary user in the coverage depth, and therefore deep coverage is supported.
The 3GPP specifies that NB-IoT has a 20dB improvement in coverage compared to General Packet Radio Service (GPRS), and supports three coverage enhancement levels (CE levels), where the Maximum Coupling Loss (MCL) is 144dB, 154dB, and 164dB, respectively, where the coverage enhancement level CE0 can resist 144dB signal fading, the coverage enhancement level CE1 can resist 154dB signal fading, the coverage enhancement level CE2 can resist 164dB signal fading, CE0 corresponds to normal coverage, i.e., the channel condition is the best, and CE2 corresponds to the condition with the worst channel condition, and considers that the coverage may be very poor. Different coverage enhancement levels mainly affect the number of times of message retransmission, and if the channel condition is poor, the message needs to be retransmitted for many times.
In the prior art, a User Equipment (UE) directly climbs to a CE1 for random access when the CE0 random access fails, and directly climbs to the CE2 for random access when the CE1 random access fails, without requirements for a network, but in actual situations, the network has differences, and once the network quality is not good, the number of times of the terminal access failure is too many, the terminal directly climbs to the CE2 for random access, which easily causes the network load to be too high, and causes subsequent service blocking to cause sudden user experience drop.
Disclosure of Invention
Embodiments of the present invention provide a terminal access method and apparatus, which can determine whether a coverage enhancement level needs to be improved by combining with a network condition, so as to further improve user experience.
In a first aspect, a terminal access method is provided, including the following steps: the terminal determines a coverage enhancement grade; selecting a corresponding narrowband physical random access channel NPRACH according to the coverage enhancement grade; determining the maximum access attempt times set for the coverage enhancement level by the base station according to the NPRACH; attempting access to a base station on the NPRACH; if the number of times of trying to access the base station on the NPRACH is equal to the maximum number of times of trying to access the base station, acquiring the reference receiving power of the terminal and the preset threshold value of the reference signal receiving power of the base station; and determining that the reference signal receiving power of the terminal is smaller than a preset threshold value, and after the coverage enhancement grade is upgraded, the terminal retries to access the base station.
In the scheme, the terminal determines the coverage enhancement level; selecting a corresponding narrowband physical random access channel NPRACH according to the coverage enhancement grade; determining the maximum access attempt times set for the coverage enhancement level by the base station according to the NPRACH; attempting access to a base station on the NPRACH; if the number of times of trying to access the base station on the NPRACH is equal to the maximum number of times of trying to access the base station, acquiring the reference receiving power of the terminal and the preset threshold value of the reference signal receiving power of the base station; and determining that the reference signal receiving power of the terminal is smaller than a preset threshold value, and after the coverage enhancement grade is upgraded, the terminal retries to access the base station. According to the method and the device, whether the terminal can be upgraded in the coverage enhancement level is determined by determining that the number of times that the terminal attempts to access the base station is equal to the maximum number of times that the base station sets, and then determining whether the terminal can be upgraded in the coverage enhancement level according to the preset threshold that the reference signal receiving power of the terminal is smaller than the reference signal receiving power of the base station, so that the problem that once the number of times that the terminal attempts to access the base station is equal to the maximum number of times that the base station sets, the coverage enhancement level is directly upgraded in the prior art, network load is too high, and subsequent service blocking is caused to.
In a second aspect, a terminal access apparatus includes: the determining module is used for determining the coverage enhancement grade by the terminal; the selection module is used for selecting the corresponding narrowband physical random access channel NPRACH according to the coverage enhancement grade determined by the determination module; the acquisition module is used for determining the maximum access attempt times set for the coverage enhancement grade by the base station according to the NPRACH selected by the selection module; an access module, configured to attempt to access the base station on the NPRACH selected by the selection module; the obtaining module is further used for obtaining the reference receiving power of the terminal and the predetermined threshold value of the reference signal receiving power of the base station if the number of times that the access module attempts to access the base station on the NPRACH is determined to be equal to the maximum number of times of access attempts; and the processing module is used for determining that the reference signal receiving power of the terminal acquired by the acquisition module is smaller than a preset threshold value, and retrying to access the base station after the terminal carries out coverage enhancement grade upgrading.
