CN111867084B - PRACH resource allocation and indication allocation method, device and equipment - Google Patents
PRACH resource allocation and indication allocation method, device and equipment Download PDFInfo
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Abstract
The invention provides a method, a device and equipment for PRACH resource allocation and indication allocation, which are used for solving the problem that different PRACH resources are not defined for a terminal. The method comprises the following steps: when a terminal executes random access, determining at least one PRACH resource set corresponding to a terminal type from at least two PRACH resource sets configured for different terminal types; and selecting PRACH resources from the determined PRACH resource set. The network side configures at least two PRACH resource sets according to different terminal types; the PRACH resource set configuration is indicated to the terminal for the terminal to use for the initial access phase or random access after RRC connection.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a device for PRACH resource allocation and indication allocation.
Background
The physical random access channel (Physical Random Access Channel, PRACH) is an access channel when a User Equipment (UE) initiates a call, and when the UE initially accesses, the UE transmits a radio resource control (Radio Resource Control, RRC) connection establishment request message on the PRACH channel according to information indicated by the base station, so as to establish an RRC connection. The PRACH is the only way for the user to make initial connection, handover, connection re-establishment, and resume uplink synchronization. The UE achieves uplink access and synchronization with the LTE system through the PRACH.
In a system design of long term evolution (Long Term Evolution, LTE) or New Radio, NR, a plurality of PRACH formats are defined, as shown in tables 1 and 2 for a 5G NR defined PRACH format, where L RA Identify Preamble sequence length, Δf RA Representing subcarrier spacing, N u Representing the Preamble sequence parameters, associated with the OFDM symbols occupied by the Preamble sequence,
for the cyclic prefix CP parameter, typeA and TypeB represent rules for designing Preamble sequences:
TABLE 1
TABLE 2
Among the different PRACH formats, the PRACH format is determined by the CP length, the Preamble sequence length and the repetition number, and the long PRACH format may be used for a large coverage scenario, and the short PRACH format may be used for a scenario with a smaller cell radius.
For the PRACH format of the same length, different subcarrier intervals of the Preamble sequence are used for different doppler shift scenarios, a large subcarrier interval is suitable for large doppler shift, a small subcarrier interval is used for small doppler shift, and for high frequency scenarios, a large doppler configuration is also required.
In satellite communication, the types of terminals have larger difference, and the PRACH format designed by the current LTE or 5G NR system cannot meet the communication requirement of the terminal type with larger difference in the satellite communication scene.
Disclosure of Invention
The embodiment of the invention provides a method, a device and equipment for PRACH resource allocation and indication allocation, which are used for solving the problems that different PRACH resources are not defined for a terminal in the prior art, and the flexibility and the efficiency optimization of resource allocation are not facilitated.
In a first aspect, an embodiment of the present invention provides a method for configuring PRACH resources, which is applied to a terminal, and includes:
when random access is executed, determining at least one PRACH resource set corresponding to the type of the terminal in at least two PRACH resource sets configured for different terminal types, wherein the different PRACH resource sets are in one-to-one correspondence with different PRACH formats;
and selecting PRACH resources from the determined at least one PRACH resource set.
In one possible implementation, determining to perform random access includes:
in the initial access stage, determining to execute random access; or alternatively
After establishing the Radio Resource Control (RRC) connection, when the condition for executing the random access is satisfied, determining to execute the random access.
In one possible implementation manner, determining at least one PRACH resource set corresponding to a type of a terminal from at least two PRACH resource sets configured for different terminal types, includes:
Acquiring at least one PRACH resource set corresponding to the type of a terminal from at least two PRACH resource sets which are indicated by a network side and configured for different terminal types; or alternatively
At least two PRACH resource sets configured for different terminal types are determined, and at least one PRACH resource set corresponding to the type of the terminal is selected from the at least two PRACH resource sets.
In one possible implementation, determining at least two PRACH resource sets configured for different terminal types includes:
receiving at least two physical random access channel PRACH resource sets configured for different terminal types and indicated by a network side through a downlink broadcast signaling of the network side; or alternatively
And determining at least two physical random access channel PRACH resource sets configured for different terminal types by a protocol agreed mode.
In one possible implementation, selecting PRACH resources includes:
in an initial access stage, randomly selecting a PRACH resource from at least one PRACH resource set corresponding to the type of the terminal; or alternatively
After the RRC connection is established, selecting a designated PRACH resource from at least one PRACH resource set corresponding to the type of the terminal according to an indication of the network.
In one possible implementation, the different PRACH formats include any one or more of the following different:
different cyclic prefix CP lengths;
different random access Preamble sequence lengths;
different Preamble repetition times;
different subcarrier spacing.
In one possible implementation, the different terminal types include any one or more of:
different terminal grades;
different terminal capability configurations.
In a second aspect, an embodiment of the present invention provides a method for PRACH resource indication configuration, which is applied to a network side, and includes:
configuring at least two PRACH resource sets according to different terminal types, wherein each PRACH resource set corresponds to the type of the terminal in the at least two PRACH resource sets which are indicated by the configuration of different terminal types, and different PRACH resource sets correspond to different PRACH formats one by one;
and indicating the PRACH resource set configuration to a terminal so that the terminal can be used for carrying out initial access phase or random access after RRC connection.
In one possible implementation, the indicating the PRACH resource set configuration to the terminal includes:
determining at least one PRACH resource set corresponding to the type of a terminal in at least two PRACH resource sets configured for different terminal types, and indicating the PRACH resource set to the terminal; or alternatively
And indicating at least two PRACH resource sets configured for different terminal types to the terminal through downlink broadcast signaling.
In one possible implementation, determining at least two PRACH resource sets configured for different terminal types includes:
and determining at least two PRACH resource sets configured for different terminal types by a protocol agreed mode.
In one possible implementation manner, determining at least one PRACH resource set corresponding to a type of a terminal from at least two PRACH resource sets configured for different terminal types, and indicating the at least one PRACH resource set to the terminal includes:
and reporting the type of the terminal, indicating the PRACH resource set of the terminal by the network side, and distributing PRACH resources for the terminal.
In one possible implementation, the different PRACH formats include any one or more of the following different:
different cyclic prefix CP lengths;
different random access Preamble sequence lengths;
different Preamble repetition times;
different subcarrier spacing.
In one possible implementation, the different terminal types include any one or more of:
different terminal grades;
different terminal capability configurations.
In one possible implementation, the PRACH resource set configuration for different terminal types is determined according to at least one or more of the following related parameters:
the moving speed of the terminal;
the transmission bandwidth of the terminal;
the transmit power of the terminal.
In a third aspect, an embodiment of the present invention provides a terminal for PRACH resource allocation, including:
a processor, a memory, and a communication interface;
wherein the memory stores instructions executable by the processor;
the processor, when executing the instructions, is configured to:
when random access is executed, determining at least one PRACH resource set corresponding to the type of the terminal in at least two PRACH resource sets configured for different terminal types, wherein the different PRACH resource sets are in one-to-one correspondence with different PRACH formats;
and selecting PRACH resources from the determined at least one PRACH resource set.
In one possible implementation, the processor is specifically configured to, when executing the instructions:
in the initial access stage, determining to execute random access; or alternatively
After establishing the Radio Resource Control (RRC) connection, when the condition for executing the random access is satisfied, determining to execute the random access.
In one possible implementation, the processor is specifically configured to, when executing the instructions:
acquiring at least one PRACH resource set corresponding to the type of a terminal from at least two PRACH resource sets which are indicated by a network side and configured for different terminal types; or alternatively
At least two PRACH resource sets configured for different terminal types are determined, and at least one PRACH resource set corresponding to the type of the terminal is selected from the at least two PRACH resource sets.
