CN114095959B - PRACH configuration index filtering method and device - Google Patents

PRACH configuration index filtering method and device Download PDF

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Publication number
CN114095959B
CN114095959B CN202111374040.9A CN202111374040A CN114095959B CN 114095959 B CN114095959 B CN 114095959B CN 202111374040 A CN202111374040 A CN 202111374040A CN 114095959 B CN114095959 B CN 114095959B
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subframe
prach
configuration index
prach configuration
format
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CN114095959A (en
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田秀侠
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Ruijie Networks Co Ltd
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Ruijie Networks Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure

Abstract

The embodiment of the application provides a PRACH configuration index filtering method and device, which are used for improving the random access success rate of a terminal. Comprising the following steps: determining a first subframe set corresponding to a subframe containing an uplink U time slot and a second subframe set corresponding to a subframe containing a random S time slot in one system frame in any frame structure; adding subframes which do not belong to the first subframe set and the second subframe set in the system frame to a third subframe set; determining whether at least one subframe corresponding to each PRACH configuration index in the PRACH configuration index set corresponding to any frame structure comprises a subframe in a third subframe set; deleting the first PRACH configuration index subset from the PRACH configuration index set to obtain a first target PRACH configuration index set; wherein, at least one subframe corresponding to the PRACH configuration index contained in the first PRACH configuration index subset contains a subframe in the third subframe set.

Description

PRACH configuration index filtering method and device
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for filtering PRACH configuration indexes.
Background
In the 5G network, the overall procedure of the terminal access network mainly includes five steps of public land mobile network (Public Land Mobile Network, PLMN) and cell selection, random access, radio resource control (Radio Resource Control, RRC) connection establishment, terminal registration (authentication, key interaction and network attached storage (Network Attached Storage, NAS) security activation), and context establishment and protocol data unit (Protocol Data Unit, PDU) session establishment, wherein in the random access process, a terminal Physical Layer (PHY) performs random access by blind detection of a preamble at a corresponding video position according to configuration (e.g., time domain configuration, frequency domain configuration, subcarrier spacing, zero correlation interval, etc.) provided by a base station medium access control Layer (Medium Access Control, MAC), and reporting the detected preamble sequence number to the MAC Layer. The PHY layer can determine whether the terminal has a subsequent access step by blindly detecting the preamble, i.e., if the terminal cannot detect the preamble, the access process is ended and the access fails.
The timing of the PHY for preamble detection is indicated by a physical random access channel (Physical Random Access Channel, PRACH) configuration index, and at present, the main indication mode performs full set configuration according to the Table 6.3.3.2-3 allowable range of the protocol 38.211, however, since the 5G uses multiple application scenarios, the frame structure is flexible (for example, the frame structure such as the mobile 2.6G 2U8D,4.9G 3U1D is moved), and not all the PRACH configuration indexes are applicable to all the frame structures, so that the full set configuration mode will result in lower probability of detecting the preamble by the terminal, and thus lower success rate of random access of the terminal.
Disclosure of Invention
The embodiment of the application provides a PRACH configuration index filtering method, a PRACH configuration index filtering device, electronic equipment and a storage medium, which are used for improving the random access success rate of a terminal.
In a first aspect, a method for filtering a PRACH configuration index of a physical random access channel is provided, where the method includes:
determining a first subframe set corresponding to a subframe containing an uplink U time slot and a second subframe set corresponding to a subframe containing a random S time slot in one system frame in any frame structure;
adding subframes which do not belong to the first subframe set and the second subframe set in the system frame to a third subframe set;
determining whether at least one subframe corresponding to each PRACH configuration index in the PRACH configuration index set corresponding to any frame structure comprises a subframe in the third subframe set; the PRACH configuration index is used for indicating the time slot position of the terminal detection lead code;
deleting a first PRACH configuration index subset from the PRACH configuration index set to obtain a first target PRACH configuration index set; wherein, at least one subframe corresponding to the PRACH configuration index contained in the first PRACH configuration index subset contains a subframe in the third subframe set.
Optionally, after adding the subframes not belonging to the first subframe set and the second subframe set in the system frame to the third subframe set, the method further includes:
according to the requirement of a first PRACH format on the U time slot, determining a first subframe which does not meet the requirement in a first subframe set corresponding to the first PRACH format;
deleting the first subframe from a first subframe set corresponding to the first PRACH format, and adding the first subframe to a third subframe set corresponding to the first PRACH format.
Optionally, if the first PRACH Format is Format0, the method further includes:
and deleting all subframes in a second subframe set corresponding to the Format0 from the second subframe set, and adding all subframes to the third subframe set.
Optionally, if the first PRACH format is FormatC 4 or FormatC2, the method further includes:
determining the symbol ratio contained in one S time slot in any frame structure; wherein, the symbols included in the S slot include an uplink symbol U, a downlink symbol D and a random symbol S;
determining the symbol length of an uplink symbol U corresponding to the S time slot according to the symbol ratio;
Judging whether the symbol length of the uplink symbol U meets the requirement of a first PRACH format on an S time slot or not;
if the symbol length of the uplink symbol U does not meet the requirement of the first PRACH format on the S slot, deleting all subframes in the second subframe set corresponding to the first PRACH format, and adding all subframes to the third subframe set corresponding to the first PRACH format.
Optionally, the method further comprises:
if the symbol length of the uplink symbol U meets the requirement of a first PRACH format on an S time slot, determining a second PRACH configuration index subset corresponding to a subframe in a second subframe set corresponding to the first PRACH format;
determining whether the number of time slots corresponding to each PRACH configuration index in the second PRACH configuration index subset meets the requirement of the first PRACH format on the number of time slots;
and deleting the PRACH configuration index which does not meet the requirement.
Optionally, after the obtaining the first target PRACH configuration index set, the method further includes:
determining a PRACH transmission period corresponding to each PRACH configuration index in the first target PRACH configuration index set;
deleting a third PRACH configuration index subset from the first target PRACH configuration index set to obtain a second target PRACH configuration index set; and the PRACH sending period corresponding to the PRACH configuration index contained in the third PRACH configuration index subset is larger than a preset period.