In a third aspect, a terminal access device is provided, which is used for a terminal or a chip on the terminal, and includes a communication interface, a processor, a memory, and a bus; the memory is used for storing computer execution instructions, the processor is connected with the memory through the bus, and when the terminal access device runs, the processor executes the computer execution instructions stored in the memory so as to enable the terminal access device to execute the terminal access method.
In a fourth aspect, there is provided a computer storage medium comprising instructions which, when run on a computer, cause the computer to perform a terminal access method as described above.
In a fifth aspect, a computer program product is provided, which comprises instruction codes for executing the terminal access method as described above.
It can be understood that any one of the terminal access device, the computer storage medium, or the computer program product provided above is used for executing the method corresponding to the first aspect provided above, and therefore, the beneficial effects that can be achieved by the terminal access device, the computer storage medium, or the computer program product may refer to the beneficial effects of the method according to the first aspect and the corresponding schemes in the following detailed description, and are not repeated herein.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of an NB-IoT network architecture according to an embodiment of the present invention;
Fig. 2 is a schematic diagram illustrating three coverage enhancement levels in an NB-IoT network according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a terminal access method according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a terminal access device according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a terminal access device according to another embodiment of the present invention.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
The NB-IoT is constructed in a cellular network, and supports the upgrade and evolution on the existing LTE network, so that the existing spectrum resources of operators can be fully utilized, and the spectrum utilization rate is improved; since NB-IoT is created based on a traffic model with low rate and low traffic frequency, a large number of users can be supported; and power saving technologies such as enhanced discontinuous reception (eDRX) and low power consumption mode (PSM) are also supported, so that power consumption of the terminal can be reduced. NB-IoT network architecture referring to fig. 1, the terminal 11, base station (eNodeB) comprising first base station (eNodeB1)121 and second base station (eNodeB2)122, IoT core network 13, IoT platform 14, and application server 15 are included. The terminal 11 is connected to the base station through an air interface; the base station mainly undertakes air interface access processing, cell management and other related functions, and is connected with the IoT core network 13 through an S1-lite interface; the IoT core network 13 undertakes the function of interacting with the non-access stratum of the terminal 11, and forwards IoT service data to the IoT platform 14 for processing; the IoT platform 14 aggregates IoT service data obtained from various access networks, and forwards the IoT service data to the corresponding service application server 15 according to different types of IoT service data for processing; the application server 15 is a final aggregation point of IoT service data, and performs operations such as data processing according to the needs of customers.
NB-IoT defines up to 3 coverage enhancement classes, and the number of coverage enhancement classes in the NB-IoT network is determined by the network side (which may be a base station), and in addition, the network side is configured with a corresponding Narrowband Physical Random Access Channel (NPRACH) resource for each coverage enhancement class, specifying the maximum number of attempted accesses for each coverage enhancement class, and the transmit power of the random access preamble. Referring to fig. 2, for each coverage enhancement level CE of each base station, a cell broadcasts a threshold list, also referred to as a target value list, of the reference signal received power of one base station 21, for example, if the base station 21 sets 3 coverage enhancement levels, the target values of the two reference signal received powers of the cell broadcasting the base station 21 are RSRP _0 and RSRP _1, respectively, where the coverage enhancement level CE0 is between the base station 21 and the first target value RSRP _0, the coverage enhancement level CE1 is between the first target value RSRP _0 and the second target value RSRP _1, and the coverage enhancement level CE2 is greater than the second target value RSRP _ 1.
In the prior art, the UE directly climbs to the CE1 for random access when the CE0 random access fails, and directly climbs to the CE2 for random access when the CE1 random access fails, without requirements for a network, but in actual situations, the network has differences, and once the network quality is not good, the number of times of terminal access failure is too many, which causes the terminal to directly climb to the CE2 for random access, easily causes the network load to be too high, and causes subsequent service blocking to cause a sudden drop in user experience.
Based on the NB-IoT network architecture and the coverage enhancement level defined under the NB-IoT network, the present application provides a terminal access method, which is shown in fig. 3 and specifically includes the following steps:
301. the terminal determines a coverage enhancement level.