In one possible implementation, the processor is specifically configured to, when executing the instructions:
receiving at least two physical random access channel PRACH resource sets configured for different terminal types and indicated by a network side through a downlink broadcast signaling of the network side; or alternatively
And determining at least two physical random access channel PRACH resource sets configured for different terminal types by a protocol agreed mode.
In one possible implementation, the processor is specifically configured to, when executing the instructions:
in an initial access stage, randomly selecting a PRACH resource from at least one PRACH resource set corresponding to the type of the terminal; or alternatively
After the RRC connection is established, selecting a designated PRACH resource from at least one PRACH resource set corresponding to the type of the terminal according to an indication of the network.
In one possible implementation, the different PRACH formats include any one or more of the following different:
different cyclic prefix CP lengths;
different random access Preamble sequence lengths;
different Preamble repetition times;
different subcarrier spacing.
In one possible implementation, the different terminal types include any one or more of:
different terminal grades;
different terminal capability configurations.
In a fourth aspect, an embodiment of the present invention provides a network side device configured with PRACH resource indication, including:
a processor, a memory, and a communication interface;
wherein the memory stores instructions executable by the processor;
the processor, when executing the instructions, is configured to:
configuring at least two PRACH resource sets according to different terminal types, wherein each PRACH resource set corresponds to the type of the terminal in the at least two PRACH resource sets which are indicated by the configuration of different terminal types, and different PRACH resource sets correspond to different PRACH formats one by one;
And indicating the PRACH resource set configuration to a terminal so that the terminal can be used for carrying out initial access phase or random access after RRC connection.
In one possible implementation, the processor is specifically configured to, when executing the instructions:
determining at least one PRACH resource set corresponding to the type of a terminal in at least two PRACH resource sets configured for different terminal types, and indicating the PRACH resource set to the terminal; or alternatively
And indicating at least two PRACH resource sets configured for different terminal types to the terminal through downlink broadcast signaling.
In one possible implementation, the processor is specifically configured to, when executing the instructions:
and determining at least two PRACH resource sets configured for different terminal types by a protocol agreed mode.
In one possible implementation, the processor is specifically configured to, when executing the instructions:
and reporting the type of the terminal, indicating the PRACH resource set of the terminal by the network side, and distributing PRACH resources for the terminal.
In one possible implementation, the different PRACH formats include any one or more of the following different:
different cyclic prefix CP lengths;
Different random access Preamble sequence lengths;
different Preamble repetition times;
different subcarrier spacing.
In one possible implementation, the different terminal types include any one or more of:
different terminal grades;
different terminal capability configurations.
In one possible implementation, the PRACH resource set configuration for different terminal types is determined according to at least one or more of the following related parameters:
the moving speed of the terminal;
the transmission bandwidth of the terminal;
the transmit power of the terminal.
In a fifth aspect, an embodiment of the present invention provides an apparatus for PRACH resource allocation, including:
the PRACH resource set determining unit is used for determining at least one PRACH resource set corresponding to the type of the terminal in at least two PRACH resource sets of physical random access channels configured for different terminal types when random access is executed, wherein different PRACH resource sets are in one-to-one correspondence with different PRACH formats;
and the PRACH resource selection unit is used for selecting PRACH resources from the determined at least one PRACH resource set.
In one possible implementation manner, the PRACH resource set determining unit is specifically configured to:
In the initial access stage, determining to execute random access; or alternatively
After establishing the Radio Resource Control (RRC) connection, when the condition for executing the random access is satisfied, determining to execute the random access.
In one possible implementation manner, the PRACH resource set determining unit is specifically configured to:
acquiring at least one PRACH resource set corresponding to a terminal type from at least two PRACH resource sets which are indicated by a network side and configured for different terminal types; or alternatively
At least two PRACH resource sets configured for different terminal types are determined, and at least one PRACH resource set corresponding to the type of the terminal is selected from the at least two PRACH resource sets.
In one possible implementation manner, the PRACH resource set determining unit is specifically configured to:
receiving at least two physical random access channel PRACH resource sets configured for different terminal types and indicated by a network side through a downlink broadcast signaling of the network side; or alternatively
And determining at least two physical random access channel PRACH resource sets configured for different terminal types by a protocol agreed mode.
In one possible implementation manner, the PRACH resource selection unit is specifically configured to:
In an initial access stage, randomly selecting a PRACH resource in at least one PRACH resource set corresponding to the terminal type; or alternatively
After the RRC connection is established, selecting a designated PRACH resource from at least one PRACH resource set corresponding to the type of the terminal according to an indication of the network.
In one possible implementation, the different PRACH formats include any one or more of the following different:
different cyclic prefix CP lengths;
different random access Preamble sequence lengths;
different Preamble repetition times;
different subcarrier spacing.
In one possible implementation, the different terminal types include any one or more of:
different terminal grades;
different terminal capability configurations.
In a sixth aspect, an embodiment of the present invention provides an apparatus for PRACH resource indication configuration, including:
the PRACH resource set configuration unit is used for configuring at least two PRACH resource sets according to different terminal types, configuring at least two PRACH resource sets indicated for different terminal types, wherein each PRACH resource set corresponds to the type of the terminal, and different PRACH resource sets correspond to different PRACH formats one by one;
And the PRACH resource set indicating unit is used for indicating the PRACH resource set configuration to the terminal so that the terminal can be used for carrying out the initial access stage or the random access after the RRC connection.
In one possible implementation manner, the PRACH resource set indication unit is specifically configured to:
determining at least one PRACH resource set corresponding to the type of a terminal in at least two PRACH resource sets configured for different terminal types, and indicating the PRACH resource set to the terminal; or alternatively
And indicating at least two PRACH resource sets configured for different terminal types to the terminal through downlink broadcast signaling.
In one possible implementation manner, the PRACH resource set indication unit is specifically configured to:
and determining at least two PRACH resource sets configured for different terminal types by a protocol agreed mode.
In one possible implementation manner, the PRACH resource set indication unit is specifically configured to:
and reporting the type of the terminal, indicating the PRACH resource set of the terminal by the network side, and distributing PRACH resources for the terminal.
In one possible implementation, the different PRACH formats include any one or more of the following different:
different cyclic prefix CP lengths;
Different random access Preamble sequence lengths;
different Preamble repetition times;
different subcarrier spacing.
In one possible implementation, the different terminal types include any one or more of:
different terminal grades;
different terminal capability configurations.
In one possible implementation manner, the PRACH resource set indication unit is specifically configured to:
determining PRACH resource set configurations for different terminal types according to at least one or more of the following related parameters:
the moving speed of the terminal;
the transmission bandwidth of the terminal;
the transmit power of the terminal.
In a seventh aspect, embodiments of the present invention provide a computer readable storage medium storing computer instructions that, when run on a computer, cause the computer to perform the method of the first or second aspect of embodiments of the present invention.
One or more technical solutions provided in the embodiments of the present invention at least have the following technical effects or advantages:
the invention is configured for at least two PRACH resource sets of different terminal types, can realize that different types of terminals use resources in different PRACH resource sets, and can carry out customized design for specific terminal types because different PRACH resource sets correspond to different PRACH parameters, thereby being beneficial to improving the efficiency and the flexibility of PRACH resource configuration and preventing one PRACH resource set from being applied to all terminals to increase the complexity and reduce the efficiency of system design.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it will be apparent that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a system for PRACH resource allocation according to a first embodiment of the present invention;
fig. 2 is a schematic diagram of a method for configuring and indicating PRACH resources according to a second embodiment of the present invention;
fig. 3A is a schematic diagram of a PRACH format according to a second embodiment of the present invention;
fig. 3B is a schematic diagram of a PRACH format according to a second embodiment of the present invention;
fig. 4 is a schematic diagram of a method for configuring and indicating PRACH resources according to a third embodiment of the present invention;
fig. 5 is a schematic diagram of a method for PRACH resource allocation according to a fourth embodiment of the present invention;
fig. 6 is a schematic diagram of a method for PRACH resource indication configuration according to a fourth embodiment of the present invention;
fig. 7 is a schematic structural diagram of a terminal for PRACH resource allocation according to a fifth embodiment of the present invention;
Fig. 8 is a schematic structural diagram of a network side device configured with PRACH resource indication according to a fifth embodiment of the present invention;
fig. 9 is a schematic structural diagram of an apparatus for PRACH resource allocation according to a sixth embodiment of the present invention;
fig. 10 is a schematic structural diagram of an apparatus for PRACH resource indication configuration according to a sixth embodiment of the present invention.
