CN110392434B - Method for accessing frequency point under discrete sub-band, base station and terminal - Google Patents
Method for accessing frequency point under discrete sub-band, base station and terminal Download PDFInfo
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- 230000006854 communication Effects 0.000 claims description 32
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- 238000012360 testing method Methods 0.000 claims description 18
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- 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
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- 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
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- 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
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Abstract
The embodiment of the invention discloses a method, a base station and a terminal for accessing frequency points under discrete sub-bands. The terminal obtains the target broadcast information and sends the selected random access code to the base station, and the base station and the terminal determine a target sub-band for transmitting the random access response according to the random access code. After receiving the random access response sent by the base station through the target sub-band, the terminal performs information interaction with the base station according to the sub-band in the random access response. The base station marks available sub-bands in the sub-bands, and determines a target sub-band from the available sub-bands according to the random access code, so that the selected target sub-band can be ensured to be the available sub-band under the condition that the frequency spectrum resource is changed, and successful issuing and receiving of the random access response are ensured.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a method for accessing a frequency point under a discrete sub-band, a base station and a terminal.
Background
With the development of smart power grids, the power consumption information acquisition system provides new and higher requirements for communication channels. The 230MHz frequency band is mainly applied to a data transmission radio station to bear remote data acquisition work, and can only be used for some simple communication applications due to low provided speed, so that the increasing service demands of a smart grid and a sensor network can not be met. The TD-LTE230 electricity consumption information acquisition system is a wireless communication system which is innovatively developed and deeply customized by using 230MHz frequency band discrete spectrum resources in the power industry and combining advanced technologies such as spectrum sensing, carrier aggregation, interference demodulation, software radio and the like. Aiming at deep customization of power service communication requirements, a public network TD-LTE technical system, a communication protocol and a networking structure are optimized, and terminal capacity and service instantaneity are improved.
The 223.025-235.000 MHz frequency band is a frequency band used by telemetry, remote control, data transmission and other industries, and consists of a plurality of 25k channels which are distributed in a scattered way, and adjacent frequencies are already assigned for other industries to use without wider continuous spectrum resources. The total of 40 power authorization frequency points are distributed in a discrete and unequal interval mode, the low-frequency 15 frequency points are called a first cluster, the 10 frequency points in the middle frequency range are called a second cluster, and the 15 frequency points in the high frequency range are called a third cluster. And selecting a middle frequency point as a synchronous sub-band in each cluster, wherein downlink resources are used for transmitting broadcast signals, carrying out cell search and synchronization, and corresponding uplink resources are used for carrying out random access. The remaining 37 frequency points are used as service sub-bands. It follows that the access subbands between the terminal and the base station are fixedly configured.
In the process of implementing the embodiment of the invention, the inventor finds that the access sub-band between the terminal and the base station is fixedly configured, when the frequency spectrum resource is changed, the sending of the random access response can not be completed, and the success rate of receiving the random access response is reduced.
Disclosure of Invention
The invention solves the technical problem that the prior access sub-band between the terminal and the base station is fixedly configured, when the frequency spectrum resource is changed, the transmission of the random access response can not be completed, and the success rate of receiving the random access response is reduced.
Aiming at the technical problems, the embodiment of the invention provides a method for accessing frequency points under a discrete sub-band, which comprises the following steps:
acquiring a first preset authorized sub-band table, testing each sub-band in the first authorized sub-band table, and marking available sub-bands which are not interfered currently;
generating target broadcast information according to the marking information of the available sub-bands, and sending the target broadcast information;
and if the random access code sent by the terminal is received, determining a target sub-band according to the target broadcast information, the first authorized sub-band table and the random access code, and sending a random access response to the terminal through the target sub-band.
In a second aspect, an embodiment of the present invention provides a method for accessing a frequency point under a discrete subband, including:
after receiving an instruction for information interaction with a base station, acquiring target broadcast information, determining a first authorization sub-band table configured at the base station for issuing the target broadcast information according to the target broadcast information, and acquiring a second authorization sub-band table which is stored in advance and is the same as the first authorization sub-band table;
randomly selecting a random access code from a random access code range corresponding to the second authorization sub-band table;
and transmitting the random access code to the base station, determining a target sub-band according to the target broadcast information, the second authorized sub-band table and the random access code, and receiving the random access response through the target sub-band.
In a third aspect, the present embodiment provides a base station, including:
the first acquisition module is used for acquiring a preconfigured first authorized sub-band table, testing each sub-band in the first authorized sub-band table and marking available sub-bands which are not interfered currently;
a sending module, configured to generate target broadcast information according to the marking information of the available sub-band, and send the target broadcast information;
And the first processing module is used for determining a target sub-band according to the target broadcast information, the first authorized sub-band table and the random access code if the random access code sent by the terminal is received, and sending a random access response to the terminal through the target sub-band.