Before the terminal determines to access the base station, a target value list of the reference signal receiving power of the base station is obtained through cell broadcasting, and the coverage enhancement grade of the terminal is determined through comparing the self reference signal receiving power with the target value list of the reference signal receiving power of the base station. For example, the first target value is RSRP _0, the second target value is RSRP _1, the reference signal received power of the terminal is RSRP, and when RSRP < RSRP _0, the terminal determines that the coverage enhancement level is CE 0.
302. And selecting a corresponding narrowband physical random access channel NPRACH according to the coverage enhancement grade.
Before selecting the NPRACH, the terminal first needs to determine a Physical Random Access Channel (PRACH) resource; secondly, random access lead code selection is required; finally, in PRAfter the ACH resource and the random access preamble are selected, the terminal selects an NPRACH configured by the base station for the coverage enhancement level according to the coverage enhancement level, where the NPRACH includes a maximum number of access attempts that can be performed by the base station in the coverage enhancement level and a transmission power of the random access preamble, and the setting of the transmission power of the target random access preamble is related to the coverage enhancement level of the terminal. For example, the transmit power calculation formula of the terminal random preamble of CE0 is: p NPRACH＝min{PCMAX-N，C(i)，NARROWBAND_PREAMBLE_RECEIVED_TARGET_POWER+PLc}[dBm]Wherein P isCMAX-N，C(i)Indicating a terminal maximum TRANSMISSION POWER configured by the NB-IoT system in subframe i for the serving cell c, PLc indicating a downlink path loss estimated by the terminal for the serving cell c, nar row band _ PREAMBLE _ receiveved _ TARGET _ POWER ═ preamplification receivable _ POWER + DELTA _ PREAMBLE + (PREAMBLE _ transition _ TRANSMISSION _ COUNTER-1) powerRampingStep-10 lgnumrepetitionpreamble attachment, preamplification recentpageroller indicating a random access PREAMBLE initial TARGET reception POWER, DELTA _ PREAMBLE indicating a POWER demand difference for different random access PREAMBLE formats, preamplamantmismatch _ COUNTER indicating a maximum number of attempted accesses, powerramdingstep indicating a POWER increment, and preamplification attack indicating a number of attempted accesses. The transmission power of the random access preamble of the terminals of CE1 and CE2 is the maximum transmission power.
303. And determining the maximum access attempt number set by the base station for the coverage enhancement level according to the NPRACH.
The NPRACH resource selected by the terminal includes the maximum number of access attempts that can be performed at the coverage enhancement level and the transmission power of the random access preamble, which are specified by the base station.
304. An attempt is made to access the base station on the NPRACH.
After the NPRACH is determined, the terminal sends a random access preamble to the base station on the NPRACH by using the set transmission power of the random preamble, and the base station is accessed in an attempt mode.
Once the random access preamble is sent out, a Medium Access Control (MAC) entity in the terminal opens an RAR window for receiving a Random Access Response (RAR). Each subcarrier of the random access preamble group corresponds to a random access preamble, so that a Random Access Preamble Identifier (RAPID) used for determining whether the random access is successful only needs to start a subcarrier index corresponding to the random access preamble, and therefore when a RAR window receives the RAR and the RAPID and subcarrier index results are consistent, the random access response is considered to be successfully received. And when the RAPID is not consistent with the subcarrier index result or the RAR is not received in the RAR window, the random access is considered to be unsuccessful, and the terminal performs random access preamble repeated transmission.
305. If the number of times of trying to access the base station on the NPRACH is equal to the maximum number of times of trying to access, acquiring the reference received power of the terminal and the predetermined threshold value of the reference signal received power of the base station.
When it is determined that the number of attempts to access the base station on the NPRACH is equal to the maximum number of attempts to access, the terminal access has not been successful, and then reference signal received power of the terminal is acquired. And then determining a predetermined threshold of the reference signal received power of the base station according to the target value list corresponding to the coverage enhancement level of the base station obtained in step 301 and the coverage enhancement level of the terminal.