Detailed Description
The following detailed description of the technical solutions of the present invention will be given by way of the accompanying drawings and specific embodiments, and it should be understood that the specific features of the embodiments and embodiments of the present invention are detailed descriptions of the technical solutions of the present invention, and not limiting the technical solutions of the present invention, and that the embodiments and technical features of the embodiments of the present invention may be combined with each other without conflict.
It should be appreciated that in the description of embodiments of the invention, the words "first," "second," and the like are used merely for distinguishing between the descriptions and not for indicating or implying any relative importance or order. In the description of the embodiments of the present invention, "plurality" means two or more.
The term "and/or" in the embodiment of the present invention is merely an association relationship describing the association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
The embodiment of the invention can be applied to a 5G system; it is also applicable to other wireless communication systems, such as long term evolution (Long Term Evolution, LTE) systems, global system for mobile communications (Global System for Mobile Communication, GSM), mobile communication systems (Universal Mobile Telecommunications System, UMTS), code division multiple access (Code Division Multiple Access, CDMA) systems, and new network equipment systems.
The UE according to the embodiment of the present invention may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing device connected to a wireless modem. The wireless user terminals may communicate with one or more core networks via a radio access network (Radio Access Network, RAN), which may be mobile terminals such as mobile phones (or "cellular" phones) and computers with mobile terminals, e.g., portable, pocket, hand-held, computer-built-in or vehicle-mounted mobile devices that exchange voice and/or data with the radio access network. Such as personal communication services (Personal Communication Service, PCS) phones, cordless phones, session Initiation Protocol (SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital assistants (Personal Digital Assistant, PDA) and the like. A wireless User Terminal may also be referred to as a system, subscriber Unit (Subscriber Unit), subscriber Station (Subscriber Station), mobile Station (Mobile Station), mobile Station (Mobile), remote Station (Remote Station), access Point (Access Point), remote Terminal (Remote Terminal), access Terminal (Access Terminal), user Terminal (User Terminal), user Agent (User Agent), user Device.
The base station according to the embodiments of the present invention may be configured to mutually convert a received air frame and an IP packet as a router between a wireless terminal device and the rest of an access network, where the rest of the access network may include an Internet Protocol (IP) network device. The base station may also coordinate attribute management for the air interface. For example, the base station may be a network device in a 5G system, a next generation base station (Next generation Node B, gNB), a base station (Base Transceiver Station, BTS) in a global system for mobile communications (Global System for Mobile Communication, GSM) or code division multiple access (Code Division Multiple Access, CDMA), a base station (NodeB) in wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA), or an evolved base station (evolutional Node B, eNB or e-NodeB) in LTE, which is not limited in the embodiments of the present invention.
In the design of New wireless air interface (NR) systems of long term evolution (Long Term Evolution, LTE) and fifth generation (5 th-generation, 5G), channel formats of multiple physical random access channels (Physical Random Access Channel, PRACH) are defined and applied to different scenarios.
The existing LTE or NR system does not define different PRACH formats for different terminals, so it is impossible to customize different PRACH formats for terminals at the time of initial access, and in a satellite communication system, the radius of a cell is usually large, and the types of terminals are also many, including a handheld terminal, a vehicle-mounted terminal, an airplane, and the like. Since the types of terminals in satellite systems are too different, if only one PRACH channel format is configured, the flexibility and efficiency of system resource allocation are not optimized.
The terminal moving speed is an important factor affecting the design of the PRACH format, and a larger moving speed causes a larger doppler shift, thus requiring a larger subcarrier spacing. For a handheld or vehicle-mounted terminal, the terminal moving speed is not particularly high, and the subcarrier spacing of the PRACH can be configured to be smaller because the Doppler frequency shift is relatively smaller; for high-speed terminals such as airplanes or high-speed rails, the moving speed is high, and the PRACH transmission bandwidth can be configured to be larger because the transmission power is not limited, and the subcarrier interval also needs to be configured to be larger because the Doppler shift is larger.
Meanwhile, as different terminals have different transmission power capacities, the larger the transmission power is, the larger PRACH transmission bandwidth can be supported. The smaller the transmission power is, the PRACH resource set with more Preamble repetition times needs to be selected preferentially so as to increase the probability of successful connection; the larger the supported transmission bandwidth, the longer the Preamble sequence length is supported.
Based on this, for different types of terminals, different PRACH formats need to be configured to support random access of the terminals. However, at the initial access, the network does not know the type of the terminal, so the terminal needs to select a proper PRACH resource to access the network according to the terminal type of the terminal.
Based on the above problems, the embodiment of the invention provides a method for configuring PRACH resources and indicating configuration, which can support terminals of different types to select proper PRACH resources to access a network, and improve the flexibility and efficiency of a system.
Embodiments of the invention are described in further detail below with reference to the drawings.
Example 1
Referring to fig. 1, an embodiment of the present invention provides a system for PRACH resource allocation, where the system includes a network side device 101 and a terminal 102, where:
the network side device 101 is configured to configure at least two PRACH resource sets according to different terminal types, and configure at least two PRACH resource sets indicated for different terminal types, where each PRACH resource set corresponds to a terminal type, and different PRACH resource sets correspond to different PRACH formats one by one; indicating the PRACH resource set configuration to a terminal so that the terminal can be used for carrying out an initial access stage or random access after RRC connection;
A terminal 102, configured to determine, when performing random access, at least one PRACH resource set corresponding to a terminal type from at least two PRACH resource sets configured for different terminal types, where different PRACH resource sets are in one-to-one correspondence with different PRACH formats; and selecting PRACH resources from the determined at least one PRACH resource set.
Different PRACH resource sets are in one-to-one correspondence with different PRACH formats, that is, one PRACH resource set corresponds to one PRACH format only, one PRACH resource set includes a plurality of different PRACH resources using the PRACH format, the different PRACH resources use the same PRACH format, and different resources are distinguished by different content elements, such as different random access preambles. The embodiment of the invention can define different random access preamble or cyclic prefix CP for each PRACH resource set.
The components of the PRACH format include a cyclic prefix CP, a Preamble sequence and a guard interval GT, where the CP length, the Preamble sequence length, the repetition number, and the subcarrier interval are used as parameters describing the PRACH format, and different PRACH formats in the embodiment of the present invention refer to a plurality of PRACH formats with any one or any multiple of the parameters being different.
As an alternative embodiment, the different PRACH formats described above include any one or more of the following different:
different cyclic prefix CP lengths;
different random access Preamble sequence lengths;
different Preamble repetition times;
different subcarrier spacing.
As an alternative embodiment, the above-mentioned different terminal types include any one or more of the following:
different terminal grades;
different terminal capabilities.
The class of the terminal may be defined by a class parameter of the terminal, e.g., the terminal may be defined by a mobile characteristic or a terminal power or the like.
