CN115515251A

CN115515251A - Network access method, device and storage medium

Info

Publication number: CN115515251A
Application number: CN202110700094.3A
Authority: CN
Inventors: 侯晓辉
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2021-06-23
Filing date: 2021-06-23
Publication date: 2022-12-23
Also published as: WO2022267389A1

Abstract

The application provides a network access method, equipment and a storage medium. The method comprises the following steps: determining the receiving power of two user equipments and the wireless channel correlation between the two user equipments; determining power control strategies of two user devices according to the wireless channel correlation; determining an authorization-free demodulation mode of the user equipment according to the power control strategy and the wireless channel correlation; and sending the authorization-free demodulation mode to the user equipment so that the user equipment carries out authorization-free demodulation and carries out uplink authorization-free access to the network at the same time. According to the technical scheme of the embodiment, the user equipment carries out authorization-free demodulation by combining the multiplexing authorization-free of the multi-user equipment and the uplink power control, so that the technical effect that the multi-user equipment carries out uplink authorization-free and simultaneously accesses to the network is achieved.

Description

Network access method, device and storage medium

Technical Field

The present application relates to the field of communications, and in particular, to a network access method, device, and storage medium.

Background

With the increasing popularity of industrial interconnect and vertical industry applications, low latency services are becoming increasingly important. Low latency is a very difficult goal to achieve for communications, especially for low latency uplink, techniques that rely on pre-scheduling or uplink grant-free are often required. In an actual communication process, although the uplink delay can be greatly reduced through uplink pre-scheduling, when the number of concurrent users of the terminal in a cell is large, channel resources of a Physical uplink Control Channel (PDCCH) are consumed, and the resource consumption is huge and is also very unrealistic. Therefore, how to realize uplink unlicensed simultaneous access by multiple users is an urgent problem to be solved.

Disclosure of Invention

In view of this, embodiments of the present application provide a network access method, device, and storage medium, which implement uplink unlicensed simultaneous access to a network for multiple user equipments.

The embodiment of the application provides a network access method, which is applied to a base station and comprises the following steps:

determining the receiving power of two user equipments and the wireless channel correlation between the two user equipments;

determining power control strategies of two user equipment according to the wireless channel correlation;

determining an authorization-free demodulation mode of the user equipment according to the power control strategy and the wireless channel correlation;

and sending the authorization-free demodulation mode to the user equipment so that the user equipment carries out authorization-free demodulation and carries out uplink authorization-free access to the network at the same time.

The embodiment of the application provides a network access method, which is applied to user equipment and comprises the following steps:

receiving an authorization-free demodulation mode sent by a base station;

and carrying out authorization-free demodulation on the user equipment according to the authorization-free demodulation mode so as to carry out uplink authorization-free simultaneous access to the network.

The embodiment of the application provides a network access device, which is applied to a base station and comprises:

a first determining module configured to determine the received power of two user equipments and the radio channel correlation between the two user equipments;

a second determining module configured to determine power control strategies of two user equipments according to the radio channel correlation;

a third determining module configured to determine an unlicensed demodulation mode of the user equipment according to the power control policy and the radio channel correlation;

and the first transmitter is configured to transmit the authorization-free demodulation mode to the user equipment so as to enable the user equipment to carry out authorization-free demodulation and carry out uplink authorization-free access to a network.

An embodiment of the present application provides a network access apparatus, which is applied to a user equipment, and includes:

the receiver is configured to receive an authorization-free demodulation mode sent by the base station;

and the access device is configured to perform authorization-free demodulation on the user equipment according to the authorization-free demodulation mode so as to perform uplink authorization-free access to the network at the same time.

An embodiment of the present application provides a network access device, including: a communication module, a memory, and one or more processors;

the communication module is configured to perform communication interaction between the base station and the user equipment;

the memory configured to store one or more programs;

when executed by the one or more processors, cause the one or more processors to implement the method of any of the embodiments described above.

The embodiment of the present application provides a storage medium, wherein the storage medium stores a computer program, and the computer program realizes the method of any one of the above embodiments when being executed by a processor.

According to the technical scheme of the embodiment of the application, the receiving power of the two pieces of user equipment and the wireless channel correlation between the two pieces of user equipment are determined; determining power control strategies of two user equipment according to the wireless channel correlation; determining an authorization-free demodulation mode of the user equipment according to the power control strategy and the wireless channel correlation; and sending the authorization-free demodulation mode to the user equipment so as to enable the user equipment to carry out authorization-free demodulation and carry out uplink authorization-free access to the network. According to the technical scheme of the embodiment, the user equipment carries out authorization-free demodulation by combining the multiplexing authorization-free of the multi-user equipment and the uplink power control, so that the technical effect that the multi-user equipment carries out uplink authorization-free and simultaneously accesses to the network is achieved.

