WO2018059283A1

WO2018059283A1 - Wireless resource allocation method and device

Info

Publication number: WO2018059283A1
Application number: PCT/CN2017/102359
Authority: WO
Inventors: 唐枫
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-09-28
Filing date: 2017-09-20
Publication date: 2018-04-05
Also published as: CN107872892A; CN107872892B

Abstract

The present invention relates to the field of communications, and provides a wireless resource allocation method and device. The method comprises: a base station determines a delay priority of each terminal; the base station allocates resource elements (REs) to corresponding terminals in sequence according to a descending order of the delay priorities, the RE occupying a symbol in a temporal domain and occupying a subcarrier in a frequency domain; the base station processes downlink data of each symbol and then sends the downlink data of the symbol to the terminal during processing and sending of downlink data according to the RE allocated to each terminal. Embodiments of the present invention can reduce air-interface delay, and moreover can dynamically reduce uplink and downlink air-interface delays of delay-sensitive user services according to real-time demands of different users.

Description

Radio resource allocation method and device

Technical field

The present disclosure relates to the field of communications, and in particular, to a wireless resource allocation method and apparatus.

Background technique

In the future, wireless systems have higher and higher requirements for air interface and end-to-end delay, such as driverless, industrial control, telemedicine, virtual reality and other applications. The data sent is basically control information and information. The amount is small, but the real-time requirements are very high. The 3rd Generation Partnership Project (3GPP) has explicitly requested to control the air interface delay in R14 (that is, the Packet Data Convergence Protocol (PDCP) layer at the transmitting end to the PDCP layer at the receiving end) within 1 ms. . In order to achieve a lower air gap delay, the design of the new air interface protocol and the chip processing capability of the equipment manufacturer have presented great challenges.

At present, the Long Term Evolution (LTE) system uses a resource block (RB) to allocate radio resources. For 12 consecutive subcarriers in frequency, one slot in the time domain is called 1 RB. The RB resource structure determines that the resource allocation must span all the symbols of the entire RB resource block. Therefore, the transmission and reception of the radio resources need to span the entire slot time, which takes a long time, and the application scenario with strict air interface delay requirements is Said that the resource structure has a greater impact on air interface delay.

Summary of the invention

The wireless resource allocation method and apparatus provided by the embodiments of the present disclosure solve the problem that the air interface delay caused by the radio resource structure is long.

A method for allocating a radio resource according to an embodiment of the present disclosure includes:

The base station determines a delay priority of each terminal;

The base station allocates a resource element (Resource Element, RE) to the corresponding terminal in order of delay priority, wherein the RE occupies one symbol in time and occupies one subcarrier on the frequency;

The base station sends the downlink data of the symbol to the terminal after processing the downlink data of each symbol after processing and transmitting the downlink data according to the RE allocated to each terminal.

Preferably, the delay priority includes an uplink delay priority and a downlink delay priority, and the determining, by the base station, a delay priority of each terminal includes:

The base station sorts each terminal according to the uplink/downlink service real-time priority of each terminal;

If two or more terminals have the same sorting result, the two or more terminals are sorted according to the number of REs of the two or more terminals respectively, and the uplink/downlink delay of each terminal is obtained. priority.

Preferably, the base station sequentially allocates REs to the corresponding terminals according to the order of delay priority from high to low, including:

During the allocation of the RE to the terminal, the base station allocates a corresponding number of REs to the terminal according to the number of REs of the scheduling requirement of the terminal, in the order of the subcarrier index from small to large under the current symbol;

If the number of REs allocated is less than the number of REs required by the scheduling, the terminal allocates REs in order of small to largest according to the symbol index, and in the order of the subcarrier index from small to large in the next symbol, until the terminal allocates REs. The number of REs allocated is equal to the number of REs of the scheduling requirement.

Preferably, the method further comprises:

The base station sends the RE information allocated by the terminal to the terminal according to the uplink delay priority of the terminal, so that the terminal processes and transmits the uplink data of each symbol according to the allocated RE.

A storage medium according to an embodiment of the present disclosure stores a program for implementing the above-described wireless resource allocation method.

A radio resource allocation apparatus according to an embodiment of the present disclosure includes:

a priority determining module, configured to determine a delay priority of each terminal;

a resource unit allocation module, configured to allocate an RE to the corresponding terminal in sequence according to a delay priority, wherein the RE occupies one symbol in time, and one subcarrier is occupied in frequency;

And a data processing and sending module, configured to send downlink data of the symbol to the terminal after processing the downlink data of each symbol after processing and transmitting the downlink data according to the RE allocated to each terminal.