The capabilities of the terminal may be defined by a capability parameter of the terminal, for example, the effective global radiated power EIRP and the terminal transmission bandwidth may be transmitted by the terminal of the terminal.
For different terminal types, the network side equipment can determine one or more relevant parameters influencing the PRACH format selection, and configure at least two available PRACH formats of different terminal types according to the one or more relevant parameters influencing the PRACH format selection, so as to obtain PRACH resource set configuration.
In practice, the PRACH resource set configuration for different terminal types may be determined according to at least one or more of the following related parameters:
The moving speed of the terminal;
the transmission bandwidth of the terminal;
the transmit power of the terminal.
Specifically, the movement speed range of the terminal may be determined according to the movement characteristics in the class parameter of the terminal, the transmission power of the terminal may be determined according to the terminal power in the class parameter of the terminal, and the supported bandwidth may be estimated according to the transmission power of the terminal. The transmission power of the terminal can also be determined according to the terminal transmission EIRP in the capability configuration of the terminal, and the bandwidth of the terminal can be determined according to the terminal transmission bandwidth in the capability configuration of the terminal.
After the network side device determines the one or more related parameters, the PRACH format meeting the requirements of the terminal is configured according to the design requirements of the parameters on the PRACH format, as mentioned above, the speed of the terminal is about, the larger the required subcarrier interval is, the wider the transmission bandwidth can support the longer Preamble sequence length, the smaller the transmission power is, and the PRACH format with more Preamble repetition times is preferentially used. In particular, in the PRACH format, a plurality of parameters may be comprehensively considered to configure a corresponding PRACH format.
As an optional implementation manner, the network side device may perform PRACH resource configuration by adopting any one or more steps, after performing the steps, the PRACH format may be configured according to one parameter, and then further adjusted according to another parameter on the basis, or the PRACH format required by the parameters may be configured directly by taking the parameters into consideration, and directly by one step.
Step 1, configuring at least one PRACH format respectively adaptive to the moving speeds of different types of terminals;
the subcarrier spacing is suitable for different Doppler shift scenes, the large subcarrier spacing is suitable for large Doppler shift, the small subcarrier spacing is used for small Doppler shift, and the terminal with high moving speed can lead to larger Doppler shift, so that the PRACH format with large subcarrier spacing is suitable for the terminal with high moving speed, the PRACH format with small subcarrier spacing is suitable for the terminal with low moving speed, and the limit for defining the moving speed of the terminal is not limited.
Step 2, configuring at least one PRACH format respectively matched with the transmission bandwidths of different types of terminals;
for a terminal with a small transmission bandwidth, in order to make the bandwidth occupied by the PRACH signal small, a shorter random access Preamble sequence length may be used, and the limit defining the size of the transmission bandwidth of the terminal is not limited here.
And 3, configuring at least one PRACH format respectively adaptive to the transmission power of the terminals of different types.
For a terminal with low transmission power, to ensure the success rate of random access, the PRACH format with more Preamble repeated transmission times is preferentially used, meanwhile, because the transmission power is low, the signal to noise ratio from the PRACH signal to the receiving end is lower, and to compensate the signal to noise ratio, the PRACH format is carried out by using a longer random access Preamble sequence length based on the two requirements, so that the configured PRACH format can not only improve the receiving gain, but also compensate the signal to noise ratio.
In this embodiment, the terminal determines at least one PRACH resource set corresponding to the type of the terminal, which may, but is not limited to, adopt any of the following manners:
1) Acquiring at least one PRACH resource set corresponding to a terminal type from at least two PRACH resource sets which are indicated by network side equipment and configured for different terminal types;
the network side equipment selects at least one PRACH resource set corresponding to the type of the terminal from at least two PRACH resource sets configured for different terminal types by the network side equipment according to the type of the terminal, and indicates the PRACH resource set to the terminal.
The network side device can determine the type of the terminal according to the type reported by the terminal.
The network side equipment can determine the applicable terminal type of each PRACH resource set according to at least two PRACH resource sets configured for different terminal types, so that according to the type reported by the terminal, the network side equipment selects at least one PRACH resource set applicable to the terminal type according to at least two PRACH resource sets configured for different terminal types.
2) Determining at least two PRACH resource sets configured for different terminal types, and selecting at least one PRACH resource set corresponding to the type of the terminal from the at least two PRACH resource sets;
Namely, according to the self type, the terminal selects at least one PRACH resource set corresponding to the self type from at least two PRACH resource sets configured for different terminal types by the network side equipment.
The terminal can determine the applicable terminal type of each PRACH resource set according to at least two PRACH resource sets configured for different terminal types by the terminal, so that at least one PRACH resource set applicable to the type of the terminal is selected from at least two PRACH resource sets configured for different terminal types by the network side equipment according to the type of the terminal.
As an optional implementation manner, the terminal determines at least two PRACH resource sets configured for different terminal types, and receives at least two physical random access channel PRACH resource sets configured for different terminal types indicated by the network side device through downlink broadcast signaling of the network side device;
the network side equipment indicates at least two physical random access channel PRACH resource sets configured for different terminal types by the network side equipment to the terminal through downlink broadcast signaling.
As another alternative embodiment, at least two sets of physical random access channel PRACH resources configured for different terminal types are determined by means of protocol conventions.
The terminal and the network side equipment agree in advance on at least two physical random access channel PRACH resource sets configured by the network side equipment for different terminal types through a protocol.
As an alternative embodiment, PRACH resources are selected from the determined at least one PRACH resource set, including the following two cases:
a) In an initial access stage, randomly selecting a PRACH resource in at least one PRACH resource set corresponding to the terminal type;
that is, the terminal randomly selects any one PRACH resource from at least one PRACH resource set corresponding to its own type.
B) After the RRC connection is established, selecting designated PRACH resources from at least one PRACH resource set corresponding to the type of the terminal according to the indication of the network side equipment.
Namely, the network side equipment selects a designated PRACH resource to indicate to the terminal in at least one PRACH resource set corresponding to the type of the terminal.
Since the distance between the terminal and the network is uncertain due to the movement of the terminal, if the terminal needs to send a message to the network, maintenance management of uplink synchronization must be performed in real time. The PRACH is to establish the uplink synchronization relationship with the network and request the network to allocate the special resources to the terminal through the random access process for normal service transmission.
The above random access execution includes the following two scenarios:
a) Random access in initial access stage;
in the initial access phase, the terminal goes from an idle state to an RRC connected state by performing random access.
b) After the RRC connection is established, random access satisfying the condition for performing random access.
The condition for performing random access in the RRC connected state may be:
the RRC connection reestablishment procedure is required;
cell switching is needed, so that uplink synchronization is established with a new cell through a random access terminal;
when the downlink data arrives, the uplink is in an 'unsynchronized' state, so that uplink synchronization is established by initiating random access;
when uplink data arrives, the uplink is in an 'unsynchronized' state or no available physical uplink control channel resource PUCCH is used for full service route SR transmission, thereby establishing uplink synchronization by initiating random access.
The following describes the PRACH resource configuration and the scheme of PRACH resource configuration indication in different scenarios in two embodiments respectively.