Drawings

Fig. 1 is a flowchart of a network access method according to an embodiment of the present application;

fig. 2 is a flowchart of another network access method provided in an embodiment of the present application;

fig. 3 is a schematic diagram illustrating allocation of spectrum resources based on service application sensing according to an embodiment of the present application;

fig. 4 is a flowchart of another network access method provided in an embodiment of the present application;

fig. 5 is a schematic diagram of an unlicensed multi-user uplink transmission under frequency domain multiplexing according to an embodiment of the present application;

fig. 6 is an implementation framework of a self-service awareness application based on a user equipment according to an embodiment of the present application;

fig. 7 is an implementation framework of application awareness centering on a network master according to an embodiment of the present application;

fig. 8 is a block diagram illustrating a network access device according to an embodiment of the present disclosure;

fig. 9 is a block diagram of another network access device according to an embodiment of the present disclosure;

fig. 10 is a schematic structural diagram of a network access device according to an embodiment of the present application.

Detailed Description

Hereinafter, embodiments of the present application will be described with reference to the drawings. The present application is described below with reference to the drawings of the embodiments, which are only used for explaining the present application and are not used for limiting the scope of the present application.

The embodiment of the application solves the problem of uplink low time delay, and relates to the realization of the uplink low time delay in an authorization-free mode. Although the uplink delay can be greatly reduced by uplink pre-scheduling, when the number of concurrent users of the terminal in the cell is large, the channel resource of the PDCCH is consumed, and the resource consumption is huge and is very unrealistic.

The embodiment of the application provides a network access method, in particular to a pilot-guided uplink authorization-free simultaneous access method for multi-user identification. The method can effectively solve the problem of resource consumption of the PDCCH, and simultaneously, the best adaptation of the service and the air interface resource is carried out through the perception of the service application. Different applications correspond to different delay requirements, different rate requirements, and different services have different packet sizes for each packet transmission. Therefore, through the sensing of the Service application, the optimal adaptation can be achieved on the utilization rate of the spectrum resources, the spectrum efficiency and the Service Level Agreement (SLA), which is very important for communication in which the spectrum resources are precious, and is also an evolution direction in which 6G is very important.

The optimal allocation of the uplink authorization-free resources can be carried out according to the time delay requirements and the reliability of different uplink services. According to the embodiment of the application, frequency spectrum resources are divided into 2 large levels according to network delay requirements and reliability requirements, wherein one of the large levels is extremely low delay (< 2 ms) and ultra-high reliability (more than 5 and more than 9), the part of frequency spectrum resource set is marked as A1, the frequency domain resource allocation of the part A1 is orthogonal frequency division multiple access for access users, and the problem of frequency domain resource multiplexing of multiple users does not exist at the moment, so that the authorization is avoided and pilot frequency assistance is not needed; the other part is low delay (< 3 ms) and high reliability (5, less than 9), and the part of the spectrum resource set is marked as A2. For the part of resources of A2, using orthogonal pilot guidance, there is multiplexing of multiple users for the frequency domain resources of the uplink.

For the situation of frequency domain resource A2 multiplexing, the embodiment of the present application provides a scheme for jointly considering frequency domain resource multi-user multiplexing authorization-free and uplink power control, so that the balanced demodulation performance of the uplink PHY of multiple users under such a condition is optimal.

In an embodiment, fig. 1 is a flowchart of a network access method provided in an embodiment of the present application. The embodiment is suitable for the situation that the uplink authorization-free access networks of a plurality of user equipment are accessed to the network simultaneously. The present embodiment may be performed by a network access device. The network access device may be a base station. As shown in fig. 1, the present embodiment includes:

s110, determining the receiving power of the two user equipment and the wireless channel correlation between the two user equipment.

The radio channel correlation refers to correlation between channels corresponding to two User Equipments (UEs), respectively.

In one embodiment, when the user equipment initially accesses the base station in uplink, determining the received powers of two user equipments and the radio channel correlation between the two user equipments includes: determining the receiving power of two pieces of user equipment according to the receiving power of a Physical Random Access Channel (PRACH) of the user equipment in an Access stage; and determining the wireless channel correlation between the two user equipments according to the preamble sequence of the PRACH. In the embodiment, when the ue initially accesses the base station in uplink, the base station may obtain the received powers of the two ues by detecting the received powers of the PRACH in the access phase of the ue, so as to perform reasonable power control in the unlicensed phase by using the relative relationship and the absolute setting of the two ues. In the embodiment, the correlation of the wireless channel between two corresponding user equipments is determined according to the preamble sequence of the PRACH channel where the user equipment is located. It can be understood that the channel estimates of two ues are directly calculated according to a pre-configured calculation formula to obtain the correlation of radio channels, i.e. the cross-correlation coefficient between two ues. The pre-configured calculation formula may refer to the prior art, which is not described herein again.

In an embodiment, after a user equipment accesses a Physical Uplink Shared Channel (PUSCH) Channel, determining reception power of two user equipments and a radio Channel correlation between the two user equipments includes: the received powers of the two user equipments and the radio channel correlation between the two user equipments are determined from the orthogonal pilots. In an embodiment, after two user equipments are accessed in a PUSCH channel, the receiving power of the two user equipments and the wireless channel correlation between the two user equipments are respectively detected according to orthogonal pilots. In an embodiment, the received power of the ue is an average received power of each Resource Element (RE) of the PRACH; the correlation of the radio channels, that is, the cross correlation coefficient is calculated for the complex sequences of the channel estimates of the two ues.