In a fourth aspect, an embodiment of the present invention provides a terminal, including:
the second acquisition module is used for acquiring target broadcast information after receiving an instruction for information interaction with the base station, determining a first authorization sub-band table configured at the base station for issuing the target broadcast information according to the target broadcast information, and acquiring a second authorization sub-band table which is pre-stored and is the same as the first authorization sub-band table;
a selecting module, configured to randomly select a random access code from a random access code range corresponding to the second authorization sub-band table;
and the second processing module is used for sending the random access code to the base station, determining a target sub-band according to the target broadcast information, the second authorized sub-band table and the random access code, and receiving the random access response through the target sub-band.
In a fifth aspect, the present embodiment provides a base station, including:
At least one processor, at least one memory, a communication interface, and a bus; wherein,,
the processor, the memory and the communication interface complete the communication with each other through the bus;
the communication interface is used for information transmission between the communication equipment of the base station and the terminal;
the memory stores program instructions executable by the processor, which invokes the program instructions to perform the method described above.
In a fourth aspect, embodiments of the present invention provide a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, cause the computer to perform any of the methods described above.
The embodiment of the invention provides a method, a base station and a terminal for accessing frequency points under discrete sub-bands. Before the terminal and the base station interact, the terminal acquires the target broadcast information and sends the selected random access code to the base station, and meanwhile, the base station and the terminal determine a target sub-band for transmitting random access response according to the random access code. After receiving the random access response sent by the base station through the target sub-band, the terminal performs information interaction with the base station according to the sub-band in the random access response. The base station marks available sub-bands in the sub-bands, and determines a target sub-band from the available sub-bands according to the random access code, so that the selected target sub-band can be ensured to be the available sub-band under the condition that the frequency spectrum resource is changed, and successful issuing and receiving of the random access response are ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a method for accessing a frequency point under a discrete subband according to an embodiment of the present invention;
fig. 2 is a schematic diagram of mapping relationship between a random access code and a service subband in the prior art according to another embodiment of the present invention;
FIG. 3 is a schematic diagram of marking whether a subband in the authorized subband table is an available subband according to another embodiment of the present invention;
fig. 4 is a flowchart of a method for discrete sub-band access frequency points according to another embodiment of the present invention;
fig. 5 is a block diagram of a base station according to another embodiment of the present invention;
fig. 6 is a block diagram of a terminal according to another embodiment of the present invention;
fig. 7 is a schematic physical structure of a base station according to another embodiment of the present invention;
Fig. 8 is a schematic entity structure of a terminal according to another embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Fig. 1 is a flow chart of a method for accessing a frequency point under a discrete subband, which is provided in this embodiment, referring to fig. 1, and the method includes:
101: acquiring a first preset authorized sub-band table, testing each sub-band in the first authorized sub-band table, and marking available sub-bands which are not interfered currently;
102: generating target broadcast information according to the marking information of the available sub-bands, and sending the target broadcast information;
103: and if the random access code sent by the terminal is received, determining a target sub-band according to the target broadcast information, the first authorized sub-band table and the random access code, and sending a random access response to the terminal through the target sub-band.
It should be noted that, the method provided in this embodiment is executed by the base station, and is applicable to a communication process before the base station and the terminal perform information interaction. In the method provided in this embodiment, each base station is configured with an authorized subband table, where a subband (a frequency point) used for communication, a subband index (a number corresponding to each subband in the entire spectrum) and an index (a number corresponding to each subband in the authorized subband table) corresponding to each subband are recorded in the authorized subband table. Further, there are a total of 3 licensed sub-band tables, and the sub-band indexes of the sub-bands in the 3 licensed sub-band tables are respectively between 0-159MHz, 160-319 MHz and 320-379 MHz. The first grant sub-band table is one of these 3 grant sub-band tables.
Before the base station transmits broadcast information each time, each sub-band in the configured first authorized sub-band table is tested through a sweep generator, parameters such as interference power, interference frequency and the like of the sub-band (the greater the interference power or the greater the interference frequency, the higher the interference degree of the sub-band) are tested, whether the sub-band is interfered or not is judged, and the interfered sub-band and the sub-band which is not interfered are marked. The marking information is information marking which sub-bands in the first authorized sub-band table are available sub-bands. The random access code is a number that is optional by the terminal from the corresponding random access code range. After the terminal selects the random access code, the terminal and the base station both select a sub-band for transmitting the random access response from the marked available sub-bands according to the random access code. The random access response is information issued to the terminal by the base station, and the information comprises frequency point information of subsequent communication between the terminal and the base station. Each base station periodically transmits broadcast information.