In a second aspect, there is provided a PRACH configuration index filtering apparatus, the apparatus comprising:
the determining module is used for determining a first subframe set corresponding to a subframe containing an uplink U time slot and a second subframe set corresponding to a subframe containing a random S time slot in one system frame in any frame structure;
a processing module, configured to add subframes in the system frame that do not belong to the first subframe set and the second subframe set to a third subframe set;
the determining module is further configured to determine whether at least one subframe corresponding to each PRACH configuration index in the PRACH configuration index set corresponding to the arbitrary frame structure includes a subframe in the third subframe set; the PRACH configuration index is used for indicating the time slot position of the terminal detection lead code;
the processing module is further configured to delete a first PRACH configuration index subset from the PRACH configuration index set, to obtain a first target PRACH configuration index set; wherein, subframes in the third subframe set are included in subframes corresponding to PRACH configuration indexes included in the first PRACH configuration index subset.
Optionally, the determining module is further configured to:
according to the requirement of a first PRACH format on the U time slot, determining a first subframe which does not meet the requirement in a first subframe set corresponding to the first PRACH format;
The processing module is further configured to:
deleting the first subframe from a first subframe set corresponding to the first PRACH format, and adding the first subframe to a third subframe set corresponding to the first PRACH format.
Optionally, if the first PRACH Format is Format0, the processing module is further configured to:
and deleting all subframes in a second subframe set corresponding to the Format0 from the second subframe set, and adding all subframes to the third subframe set.
Optionally, if the first PRACH format is FormatC 4 or FormatC2, the determining module is further configured to:
determining the symbol ratio contained in one S time slot in any frame structure; wherein, the symbols included in the S slot include an uplink symbol U, a downlink symbol D and a random symbol S;
determining the symbol length of an uplink symbol U corresponding to the S time slot according to the symbol ratio;
judging whether the symbol length of the uplink symbol U meets the requirement of a first PRACH format on an S time slot or not;
the processing module is further configured to:
if the symbol length of the uplink symbol U does not meet the requirement of the first PRACH format on the S slot, deleting all subframes in the second subframe set corresponding to the first PRACH format, and adding all subframes to the third subframe set corresponding to the first PRACH format.
Optionally, the determining module is further configured to:
if the symbol length of the uplink symbol U meets the requirement of a first PRACH format on an S time slot, determining a second PRACH configuration index subset corresponding to a subframe in a second subframe set corresponding to the first PRACH format;
determining whether the number of time slots corresponding to each PRACH configuration index in the second PRACH configuration index subset meets the requirement of the first PRACH format on the number of time slots;
the processing module is further configured to:
and deleting the PRACH configuration index which does not meet the requirement.
Optionally, the determining module is further configured to:
determining a PRACH transmission period corresponding to each PRACH configuration index in the first target PRACH configuration index set;
the processing module is further configured to:
deleting a third PRACH configuration index subset from the first target PRACH configuration index set to obtain a second target PRACH configuration index set; and the PRACH sending period corresponding to the PRACH configuration index contained in the third PRACH configuration index subset is larger than a preset period.
In a third aspect, an electronic device is provided, the electronic device comprising:
a memory for storing program instructions;
And a processor, configured to call the program instructions stored in the memory, and execute the steps included in the method according to any one of the first aspect according to the obtained program instructions.
In a fourth aspect, there is provided a computer readable storage medium storing computer executable instructions for causing a computer to perform the steps comprised by the method of any one of the first aspects.
In a fifth aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the PRACH configuration index filtering method described in the various possible implementations described above.
In this embodiment of the present application, for different frame structures, it may be determined that a first subframe set corresponding to a subframe including an uplink U slot and a second subframe set corresponding to a subframe including a random S slot in one system frame in any frame structure, adding a subframe including neither the first subframe set nor the second subframe set in the system frame to a third subframe set, and then determining whether each PRACH configuration index set corresponding to any frame structure (for example, may also be referred to as a PRACH configuration index total set corresponding to any frame structure) includes a subframe in the third subframe set in at least one subframe corresponding to each PRACH configuration index total set corresponding to any frame structure, where the PRACH configuration index is used to indicate a slot position (i.e., a detection timing) of a terminal detection preamble, deleting a first PRACH configuration index subset from the total set, and obtaining a first target PRACH configuration index set configured for any frame structure; wherein, at least one subframe corresponding to the PRACH configuration index contained in the first PRACH configuration index subset contains a subframe in the third subframe set. If at least one subframe corresponding to a certain PRACH configuration index in the whole set comprises a subframe in the third subframe set, deleting the PRACH configuration index from the whole set.
That is, the present application filters the configured PRACH configuration index for different frame structures, so as to reduce the range of the PRACH configuration index configured to the terminal, and improve the probability that the terminal detects the preamble, thereby improving the success rate of random access of the terminal.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application.
Fig. 1 is a diagram of a frame, subframe, slot, symbol relationship provided in an embodiment of the present application;
fig. 2 is a configuration indication diagram of a frame structure according to an embodiment of the present application;
fig. 3 is a flowchart of a PRACH configuration index filtering method provided in an embodiment of the present application;
fig. 4 is a schematic diagram of PRACH configuration indexes corresponding to Format0 and related information corresponding to each PRACH configuration index provided in the embodiment of the present application;
fig. 5 is a schematic diagram of PRACH configuration indexes corresponding to FormatB4 and related information corresponding to each PRACH configuration index provided in the embodiment of the present application;
fig. 6 is a schematic diagram of PRACH configuration indexes corresponding to FormatC2 and related information corresponding to each PRACH configuration index provided in an embodiment of the present application;
Fig. 7 is a block diagram of a PRACH configuration index filtering device according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of a computer device according to an embodiment of the present invention.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure. Embodiments and features of embodiments in this application may be combined with each other arbitrarily without conflict. Also, while a logical order is depicted in the flowchart, in some cases, the steps depicted or described may be performed in a different order than presented herein.