And S120, determining power control strategies of the two user equipment according to the wireless channel correlation.

In an embodiment, the power control policy refers to a policy for adjusting the current received power of the user equipment so that the user equipment operates in an optimal demodulation interval.

In one embodiment, determining a power control strategy based on wireless channel correlation includes: under the condition of large wireless channel correlation, adjusting uplink transmitting power according to a Serial Interference Cancellation (SIC) demodulation mode, and enabling the user equipment to work in an SIC optimal demodulation interval; when the wireless channel correlation is small, the user equipment is operated in a Signal to Interference plus Noise Ratio (SINR) interval in the joint equalization. In the embodiment, under the condition that the wireless channel correlation is relatively high, the uplink transmitting power is adjusted according to the SIC demodulation mode, so that two user devices work in an SIC optimal demodulation interval, wherein the SIC optimal demodulation interval is that the difference of the receiving power of the two user devices is within a first preset power deviation range, and meanwhile, the receiving power of each user device is greater than a SIC demodulation reasonable threshold. In the embodiment, when the correlation of the wireless channel is relatively small, demodulation is performed according to a joint equalization manner, and meanwhile, two pieces of user equipment are enabled to work in a joint equalization optimal SINR interval, where the joint equalization optimal SINR interval is that the difference of the received powers of the two pieces of user equipment is within a second preset power deviation range, and meanwhile, the received power of each piece of user equipment is greater than a joint equalization demodulation reasonable threshold. It should be noted that the SIC demodulation reasonable threshold and the joint equalization demodulation reasonable threshold both refer to the optimal baseband demodulation thresholds of the two ues. For the SIC demodulation mode and the joint equalization demodulation mode, the optimal baseband demodulation thresholds are different, namely the SIC demodulation reasonable threshold and the joint equalization demodulation reasonable threshold are different. In short, for the SIC demodulation mode, a channel of a strong user equipment (also referred to as a strong user) is estimated first, and a user equipment with high received power is demodulated; then reconstructing a channel from the strong user equipment to the receiver through the wireless channel; then, the signal of the strong user equipment can be subtracted from the received total signal to obtain the channel of the weak user equipment (also called as weak user) passing through the channel; then estimating a channel of the weak user equipment; finally, demodulating the signal of the weak user equipment; therefore, the received power deviation for the strong user equipment and the weak user equipment is large, for example, the SIC demodulation reasonable threshold is 10dB, and meanwhile, each user equipment is guaranteed to have a large SINR relative to noise. For the joint equalization demodulation mode, channel estimation of two user equipments, namely a strong user equipment and a weak user equipment, is performed simultaneously, and then signals of the two user equipments are performed simultaneously, so that the received power of the two user equipments is basically equal, or the received power deviation is less than 5dB, and simultaneously, each user equipment is ensured to have a larger SINR relative to noise.

And S130, determining an authorization-free demodulation mode of the user equipment according to the power control strategy and the radio channel correlation.

The authorization-free demodulation mode refers to a mode that the user equipment can demodulate without issuing an authorization instruction to the user equipment by the base station. In one embodiment, determining an unlicensed demodulation mode of a user equipment according to a power control policy and a radio channel correlation includes: under the condition that the correlation of a wireless channel is large and the receiving power difference value between two pieces of user equipment is within a first preset power deviation range, the authorization-free demodulation mode of the user equipment is serial interference elimination demodulation; and under the condition that the correlation of the wireless channel is small and the receiving power difference value between the two pieces of user equipment is within a second preset power deviation range, the authorization-free demodulation mode of the user equipment is joint equalization demodulation.

In the embodiment, for a channel with large channel correlation, a proper power deviation is configured for the received power between two pieces of user equipment, that is, the received power difference between the two pieces of user equipment is within a first preset power deviation range, and serial interference cancellation demodulation is selected when demodulation is performed in an authorization-free stage; for the channel with small channel correlation, the characteristics of the wireless channel are fully utilized, so that the receiving power of the two user equipment is basically equal, and a joint equalization mode is adopted during the demodulation in the authorization-free stage. Meanwhile, the uplink power control is adjusted to be larger or smaller, and the noise memorability of each user equipment is also required, that is, the optimal SINR demodulation interval needs to be satisfied.

And S140, sending the authorization-free demodulation mode to the user equipment so as to enable the user equipment to carry out authorization-free demodulation and carry out uplink authorization-free access to the network.

In the embodiment, the base station sends the authorization-free demodulation mode to each user equipment to enable the user equipment to carry out authorization-free demodulation, so that the technical effect that a plurality of user equipment carry out uplink authorization-free access to the network at the same time is achieved.