In order to further explain the problem of low success rate of receiving a random access response caused by the change of frequency resources, fig. 2 is a schematic diagram of mapping relationships between a random access code and a service subband in the prior art, referring to fig. 2, among 40 frequency points of the existing power grant, 15 frequency points of a low frequency band are called a first cluster, 10 frequency points of a middle frequency band are called a second cluster, and 15 frequency points of a high frequency band are called a third cluster. One sub-band in each of the 3 clusters is reserved as a periodical sending broadcast signal and a synchronous signal, and the uplink sub-frames on the 3 sub-bands are idle, so that the uplink pilot time slots of the 3 sub-bands and the idle uplink sub-frames are all used as physical random access channel resources, and each sub-band is responsible for scheduling the sub-band of the cluster where the random access is successful as the uplink grant of the random access response. Since the above-mentioned one idle sub-band has 7 idle resources (the sub-band where the broadcast signal of each cell is located is the same, so only 1 orthogonal code resource can be used) in one radio frame, and 14 idle resources are in two radio frames, so that the two radio frames are used as a group to number the 14 idle resources to correspond to the sub-bands in the current cluster one by one. Therefore, after the user selects a specific resource to send the random access code, the random access response message is received on the specific sub-band to obtain the corresponding uplink authorization.
For two clusters of 15 subbands, the two radio frames share 14 random resources, and just 14 service subbands in the cluster can be mapped; for a cluster of 10 subbands, the phenomenon occurs that 14 random access resources correspond to 9 common subbands. In either case, the selected random access resource may be mapped to a particular subband according to a particular mapping formula. As shown in fig. 2, since the random access code is mapped to 14 resources as shown in fig. 2, when some of the 14 resources are abnormal, it is still possible to be used as a subband for receiving the random access response, resulting in a failure of transmitting the random access response or a failure of receiving the random access response.
To solve the above problem, the present embodiment introduces an authorized subband table, and fig. 3 is a schematic diagram showing whether the subbands in the authorized subband table are available subbands, referring to fig. 3, for 20 subbands in the authorized subband table, the available subbands that are not interfered are marked as 1, and the subbands that are interfered are marked as 0. After the terminal selects the random access code, the random access code is mapped in the sub-band marked as 1, so that the target sub-band determined according to the random access code is an undisturbed available sub-band, and a guarantee is provided for successful transmission and reception of the random access response.
The embodiment provides a method for accessing a frequency point under a discrete sub-band, in which a base station tests each sub-band in a configured first authorized sub-band table, marks available sub-bands which are not currently interfered, and sends target broadcast information generated according to marking information. Before the terminal and the base station interact, the terminal acquires the target broadcast information and sends the selected random access code to the base station, and meanwhile, the base station and the terminal determine a target sub-band for transmitting random access response according to the random access code. After receiving the random access response sent by the base station through the target sub-band, the terminal performs information interaction with the base station according to the sub-band in the random access response. The base station marks available sub-bands in the sub-bands, and determines a target sub-band from the available sub-bands according to the random access code, so that the selected target sub-band can be ensured to be the available sub-band under the condition that the frequency spectrum resource is changed, and successful issuing and receiving of the random access response are ensured.
Further, on the basis of the foregoing embodiment, the obtaining a preconfigured first authorized sub-band table, testing each sub-band in the first authorized sub-band table, marking available sub-bands that are not currently interfered, includes:
Acquiring a first preset authorized sub-band table, testing each sub-band in the first authorized sub-band table, and judging whether the sub-band is currently interfered or not;
if the sub-band is not interfered currently, the sub-band is an available sub-band, marking is carried out through a first character, otherwise, marking is carried out through a second character;
and taking the marked first character and second character as the marking information according to the sequence of the sub-bands in the first authorization sub-band table.
The first character and the second character are preset characters for determining whether the zone is interfered, for example, the first character is 1, the second character is 0, or the first character is 0, and the second character is 1, which is not particularly limited in this embodiment. The flag information is a character of whether each subband is an available subband or not, which is arranged in the order of each subband in the authorized subband table.
The embodiment provides a method for accessing frequency points under discrete sub-bands, which limits how to mark whether each sub-band is an available sub-band, enables a base station and a server to screen out the available sub-bands in an authorized sub-band table through marking information, and selects a target sub-band for receiving random access response from the available sub-bands according to a random access code.