The terms first and second in the description and claims of the present application and in the above-described figures are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the term "include" and any variations thereof is intended to cover non-exclusive protection. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus. The term "plurality" in the present application may mean at least two, for example, two, three or more, and embodiments of the present application are not limited.
In addition, the term "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. The character "/" herein generally indicates that the associated object is an "or" relationship unless otherwise specified.
For easy understanding, the technical background of the embodiments of the present invention will be described first.
Currently, in order to improve the random access success rate of a terminal, the first scheme is to determine a frame structure and random access time based on received configuration information; determining effective random access time from the random access time according to the frame structure; selecting a target random access opportunity from the effective random access opportunities; and performing random access on the target random access opportunity. The scheme is to analyze the existing configuration of the base station, control the access time of the access terminal, and the received configuration information is still full set configuration, i.e. the probability of the terminal detecting the preamble is still low.
The second scheme is that the base station distributes different uplink access frequencies for terminals with different network slice priorities; the base station sends a system message to the terminal, wherein the system message carries the corresponding relation between the terminals with different network slice priorities and the uplink access frequency; the terminal receives the system message and acquires the corresponding relation; under the condition of triggering uplink competitive random access, the terminal queries the corresponding relation by utilizing own network slice priority to determine own uplink access frequency; the terminal searches the own uplink access frequency and initiates random access in the corresponding cell. The scheme is to configure different uplink access frequencies according to different priorities of network switching, so that the random access success rate of high-priority users is improved.
The third scheme is that the network side allocates random access resources to each terminal according to the characteristic information of the terminal, wherein the random access resources allocated by the terminals with different characteristics are different; the network side sends the random access resource allocation of each terminal. The scheme is to allocate different random access resources for terminals with different characteristics to control terminal behaviors, and the terminal manufacturers and the terminal models are numerous and uncontrollable.
In view of this, the embodiments of the present application provide a method for filtering PRACH configuration indexes, by determining a first subframe set corresponding to a subframe including an uplink Slot (Up Slot) in one system frame in any frame structure and a second subframe set corresponding to a subframe including a random S Slot, adding a subframe which does not belong to the first subframe set or the second subframe set in the system frame to a third subframe set, and then determining whether at least one subframe corresponding to each PRACH configuration index in the PRACH configuration index set corresponding to any frame structure includes a subframe in the third subframe set, if so, deleting the PRACH configuration index from the PRACH configuration index set, that is, deleting a first PRACH configuration index subset from the PRACH configuration index combination, where the PRACH configuration index included in the first PRACH configuration index subset. Therefore, the PRACH configuration index range configured for the terminal can be effectively reduced, so that the probability of detecting the preamble by the terminal is improved, and the random access success rate of the terminal is further improved.
Note that, in the embodiment of the present application, the configuration of the PRACH configuration index (PRACH-configuration index) value follows the protocol 38.211,Table 6.3.3.2-3:Random access configurations for FR1 and unpaired spectrum. The currently supported random access formats include: the full set of prach-configurationIndex configurable for Format0, format B4 and Format C2 is: 0-27; the complete set of the formatc b4 configurable prach-ConfigurationIndex is: 145-168; the full set of FormatC2 configurable prach-configurationindices is: 189-210, the supported frame structure may be any frame structure (e.g., a mobile 2.6G 2U8D,4.9G 3D1U, 1D3U, 7D2U, and telecom 3.5g 10D2U, etc. frame structures).
The following describes a PRACH configuration index filtering method provided in the embodiments of the present application with reference to the accompanying drawings.
First, before describing the PRACH configuration index filtering method provided in the embodiments of the present application, a related description is made of a relation of a frame, a subframe, a slot, a symbol, and a mobile 2.6g2u8d frame structure.
Referring to fig. 1, fig. 1 shows a relationship between frames, subframes, slots, and symbols with a subcarrier interval of 30KHz in the embodiment of the present application, where one system frame (10 ms) includes 10 subframes, one subframe (1 ms) includes 2 slots (slots), and one slot (0.5 ms) includes 14 symbols (symbols).
Taking the frame structure as the mobile 2.6g2u8d as an example, referring to fig. 2 for relevant configuration and indication information of the mobile 2.6g frame structure, it can be seen from fig. 2 that the mobile 2.6g frame structure is configured as a 5ms single period, the ratio of uplink and downlink resources is 2:8, and the frame structure is DDDDDDDSUU. "nrofDownlinkSlots" indicates that the number of downlink slots is 7; "nrofUplinkSlots (number of full uplink slots)" indicates the number of uplink slots 2; the random or unknown (i.e. S) Slot "number of full downlink symbols" indicates that the number of downlink symbols is 6, and "number of full uplink symbols" indicates that the number of uplink symbols is 4, then the number of random symbols is 4, i.e. the symbol ratio between the downlink (D) symbol, the random (S) symbol and the uplink (U) symbol is 6:4:4, and since the 2.6G frame structure is 5ms single period, the frame structure of one system frame (10 ms) is dddddduudddddddduu, and 10 subframes are contained therein, i.e. DD DD DD DS UU DD DD DD DS UU respectively corresponding to subframes 0-9, i.e. subframe 0 is DD, subframe 1 is DD, subframe 2 is DD, subframe 3 is DS, subframe 4 is UU, subframe 5 is DD, subframe 6 is DD, subframe 7 is DD, subframe 8DS is UU.
After introducing the relationships of the frames, subframes, slots, symbols, and the mobile 2.6g2u8d frame structure, please refer to fig. 3, fig. 3 is a flowchart of a PRACH configuration index filtering method in the embodiment of the present application, which is described as follows:
step 301: determining a first subframe set corresponding to a subframe containing an uplink U time slot and a second subframe set corresponding to a subframe containing a random S time slot in one system frame in any frame structure;
in this embodiment, taking the mobile 2.6g2u8d frame structure as an example, subframes including uplink U slots are subframe 4 and subframe 9, subframes including a first subframe set are subframe 4 and subframe 9, subframes including a random S slot are subframe 3 and subframe 8, and subframes including a second subframe set are subframe 3 and subframe 8.