Further, referring to fig. 2, the target values of the two reference signal received powers of the base station 21 are RSRP _0 and RSRP _1, respectively, wherein the coverage enhancement level CE0 is between the base station 21 and the first target value RSRP _0, the coverage enhancement level CE1 is between the first target value RSRP _0 and the second target value RSRP _1, and the coverage enhancement level CE2 is greater than the second target value RSRP _ 1. When the coverage enhancement level of the terminal is CE0, the predetermined threshold of the reference signal received power of the base station is RSRP _0- Δ RSRP0, where RSRP _0 represents a first target value of the reference signal received power of the base station, Δ RSRP0 represents a floating value of the reference signal received power of the base station, and Δ RSRP0 is broadcasted together when the cell broadcasts the reference signal received power.
Further, when the coverage enhancement level of the terminal is CE1, the terminal is located The predetermined threshold of the reference signal received power of the base station is RSRP1- Δ RSRP1, wherein RSRP _1 represents a second target value of the reference signal received power of the base station, and Δ RSRP1 represents a reset value of a floating value of the reference signal received power of the base station. The method comprises the steps that a reset value delta RSRP1 of a reference signal received power floating value of a base station is delta RSRP0 (B is an Occupancy rate of the base station, C is a Num CE0) + A is step, wherein the delta RSRP0 represents the reference signal received power floating value of the base station, the Occupancy rate of the base station represents the resource Occupancy rate of the base station, Num CE0 represents the proportion of users covering an enhancement grade CE0 to the total number of users of a full cell, step represents the step size of the reference signal received power of the base station, B is a constant, C is a constant, 1 is not less than B + C is not more than 2, and A is log2Numremblattempce, which indicates the number of attempts to access the base station.
306. And determining that the reference signal receiving power of the terminal is smaller than a preset threshold value, and after the coverage enhancement grade is upgraded, the terminal retries to access the base station.
For example, in step 305, the reference received power of the terminal is RSRP, the reference signal received power of the base station is floated to Δ RSRP0, and the first target value of the reference signal received power of the base station is RSRP _0, which indicates that the terminal is at CE0, when RSRP < RSRP _0 — Δ RSRP0, the terminal is upgraded from CE0 to CE1, and the process is resumed from step 301 after the upgrade.
For another example, in step 305, the reference received power of the terminal is RSRP, the reset value of the floating value of the reference received power of the base station is Δ RSRP1, and the predetermined threshold value of the reference received power of the base station is RSRP _1, which indicates that the terminal is at CE1, when the RSRP < RSRP _1, the terminal will upgrade from CE1 to CE2, and the execution is resumed from step 301 after the upgrade.
In the scheme, the terminal determines the coverage enhancement level; selecting a corresponding narrowband physical random access channel NPRACH according to the coverage enhancement grade; determining the maximum access attempt times set for the coverage enhancement level by the base station according to the NPRACH; attempting access to a base station on the NPRACH; if the number of times of trying to access the base station on the NPRACH is equal to the maximum number of times of trying to access the base station, acquiring the reference receiving power of the terminal and the preset threshold value of the reference signal receiving power of the base station; and determining that the reference signal receiving power of the terminal is smaller than a preset threshold value, and after the coverage enhancement grade is upgraded, the terminal retries to access the base station. Firstly, the method determines whether the terminal can upgrade the coverage enhancement grade or not by determining that the number of times that the terminal tries to access the base station is equal to the maximum number of times that the base station sets, and then determining whether the terminal can upgrade the coverage enhancement grade or not according to the preset threshold that the reference signal receiving power of the terminal is smaller than the reference signal receiving power of the base station, thereby avoiding the problem that the network load is too high and the subsequent service blocking is caused to cause the sudden drop of user experience in the prior art that the number of times that the terminal tries to access the base station is once equal to the maximum number of times that the base station sets. Secondly, the predetermined threshold of the reference signal received power of the base station in the present application is related to the reset value of the floating value of the reference signal received power of the base station, and the worse the network coverage of CE2, the larger the reset value of the floating value of the reference signal received power of the base station will be, so the network quality will not rise to CE2 when it is bad, avoiding the problem of too high network load caused by the situation that the terminal directly climbs to CE2 for random access due to too many times of access failure of the terminal under the situation of bad network quality.