Example two
Referring to fig. 2, for scenario a) in the first embodiment, an embodiment of the present invention provides a method for PRACH resource allocation in an initial access stage, including:
Step 201, the network side equipment configures at least two physical random access channel PRACH resource sets for different terminal types;
taking terminal class distinction as an example, as shown in table 3, the terminal types are classified into the following two types according to terminal class, wherein terminal class 1 and terminal class 2 respectively correspond to different terminal types:
| terminal grade | Speed of movement | Terminal transmission power |
| Terminal class 1 | Low speed movement of less than 120km/h | Lower level |
| Terminal class 2 | High-speed movement, more than 1000km/h | Higher height |
TABLE 3 Table 3
For a terminal with a terminal type of terminal class 1, the Doppler frequency shift is smaller due to the relatively lower moving speed, and the required subcarrier interval can be smaller, so that the subcarrier interval can be configured to be 5khz, the power is lower due to the fact that the terminal is a handheld terminal or a vehicle-mounted terminal, the signal to noise ratio to a receiving end is lower, and the lower signal to noise ratio can be compensated by adopting a 839 sequence;
for a terminal with a terminal type of terminal class 2, the terminal is generally installed on an airplane, because the moving speed is relatively high, the Doppler frequency shift is larger, and the required subcarrier interval can be larger, so that the terminal can be configured to be a subcarrier interval of 60khz, 139 sequences are used for making the bandwidth occupied by PRACH smaller, and the frequency of repetition is more than 6 times, so that the spreading gain of a short sequence can be compensated.
Referring to fig. 3A and 3B, for the above type of terminal, PRACH resource sets of two formats are configured in advance for the above type of terminal as set 1 and set 2, respectively.
Each configured resource set contains 64 Preamble sequences, wherein set 1 corresponds to a subcarrier interval of 5khz, and a Preamble sequence with a length of 839 is adopted, and the repetition number of the Preamble is 2; set 2 corresponds to a subcarrier spacing of 60khz, and adopts 139 long Preamble sequences, and the Preamble repetition number is 6.
In the above steps, another terminal class is classified according to the data transmission rate of the terminal, for example, a low rate terminal means a smaller transmission bandwidth, a smaller transmission power, and a high rate terminal means a larger transmission bandwidth, and a larger transmission power. The specific partitioning is shown in table 4.
| Terminal grade | Rate of speed | Terminal transmission power |
| Terminal class 1 | Data rate 2 Mbps | Lower level |
| Terminal class 2 | Data rate 200Mbps | Higher height |
TABLE 4 Table 4
Thus, for low rate terminals, a Preamble sequence of length 139 may be used due to the smaller bandwidth. For high rate terminals, preamble sequences with length 839 may be used due to the larger bandwidth.
Further, the division of the terminal types may be further divided from the terminal capabilities. Terminal capability is a more specific division of terminal types, and may be from the transmission/reception bandwidth of the terminal, the transmission power, the data processing capability of the terminal, the antenna gain of the terminal, the effective EIRP of the terminal, etc. The terminal capability needs to inform the network at initial access. One specific example is as follows:
TABLE 5
Obviously, since the terminal capability represents a certain characteristic of the terminal, different PRACH resource sets can be allocated according to the capabilities of different terminals.
Step 202, the terminal determines to execute random access;
step 203, the network side device indicates to the terminal at least two physical random access channel PRACH resource sets configured for different terminal types through downlink broadcast signaling;
step 204, the terminal selects at least one PRACH resource set corresponding to the type of the terminal from at least two PRACH resource sets configured by the network side equipment for different terminal types according to the type of the terminal;
if the terminal type is terminal grade 1, selecting a set 1 from at least two physical random access channel PRACH resource sets configured by the network side equipment for different terminal types.
In step 205, the terminal randomly selects one PRACH resource from the at least one PRACH resource set.
Example III
Referring to fig. 4, in view of scenario b) in the first embodiment, an embodiment of the present invention provides a method for PRACH resource allocation after RRC connection establishment, including:
step 401, configuring at least two physical random access channel PRACH resource sets for different terminal types by network side equipment;
the specific configuration method refers to the methods described in the first and second embodiments, and will not be described herein.
Step 402, when the condition of executing random access is satisfied, determining to execute random access;
the condition for performing random access may be:
the RRC connection reestablishment procedure is required;
cell switching is needed, so that uplink synchronization is established with a new cell through a random access terminal;
when the downlink data arrives, the uplink is in an 'unsynchronized' state, so that uplink synchronization is established by initiating random access;
when uplink data arrives, the uplink is in an 'unsynchronized' state or no available physical uplink control channel resource PUCCH is used for full service route SR transmission, thereby establishing uplink synchronization by initiating random access.
Step 403, according to the terminal type reported by the received terminal, the network side device selects at least one PRACH resource set corresponding to the type of the terminal from at least two PRACH resource sets configured by the network side device for different terminal types, wherein the terminal type comprises the grade or the terminal capability identifier of the terminal;
in step 404, the network side device designates a PRACH resource from the at least one PRACH resource set to the terminal.
After the RRC connection is established, since the network side device already knows the terminal class or terminal capability of the terminal, a specific PRACH resource set may be allocated, and non-competitive resources, i.e. different users may get different resource indexes, and may not collide and collide with each other.
Example IV
Based on the same inventive concept, please refer to fig. 5, an embodiment of the present invention provides a method for PRACH resource allocation, which is applied to a terminal, and includes:
step 501, determining at least one PRACH resource set corresponding to a terminal type from at least two PRACH resource sets configured for different terminal types when random access is executed, wherein different PRACH resource sets are in one-to-one correspondence with different PRACH formats;
Step 502, selecting PRACH resources from the determined at least one PRACH resource set.
As an alternative embodiment, determining to perform random access includes:
in the initial access stage, determining to execute random access; or alternatively
After establishing the Radio Resource Control (RRC) connection, when the condition for executing the random access is satisfied, determining to execute the random access.
As an optional implementation manner, determining at least one PRACH resource set corresponding to a terminal type from at least two PRACH resource sets configured for different terminal types, including:
acquiring at least one PRACH resource set corresponding to a terminal type from at least two PRACH resource sets which are indicated by a network side and configured for different terminal types; or alternatively
At least two PRACH resource sets configured for different terminal types are determined, and at least one PRACH resource set corresponding to the type of the terminal is selected from the at least two PRACH resource sets.
As an optional implementation manner, determining at least two PRACH resource sets configured for different terminal types includes:
receiving at least two physical random access channel PRACH resource sets configured for different terminal types and indicated by a network side through a downlink broadcast signaling of the network side; or alternatively
And determining at least two physical random access channel PRACH resource sets configured for different terminal types by a protocol agreed mode.
As an alternative embodiment, selecting PRACH resources includes:
in an initial access stage, randomly selecting a PRACH resource in at least one PRACH resource set corresponding to the terminal type; or alternatively
After the RRC connection is established, selecting a designated PRACH resource from at least one PRACH resource set corresponding to the type of the terminal according to an indication of the network.
As an alternative embodiment, the different PRACH formats include any one or more of the following different:
different cyclic prefix CP lengths;
different random access Preamble sequence lengths;
different Preamble repetition times;
different subcarrier spacing.
As an alternative embodiment, the different terminal types include any one or more of:
different terminal grades;
different terminal capability configurations.
The specific implementation manner of the operations performed by the above methods may refer to the specific implementation manner of the PRACH resource allocation and the terminal in the instruction allocation system in the embodiment of the present application when performing the corresponding operations, which is not described in detail in the embodiment of the present application.
Based on the same inventive concept, please refer to fig. 6, the embodiment of the present invention further provides a method for PRACH resource indication configuration, which is applied to a network side and includes:
step 601, configuring at least two PRACH resource sets according to different terminal types, wherein each PRACH resource set corresponds to a terminal type in the at least two PRACH resource sets indicated by the configuration of the different terminal types, and the different PRACH resource sets correspond to different PRACH formats one by one;
step 602, indicating the PRACH resource set configuration to a terminal, so that the terminal is used for performing an initial access phase or random access after RRC connection.
As an optional implementation manner, the indicating the PRACH resource set configuration to the terminal includes:
determining at least one PRACH resource set corresponding to the type of a terminal in at least two PRACH resource sets configured for different terminal types, and indicating the PRACH resource set to the terminal; or alternatively
And indicating at least two PRACH resource sets configured for different terminal types to the terminal through downlink broadcast signaling.