Certainly, when the uplink initial access is performed, the detection of the correlation of the wireless channel between the two user equipments may not be performed, and the PRACH received power in the access phase and the SIC mode may be used for demodulation, and the uplink power control mode of the received power of the two user equipments is adjusted to the optimal demodulation threshold, for example, the received power difference between the two user equipments is within a first preset power deviation range, for example, the received power difference is 10dB. Of course, the PRACH channel may also be used to calculate the radio channel correlation of two user equipments, and determine that the demodulation mode adopted in the service phase is joint equalization or serial interference cancellation.

According to the technical scheme of the embodiment, the user equipment carries out authorization-free demodulation by combining the multiplexing authorization-free of the multi-user equipment and the uplink power control, so that the technical effect that the multi-user equipment carries out uplink authorization-free and simultaneously accesses to the network is achieved.

In an embodiment, fig. 2 is a flowchart of another network access method provided in the embodiment of the present application. The present embodiment further describes a network access process based on the foregoing embodiments. As shown in fig. 2, the network access method in this embodiment includes the following steps:

s210, dividing the frequency spectrum resources of the cell where the user equipment is located into at least two frequency spectrum resource sets.

In the embodiment, the frequency spectrum resources of the cell in which the user equipment is located are divided into at least two frequency spectrum resource sets, so that the uplink time delay can be reduced to the lowest possible value. For example, the spectrum resource of the cell in which the user equipment is located may be divided into two sets of spectrum resources, namely a first set of spectrum resources and a second set of spectrum resources. Exemplarily, assume that a first set of spectrum resources is denoted as A1, and the spectrum resources in A1 are very low latency (< 2 ms) and ultra-high reliability (5 resources and 9 resources); the second set of spectral resources is denoted A2, and the spectral resources in A2 are low latency (< 3 ms) and higher reliability (5 resources and less than 9). The frequency domain resource allocation of the part A1 is to perform orthogonal frequency division multiple access for access users, and the problem of frequency domain resource multiplexing of a plurality of users does not exist at the moment, so that the authorization is avoided without pilot frequency assistance; for the part of resources A2, using orthogonal pilot guidance, there is multiplexing of multiple users for the uplink frequency domain resources. It can be understood that, for the A2 resource, a spectrum resource multi-user multiplexing authorization-free and uplink power control combined mode may be adopted, so that the balanced demodulation performance of the uplink PHY of the multiple user equipments under such a condition is optimal.

S220, selecting a corresponding frequency spectrum resource set according to the received network delay requirement and reliability requirement of the user equipment.

In an embodiment, selecting a corresponding spectrum resource set according to a received network delay requirement and a reliability requirement of a user equipment includes: selecting a first frequency spectrum resource set for user equipment with low time delay and high reliability; and selecting a second frequency spectrum resource set for the user equipment with low time delay and low reliability. In the embodiment, for user equipment which requires low time delay and simultaneously requires high reliability, when authorization is not performed in uplink, frequency spectrum resources are distributed to the user equipment with low time delay and high reliability in a frequency division multiple access mode; for the user equipment which requires low time delay and simultaneously requires less high reliability, the spectrum resources of the user equipment are multiplexed when the uplink is free from authorization, that is, the spectrum resources in the second spectrum resource set are allowed to be multiplexed by the multi-user spectrum resources, so that the activation detection is better performed on the activated user, and meanwhile, the orthogonalization processing can be performed so that the demodulation performance of the plurality of user equipment under the condition can achieve a better effect.

In one embodiment, for a low latency and low reliability ue, deModulation Reference signals (DM RSs) of the ue are orthogonal and frequency division is prioritized. In an embodiment, when performing uplink data transmission, DM RSs between user equipments are required to be orthogonal, and frequency division is prioritized, and code division is prioritized.

In an embodiment, for a low-latency and low-reliability ue, the Frequency spectrum resources occupied by the pilot sequence of the ue in the second set of Frequency spectrum resources are all REs of a first Orthogonal Frequency Division Multiplexing (OFDM) symbol. Fig. 3 is a schematic diagram of allocation of spectrum resources based on service application sensing according to an embodiment of the present application. As shown in fig. 3, in an embodiment, for orthogonal pilot sequences, the pilots fully occupy all REs of the first OFDM symbol that are spectrum resources of the second set of spectrum resources. The pilot may use a plurality of orthogonal correlation sequences to satisfy orthogonality. Illustratively, a classical ZC sequence or the like may be directly utilized. The pilot frequency is used for carrying out the correlation detection of the channel and the activation detection of the user equipment, and meanwhile, the channel estimation is provided for demodulation, and a reference closed-loop reference is provided for uplink power control. For multiple user devices with multiplexed spectrum resources, it is necessary to transmit orthogonal pilots and then data.

And S230, sending the spectrum resources in the spectrum resource set to the user equipment so that the user equipment takes the spectrum resources as uplink resources.

In the embodiment, the spectrum resources in the spectrum resource set are sent to the corresponding user equipment, so that the user equipment uses the spectrum resources as uplink resources, and the user equipment transmits uplink data through the uplink resources.

And S240, determining the receiving power of the two user equipment and the wireless channel correlation between the two user equipment.