Step 302: adding subframes which do not belong to the first subframe set and the second subframe set in the system frame to a third subframe set;
as described in step 301, the first subframe set includes the subframes 4 and 9, the second subframe set includes the subframes 3 and 8, and therefore, the subframes added to the third subframe set include the subframes 0, 1, 2, 5, 6 and 7, and the subframes included in the third subframe set are the subframes 0, 1, 2, 5, 6 and 7.
Step 303: determining whether at least one subframe corresponding to each PRACH configuration index in the PRACH configuration index set corresponding to any frame structure comprises a subframe in a third subframe set;
the PRACH configuration index is used to indicate a slot position of the preamble detected by the terminal, i.e. a time when the preamble is detected by the terminal. The number of subframes corresponding to one PRACH configuration index may be multiple, that is, the PRACH may be sent on multiple subframes, and if any one of the subframes corresponding to at least one PRACH configuration index belongs to the third subframe set, it is determined that the subframe in the third subframe set is included in the at least one subframe corresponding to the PRACH configuration index. For example, in the mobile 2.6g2u8d frame structure, when PRACH-configuration index=15, subframes corresponding to the PRACH capable of being transmitted are subframe 1 and subframe 6, where both subframe 1 and subframe 6 belong to the third subframe set, and it is determined that at least one subframe corresponding to PRACH-configuration index=15 includes a subframe in the third subframe set; when PRACH-configuration index=4, the subframe corresponding to the PRACH may be transmitted is subframe 9, subframe 9 is a subframe in the first subframe set, and only subframe 9 is the subframe corresponding to PRACH-configuration index=4, that is, no subframe belonging to the third subframe set is in the subframe corresponding to PRACH-configuration index=4, so that at least one subframe corresponding to PRACH-configuration index=4 does not include a subframe in the third subframe set; when PRACH-configuration index=22, the subframes corresponding to the PRACH may be 3, 4, and 9, where subframe 4 and subframe 9 belong to the first subframe set, subframe 3 belongs to the second subframe set, that is, no subframe belonging to the third subframe set in the subframes corresponding to PRACH-configuration index=22, and therefore, at least one subframe corresponding to PRACH-configuration index=22 does not include a subframe in the third subframe set.
Step 304: deleting the first PRACH configuration index subset from the PRACH configuration index set to obtain a first target PRACH configuration index set.
At least one subframe corresponding to the PRACH configuration index included in the first PRACH configuration index subset includes a subframe in the third subframe set, and at least one subframe corresponding to the PRACH-configuration index=15 includes a subframe in the third subframe set in an example in step 303, where the PRACH-configuration index=15 is deleted from the PRACH configuration index set, so as to obtain a first target PRACH configuration index set.
In a possible implementation manner, after adding subframes not belonging to the first subframe set and the second subframe set in the system frame to the third subframe set, the PRACH configuration index may be further filtered according to the requirement of the PRACH format on the U slot, that is, the first subframe not meeting the requirement in the first subframe set corresponding to the first PRACH format is determined, the first subframe is deleted from the first subframe set corresponding to the first PRACH format, and the first subframe is added to the third subframe set corresponding to the first PRACH format, so as to reduce the number of subframes in the first subframe set, and increase the number of subframes in the third subframe set, so as to further reduce the number of PRACH configuration indexes meeting the condition. Because the requirements of different PRACH formats on the U time slots are different, after the PRACH configuration index is further filtered according to the requirements of the PRACH formats on the U time slots, the first subframe sets corresponding to the different PRACH formats may also be different.
As previously mentioned, the currently supported random access formats include: format0, format B4 and Format C2, wherein Format0 requires that there must be two consecutive Uslots, format B4 and Format C2 require that only Uslots be present. For the frame structure DDDDDDDSUU, only the subframes 4 and 9 have U timeslots, and the subframes 4 and 9 are UUs, that is, two consecutive U timeslots, so for the frame structure dddddddddsuu, the subframes 4 and 9 meet the requirements of Format0, format b4 and Format c2 for the U timeslots, that is, the subframes in the first subframe set meet the requirements of Format0, format b4 and Format c2 for the U timeslots, and therefore, the first subframe set does not need to be added to the first subframe in the third subframe set.
For a frame structure dddsu+ddsuu configured as 2.5ms+2.5ms, the frame structure of 10ms is dddsuddsuudddsuu, and the frame structure of 10ms is dddsuddsuu, namely, the frame structure of DD DS UD DS UU DD DS UD DS UU is corresponding to the subframes 0-9 respectively, namely, subframe 0 is DD, subframe 1 is DS, subframe 2 is UD, subframe 3 is DS, subframe 4 is UU, subframe 5 is DD, subframe 6 is DS, subframe 7 is UD, subframe 8 is DS and subframe 9 is UU, and the first subframe set corresponding to the frame structure comprises subframe 2, subframe 4, subframe 7 and subframe 9, wherein, as long as the requirement of two continuous uselot exists, only subframe 4 and subframe 9 meet the requirement of a time slot, the requirement of subframe 2 and subframe 7 is deleted from the first subframe corresponding to the subframe 0, and the subframe 7 corresponding to the time slot of the subframe 4, and the subframe 2 is added to the subframe 2, and the subframe 4 is added to the subframe 2, and the subframe 9 corresponding to the subframe 4 and the subframe 4 in the time slot is not required to the subframe 2, and the subframe 2 is added to the subframe 2 and the subframe 4 corresponding to the subframe 4.