Further, on the basis of the foregoing embodiments, if the random access code sent by the terminal is received, determining a target subband according to the target broadcast information, the first grant subband table and the random access code, and sending a random access response to the terminal through the target subband, where the determining includes:
if a random access code sent by a terminal is received, calculating a first number of sub-bands marked as the first character according to the target broadcast information, and calculating a remainder of dividing the random access code by the first number;
and selecting a sub-band corresponding to the remainder from sub-bands marked as the first character as the target sub-band corresponding to the first authorized sub-band table, and sending a random access response to the terminal through the target sub-band.
Specifically, the target subband may be calculated by msg2_position=preamble_id mod ndaatasb. Where mod is a remainder function, ndaatasb is the number of subbands marked as available in the grant subband table, preamble_id is an index corresponding to the random access code, and msg2_position is a subband (frequency point) corresponding to the random access code. For example, as shown in fig. 3, the terminal randomly selects one from the indexes, as the random access code, the selected random access code is 18, that is, preamble_id is 18, and referring to the marking information corresponding to each sub-band, it can be known that the available sub-band marked as 1 is 10, that is, ndaatasb is 10 (first number), then the remainder of dividing the random access code by the first number is calculated according to the above formula to be 8, and then the sub-band marked as 1 of 8 th is selected as the target sub-band from the sub-bands marked as 1 in the order of the indexes from small to large, that is, the sub-band marked as 14 is the target sub-band, and the frequency point is 224.650.
Among the base stations in the same cell, there are a base station in which an authorized sub-band table with a frequency point in the range of 0 to 159MHz, a base station in which an authorized sub-band table with a frequency point in the range of 160 to 319MHz is allocated, and a base station in which an authorized sub-band table with a frequency point in the range of 320 to 379MHz is allocated. All base stations send broadcast information according to the method, and the base stations send the broadcast information through 3 broadcast channels, so that the data bearing capacity of single broadcast is reduced.
The embodiment provides a method for accessing a frequency point under a discrete sub-band, which maps a random access code to an available sub-band by a method for calculating a remainder, and ensures that the sub-band for receiving a random access response is the available sub-band.
Based on the method executed by the base station, the present embodiment provides a method for accessing a frequency point under a discrete subband, and fig. 4 is a schematic flow chart of the method provided in the present embodiment, referring to fig. 4, where the method includes:
401: after receiving an instruction for information interaction with a base station, acquiring target broadcast information, determining a first authorization sub-band table configured at the base station for issuing the target broadcast information according to the target broadcast information, and acquiring a second authorization sub-band table which is stored in advance and is the same as the first authorization sub-band table;
402: randomly selecting an index number from a random access code range corresponding to the second authorization sub-band table as a random access code;
403: and transmitting the random access code to the base station, determining a target sub-band according to the target broadcast information, the second authorized sub-band table and the random access code, and receiving the random access response through the target sub-band.
It should be noted that, the method provided in this embodiment is executed by a terminal (for example, a mobile phone, a computer, etc.), and is applicable to a communication process before information interaction between a base station and the terminal. Typically, when a user triggers a certain function of the terminal, for example, a function of dialing a call or a function of sending a short message, the user triggers a function of receiving an instruction for information interaction with the base station. Each terminal is configured with the 3 types of grant subband tables described above. After the terminal obtains the target broadcast information, it determines which authorization sub-band table the authorization sub-band table corresponding to the target broadcast information is from the information of the authorization sub-band table carried in the target broadcast information, for example, the authorization sub-band table corresponding to the target broadcast information is the first authorization sub-band table. And then selecting a second authorized sub-band table which is the same as the first authorized sub-band table from the sub-band tables stored in advance, and randomly selecting a random access code according to indexes of sub-bands in the second authorized sub-band table.
After selecting the random access code, the terminal sends the random access code to the base station on one hand, and determines the target sub-band corresponding to the random access code by the same method. And receiving the random access response sent by the base station through the target sub-band.
The embodiment provides a method for accessing a frequency point under a discrete sub-band, in which a base station tests each sub-band in a configured first authorized sub-band table, marks available sub-bands which are not currently interfered, and sends target broadcast information generated according to marking information. Before the terminal and the base station interact, the terminal acquires the target broadcast information and sends the selected random access code to the base station, and meanwhile, the base station and the terminal determine a target sub-band for transmitting random access response according to the random access code. After receiving the random access response sent by the base station through the target sub-band, the terminal performs information interaction with the base station according to the sub-band in the random access response. The base station marks available sub-bands in the sub-bands, and determines a target sub-band from the available sub-bands according to the random access code, so that the selected target sub-band can be ensured to be the available sub-band under the condition that the frequency spectrum resource is changed, and successful issuing and receiving of the random access response are ensured.