In the embodiment of the present invention, the terminal access device may be divided into functional modules according to the method embodiments described above, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, the division of the modules in the embodiment of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation.
In the case of dividing each functional module according to each function, fig. 4 provides a schematic diagram of a possible structure of the terminal access device in the above embodiment. The terminal access method is implemented, wherein the terminal access device is applied to the terminal, and may be the terminal itself or a chip or a functional entity thereon. Specifically, the method comprises the following steps:
a determining module 41, configured to determine a coverage enhancement level by the terminal; a selecting module 42, configured to select a corresponding narrowband physical random access channel NPRACH according to the coverage enhancement level determined by the determining module 41; an obtaining module 43, configured to determine, according to the NPRACH selected by the selecting module 42, a maximum number of access attempts set by the base station for the coverage enhancement level; an access module 44 for attempting to access a base station on the NPRACH selected by the selection module 42; the obtaining module 43 is further configured to obtain a reference received power of the terminal and a predetermined threshold of the reference signal received power of the base station if it is determined that the number of times that the access module 44 attempts to access the base station on the NPRACH is equal to the maximum number of times of access attempts; a processing module 45, configured to determine that the reference signal received power of the terminal acquired by the acquiring module 43 is smaller than the predetermined threshold, and after the coverage enhancement level is upgraded, the terminal reattempts to access the base station.
Optionally, the obtaining module 43 is further configured to, if the terminal determines that the enhanced coverage level is CE0, determine that the predetermined threshold is RSRP _0- Δ RSRP0, where RSRP _0 represents a first target value of the reference signal received power of the base station, and Δ RSRP0 represents a floating value of the reference signal received power of the base station.
Optionally, the obtaining module 43 is further configured to, if the terminal determines that the enhanced coverage level is CE1, determine that the predetermined threshold is RSRP _1- Δ RSRP1, where RSRP _1 represents a second target value of the reference signal received power of the base station, and Δ RSRP1 represents a reset value of the floating value of the reference signal received power of the base station.
Optionally, the reset value Δ RSRP1 ═ Δ RSRP0 × (B × Occupancy _ rate + C × Num _ CE0) + a × step of the reference signal received power floating value of the base station, where Δ RSRP0 represents the reference signal received power floating value of the base station, Occupancy _ rate represents the resource Occupancy of the base station, Num _ CE0 represents the proportion of users covering the enhancement level CE0 to the total number of users in the full cell, step represents the step size of the reference signal received power of the base station, B is a constant, C is a constant, and 1 ≦ B + C ≦ 2, and a ≦ log 2NumPreaThe mbleAttemptCE, NumPreampleAttemptCE indicates the number of times the access to the base station is attempted.
In case of adopting an integrated module, the terminal access device comprises: the device comprises a storage unit, a processing unit and an interface unit. The processing unit is used for controlling and managing the action of the terminal access device. And the interface unit is used for information interaction between the terminal access device and other equipment. And a storage unit for storing program codes and data of the terminal access device.
For example, the processing unit is a processor, the storage unit is a memory, and the interface unit is a communication interface. The terminal access device is shown in fig. 5 and includes a communication interface 501, a processor 502, a memory 503 and a bus 504, and the communication interface 501 and the processor 502 are connected to the memory 503 through the bus 504.
The processor 502 may be a general-purpose Central Processing Unit (CPU), a microprocessor, an Application-Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to control the execution of programs in accordance with the teachings of the present disclosure.
The Memory 503 may be a Read-Only Memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical Disc storage, optical Disc storage (including Compact Disc, laser Disc, optical Disc, digital versatile Disc, blu-ray Disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to these. The memory may be self-contained and coupled to the processor via a bus. The memory may also be integral to the processor.
The memory 503 is used for storing application program codes for executing the scheme of the application, and the processor 502 controls the execution. The communication interface 501 is used for information interaction with other devices, for example, to support information interaction between the terminal access device and other devices, for example, to obtain data from other devices or send data to other devices. The processor 502 is configured to execute application program code stored in the memory 503 to implement the methods described in the embodiments of the present application.