And S250, determining power control strategies of the two user equipment according to the wireless channel correlation.

And S260, determining an authorization-free demodulation mode of the user equipment according to the power control strategy and the wireless channel correlation.

And S270, sending the authorization-free demodulation mode to the user equipment so as to enable the user equipment to carry out authorization-free demodulation and carry out uplink authorization-free access to the network.

In the technical scheme of this embodiment, on the basis of the above embodiment, the frequency spectrum resource of the cell in which the user equipment is located is divided into a plurality of frequency spectrum resource sets, and the base station can select a corresponding frequency spectrum resource set according to the network delay requirement and the reliability requirement of the user equipment, so that the technical effect of parallel access of a plurality of user equipments with different reliability requirements under low delay is achieved.

In an embodiment, fig. 4 is a flowchart of another network access method provided in an embodiment of the present application. The embodiment is suitable for the condition that the uplink authorization-free access networks of a plurality of user equipment are simultaneously accessed. The present embodiment may be performed by a network access device. The network access device may be a user equipment. As shown in fig. 4, the present embodiment includes:

and S410, receiving the authorization-free demodulation mode sent by the base station.

And S420, performing authorization-free demodulation on the user equipment according to an authorization-free demodulation mode so as to perform uplink authorization-free access to the network.

In the embodiment, the base station sends the authorization-free demodulation mode determined according to the power control strategy and the wireless channel correlation to the user equipment, so that the user equipment performs authorization-free demodulation on the user equipment according to the corresponding authorization-free demodulation mode, and the technical effect of accessing the uplink authorization-free mode to the network at the same time can be realized.

In an embodiment, before the receiving of the authorization-free demodulation scheme sent by the base station, the method applied to network access of the user equipment further includes: determining a network delay requirement and a reliability requirement according to the service application characteristics based on the network slice; sending the network delay requirement and the reliability requirement to a base station; receiving a frequency spectrum resource set which is sent by a base station and is selected according to the network delay requirement and the reliability requirement; and taking the spectrum resources in the spectrum resource set as uplink resources. In the embodiment, the user equipment combines with the network slice, and the perception of the user equipment on the service application characteristics is converted into the time delay requirement and the reliability requirement of the service on the network, and the user equipment informs the wireless network side through signaling. Fig. 5 is a schematic diagram of unlicensed multi-user uplink transmission under frequency domain multiplexing according to an embodiment of the present application. As shown in fig. 5, a Radio Resource Control (RRC) signaling informs a base station, or informs a core network through a Non-Access Stratum (NAS) signaling, and then informs the base station through the core network, and the base station selects corresponding uplink resources according to a corresponding network delay requirement and a reliability requirement, so as to determine whether the unlicensed Resource of the user equipment is on a Resource of a first spectrum Resource set or a Resource of a second spectrum Resource set. When the network is informed through NAS signaling, some relevant auxiliary parameters of the slice may be selected to inform the network of the corresponding delay, reliability level, and the like. In order to fully ensure the performance of the uplink service, particularly the performance of low delay, the radio resource of the base station simultaneously provides the number of users, the supported uplink rate, and the like that can be supported by the spectrum resource in the corresponding first spectrum resource set, and provides the number of users, the supported uplink rate, and the like that can be supported by the spectrum resource in the corresponding second spectrum resource set, and radio-related pre-planning is made. Of course, for the downlink, similar planning may be performed according to the joint optimization of the spectrum efficiency, the spectrum utilization rate, and the SLA requirement. Since the scheme of the embodiment of the present application mainly focuses on the uplink, the embodiment of the present application is not described to a great extent for the downlink. The embodiment solves the problem of optimal combination of spectrum utilization rate, spectrum efficiency and SLA requirements through network slicing and resource allocation of application sensing.

In an embodiment, the network delay requirement and the reliability requirement are determined based on network handover and application awareness, so that spectrum resources are allocated according to the network delay requirement and the reliability requirement. Fig. 6 is an implementation framework of a self-service awareness application based on a user equipment according to an embodiment of the present application; fig. 7 is a framework for implementing application awareness centering on network master according to an embodiment of the present application. In an embodiment, the implementation framework of application awareness includes two types: one is the perception of user equipment autonomy, see fig. 6; another is application awareness, centered on network hosting, see fig. 7.

For the user equipment autonomous sensing architecture, the flow is as follows:

the user equipment performs mapping to the slice and the slice parameter according to one or more parameters according to corresponding service description features (such as APP ID, full Qualified Domain Name (FQDN), internet Protocol (IP) quintuple), wherein the specific mapping relation is determined by the user equipment and is interacted with a core network through related NAS signaling of the slice;

the core network informs the base station of the corresponding delay requirement and reliability requirement, and of course, the core network can also perform certain logic conversion;

and the base station selects the first frequency spectrum resource set or the second frequency spectrum resource set according to the corresponding time delay and reliability requirements.

The difference between the network master-centric application-aware architecture and the UE-autonomous-aware architecture is that: the mapping strategy is issued by the network, and if necessary, the network side can carry out mapping logic verification on the mapping strategy. The mapping policy may interact with the user equipment in a broadcast manner or a unicast manner in a signaling flow manner.