In one possible implementation manner, after subframes not belonging to the first subframe set and the second subframe set in the system frame are added to the third subframe set, the PRACH configuration index may be further filtered according to the requirement of the PRACH format on the S slot (i.e., the requirement on the number of symbols of the uplink symbol U in the S slot), that is, the symbol ratio of the uplink symbol U, the downlink symbol D and the random symbol S included in one S slot in any frame structure is determined, the symbol length (for example, the number of symbols which may also be referred to as the number of symbols of the uplink symbol U) of the uplink symbol U corresponding to one S slot is determined according to the symbol ratio, and whether the number of symbols of the uplink symbol U meets the requirement of the first PRACH format on the number of symbols of the uplink symbol U in the S slot is determined, if the number of symbols of the uplink symbol U does not meet the requirement of the first PRACH format on the number of symbols of the uplink symbol U in the S slot is deleted, and all subframes in the second subframe set are deleted and the deleted subframes are added to the third subframe set. If the number of the uplink symbols U meets the requirement of the first PRACH format on the S slot, determining a second PRACH configuration index subset corresponding to a subframe in the second subframe set corresponding to the first PRACH format, and determining whether the number of slots corresponding to each PRACH configuration index in the second PRACH configuration index subset meets the requirement of the first PRACH format on the number of slots, that is, the number indicated in the column "Number of PRACH slots within a subframe" in the protocol, and deleting the PRACH configuration indexes which do not meet the requirement. Note that, the Format0 needs to be only two consecutive U slots, so S slots are not considered, that is, the PRACH configuration index corresponding to the Format0 is not filtered by the number of symbols of the uplink symbol U in S slots, at this time, all subframes in the second subframe set corresponding to the Format0 are deleted, and the deleted subframes are added to the third subframe set.
As described above, the symbol ratio between the D symbol, the S symbol, and the U symbol of the 2.6G frame structure is 6:4:4, where, since the S symbol can be used as both an uplink symbol and a downlink symbol, there are at most 8U symbols in the frame structure, and the format b4 requires 12U symbols in the S slot, so that the number of the symbols of the uplink symbol U of the S slot in the frame structure does not satisfy the requirement of the format b4 on the number of the symbols of the uplink symbol U in the S slot, it is necessary to delete all subframes in the second subframe set corresponding to the format b4 from the second subframe set, and add the deleted subframes to the third subframe set, where the subframes included in the third subframe set are subframe 0, subframe 1, subframe 2, subframe 3, subframe 5, subframe 6, subframe 7, and subframe 8; and 6U symbols are required in the S slot by the format c2, so that the number of symbols of the uplink symbol U of the S slot in the frame structure meets the requirement of the format b4 on the number of symbols of the uplink symbol U in the S slot, and at this time, it is further required to determine whether the number of slots corresponding to each PRACH configuration index in the second PRACH configuration index subset corresponding to the subframe in the second subframe set corresponding to the format b4 meets the requirement of the format b4 on the number of slots, and delete the PRACH configuration indexes that do not meet the requirement.
In other embodiments, after the first target PRACH configuration index set is obtained, a PRACH transmission period corresponding to each PRACH configuration index in the first target PRACH configuration index set may be determined, and if the transmission period is greater than a preset period, the corresponding PRACH configuration index is deleted from the first target configuration index set, so as to obtain the second target PRACH configuration index set.
In order to better understand the technical solution of the present application, the PRACH configuration index filtering method provided in the present application will be explained below with reference to specific embodiments. All embodiments are described by taking a mobile 2.6G frame structure dddddddduudddddsuu as an example.
Example 1 for Format0
Referring to fig. 4, fig. 4 shows PRACH configuration indexes corresponding to Format0 and related information corresponding to each PRACH configuration index, in which, column 1 is a PRACH configuration index, column 2 is a preamble Format, column 3 is a PRACH transmission period corresponding to x, column y corresponds to a position of a radio frame where a PRACH resource is located in the PRACH period, column 4 is a subframe symbol, column 5 is a starting symbol position, column 6 is a number of PRACH slots in a subframe, column 7 is a time domain PRACH opportunity existing on each RACH slot, column 8 is a duration of each PRACH, and a unit is an OFDM symbol.
In the first step, subframes included in a first subframe set including an uplink U slot in a system frame of the frame structure DDDDDDDSUU are subframe 4 and subframe 9, subframes included in a second subframe set including a random slot are subframe 3 and subframe 8, subframes included in a third subframe set are subframe 0, subframe 1, subframe 2, subframe 5, subframe 6 and subframe 7, and at this time, it can be seen from relevant data of column 4 in the figure that PRACH-configuration index is a subframe in a third subframe set is included in at least one subframe corresponding to 9-11, 14-16, 19, 23, 25-27, i.e., PRACH configuration indexes of PRACH-configuration indexes of 10-11, 14-16, 19, 23, 25-27 are added to the first PRACH configuration index subset;
secondly, as the subframes 4 and 9 are two continuous U time slots, the requirement of Format0 on the U time slots is met, and therefore no processing is carried out on the subframes in the first subframe set;
thirdly, as the Format0 requires that two consecutive U slots are needed, and S slots do not need to be considered, it is necessary to delete subframes in the second subframe set from the second subframe set, and add all the deleted subframes to the third subframe set, that is, delete subframes 3 and 8 from the second subframe set, and add subframes 3 and 8 to the third subframe set, at this time, it can be seen from the figure that at least one subframe corresponding to PRACH-configuration index is 8, 13, 18, 20-22, 24 includes subframe 3 or subframe 8 in the third subframe set, that is, PRACH-configuration index is 8, 13, 18, 20-22, 24;
Fourth, deleting the first PRACH configuration index subset from the PRACH configuration index set (namely, the Format0 configurable total set) to obtain a first target PRACH configuration index set, wherein at the moment, the PRACH-configuration index included in the first target PRACH configuration index set is 0-7, 12 and 17;
in the fifth step, as can be seen from the related data corresponding to the 3 rd column x in the figure, PRACH transmission periods corresponding to the PRACH-configuration index of 0 and 1 are 160ms and 80ms respectively and are greater than a preset period (i.e., 40 ms), so that PRACH configuration indexes of the PRACH-configuration index of 0 and 1 are deleted from the first target PRACH configuration index set to obtain a second target PRACH configuration index set, and at this time, the PRACH-configuration index included in the second target PRACH configuration index set is 2-7, 12 and 17.