Further, a computing storage medium (or media) is also provided, which comprises instructions that when executed perform the method operations performed by the terminal access device in the above embodiments. Additionally, a computer program product is also provided, comprising the above-described computing storage medium (or media).
All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and the function thereof is not described herein again.
It should be understood that, in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. 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.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (6)
1. A terminal access method, characterized in that,
the terminal determines a coverage enhancement grade;
selecting a corresponding narrowband physical random access channel NPRACH according to the coverage enhancement grade;
determining the maximum access attempt times set for the coverage enhancement grade by the base station according to the NPRACH;
attempting access to a base station on the NPRACH;
if the number of times of trying to access the base station on the NPRACH is equal to the maximum number of times of trying to access the base station, acquiring the reference signal received power of the terminal and a preset threshold value of the reference signal received power of the base station;
determining that the reference signal receiving power of the terminal is smaller than the preset threshold value, and after the coverage enhancement grade of the terminal is upgraded, retrying to access the base station;
if the terminal determines that the enhanced coverage level is CE1, the predetermined threshold is RSRP _1- Δ RSRP1, wherein RSRP _1 represents a second target value of the reference signal received power of the base station, and Δ RSRP1 represents a reset value of a floating value of the reference signal received power of the base station;
A reset value Δ RSRP1 ═ Δ RSRP0 × (B × Occupancy _ rate + C × Num _ CE0) + a ·stepof the reference signal received power floating value of the base station, wherein Δ RSRP0 represents the reference signal received power floating value of the base station, Occupancy _ rate represents the resource Occupancy of the base station, Num _ CE0 represents the proportion of users covering the enhancement level CE0 to the total number of users in the full cell, step represents the step size of the reference signal received power of the base station, B is a constant, C is a constant, and 1 ≦ B + C ≦ 2, and a ≦ l is l ≦ B + C ≦ 2og2Numrembleattamtce, which indicates the number of times the access to the base station is attempted.
2. The terminal access method of claim 1,
if the terminal determines that the enhanced coverage level is CE0, the predetermined threshold is RSRP _0- Δ RSRP0, wherein RSRP _0 represents a first target value of the reference signal received power of the base station, and Δ RSRP0 represents a floating value of the reference signal received power of the base station.
3. A terminal access device for a terminal or a chip on the terminal,
the determining module is used for determining the coverage enhancement grade by the terminal;
a selection module, configured to select a corresponding narrowband physical random access channel NPRACH according to the coverage enhancement level determined by the determination module;
An obtaining module, configured to determine, according to the NPRACH selected by the selecting module, a maximum number of access attempts set by the base station for the coverage enhancement level;
an access module for attempting to access a base station on the NPRACH selected by the selection module;
the obtaining module is further configured to obtain a reference signal received power of the terminal and a predetermined threshold of the reference signal received power of the base station if it is determined that the number of times that the access module attempts to access the base station on the NPRACH is equal to the maximum number of times of access attempts;
a processing module, configured to determine that the reference signal received power of the terminal obtained by the obtaining module is smaller than the predetermined threshold, and after the coverage enhancement level is upgraded, the terminal reattempts to access the base station;
the obtaining module is further configured to, if the terminal determines that the enhanced coverage level is CE1, determine that the predetermined threshold is RSRP _1- Δ RSRP1, where RSRP _1 represents a second target value of the reference signal received power of the base station, and Δ RSRP1 represents a reset value of a floating value of the reference signal received power of the base station;
a reset value Δ RSRP1 ═ Δ RSRP0 × (B × Occupancy _ rate + C × Num _ CE0) + a ·stepof the reference signal received power floating value of the base station, wherein Δ RSRP0 represents the reference signal received power floating value of the base station, Occupancy _ rate represents the resource Occupancy of the base station, Num _ CE0 represents the proportion of users covering the enhancement level CE0 to the total number of users in the full cell, step represents the step size of the reference signal received power of the base station, B is a constant, C is a constant, and 1 ≦ B + C ≦ 2, a ≦ log 2Numrembleattamtce, which indicates the number of times the access to the base station is attempted.