In one embodiment, a design of a total budget for latency and overall rate over a spectrum bandwidth is described. Illustratively, assume that for a Frequency Division Duplex (FDD) New air interface (New Radio, NR) of 40M bandwidth, 20M bandwidth is allocated to low latency traffic, where 10M bandwidth is allocated to spectrum resource A1 in the first set of spectrum resources and 10M bandwidth is allocated to spectrum resource A2 in the second set of spectrum resources.

Illustratively, the slot is 31752bit and the mini slot (2 symbols) is 3904 when the Modulation and Coding Scheme (MCS) is 27 and the Resource Block ((Resource Block, RB) is 52, and the slot is 12552bit and the mini slot is 1608bit when the MCS is 17 and the RB is 52.

For the 10M A1 resource, for the service with uplink reliability of 5 and 9, the service with wireless side delay within 2ms, the uplink grant-free resource, and the uplink total design rate. At very good coverage, slot level scheduling: 31.752Mbps; in general coverage, slot level scheduling: 12.552Mbps.

10M A2 resources, for services with uplink reliability of 4 and 9, service with wireless side delay within 1ms, uplink authorization-free resources, and for uplink total design rate. For example, using one symbol as pilot, the advantage is smaller for the minislot of 2 symbols. The unlicensed pilot overhead is 50%. But for a 7 symbol minislot there is a clear capacity advantage. The overhead proportion is only 14%. At very good coverage, minislot level scheduling: 3.904/2=1.952mbps; in general coverage, minislot level scheduling: 1.608/2=0.804mbps.

The number of supported users (i.e. the number of user equipments) can be obtained by conversion of division according to the overall requirements of time delay, rate, etc.

In one embodiment, the process of unlicensed demodulation is described based on unlicensed and joint power control of pilots. For the above implementation example, the general coverage evaluation is followed. Assuming that 1ms of wireless side delay is supported, 1 minislot is simultaneously uplink unlicensed 2 user equipments, the rate of each user equipment is 0.804/4=0.402mbps. For example, in the present embodiment, two user equipments, UE1 and UE2, are taken as an example, and an authorization-free demodulation process is described.

Firstly, UE1 and UE2 are respectively accessed to a base station, and the receiving power of each RE of the PRACH of the UE1 in the access phase is assumed to be-78 dbm; the PRACH received power per RE for access phase UE2 is-82 dbm.

Then, at the PUSCH access stage of the UE1, the PUSCH receiving power of each RE is-79 dbm after the authorization-free transmission; PUSCH access phase for UE2, PUSCH-84 dbm per RE received power.

Using the pilot calculation to obtain that the wireless channel correlation is 0.1, using the joint equalization; aiming at the UE2, power control adjustment is issued, and the transmitting power of the UE2 is increased by 5dB; UE1 and UE2 are then demodulated in a joint equalization scheme.

Then, after a period of time, in the PUSCH access stage of the UE1, the PUSCH receives-79 dbm of power per RE; PUSCH access phase for UE2, PUSCH-79 dbm per RE received power.

Then, the correlation of the wireless channel is calculated by using the preamble and is 0.9, so that the SIC demodulation is needed, and the transmitting power of the UE2 is adjusted to be increased by 10dB. Correspondingly, in the PUSCH access stage of the UE1, the PUSCH receives-79 dbm of power per RE; PUSCH access phase for UE2, PUSCH-69 dbm per RE received power.

Then, UE1 and UE2 are demodulated according to the demodulation scheme of SIC.

In an embodiment, fig. 8 is a block diagram of a network access device according to an embodiment of the present disclosure. The embodiment is applied to the network access equipment. The network access equipment is a base station. As shown in fig. 8, the present embodiment includes: a first determination module 810, a second determination module 820, a third determination module 830, and a first transmitter 840.

Wherein the first determining module 810 is configured to determine the received power of two user equipments and the radio channel correlation between the two user equipments;

a second determining module 820 configured to determine power control strategies of two user equipments according to the radio channel correlation;

a third determining module 830, configured to determine an unlicensed demodulation mode of the ue according to the power control policy and the radio channel correlation;

a first transmitter 840, configured to send the unlicensed demodulation mode to the user equipment, so that the user equipment performs unlicensed demodulation and performs uplink unlicensed simultaneous access to the network.

The network access apparatus provided in this embodiment is configured to implement the network access method in the embodiment shown in fig. 1, and the implementation principle and the technical effect of the network access apparatus provided in this embodiment are similar, which are not described herein again.

In an embodiment, when the ue initially accesses the base station uplink, the first determining module 810 includes:

a first determining unit, configured to determine the receiving power of two user equipments according to the receiving power of the user equipments in the access phase PRSCH;

a second determining unit configured to determine a radio channel correlation between the two user equipments according to the preamble sequence of the PRACH channel.

In an embodiment, after the user equipment accesses the PUSCH channel, the first determining module 810 is specifically configured to: the received powers of the two user equipments and the radio channel correlation between the two user equipments are determined from the orthogonal pilots.