Example 2 for Format B4
Referring to fig. 5, fig. 5 is a PRACH configuration index corresponding to format b4 and related information corresponding to each PRACH configuration index, and the meaning represented by each column in the drawing is the same as that of embodiment 1, and will not be described herein.
In the first step, subframes included in a first subframe set including an uplink U slot in a system frame of the frame structure DDDDDDDSUU are subframe 4 and subframe 9, subframes included in a second subframe set including a random slot are subframe 3 and subframe 8, subframes included in a third subframe set are subframe 0, subframe 1, subframe 2, subframe 5, subframe 6 and subframe 7, and at this time, as can be seen from relevant data of column 4 in the figure, at least one subframe corresponding to a PRACH-configuration index of 150, 154-156, 158, 163, 166-168 includes subframes in a third subframe set, i.e., PRACH configuration indexes of PRACH-configuration indexes of 150, 154-156, 158, 163, 166-168 are added to the first PRACH configuration index subset;
Secondly, as the subframes 4 and 9 are two continuous U time slots, the requirement of the Format B4 on the U time slots is met, and therefore no processing is carried out on the subframes in the first subframe set;
thirdly, as the FormatB4 requires that there are 12U symbols in the S slot, and the symbol ratio of the downlink symbol D, the random symbol S and the uplink symbol U in the FormatB4 is 6:4:4, the number of U symbols is at most 8, which does not meet the symbol number requirement of the FormatB4 on the uplink symbol U in the S slot, at this time, it is necessary to delete the subframes in the second subframe set from the second subframe set, and add all the deleted subframes to the third subframe set, that is, delete the subframes 3 and 8 from the second subframe set, and add the subframes 3 and 8 to the third subframe set, at this time, it can be seen from the figure that at least one subframe corresponding to the PRACH-configuration index is 153, 164-165 contains the subframe 3 or the subframe 8 in the third subframe set, that is, PRACH-configuration index is 153, 164-165, and PRACH configuration index is added to the first configuration index subset;
fourth, deleting the first PRACH configuration index subset from the PRACH configuration index set (namely, the configurable total set of Format B4) to obtain a first target PRACH configuration index set, wherein the PRACH-configuration index included in the first target PRACH configuration index set is 145-149, 151-152, 157, 159-162;
In the fifth step, as can be seen from the related data corresponding to the 3 rd column x in the figure, PRACH transmission periods corresponding to the PRACH-configuration indexes 145 and 146 are 160ms and 80ms respectively and are greater than a preset period (i.e., 40 ms), so that PRACH configuration indexes of the PRACH-configuration indexes 145 and 146 are deleted from the first target PRACH configuration index set to obtain a second target PRACH configuration index set, and at this time, the PRACH-configuration indexes included in the second target PRACH configuration index set are 147-149, 151-152, 157, 159-162.
Example 3 for Format C2
Referring to fig. 6, fig. 6 is a PRACH configuration index corresponding to Format C2 and related information corresponding to each PRACH configuration index, and the meaning represented by each column in the figure is the same as that of embodiment 1, and will not be described again here.
In the first step, subframes included in a first subframe set including an uplink U slot in a system frame of the frame structure DDDDDDDSUU are subframe 4 and subframe 9, subframes included in a second subframe set including a random slot are subframe 3 and subframe 8, subframes included in a third subframe set are subframe 0, subframe 1, subframe 2, subframe 5, subframe 6 and subframe 7, and at this time, it can be seen from relevant data of column 4 in the figure that at least one subframe corresponding to the subframe number 4 includes subframes in the third subframe set, i.e., PRACH configuration indexes of PRACH-configuration indexes 194-195, 198, 206, 209-210 are added to the first PRACH configuration index subset;
Secondly, as the subframes 4 and 9 are two continuous U time slots, the requirement of the Format C2 on the U time slots is met, and therefore no processing is carried out on the subframes in the first subframe set;
thirdly, because 6U symbols may be required in the S slot of the format c2, and the symbol ratio of the downlink symbol D, the random symbol S, and the uplink symbol U in the S slot of the format c2 is 6:4:4, the number of U symbols is at most 8, so as to meet the symbol number requirement of the format c2 on the uplink symbol U in the S slot, at this time, it needs to be further determined whether the number of slots corresponding to each PRACH configuration index in the second PRACH configuration index subset corresponding to the subframe in the second subframe set corresponding to the format c2 meets the requirement of the format c2 on the number of slots (i.e. requires to transmit on one slot in one subframe);
fourth, the PRACH-configuration index included in the second RACH configuration index subset is 193, 198, 204, 207-210, and as can be seen from the related data of column 6 in the figure, the PRACH-configuration index is 193, 204, 207-208 and is required to be sent on two slots in one subframe, i.e. the corresponding number of slots is 2, which does not meet the requirement of FormatC2 on the number of slots, so that the PRACH configuration index with the PRACH-configuration index of 193, 204, 207-208 is deleted;
Fifthly, deleting the first PRACH configuration index subset from the PRACH configuration index set (namely, the full set capable of being configured by Format C2) to obtain a first target PRACH configuration index set, wherein at the moment, the PRACH-configuration index included in the first target PRACH configuration index set is 189-192, 196-197, 199-203, 205;
in the fifth step, as can be seen from the related data corresponding to the 3 rd column x in the figure, PRACH transmission periods corresponding to the PRACH-configuration indexes 189 and 190 are 160ms and 80ms respectively, and are greater than a preset period (i.e., 40 ms), so that PRACH configuration indexes of the PRACH-configuration indexes 189 and 190 are deleted from the first target PRACH configuration index set to obtain a second target PRACH configuration index set, and at this time, the PRACH-configuration indexes included in the second target PRACH configuration index set are 191-192, 196-197, 199-203, 205.
After filtering the configurable corpus of Format0, format B4 and Format C2 according to the steps of the foregoing examples 1, 2 and 3, respectively, the results are shown in Table 1:
PRACH Format PRACH configuration index range before filtering PRACH configuration index range after filtering
Format0 0-27 2-7/12/17
FormatB4 145-168 147-149、151-152、157、159-162
FormatC2 189-210 191-192、196-197、199-203、205
TABLE 1
Therefore, after the PRACH configuration index configured for the terminal is filtered by the base station, the probability of detecting the lead code by the terminal can be effectively improved, and the success rate of random access of the terminal is effectively improved.