4. The terminal access device of claim 3,
the obtaining module is further configured to, if the terminal determines that the enhanced coverage level is CE0, determine that the predetermined threshold is RSRP _0- Δ RSRP0, where RSRP _0 represents a first target value of the reference signal received power of the base station, and Δ RSRP0 represents a floating value of the reference signal received power of the base station.
5. A terminal access device is used for a terminal or a chip on the terminal and is characterized by comprising a communication interface, a processor, a memory and a bus; the memory is used for storing computer-executable instructions, the processor is connected with the memory through the bus, and when the terminal access device runs, the processor executes the computer-executable instructions stored in the memory so as to enable the terminal access device to execute the terminal access method according to any one of claims 1-2.
6. A computer storage medium comprising instructions that, when executed on a computer, cause the computer to perform the terminal access method of any of claims 1-2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910367960.4A CN110234151B (en) | 2019-05-05 | 2019-05-05 | Terminal access method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910367960.4A CN110234151B (en) | 2019-05-05 | 2019-05-05 | Terminal access method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110234151A CN110234151A (en) | 2019-09-13 |
| CN110234151B true CN110234151B (en) | 2021-03-12 |
Family
ID=67860608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910367960.4A Active CN110234151B (en) | 2019-05-05 | 2019-05-05 | Terminal access method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110234151B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112752241B (en) * | 2019-10-31 | 2022-11-11 | 成都鼎桥通信技术有限公司 | Method and device for switching overlay mode of eMTC terminal |
| CN111586733B (en) * | 2020-05-22 | 2023-05-30 | 中国联合网络通信集团有限公司 | Edge rate determining method and device |
| WO2021109502A1 (en) * | 2020-05-29 | 2021-06-10 | Zte Corporation | Configuration of random access preamble |
| KR20230147716A (en) * | 2021-02-24 | 2023-10-23 | 베이징 시아오미 모바일 소프트웨어 컴퍼니 리미티드 | NETWORK ACCESS METHOD, NETWORK ACCESS APPARATUS, AND STORAGE MEDIUM |
| CN113873673B (en) * | 2021-04-26 | 2022-09-13 | 深圳市汇顶科技股份有限公司 | Data transmission method of NB-IOT (network B-Internet of things) terminal, NB-IOT chip, device and communication system |
| CN113556827B (en) * | 2021-06-22 | 2023-05-26 | 深圳市汇顶科技股份有限公司 | Data transmission method of NB-IOT (node B-area network) terminal, NB-IOT chip, device and communication system |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104812082A (en) * | 2014-01-23 | 2015-07-29 | 上海贝尔股份有限公司 | Method and device for efficient random access of user equipment |
| CN105379360A (en) * | 2014-01-24 | 2016-03-02 | 华为技术有限公司 | Coverage enhancement transmission apparatus, system and method for system message |
| CN106233794A (en) * | 2014-01-29 | 2016-12-14 | 交互数字专利控股公司 | The access being wirelessly transferred for coverage enhancement and the method for link circuit self-adapting |
| CN107734667A (en) * | 2016-08-12 | 2018-02-23 | 夏普株式会社 | Perform method, user equipment and the base station of Stochastic accessing |
| CN108234095A (en) * | 2016-12-15 | 2018-06-29 | 北京信威通信技术股份有限公司 | A kind of method that uplink number of repetition is determined in narrowband Internet of Things |
| CN109041255A (en) * | 2018-09-21 | 2018-12-18 | 中国联合网络通信集团有限公司 | A kind of cut-in method and UE |
| WO2018237289A1 (en) * | 2017-06-22 | 2018-12-27 | Intel Corporation | Access control for user equipment with coverage enhancement level support |
| CN109121196A (en) * | 2018-09-29 | 2019-01-01 | 中国联合网络通信集团有限公司 | Terminal transmission Poewr control method and device based on NB-IoT system |
| CN109168169A (en) * | 2018-08-31 | 2019-01-08 | 中国联合网络通信集团有限公司 | A kind of covering grade upgrade method and device |