As an optional implementation manner, determining at least two PRACH resource sets configured for different terminal types includes:
And determining at least two PRACH resource sets configured for different terminal types by a protocol agreed mode.
As an optional implementation manner, determining at least one PRACH resource set corresponding to the type of the terminal from at least two PRACH resource sets configured for different terminal types, and indicating the at least one PRACH resource set to the terminal includes:
and reporting the type of the terminal, indicating the PRACH resource set of the terminal by the network side, and distributing PRACH resources for the terminal.
As an alternative embodiment, the different PRACH formats include any one or more of the following different:
different cyclic prefix CP lengths;
different random access Preamble sequence lengths;
different Preamble repetition times;
different subcarrier spacing.
As an alternative embodiment, the different terminal types include any one or more of:
different terminal grades;
different terminal capability configurations.
As an alternative embodiment, the PRACH resource set configuration of different terminal types is determined according to at least one or more of the following related parameters:
the moving speed of the terminal;
the transmission bandwidth of the terminal;
the transmit power of the terminal.
The specific implementation manner of the operations performed by the above methods may refer to the specific implementation manner of the PRACH resource allocation and the network side device in the instruction allocation system in the embodiment of the present application when performing the corresponding operations, which are not described in detail in the embodiment of the present application.
Example five
Based on the same inventive concept, please refer to fig. 7, an embodiment of the present invention provides a terminal for PRACH resource allocation, which includes:
a processor 701, a memory 702, and a communication interface 703;
wherein the memory 702 stores instructions executable by the processor 701;
the processor 701, when executing the instructions, is configured to:
when random access is executed, determining at least one PRACH resource set corresponding to the type of the terminal in at least two PRACH resource sets configured for different terminal types, wherein the different PRACH resource sets are in one-to-one correspondence with different PRACH formats;
and selecting PRACH resources from the determined at least one PRACH resource set.
In one possible implementation, the processor 701 is specifically configured to, when executing the instructions:
in the initial access stage, determining to execute random access; or alternatively
After establishing the Radio Resource Control (RRC) connection, when the condition for executing the random access is satisfied, determining to execute the random access.
In one possible implementation, the processor 701 is specifically configured to, when executing the instructions:
acquiring at least one PRACH resource set corresponding to the type of a terminal from at least two PRACH resource sets which are indicated by network side equipment and configured for different terminal types; or alternatively
At least two PRACH resource sets configured for different terminal types are determined, and at least one PRACH resource set corresponding to the type of the terminal is selected from the at least two PRACH resource sets.
In one possible implementation, the processor 701 is specifically configured to, when executing the instructions:
receiving at least two physical random access channel PRACH resource sets configured for different terminal types and indicated by the network side equipment through downlink broadcast signaling of the network side equipment; or alternatively
And determining at least two physical random access channel PRACH resource sets configured for different terminal types by a protocol agreed mode.
In one possible implementation, the processor 701 is specifically configured to, when executing the instructions:
In an initial access stage, randomly selecting a PRACH resource from at least one PRACH resource set corresponding to the type of the terminal; or alternatively
After the RRC connection is established, selecting a designated PRACH resource from at least one PRACH resource set corresponding to the type of the terminal according to an indication of the network.
In one possible implementation, the different PRACH formats include any one or more of the following different:
different cyclic prefix CP lengths;
different random access Preamble sequence lengths;
different Preamble repetition times;
different subcarrier spacing.
In one possible implementation, the different terminal types include any one or more of:
different terminal grades;
different terminal capability configurations.
The specific implementation manner of the operations performed by the above units may refer to the specific implementation manner of the PRACH resource allocation and the terminal in the instruction allocation system in the embodiment of the present application when performing the corresponding operations, which are not described in detail in the embodiment of the present application.
Based on the same inventive concept, please refer to fig. 8, an embodiment of the present invention further provides a network side device configured with PRACH resource indication, including:
A processor 801, a memory 802, and a communication interface 803;
wherein the memory 802 stores instructions executable by the processor 801;
the processor 801, when executing the instructions, is configured to:
configuring at least two PRACH resource sets according to different terminal types, wherein each PRACH resource set corresponds to the type of the terminal in the at least two PRACH resource sets which are indicated by the configuration of different terminal types, and different PRACH resource sets correspond to different PRACH formats one by one;
and indicating the PRACH resource set configuration to a terminal so that the terminal can be used for carrying out initial access phase or random access after RRC connection.
In one possible implementation, the processor 801, when executing the instructions, is specifically configured to:
determining at least one PRACH resource set corresponding to the type of a terminal in at least two PRACH resource sets configured for different terminal types, and indicating the PRACH resource set to the terminal; or alternatively
And indicating at least two PRACH resource sets configured for different terminal types to the terminal through downlink broadcast signaling.
In one possible implementation, the processor 801, when executing the instructions, is specifically configured to:
And determining at least two PRACH resource sets configured for different terminal types by a protocol agreed mode.
In one possible implementation, the processor 801, when executing the instructions, is specifically configured to:
and reporting the type of the terminal, indicating the PRACH resource set of the terminal by the network side equipment, and distributing PRACH resources for the terminal.
In one possible implementation, the different PRACH formats include any one or more of the following different:
different cyclic prefix CP lengths;
different random access Preamble sequence lengths;
different Preamble repetition times;
different subcarrier spacing.
In one possible implementation, the different terminal types include any one or more of:
different terminal grades;
different terminal capability configurations.
In one possible implementation, the PRACH resource set configuration for different terminal types is determined according to at least one or more of the following related parameters:
the moving speed of the terminal;
the transmission bandwidth of the terminal;
the transmit power of the terminal.
The specific implementation manner of the operations performed by the above units may refer to the specific implementation manner of the PRACH resource configuration and the network side device in the instruction configuration system in the embodiment of the present application when performing the corresponding operations, which are not described in detail in the embodiment of the present application.
Example six
Based on the same inventive concept, please refer to fig. 9, an embodiment of the present invention provides an apparatus for PRACH resource allocation, including:
the PRACH resource set determining unit 901 is configured to determine, when performing random access, at least one PRACH resource set corresponding to a type of a terminal from at least two PRACH resource sets of physical random access channels configured for different types of terminals, where different PRACH resource sets are in one-to-one correspondence with different PRACH formats;
a PRACH resource selection unit 902, configured to select PRACH resources from the determined at least one PRACH resource set.
As an optional implementation manner, the PRACH resource set determining unit 901 is specifically configured to:
in the initial access stage, determining to execute random access; or alternatively
After establishing the Radio Resource Control (RRC) connection, when the condition for executing the random access is satisfied, determining to execute the random access.
As an optional implementation manner, the PRACH resource set determining unit 901 is specifically configured to:
acquiring at least one PRACH resource set corresponding to a terminal type from at least two PRACH resource sets which are indicated by a network side and configured for different terminal types; or alternatively
At least two PRACH resource sets configured for different terminal types are determined, and at least one PRACH resource set corresponding to the type of the terminal is selected from the at least two PRACH resource sets.
As an optional implementation manner, the PRACH resource set determining unit 901 is specifically configured to:
receiving at least two physical random access channel PRACH resource sets configured for different terminal types and indicated by a network side through a downlink broadcast signaling of the network side; or alternatively
And determining at least two physical random access channel PRACH resource sets configured for different terminal types by a protocol agreed mode.
As an optional implementation manner, the PRACH resource selection unit 902 is specifically configured to:
in an initial access stage, randomly selecting a PRACH resource in at least one PRACH resource set corresponding to the terminal type; or alternatively
After the RRC connection is established, selecting a designated PRACH resource from at least one PRACH resource set corresponding to the type of the terminal according to an indication of the network.