In an embodiment, the second determining module 820 is specifically configured to:

under the condition of large correlation of a wireless channel, adjusting uplink transmitting power according to a SIC demodulation mode, and enabling user equipment to work in an SIC optimal demodulation interval;

and under the condition of small wireless channel correlation, the user equipment works in the SINR interval of the optimal signal-to-interference-plus-noise ratio in the joint equalization.

In one embodiment, the third determining module 830 includes:

under the conditions that the correlation of a wireless channel is large and the receiving power difference value between two user equipment is within a first preset power deviation range, the authorization-free demodulation mode of the user equipment is serial interference elimination demodulation;

and under the condition that the correlation of the wireless channel is small and the receiving power difference value between the two pieces of user equipment is within a second preset power deviation range, the authorization-free demodulation mode of the user equipment is joint equalization demodulation.

In an embodiment, the network access apparatus further includes:

a divider configured to divide the spectrum resources of a cell in which the user equipment is located into at least two sets of spectrum resources before determining the reception power of the two user equipments and the radio channel correlation between the two user equipments;

the selector is configured to select a corresponding spectrum resource set according to the received network delay requirement and reliability requirement of the user equipment;

and the second transmitter is configured to transmit the spectrum resources in the spectrum resource set to the user equipment, so that the user equipment uses the spectrum resources as uplink resources.

In an embodiment, the selector is specifically configured to: selecting a first frequency spectrum resource set for user equipment with low time delay and high reliability;

and selecting a second frequency spectrum resource set for the user equipment with low time delay and low reliability.

In an embodiment, for a low-latency and low-reliability user equipment, the DM RS of the user equipment is orthogonal and frequency division is prioritized.

In an embodiment, for a low-latency and low-reliability user equipment, the pilot sequence of the user equipment occupies all resource elements RE of the first OFDM symbol in the spectrum resources of the second spectrum resource set.

In an embodiment, fig. 9 is a block diagram of another network access device provided in the embodiment of the present application. The embodiment is applied to the network access equipment. The network access equipment is user equipment. As shown in fig. 9, the present embodiment includes: a first receiver 910 and an access 920.

The first receiver 910 is configured to receive an unlicensed demodulation scheme sent by a base station;

the access 920 is configured to perform an authorization-free demodulation on the ue according to an authorization-free demodulation manner, so as to perform uplink authorization-free access to the network.

The network access apparatus provided in this embodiment is configured to implement the network access method in the embodiment shown in fig. 4, and the implementation principle and the technical effect of the network access apparatus provided in this embodiment are similar, and are not described herein again.

In one embodiment, the network access apparatus applied to the user equipment further includes:

the fourth determining module is configured to determine a network delay requirement and a reliability requirement according to the service application characteristics based on the network slice;

a third transmitter configured to transmit the network delay requirement and the reliability requirement to the base station;

the second receiver is configured to receive a spectrum resource set which is sent by the base station and is selected according to the network delay requirement and the reliability requirement;

and the fifth determining module is configured to take the spectrum resources in the spectrum resource set as uplink resources.

In an embodiment, fig. 10 is a schematic structural diagram of a network access device according to an embodiment of the present application. As shown in fig. 10, the present application provides an apparatus comprising: a processor 1010, a memory 1020, and a communication module 1030. The number of the processors 1010 in the device may be one or more, and one processor 1010 is illustrated in fig. 10 as an example. The number of the memories 1020 in the device may be one or more, and one memory 1020 is taken as an example in fig. 10. The processor 1010, the memory 1020 and the communication module 1030 of the device may be connected by a bus or other means, and fig. 10 illustrates the connection by a bus as an example. In this embodiment, the apparatus may be a base station.

The memory 1020, which may be a computer-readable storage medium, may be configured to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the apparatus of any embodiment of the present application (e.g., the first determining module 810, the second determining module 820, the third determining module 830, and the first transmitter 840 in the network access device). The memory 1020 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to use of the device, and the like. Further, the memory 1020 may include high speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the memory 1020 can further include memory located remotely from the processor 1010, which can be connected to devices over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

A communication module 1030 configured to perform communication interaction between the base station and the user equipment.

In the case that the network access device is a base station, the device provided above may be configured to execute the network access method applied to the base station provided in any of the above embodiments, and has corresponding functions and effects.

In the case that the network access device is a user device, the device provided above may be configured to execute the network access method applied to the user device provided in any of the above embodiments, and has corresponding functions and effects.

Embodiments of the present application also provide a storage medium containing computer-executable instructions, which when executed by a computer processor, are configured to perform a network access method applied to a base station, the method including: determining the receiving power of two user equipments and the wireless channel correlation between the two user equipments; determining power control strategies of two user equipment according to the wireless channel correlation; determining an authorization-free demodulation mode of the user equipment according to the power control strategy and the wireless channel correlation; and sending the authorization-free demodulation mode to the user equipment so as to enable the user equipment to carry out authorization-free demodulation and carry out uplink authorization-free access to the network.