| CN109275157A (en) * | 2018-11-28 | 2019-01-25 | 中国联合网络通信集团有限公司 | A kind of the configuration parameter optimization method and device of the NPRACE of base station |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10117152B2 (en) * | 2015-05-13 | 2018-10-30 | Qualcomm Incorporated | Cell selection procedures for machine type communication devices |
-
2019
- 2019-05-05 CN CN201910367960.4A patent/CN110234151B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104812082A (en) * | 2014-01-23 | 2015-07-29 | 上海贝尔股份有限公司 | Method and device for efficient random access of user equipment |
| CN105379360A (en) * | 2014-01-24 | 2016-03-02 | 华为技术有限公司 | Coverage enhancement transmission apparatus, system and method for system message |
| CN106233794A (en) * | 2014-01-29 | 2016-12-14 | 交互数字专利控股公司 | The access being wirelessly transferred for coverage enhancement and the method for link circuit self-adapting |
| CN107734667A (en) * | 2016-08-12 | 2018-02-23 | 夏普株式会社 | Perform method, user equipment and the base station of Stochastic accessing |
| CN108234095A (en) * | 2016-12-15 | 2018-06-29 | 北京信威通信技术股份有限公司 | A kind of method that uplink number of repetition is determined in narrowband Internet of Things |
| WO2018237289A1 (en) * | 2017-06-22 | 2018-12-27 | Intel Corporation | Access control for user equipment with coverage enhancement level support |
| CN109168169A (en) * | 2018-08-31 | 2019-01-08 | 中国联合网络通信集团有限公司 | A kind of covering grade upgrade method and device |
| CN109041255A (en) * | 2018-09-21 | 2018-12-18 | 中国联合网络通信集团有限公司 | A kind of cut-in method and UE |
| CN109121196A (en) * | 2018-09-29 | 2019-01-01 | 中国联合网络通信集团有限公司 | Terminal transmission Poewr control method and device based on NB-IoT system |
| CN109275157A (en) * | 2018-11-28 | 2019-01-25 | 中国联合网络通信集团有限公司 | A kind of the configuration parameter optimization method and device of the NPRACE of base station |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110234151A (en) | 2019-09-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110234151B (en) | Terminal access method and device | |
| US11032761B2 (en) | Method and device for selecting camping cell | |
| US11864155B2 (en) | Paging method, base station, and user equipment | |
| US10420032B2 (en) | Preamble sequence sending method and apparatus | |
| US11641616B2 (en) | Access control method, communications device, and base station | |
| US11778668B2 (en) | Communication method and device | |
| US11902192B2 (en) | Method and apparatus for determining power | |
| US10165586B2 (en) | Method and device for determining remote radio unit | |
| US20130078999A1 (en) | Delay of access to assist management of congestion in radio access networks | |
| CN109548167B (en) | Coverage range self-adaptive adjusting method and device, computer storage medium and equipment | |
| CN110267296B (en) | State detection method and device | |
| CN108306718B (en) | Carrier aggregation method, system and base station | |
| CN111885651A (en) | Processing method and device for service concurrency of Internet of things | |
| CN113923708B (en) | Access and release method and device of auxiliary node, electronic equipment and storage medium | |
| WO2021163851A1 (en) | Method and apparatus for adjusting random access parameter, and device and storage medium | |
| CN110650522B (en) | Closed-loop power control method, network side equipment and terminal | |
| EP3979750A1 (en) | Random access method and related device | |
| WO2019095191A1 (en) | Method and apparatus providing access control | |
| CN113556827B (en) | Data transmission method of NB-IOT (node B-area network) terminal, NB-IOT chip, device and communication system | |
| EP2849525A2 (en) | Method and device for scheduling downlink resources | |
| CN117641393A (en) | Detection method and detection device, network equipment and storage medium | |
| CN117835249A (en) | Communication network load adjustment method, electronic device, and storage medium | |
| CN115915417A (en) | Random access resource determination method, random access method, communication node, and medium | |
| CN115580930A (en) | Downlink channel power allocation method, communication device and storage medium | |
| CN112423380A (en) | Method and device for distributing sub-band power of base station |
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 |