Further, on the basis of the foregoing embodiments, after receiving the instruction for information interaction with the base station, obtaining the target broadcast information includes:
after receiving the instruction of information interaction with the base station, acquiring broadcast information, and selecting the broadcast information sent by the broadcast channel with the best signal as the target broadcast information.
Still further, on the basis of the above embodiment, the transmitting the random access code to the base station, and determining a target subband according to the target broadcast information, the second grant subband table, and the random access code, includes:
transmitting the random access code to the base station, and calculating a first number of subbands marked as a first character according to the target broadcast information, and calculating a remainder of dividing the random access code by the first number;
and selecting a sub-band corresponding to the remainder from sub-bands marked as the first character as the target sub-band corresponding to the second authorized sub-band table, and sending a random access response to the terminal through the target sub-band.
It should be noted that, the first authorization sub-band table and the second authorization sub-band table are identical, the calculation process of determining the target sub-band by the terminal according to the random access code and the calculation process of determining the target sub-band by the base station according to the random access code are identical, which is not repeated in this embodiment.
The embodiment provides a method for accessing a frequency point under a discrete sub-band, which maps a random access code to an available sub-band by a method for calculating a remainder, and ensures that the sub-band for receiving a random access response is the available sub-band.
As a complete process of interaction between a base station and a terminal in a method for accessing a frequency point under a discrete sub-band, the method provided in this embodiment includes:
(1) The base station periodically transmits broadcast information, tests whether each sub-band in a preset authorized sub-band table is an available sub-band or not when transmitting the broadcast information each time, marks the sub-band to obtain mark information, and transmits the mark information and the broadcast information together;
(2) After receiving an instruction for information interaction with a base station, a terminal acquires broadcast information periodically issued by the base station, selects target broadcast information from the broadcast information, determines a first authorization sub-band table configured at the base station for issuing the target broadcast information according to the target broadcast information, and acquires a second authorization sub-band table identical to the first authorization sub-band table from a prestored authorization sub-band table;
(3) The terminal randomly selects a random access code from the range of the random access codes corresponding to the second authorization sub-band table, and sends the random access code to the base station (namely, the base station for sending the target broadcast information);
(4) After receiving the random access code, the base station maps the random access code to an available sub-band in a first authorized sub-band table configured on the random access code to obtain a target sub-band for transmitting a random access response; meanwhile, the terminal maps the random access code to an available sub-band in a second authorized sub-band table by the same method to obtain a target sub-band for receiving the random access response;
(5) After receiving the random access response sent by the base station through the target sub-band, the terminal acquires a frequency point for information interaction between the base station and the terminal from the random access response, and realizes the information interaction between the base station and the terminal through the frequency point.
Specifically, the method provided in this embodiment configures 3 grant sub-band tables in each terminal, configures one grant sub-band table in the 3 grant sub-band tables in each base station, and includes a base station configured with any one grant sub-band table in the 3 grant sub-band tables in each cell. 480 subbands were grouped into 3 groups of 160 subbands each. The grant sub-band table 1 stores grant sub-bands between sub-band indexes 0 to 159MHz, the grant sub-band table 2 stores grant sub-bands between sub-band indexes 160 to 319MHz, and the grant sub-band table 3 stores grant sub-bands between sub-band indexes 320 to 479MHz, and broadcast sub-bands of one cell must be distributed in different groups. The base station is consistent with the authorization table of the terminal, and each group selects 20 subbands with better channel conditions in 160 subbands.
Each cell transmits at most 3 sets of broadcast information, and each set of broadcast information is transmitted on 3 subbands and corresponds to 3 authorized subband tables one by one. The broadcast information contains 20 bits of access subband information, and the corresponding bit position 1 indicates that the subband is available, and the corresponding bit position 0 indicates that the subband is not available. The correspondence between the grant subband table and the broadcast information is shown in fig. 3.
After the cell search, the UE (terminal) receives broadcast information on the searched broadcast sub-band. After the user initiates random access, the frequency point position for receiving the random access response is calculated according to the access sub-band information in the broadcast information and the selected random access code. The calculation method comprises the following steps:
according to the broadcast configuration, the number of access sub-bands (available sub-bands) corresponding to the current broadcast sub-band is obtained to be Ndaatasb, and assuming that the random access code index is preamble_id, the frequency point position of the random access response is:
MSG2_Position＝preamble_id mod Ndatasb
the access sub-band indicated in the broadcast information is only used for limiting a random access response receiving sub-band of a random access procedure, and after the UE completes the random access procedure, the base station can schedule the UE to perform service in a range of 480 sub-bands by using DCI (Downlink Control Information ).