As an alternative embodiment, the different PRACH formats include any one or more of the following different:
different cyclic prefix CP lengths;
Different random access Preamble sequence lengths;
different Preamble repetition times;
different subcarrier spacing.
As an alternative embodiment, the different terminal types include any one or more of:
different terminal grades;
different terminal capability configurations.
The specific implementation manner of the operations performed by the above units may refer to the specific implementation manner of the PRACH resource allocation and the terminal in the instruction allocation system in the embodiment of the present application when performing the corresponding operations, which are not described in detail in the embodiment of the present application.
Based on the same inventive concept, please refer to fig. 10, an embodiment of the present invention further provides an apparatus for PRACH resource allocation, including:
the PRACH resource set configuration unit 1001 is configured to configure at least two PRACH resource sets according to different terminal types, where each PRACH resource set corresponds to a type of a terminal, and different PRACH resource sets correspond to different PRACH formats one by one;
the PRACH resource set indication unit 1002 is configured to indicate the PRACH resource set configuration to a terminal, so that the terminal is used for performing an initial access phase or random access after RRC connection.
As an optional implementation manner, the PRACH resource set indication unit 1002 is specifically configured to:
determining at least one PRACH resource set corresponding to the type of a terminal in at least two PRACH resource sets configured for different terminal types, and indicating the PRACH resource set to the terminal; or alternatively
And indicating at least two PRACH resource sets configured for different terminal types to the terminal through downlink broadcast signaling.
As an optional implementation manner, the PRACH resource set indication unit 1002 is specifically configured to:
and determining at least two PRACH resource sets configured for different terminal types by a protocol agreed mode.
As an optional implementation manner, the PRACH resource set indication unit 1002 is specifically configured to:
and reporting the type of the terminal, indicating the PRACH resource set of the terminal by the network side, and distributing PRACH resources for the terminal.
As an alternative embodiment, the different PRACH formats include any one or more of the following different:
different cyclic prefix CP lengths;
different random access Preamble sequence lengths;
different Preamble repetition times;
different subcarrier spacing.
As an alternative embodiment, the different terminal types include any one or more of:
Different terminal grades;
different terminal capability configurations.
As an optional implementation manner, the PRACH resource set indication unit 1002 is specifically configured to:
determining PRACH resource set configurations for different terminal types according to at least one or more of the following related parameters:
the moving speed of the terminal;
the transmission bandwidth of the terminal;
the transmit power of the terminal.
The specific implementation manner of the operations performed by the above units may refer to the specific implementation manner of the PRACH resource configuration and the network side device in the instruction configuration system in the embodiment of the present application when performing the corresponding operations, which are not described in detail in the embodiment of the present application.
Example seven
Based on the same inventive concept, an embodiment of the present invention provides a computer readable storage medium, where computer instructions are stored, and when the computer instructions run on a computer, the computer is caused to perform the method for PRACH resource allocation and indication allocation described above in the embodiment of the present invention.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention 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 invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. 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 to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (29)
1. A method for PRACH resource allocation, applied to a terminal, comprising:
when random access is executed, determining at least one PRACH resource set corresponding to the terminal type in at least two PRACH resource sets configured for different terminal types, wherein different PRACH resource sets are in one-to-one correspondence with different PRACH formats; the different PRACH formats include any one or more of the following: different cyclic prefix CP lengths; different random access Preamble sequence lengths; different Preamble repetition times; different subcarrier spacing;
And selecting PRACH resources from the determined at least one PRACH resource set.
2. The method of claim 1, wherein determining to perform random access comprises:
in the initial access stage, determining to execute random access; or alternatively
After establishing the Radio Resource Control (RRC) connection, when the condition for executing the random access is satisfied, determining to execute the random access.
3. The method according to claim 1 or 2, wherein determining at least one PRACH resource set corresponding to a terminal type from among at least two PRACH resource sets of physical random access channels configured for different terminal types, comprises:
acquiring at least one PRACH resource set corresponding to a terminal type from at least two PRACH resource sets which are indicated by a network side and configured for different terminal types; or alternatively
At least two PRACH resource sets configured for different terminal types are determined, and at least one PRACH resource set corresponding to the type of the terminal is selected from the at least two PRACH resource sets.
4. The method of claim 1, wherein determining at least two sets of PRACH resources configured for different terminal types comprises:
Receiving at least two physical random access channel PRACH resource sets configured for different terminal types and indicated by a network side through a downlink broadcast signaling of the network side; or alternatively
And determining at least two physical random access channel PRACH resource sets configured for different terminal types by a protocol agreed mode.
5. The method of claim 1, wherein selecting PRACH resources comprises:
in an initial access stage, randomly selecting a PRACH resource in at least one PRACH resource set corresponding to the terminal type; or alternatively
After the RRC connection is established, selecting a designated PRACH resource from at least one PRACH resource set corresponding to the type of the terminal according to an indication of the network.
6. The method of claim 1, wherein the different terminal types include any one or more of:
different terminal grades;
different terminal capability configurations.
7. A method for PRACH resource indication configuration, applied to a network side, comprising:
configuring at least two PRACH resource sets according to different terminal types, wherein each PRACH resource set corresponds to a terminal type in the at least two PRACH resource sets which are configured and indicated for different terminal types, and different PRACH resource sets correspond to different PRACH formats one by one; the different PRACH formats include any one or more of the following: different cyclic prefix CP lengths; different random access Preamble sequence lengths; different Preamble repetition times; different subcarrier spacing;
And indicating the PRACH resource set configuration to a terminal so that the terminal can be used for carrying out initial access phase or random access after RRC connection.
8. The method of claim 7, wherein indicating the PRACH resource set configuration to a terminal comprises:
determining at least one PRACH resource set corresponding to the type of a terminal in at least two PRACH resource sets configured for different terminal types, and indicating the PRACH resource set to the terminal; or alternatively
And indicating at least two PRACH resource sets configured for different terminal types to the terminal through downlink broadcast signaling.
9. The method of claim 8, wherein determining at least two sets of PRACH resources configured for different terminal types comprises:
and determining at least two PRACH resource sets configured for different terminal types by a protocol agreed mode.
10. The method of claim 8, wherein determining at least one PRACH resource set corresponding to the type of the terminal from among at least two PRACH resource sets configured for different terminal types, and indicating to the terminal, comprises:
and reporting the type of the terminal, indicating the PRACH resource set of the terminal by the network side, and distributing PRACH resources for the terminal.
11. The method of claim 7, wherein the different terminal types include any one or more of:
different terminal grades;
different terminal capability configurations.
12. The method according to claim 8, characterized in that PRACH resource set configurations for different terminal types are determined according to at least one or more of the following related parameters:
the moving speed of the terminal;
the transmission bandwidth of the terminal;
the transmit power of the terminal.
13. A terminal for PRACH resource allocation, comprising:
a processor, a memory, and a communication interface;
wherein the memory stores instructions executable by the processor;
the processor, when executing the instructions, is configured to:
when random access is executed, determining at least one PRACH resource set corresponding to the type of the terminal in at least two PRACH resource sets configured for different terminal types, wherein the different PRACH resource sets are in one-to-one correspondence with different PRACH formats; the different PRACH formats include any one or more of the following: different cyclic prefix CP lengths; different random access Preamble sequence lengths; different Preamble repetition times; different subcarrier spacing;
And selecting PRACH resources from the determined at least one PRACH resource set.
14. The terminal of claim 13, wherein the processor, when executing the instructions, is specifically configured to:
in the initial access stage, determining to execute random access; or alternatively
After establishing the Radio Resource Control (RRC) connection, when the condition for executing the random access is satisfied, determining to execute the random access.