Embodiments of the present application also provide a storage medium containing computer-executable instructions, which when executed by a computer processor, are configured to perform a network access method applied to a user equipment, the method including: receiving an authorization-free demodulation mode sent by a base station; and carrying out authorization-free demodulation on the user equipment according to an authorization-free demodulation mode so as to carry out uplink authorization-free simultaneous access to the network.

It will be clear to a person skilled in the art that the term user equipment covers any suitable type of wireless user equipment, such as mobile phones, portable data processing devices, portable web browsers or vehicle-mounted mobile stations.

In general, the various embodiments of the application may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. For example, some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device, although the application is not limited thereto.

Embodiments of the application may be implemented by a data processor of a mobile device executing computer program instructions, for example in a processor entity, or by hardware, or by a combination of software and hardware. The computer program instructions may be assembly instructions, instruction Set Architecture (ISA) instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages.

Any logic flow block diagrams in the figures of this application may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions. The computer program may be stored on a memory. The memories may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as, but not limited to, read-Only memories (ROMs), random Access Memories (RAMs), optical storage devices and systems (Digital Video disks (DVDs), compact Discs (CDs)), etc. The computer readable medium may include a non-transitory storage medium. The data processor may be of any type suitable to the local technical environment, such as but not limited to general purpose computers, special purpose computers, microprocessors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), programmable logic devices (FGPAs), and processors based on a multi-core processor architecture.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A network access method is applied to a base station and comprises the following steps:

and sending the authorization-free demodulation mode to the user equipment so as to enable the user equipment to carry out authorization-free demodulation and carry out uplink authorization-free access to a network.

2. The method of claim 1, wherein the determining the received powers of the two ues and the radio channel correlation between the two ues when the ue initially accesses the base station uplink comprises:

determining the receiving power of two pieces of user equipment according to the receiving power of PRACH (physical random access channel) of the user equipment in an access stage;

and determining the wireless channel correlation between the two user equipments according to the preamble sequence of the PRACH.

3. The method of claim 1, wherein the determining the received power of two user equipments and the radio channel correlation between the two user equipments after the user equipments access a Physical Uplink Shared Channel (PUSCH) channel comprises:

the received powers of the two user equipments and the radio channel correlation between the two user equipments are determined from the orthogonal pilots.

4. The method of claim 1, wherein determining a power control strategy based on the radio channel correlation comprises:

under the condition that the wireless channel correlation is large, adjusting uplink transmitting power according to a Serial Interference Cancellation (SIC) demodulation mode, and enabling the user equipment to work in an SIC optimal demodulation interval;

and under the condition of small wireless channel correlation, operating the user equipment in a joint equalization best signal to interference plus noise ratio (SINR) interval.

5. The method of claim 1, wherein determining an unlicensed demodulation mode for a UE according to the power control policy and the radio channel correlation comprises:

under the condition that the correlation of the wireless channel is large and the receiving power difference value between two user equipment is within a first preset power deviation range, the authorization-free demodulation mode of the user equipment is serial interference elimination demodulation;

6. The method of claim 1, wherein prior to the determining the received power of the two user equipments and the radio channel correlation between the two user equipments, further comprising:

dividing frequency spectrum resources of a cell in which user equipment is located into at least two frequency spectrum resource sets;

selecting a corresponding frequency spectrum resource set according to the received network delay requirement and reliability requirement of the user equipment;

and sending the spectrum resources in the spectrum resource set to user equipment so that the user equipment takes the spectrum resources as uplink resources.

7. The method of claim 6, wherein selecting the corresponding set of spectrum resources according to the received network latency requirement and reliability requirement of the UE comprises:

selecting a first spectrum resource set for user equipment with low time delay and high reliability;

8. The method according to claim 7, wherein for a low latency and low reliability user equipment, the demodulation reference signals DM RS of the user equipment are orthogonal and frequency division is prioritized.

9. The method of claim 7, wherein for a low latency and low reliability user equipment, the pilot sequence of the user equipment occupies the spectrum resources in the second set of spectrum resources for all Resource Elements (REs) of the first OFDM symbol.

10. A network access method is applied to user equipment and comprises the following steps:

receiving an authorization-free demodulation mode sent by a base station;

11. The method of claim 10, wherein before the receiving base station sends the license-exempt demodulation mode, further comprising:

determining a network delay requirement and a reliability requirement according to the service application characteristics based on the network slice;

sending the network delay requirement and the reliability requirement to a base station;

receiving a frequency spectrum resource set which is sent by a base station and is selected according to the network delay requirement and the reliability requirement;

and taking the frequency spectrum resources in the frequency spectrum resource set as uplink resources.

12. A network access device, comprising: a communication module, a memory, and one or more processors;

the memory configured to store one or more programs;

when executed by the one or more processors, cause the one or more processors to implement the method of any one of claims 1-9 or 10-11 above.

13. A storage medium, characterized in that the storage medium stores a computer program which, when executed by a processor, implements the method according to any one of claims 1-9 or 10-11.