In the method provided by the embodiment, the UE and the base station respectively configure an authorized subband table, the base station configures available access subbands (access frequency points) in the broadcast information, and the UE selects the access subbands according to the access frequency point indication in the broadcast information. The base station uses two-stage indication, firstly configures an access frequency point in broadcasting, and secondly indicates a specific working frequency point of the UE in downlink control information. By the method, the base station can configure the receiving frequency point of the random access response through the broadcast channels, and in addition, the receiving frequency point is respectively transmitted through 3 broadcast channels, so that the data bearing capacity of single broadcast is reduced.
Fig. 5 shows a block diagram of a base station according to an embodiment of the present invention, referring to fig. 5, the base station according to the present embodiment includes a first acquisition module 501, a transmission module 502 and a first processing module 503, where,
a first obtaining module 501, configured to obtain a first authorized subband table configured in advance, test each subband in the first authorized subband table, and mark an available subband that is not currently interfered;
a sending module 502, configured to generate target broadcast information according to the tag information of the available sub-band, and send the target broadcast information;
a first processing module 503, configured to determine a target subband according to the target broadcast information, the first grant subband table, and the random access code if the random access code sent by the terminal is received, and send a random access response to the terminal through the target subband.
The method of accessing the frequency point under the discrete sub-band corresponding to the base station provided in the above embodiment is not described herein.
The present embodiment provides a base station that tests each subband in a configured first grant subband table, marks available subbands that are not currently interfered, and transmits target broadcast information generated according to the mark information. Before the terminal and the base station interact, the terminal acquires the target broadcast information and sends the selected random access code to the base station, and meanwhile, the base station and the terminal determine a target sub-band for transmitting random access response according to the random access code. After receiving the random access response sent by the base station through the target sub-band, the terminal performs information interaction with the base station according to the sub-band in the random access response. The base station marks available sub-bands in the sub-bands, and determines a target sub-band from the available sub-bands according to the random access code, so that the selected target sub-band can be ensured to be the available sub-band under the condition that the frequency spectrum resource is changed, and successful issuing and receiving of the random access response are ensured.
Fig. 6 shows a block diagram of a terminal according to an embodiment of the present invention, referring to fig. 6, the terminal according to the present embodiment includes a second obtaining module 601, a selecting module 602, and a second processing module 603, where,
the second obtaining module 601 is configured to obtain target broadcast information after receiving an instruction for performing information interaction with a base station, determine a first authorization sub-band table configured at the base station that issues the target broadcast information according to the target broadcast information, and obtain a second authorization sub-band table that is stored in advance and is the same as the first authorization sub-band table;
a selecting module 602, configured to randomly select a random access code from a random access code range corresponding to the second grant subband table;
a second processing module 603, configured to send the random access code to the base station, and determine a target subband according to the target broadcast information, the second grant subband table, and the random access code, and receive the random access response through the target subband.
The method provided by the embodiment of the present invention is applicable to the method provided by the embodiment of the present invention corresponding to the access frequency point under the discrete sub-band of the terminal, and will not be described herein.
The embodiment provides a terminal, before the terminal and a base station interact, the terminal acquires the target broadcast information and sends a selected random access code to the base station, and meanwhile, the base station and the terminal determine a target sub-band for transmitting a random access response according to the random access code. After receiving the random access response sent by the base station through the target sub-band, the terminal performs information interaction with the base station according to the sub-band in the random access response. The base station marks available sub-bands in the sub-bands, and determines a target sub-band from the available sub-bands according to the random access code, so that the selected target sub-band can be ensured to be the available sub-band under the condition that the frequency spectrum resource is changed, and successful issuing and receiving of the random access response are ensured.
Fig. 7 is a schematic diagram showing the physical structure of a base station provided in this embodiment.
Referring to fig. 7, the base station includes: a processor (processor) 701, a memory (memory) 702, a communication interface (Communications Interface) 703, and a bus 704;
wherein,,
the processor 701, the memory 702 and the communication interface 703 complete communication with each other through the bus 704;
the communication interface 703 is used for information transmission between the communication devices of the base station and the terminal device;
the processor 701 is configured to invoke the program instructions in the memory 702 to perform the methods provided in the above method embodiments, for example, including: acquiring a first preset authorized sub-band table, testing each sub-band in the first authorized sub-band table, and marking available sub-bands which are not interfered currently; generating target broadcast information according to the marking information of the available sub-bands, and sending the target broadcast information; and if the random access code sent by the terminal is received, determining a target sub-band according to the target broadcast information, the first authorized sub-band table and the random access code, and sending a random access response to the terminal through the target sub-band.