Based on the same inventive concept, the embodiment of the application provides a PRACH configuration index filtering device, which can realize the functions corresponding to the PRACH configuration index filtering method. The PRACH configuration index filter may be a hardware structure, a software module, or a hardware structure plus a software module. The PRACH configuration index filtering device can be realized by a chip system, and the chip system can be composed of chips, and can also comprise chips and other discrete devices. Referring to fig. 7, the PRACH configuration index filtering apparatus includes a determining module 701 and a processing module 702. Wherein:
a determining module 701, configured to determine a first subframe set corresponding to a subframe including an uplink U slot and a second subframe set corresponding to a subframe including a random S slot in one system frame in any frame structure;
a processing module 702, configured to add subframes in the system frame that do not belong to the first subframe set and the second subframe set to a third subframe set;
the determining module 701 is further configured to determine whether at least one subframe corresponding to each PRACH configuration index in the PRACH configuration index set corresponding to the arbitrary frame structure includes a subframe in the third subframe set; the PRACH configuration index is used for indicating the time slot position of the terminal detection lead code;
The processing module 702 is further configured to delete a first PRACH configuration index subset from the PRACH configuration index set, to obtain a first target PRACH configuration index set; wherein, subframes in the third subframe set are included in subframes corresponding to PRACH configuration indexes included in the first PRACH configuration index subset.
Optionally, the determining module 701 is further configured to:
according to the requirement of a first PRACH format on the U time slot, determining a first subframe which does not meet the requirement in a first subframe set corresponding to the first PRACH format;
the processing module 702 is further configured to:
deleting the first subframe from a first subframe set corresponding to the first PRACH format, and adding the first subframe to a third subframe set corresponding to the first PRACH format.
Optionally, if the first PRACH Format is Format0, the processing module 702 is further configured to:
and deleting all subframes in a second subframe set corresponding to the Format0 from the second subframe set, and adding all subframes to the third subframe set.
Optionally, if the first PRACH format is FormatC 4 or FormatC2, the determining module 701 is further configured to:
Determining the symbol ratio contained in one S time slot in any frame structure; wherein, the symbols included in the S slot include an uplink symbol U, a downlink symbol D and a random symbol S;
determining the symbol length of an uplink symbol U corresponding to the S time slot according to the symbol ratio;
judging whether the symbol length of the uplink symbol U meets the requirement of a first PRACH format on an S time slot or not;
the processing module 702 is further configured to:
if the symbol length of the uplink symbol U does not meet the requirement of the first PRACH format on the S slot, deleting all subframes in the second subframe set corresponding to the first PRACH format, and adding all subframes to the third subframe set corresponding to the first PRACH format.
Optionally, the determining module 701 is further configured to:
if the symbol length of the uplink symbol U meets the requirement of a first PRACH format on an S time slot, determining a second PRACH configuration index subset corresponding to a subframe in a second subframe set corresponding to the first PRACH format;
determining whether the number of time slots corresponding to each PRACH configuration index in the second PRACH configuration index subset meets the requirement of the first PRACH format on the number of time slots;
The processing module 702 is further configured to:
and deleting the PRACH configuration index which does not meet the requirement.
Optionally, the determining module 701 is further configured to:
determining a PRACH transmission period corresponding to each PRACH configuration index in the first target PRACH configuration index set;
the processing module 702 is further configured to:
deleting a third PRACH configuration index subset from the first target PRACH configuration index set to obtain a second target PRACH configuration index set; and the PRACH sending period corresponding to the PRACH configuration index contained in the third PRACH configuration index subset is larger than a preset period.
All relevant contents of each step involved in the foregoing embodiment of the PRACH configuration index filtering method may be cited in the functional description of the functional module corresponding to the PRACH configuration index filtering device in the embodiment of the present application, which is not described herein again.
The division of the modules in the embodiments of the present application is schematically only one logic function division, and there may be another division manner in actual implementation, and in addition, each functional module in each embodiment of the present application may be integrated in one processor, or may exist separately and physically, or two or more modules may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules.
Based on the same inventive concept, the embodiment of the application provides electronic equipment. Referring to fig. 8, the electronic device includes at least one processor 801 and a memory 802 connected to the at least one processor, in this embodiment, a specific connection medium between the processor 801 and the memory 802 is not limited to the embodiment, and in fig. 8, the connection between the processor 801 and the memory 802 is taken as an example by using a bus 800, and the bus 800 is shown in a bold line in fig. 8, and a connection manner between other components is only illustrated by way of illustration and not limitation. Bus 800 may be divided into an address bus, a data bus, a control bus, etc., and is represented by only one thick line in fig. 8 for ease of illustration, but does not represent only one bus or one type of bus.
In the embodiment of the present application, the memory 802 stores instructions executable by the at least one processor 801, and the at least one processor 801 may perform the steps included in the PRACH configuration index filtering method by executing the instructions stored in the memory 802.
The processor 801 is a control center of the electronic device, and may use various interfaces and lines to connect various parts of the entire electronic device, and by executing or executing instructions stored in the memory 802 and invoking data stored in the memory 802, various functions of the electronic device and process the data, thereby performing overall monitoring of the electronic device. Alternatively, the processor 801 may include one or more processing units, and the processor 801 may integrate an application processor that primarily processes operating systems and application programs, etc., with a modem processor that primarily processes wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 801. In some embodiments, processor 801 and memory 802 may be implemented on the same chip, or they may be implemented separately on separate chips in some embodiments.