15. The terminal according to claim 13 or 14, wherein the processor, when executing the instructions, is specifically configured to:
acquiring at least one PRACH resource set corresponding to the type of a terminal from at least two PRACH resource sets which are indicated by a network side and configured for different terminal types; or alternatively
At least two PRACH resource sets configured for different terminal types are determined, and at least one PRACH resource set corresponding to the type of the terminal is selected from the at least two PRACH resource sets.
16. The terminal of claim 13, wherein the processor, when executing the instructions, is specifically configured to:
receiving at least two physical random access channel PRACH resource sets configured for different terminal types and indicated by a network side through a downlink broadcast signaling of the network side; or alternatively
And determining at least two physical random access channel PRACH resource sets configured for different terminal types by a protocol agreed mode.
17. The terminal of claim 13, wherein the processor, when executing the instructions, is specifically configured to:
in an initial access stage, randomly selecting a PRACH resource from at least one PRACH resource set corresponding to the type of the terminal; or alternatively
After the RRC connection is established, selecting a designated PRACH resource from at least one PRACH resource set corresponding to the type of the terminal according to an indication of the network.
18. The terminal of claim 13, wherein the different terminal types include any one or more of:
different terminal grades;
different terminal capability configurations.
19. A network side device for PRACH resource indication configuration, comprising:
a processor, a memory, and a communication interface;
wherein the memory stores instructions executable by the processor;
the processor, when executing the instructions, is configured to:
configuring at least two PRACH resource sets according to different terminal types, wherein each PRACH resource set corresponds to the type of the terminal in the at least two PRACH resource sets which are indicated by the configuration of different terminal types, and different PRACH resource sets correspond to different PRACH formats one by one; the different PRACH formats include any one or more of the following: different cyclic prefix CP lengths; different random access Preamble sequence lengths; different Preamble repetition times; different subcarrier spacing;
And indicating the PRACH resource set configuration to a terminal so that the terminal can be used for carrying out initial access phase or random access after RRC connection.
20. The network-side device of claim 19, wherein the processor, when executing the instructions, is specifically configured to:
determining at least one PRACH resource set corresponding to the type of a terminal in at least two PRACH resource sets configured for different terminal types, and indicating the PRACH resource set to the terminal; or alternatively
And indicating at least two PRACH resource sets configured for different terminal types to the terminal through downlink broadcast signaling.
21. The network-side device of claim 20, wherein the processor, when executing the instructions, is specifically configured to:
and determining at least two PRACH resource sets configured for different terminal types by a protocol agreed mode.
22. The network-side device of claim 20, wherein the processor, when executing the instructions, is specifically configured to:
and reporting the type of the terminal, indicating the PRACH resource set of the terminal by the network side, and distributing PRACH resources for the terminal.
23. The network-side device of claim 19, wherein the different terminal types include any one or more of:
Different terminal grades;
different terminal capability configurations.
24. The network-side device according to claim 20, wherein the PRACH resource set configuration for different terminal types is determined according to at least one or more of the following related parameters:
the moving speed of the terminal;
the transmission bandwidth of the terminal;
the transmit power of the terminal.
25. An apparatus for PRACH resource allocation, comprising:
the PRACH resource set determining unit is used for determining at least one PRACH resource set corresponding to the type of the terminal in at least two PRACH resource sets of physical random access channels configured for different terminal types when random access is executed, wherein different PRACH resource sets are in one-to-one correspondence with different PRACH formats; the different PRACH formats include any one or more of the following: different cyclic prefix CP lengths; different random access Preamble sequence lengths; different Preamble repetition times; different subcarrier spacing;
and the PRACH resource selection unit is used for selecting PRACH resources from the determined at least one PRACH resource set.
26. The apparatus of claim 25, wherein the PRACH resource set determining unit is specifically configured to:
In the initial access stage, determining to execute random access; or alternatively
After establishing the Radio Resource Control (RRC) connection, when the condition for executing the random access is satisfied, determining to execute the random access.
27. The apparatus of claim 25, wherein the PRACH resource selection unit is specifically configured to:
in an initial access stage, randomly selecting a PRACH resource in at least one PRACH resource set corresponding to the terminal type; or alternatively
After the RRC connection is established, selecting a designated PRACH resource from at least one PRACH resource set corresponding to the type of the terminal according to an indication of the network.
28. An apparatus for PRACH resource indication configuration, comprising:
the PRACH resource set configuration unit is used for configuring at least two PRACH resource sets according to different terminal types, configuring at least two PRACH resource sets indicated for different terminal types, wherein each PRACH resource set corresponds to the type of the terminal, and different PRACH resource sets correspond to different PRACH formats one by one; the different PRACH formats include any one or more of the following: different cyclic prefix CP lengths; different random access Preamble sequence lengths; different Preamble repetition times; different subcarrier spacing;
And the PRACH resource set indicating unit is used for indicating the PRACH resource set configuration to the terminal so that the terminal can be used for carrying out the initial access stage or the random access after the RRC connection.
29. A computer readable storage medium storing computer instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1-12.
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| CN202310358092.XA CN116367326A (en) | 2019-04-30 | 2019-04-30 | PRACH resource allocation and indication allocation method, device and equipment |
| CN201910364628.2A CN111867084B (en) | 2019-04-30 | 2019-04-30 | PRACH resource allocation and indication allocation method, device and equipment |
| PCT/CN2020/081863 WO2020220894A1 (en) | 2019-04-30 | 2020-03-27 | Prach resource configuration and indication configuration method, apparatus, and device |
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| CN201910364628.2A CN111867084B (en) | 2019-04-30 | 2019-04-30 | PRACH resource allocation and indication allocation method, device and equipment |
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| CN113498213A (en) * | 2020-04-03 | 2021-10-12 | 华为技术有限公司 | Method, device and system for random access |
| CN114071495A (en) * | 2020-07-31 | 2022-02-18 | 维沃移动通信有限公司 | Initial access method and device, terminal and network side equipment |
| CN114071427A (en) * | 2020-08-07 | 2022-02-18 | 华为技术有限公司 | Wireless access method and device |
| CN114598433A (en) * | 2020-12-07 | 2022-06-07 | 维沃移动通信有限公司 | Time domain resource configuration method and device of RO (reverse osmosis) and electronic equipment |
| US20240015795A1 (en) * | 2021-10-28 | 2024-01-11 | Apple Inc. | Physical Random Access Channel Enhancements in New Radio |
| CN117751654A (en) * | 2021-11-02 | 2024-03-22 | Oppo广东移动通信有限公司 | Wireless communication method, terminal equipment and network equipment |
| CN115211214A (en) * | 2022-06-01 | 2022-10-18 | 北京小米移动软件有限公司 | Resource allocation method and device |
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| BR112015025597A2 (en) * | 2013-04-08 | 2017-07-18 | Huawei Tech Co Ltd | method for sending and receiving random access preamble, user equipment and base station |
| CN105472761B (en) * | 2014-09-09 | 2018-09-11 | 中兴通讯股份有限公司 | The cut-in method and device of user equipment |
| GB2530566A (en) * | 2014-09-26 | 2016-03-30 | Nec Corp | Communication system |
| CN107872884A (en) * | 2016-09-26 | 2018-04-03 | 电信科学技术研究院 | A kind of random access resource distribution and accidental access method, equipment |
| GB2562099A (en) * | 2017-05-05 | 2018-11-07 | Tcl Communication Ltd | Methods and apparatuses for random-access |
| CN111527776B (en) * | 2017-08-09 | 2023-06-09 | 苹果公司 | PRACH ramping and dynamic beam switching for control and data transmission |
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