The present embodiment provides a non-transitory computer-readable storage medium storing computer instructions that cause a computer to perform the methods provided by the above-described method embodiments, for example, including: acquiring a first preset authorized sub-band table, testing each sub-band in the first authorized sub-band table, and marking available sub-bands which are not interfered currently; generating target broadcast information according to the marking information of the available sub-bands, and sending the target broadcast information; and if the random access code sent by the terminal is received, determining a target sub-band according to the target broadcast information, the first authorized sub-band table and the random access code, and sending a random access response to the terminal through the target sub-band.
The present embodiment discloses a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, are capable of performing the methods provided by the above-described method embodiments, for example, comprising: acquiring a first preset authorized sub-band table, testing each sub-band in the first authorized sub-band table, and marking available sub-bands which are not interfered currently; generating target broadcast information according to the marking information of the available sub-bands, and sending the target broadcast information; and if the random access code sent by the terminal is received, determining a target sub-band according to the target broadcast information, the first authorized sub-band table and the random access code, and sending a random access response to the terminal through the target sub-band.
Fig. 8 is a schematic diagram showing the physical structure of a terminal provided in this embodiment.
Referring to fig. 8, the terminal includes: a processor (processor) 801, a memory (memory) 802, a communication interface (Communications Interface) 803, and a bus 804;
wherein,,
the processor 801, the memory 802, and the communication interface 803 complete communication with each other through the bus 804;
The communication interface 803 is used for information transmission between the communication devices of the terminal and the base station;
the processor 801 is configured to invoke program instructions in the memory 802 to perform the methods provided in the above method embodiments, for example, including: after receiving an instruction for information interaction with a base station, acquiring target broadcast information, determining a first authorization sub-band table configured at the base station for issuing the target broadcast information according to the target broadcast information, and acquiring a second authorization sub-band table which is stored in advance and is the same as the first authorization sub-band table; randomly selecting a random access code from a random access code range corresponding to the second authorization sub-band table; and transmitting the random access code to the base station, determining a target sub-band according to the target broadcast information, the second authorized sub-band table and the random access code, and receiving the random access response through the target sub-band.
The present embodiment provides a non-transitory computer-readable storage medium storing computer instructions that cause a computer to perform the methods provided by the above-described method embodiments, for example, including: after receiving an instruction for information interaction with a base station, acquiring target broadcast information, determining a first authorization sub-band table configured at the base station for issuing the target broadcast information according to the target broadcast information, and acquiring a second authorization sub-band table which is stored in advance and is the same as the first authorization sub-band table; randomly selecting a random access code from a random access code range corresponding to the second authorization sub-band table; and transmitting the random access code to the base station, determining a target sub-band according to the target broadcast information, the second authorized sub-band table and the random access code, and receiving the random access response through the target sub-band.
The present embodiment discloses a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, are capable of performing the methods provided by the above-described method embodiments, for example, comprising: after receiving an instruction for information interaction with a base station, acquiring target broadcast information, determining a first authorization sub-band table configured at the base station for issuing the target broadcast information according to the target broadcast information, and acquiring a second authorization sub-band table which is stored in advance and is the same as the first authorization sub-band table; randomly selecting a random access code from the range of the random access codes; and transmitting the random access code to the base station, determining a target sub-band according to the target broadcast information, the second authorized sub-band table and the random access code, and receiving the random access response through the target sub-band.
Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the above method embodiments may be implemented by hardware associated with program instructions, where the foregoing program may be stored in a computer readable storage medium, and when executed, the program performs steps including the above method embodiments; and the aforementioned storage medium includes: various media that can store program code, such as ROM, RAM, magnetic or optical disks.
The embodiments of the physical structure of the terminal or the base station described above are merely illustrative, and the units described as separate units may or may not be physically separated, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the embodiments of the present invention, and are not limited thereto; although embodiments of the present invention have been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A method for discretizing access frequency points under a subband, comprising:
acquiring a first preset authorized sub-band table, testing each sub-band in the first authorized sub-band table, and marking available sub-bands which are not interfered currently;
generating target broadcast information according to the marking information of the available sub-bands, and sending the target broadcast information;
if a random access code sent by a terminal is received, determining a target sub-band according to the target broadcast information, the first authorized sub-band table and the random access code, and sending a random access response to the terminal through the target sub-band;
The obtaining a preconfigured first authorized sub-band table, testing each sub-band in the first authorized sub-band table, marking available sub-bands which are not interfered currently, and the method comprises the following steps:
acquiring a first preset authorized sub-band table, testing each sub-band in the first authorized sub-band table, and judging whether the sub-band is currently interfered or not;
if the sub-band is not interfered currently, the sub-band is an available sub-band, marking is carried out through a first character, otherwise, marking is carried out through a second character;
taking the marked first character and second character as the marking information according to the sequence of the sub-bands in the first authorization sub-band table;
if the random access code sent by the terminal is received, determining a target sub-band according to the target broadcast information, the first authorization sub-band table and the random access code, and sending a random access response to the terminal through the target sub-band, wherein the method comprises the following steps:
if a random access code sent by a terminal is received, calculating a first number of sub-bands marked as the first character according to the target broadcast information, and calculating a remainder of dividing the random access code by the first number;
And selecting a sub-band corresponding to the remainder from sub-bands marked as the first character as the target sub-band corresponding to the first authorized sub-band table, and sending a random access response to the terminal through the target sub-band.