The processor 801 may be a general purpose processor such as a Central Processing Unit (CPU), digital signal processor, application specific integrated circuit, field programmable gate array or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, and may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present application. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the PRACH configuration index filtering method disclosed in connection with the embodiments of the present application may be directly embodied and performed by a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
Memory 802, as a non-volatile computer-readable storage medium, may be used to store non-volatile software programs, non-volatile computer-executable programs, and modules. The Memory 802 may include at least one type of storage medium, which may include, for example, flash Memory, hard disk, multimedia card, card Memory, random access Memory (Random Access Memory, RAM), static random access Memory (Static Random Access Memory, SRAM), programmable Read-Only Memory (Programmable Read Only Memory, PROM), read-Only Memory (ROM), charged erasable programmable Read-Only Memory (Electrically Erasable Programmable Read-Only Memory), magnetic Memory, magnetic disk, optical disk, and the like. Memory 802 is 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 such. The memory 802 in the embodiments of the present application may also be circuitry or any other device capable of implementing a memory function for storing program instructions and/or data.
By programming the processor 801, the code corresponding to the PRACH configuration index filtering method described in the foregoing embodiment may be cured into the chip, so that the chip can execute the steps of the PRACH configuration index filtering method when running, and how to program the processor 801 is a technology known to those skilled in the art, which is not repeated herein.
Based on the same inventive concept, embodiments of the present application also provide a computer-readable storage medium storing computer instructions that, when run on a computer, cause the computer to perform the steps of the PRACH configuration index filtering method as described above.
In some possible embodiments, aspects of the PRACH configuration index filtering method provided herein may also be implemented in the form of a program product comprising program code for causing a detection device to perform the steps in the PRACH configuration index filtering method according to various exemplary embodiments of the present application described herein above when the program product is run on an electronic device.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims (10)

1. A method for filtering a PRACH configuration index of a physical random access channel, the method comprising:
determining a first subframe set corresponding to a subframe containing an uplink U time slot and a second subframe set corresponding to a subframe containing a random S time slot in one system frame in any frame structure;
adding subframes which do not belong to the first subframe set and the second subframe set in the system frame to a third subframe set;
Determining whether at least one subframe corresponding to each PRACH configuration index in the PRACH configuration index set corresponding to any frame structure comprises a subframe in the third subframe set; the PRACH configuration index is used for indicating the time slot position of the terminal detection lead code;
deleting a first PRACH configuration index subset from the PRACH configuration index set to obtain a first target PRACH configuration index set; wherein, at least one subframe corresponding to the PRACH configuration index contained in the first PRACH configuration index subset contains a subframe in the third subframe set.
2. The method of claim 1, wherein after adding subframes of the system frame that do not belong to the first and second sets of subframes to a third set of subframes, further comprising:
according to the requirement of a first PRACH format on the U time slot, determining a first subframe which does not meet the requirement in a first subframe set corresponding to the first PRACH format;
deleting the first subframe from a first subframe set corresponding to the first PRACH format, and adding the first subframe to a third subframe set corresponding to the first PRACH format.
3. The method of claim 2, wherein if the first PRACH Format is Format0, the method further comprises:
and deleting all subframes in a second subframe set corresponding to the Format0 from the second subframe set, and adding all subframes to the third subframe set.
4. The method of claim 2, wherein if the first PRACH format is format b4 or format c2, the method further comprises:
determining the symbol ratio contained in one S time slot in any frame structure; wherein, the symbols included in the S slot include an uplink symbol U, a downlink symbol D and a random symbol S;
determining the symbol length of an uplink symbol U corresponding to the S time slot according to the symbol ratio;
judging whether the symbol length of the uplink symbol U meets the requirement of a first PRACH format on an S time slot or not;
if the symbol length of the uplink symbol U does not meet the requirement of the first PRACH format on the S slot, deleting all subframes in the second subframe set corresponding to the first PRACH format, and adding all subframes to the third subframe set corresponding to the first PRACH format.
5. The method of claim 4, wherein the method further comprises:
If the symbol length of the uplink symbol U meets the requirement of a first PRACH format on an S time slot, determining a second PRACH configuration index subset corresponding to a subframe in a second subframe set corresponding to the first PRACH format;
determining whether the number of time slots corresponding to each PRACH configuration index in the second PRACH configuration index subset meets the requirement of the first PRACH format on the number of time slots;
and deleting the PRACH configuration index which does not meet the requirement.
6. The method of claim 1, wherein after the obtaining the first set of target PRACH configuration indices, further comprising:
determining a PRACH transmission period corresponding to each PRACH configuration index in the first target PRACH configuration index set;
deleting a third PRACH configuration index subset from the first target PRACH configuration index set to obtain a second target PRACH configuration index set; and the PRACH sending period corresponding to the PRACH configuration index contained in the third PRACH configuration index subset is larger than a preset period.
7. A PRACH configuration index filtering apparatus, the apparatus comprising:
the determining module is used for determining a first subframe set corresponding to a subframe containing an uplink U time slot and a second subframe set corresponding to a subframe containing a random S time slot in one system frame in any frame structure;
A processing module, configured to add subframes in the system frame that do not belong to the first subframe set and the second subframe set to a third subframe set;
the determining module is further configured to determine whether at least one subframe corresponding to each PRACH configuration index in the PRACH configuration index set corresponding to the arbitrary frame structure includes a subframe in the third subframe set; the PRACH configuration index is used for indicating the time slot position of the terminal detection lead code;
the processing module is further configured to delete a first PRACH configuration index subset from the PRACH configuration index set, to obtain a first target PRACH configuration index set; wherein, subframes in the third subframe set are included in subframes corresponding to PRACH configuration indexes included in the first PRACH configuration index subset.
8. The apparatus of claim 7, wherein the determination module is further to:
according to the requirement of a first PRACH format on the U time slot, determining a first subframe which does not meet the requirement in a first subframe set corresponding to the first PRACH format;
the processing module is further configured to:
deleting the first subframe from a first subframe set corresponding to the first PRACH format, and adding the first subframe to a third subframe set corresponding to the first PRACH format.
9. An electronic device, comprising:
a memory for storing program instructions;
a processor for invoking program instructions stored in said memory and for performing the steps comprised in the method according to any of claims 1-6 in accordance with the obtained program instructions.
10. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program comprising program instructions which, when executed by a computer, cause the computer to perform the method of any of claims 1-6.
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