2. A method for discretizing access frequency points under a subband, comprising:
after receiving an instruction for information interaction with a base station, acquiring target broadcast information, determining a first authorization sub-band table configured at the base station for issuing the target broadcast information according to the target broadcast information, and acquiring a second authorization sub-band table which is stored in advance and is the same as the first authorization sub-band table;
randomly selecting a random access code from a random access code range corresponding to the second authorization sub-band table;
transmitting the random access code to the base station, determining a target sub-band according to the target broadcast information, the second authorized sub-band table and the random access code, and receiving a random access response through the target sub-band;
wherein the transmitting the random access code to the base station and determining a target subband according to the target broadcast information, the second grant subband table and the random access code includes:
Transmitting the random access code to the base station, and calculating a first number of subbands marked as a first character according to the target broadcast information, and calculating a remainder of dividing the random access code by the first number;
and selecting a sub-band corresponding to the remainder from sub-bands marked as the first character as the target sub-band corresponding to the second authorized sub-band table, and sending a random access response to a terminal through the target sub-band.
3. The method of claim 2, wherein the obtaining the target broadcast information after receiving the instruction for information interaction with the base station includes:
after receiving the instruction of information interaction with the base station, acquiring broadcast information, and selecting the broadcast information sent by the broadcast channel with the best signal as the target broadcast information.
4. A base station, comprising:
the first acquisition module is used for acquiring a preconfigured first authorized sub-band table, testing each sub-band in the first authorized sub-band table and marking available sub-bands which are not interfered currently;
a sending module, configured to generate target broadcast information according to the marking information of the available sub-band, and send the target broadcast information;
The first processing module is used for determining a target sub-band according to the target broadcast information, the first authorized sub-band table and the random access code if the random access code sent by the terminal is received, and sending a random access response to the terminal through the target sub-band;
wherein, the base station is further configured to:
acquiring a first preset authorized sub-band table, testing each sub-band in the first authorized sub-band table, and judging whether the sub-band is currently interfered or not;
if the sub-band is not interfered currently, the sub-band is an available sub-band, marking is carried out through a first character, otherwise, marking is carried out through a second character;
taking the marked first character and second character as the marking information according to the sequence of the sub-bands in the first authorization sub-band table;
if a random access code sent by a terminal is received, calculating a first number of sub-bands marked as the first character according to the target broadcast information, and calculating a remainder of dividing the random access code by the first number;
and selecting a sub-band corresponding to the remainder from sub-bands marked as the first character as the target sub-band corresponding to the first authorized sub-band table, and sending a random access response to the terminal through the target sub-band.
5. A terminal, comprising:
the second acquisition module is used for acquiring target broadcast information after receiving an instruction for information interaction with the base station, determining a first authorization sub-band table configured at the base station for issuing the target broadcast information according to the target broadcast information, and acquiring a second authorization sub-band table which is pre-stored and is the same as the first authorization sub-band table;
a selecting module, configured to randomly select a random access code from a random access code range corresponding to the second authorization sub-band table;
a second processing module, configured to send the random access code to the base station, determine a target subband according to the target broadcast information, the second grant subband table, and the random access code, and receive a random access response through the target subband;
wherein, the base station is further configured to:
transmitting the random access code to the base station, and calculating a first number of subbands marked as a first character according to the target broadcast information, and calculating a remainder of dividing the random access code by the first number;
and selecting a sub-band corresponding to the remainder from sub-bands marked as the first character as the target sub-band corresponding to the second authorized sub-band table, and sending a random access response to the terminal through the target sub-band.
6. A base station, comprising:
at least one processor, at least one memory, a communication interface, and a bus; wherein,,
the processor, the memory and the communication interface complete the communication with each other through the bus;
the communication interface is used for information transmission between the communication equipment of the base station and the terminal;
the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform the method as recited in claim 1.
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