Preferably, the delay priority includes an uplink delay priority and a downlink delay priority, and the priority determining module sorts each terminal according to an uplink/downlink service real-time priority of each terminal, if If two or more terminals have the same sorting result, the two or more terminals are sorted according to the number of REs of the two or more terminals respectively, and the uplink/downlink delay priority of each terminal is obtained. level.

Preferably, when the resource unit allocation module allocates a RE for a certain terminal, according to the RE number of the scheduling requirement of the terminal, under the current symbol, assign the corresponding terminal to the terminal according to the subcarrier index from small to large. The number of REs, if the number of allocated REs is smaller than the number of REs of the scheduling requirement, continues in the order of the symbol index from small to large, and in the next symbol, in descending order of the subcarrier index. The RE is allocated until the number of REs allocated is equal to the number of REs of the scheduling requirement.

Preferably, the data processing and sending module is further configured to send the RE information to the terminal, where the RE information is allocated by the resource unit allocation module according to an uplink delay priority of the terminal, to The terminal processes and transmits uplink data of each symbol according to the allocated RE.

a processor and a memory storing the processor executable instructions;

Wherein, when the processor executes the instruction, the following operations are performed:

Determine the delay priority of each terminal;

Allocating REs to the corresponding terminals in order of delay priority from high to low, wherein the REs occupy one symbol in time and occupy one subcarrier in frequency;

During the processing and transmission of the downlink data according to the RE allocated to each terminal, after the downlink data of each symbol is processed, the downlink data of the symbol is transmitted to the terminal.

Preferably, the delay priority includes an uplink delay priority and a downlink delay priority, and when the processor executes the instruction, performing the following operations:

The RE information allocated to the terminal according to the terminal uplink delay priority is sent to the terminal, so that the terminal processes and transmits the uplink data of each symbol according to the allocated RE.

The technical solution provided by the embodiment of the present disclosure has the following beneficial effects:

Compared with the LTE system, the embodiment of the present disclosure can reduce the air interface delay, and can dynamically reduce the uplink and downlink air interface delay of the delay sensitive user service according to the real-time requirements of different users.

DRAWINGS

FIG. 1 is a block diagram of a method for allocating radio resources according to an embodiment of the present disclosure;

2 is a block diagram of a radio resource allocation apparatus according to an embodiment of the present disclosure;

FIG. 3 is a structural diagram of a radio resource allocation apparatus according to another embodiment of the present disclosure;

4 is a diagram of a radio resource structure and allocation policy of the present disclosure;

FIG. 5 is a comparison diagram of advantages of the present disclosure with respect to an LTE downlink allocation manner;

6 is a comparison diagram of advantages of the present disclosure with respect to an LTE uplink allocation manner;

7 is a diagram of a radio resource allocation strategy of different user queues;

Figure 8 is a general flow chart of Embodiment 1;

9 is a radio resource distribution diagram of Embodiment 1;

10 is a comparison diagram of advantages of Embodiment 1 with respect to an LTE allocation mode;

11 is a diagram showing a radio resource distribution of Embodiment 2.

detailed description

The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

1 is a block diagram of a method for allocating radio resources according to an embodiment of the present disclosure. As shown in FIG. 1, the steps include:

Step S101: The base station determines the delay priority of each terminal.

The delay priority includes an uplink delay priority and a downlink delay priority.

The step S101 includes: the base station sorts each terminal according to the real-time priority of the downlink service of each terminal, and obtains a downlink delay priority of each terminal. The base station obtains the real-time priority of the downlink service in the real-time performance indicator of the service through the real-time performance indicator of the downlink service from the terminal, or waits for the scheduling of the downlink service when the terminal cannot obtain the real-time priority of the downlink service from the terminal. The parameter information of the time and the quality of service determines the real-time priority of the downlink service of the corresponding terminal. Further, if there are two or more terminals having the same downlink service real-time priority, the base station sorts the two or more terminals having the same downlink service real-time priority according to the RE number of the scheduling requirement. Get the downlink delay priority of each terminal.

The step S101 includes: the base station sorts each terminal according to the real-time priority of the uplink service of each terminal, and obtains an uplink delay priority of each terminal. The base station obtains the real-time priority of the uplink service in the real-time performance indicator of the service through the real-time performance indicator of the uplink service from the terminal, or obtains the downlink service from the terminal. When the real-time priority is used, the real-time priority of the uplink service of the corresponding terminal is determined according to the parameter information of the terminal including the scheduling waiting time and the quality of service. Further, if there are two or more terminals having the same uplink service real-time priority, the base station sorts the two or more terminals having the same uplink service real-time priority according to the RE number of the scheduling requirement. Get the uplink delay priority of each terminal.

Step S102: The base station sequentially allocates REs to the corresponding terminals according to the order of delay priority from high to low, wherein the REs occupy one symbol in time and occupy one subcarrier in frequency.

The step S102 includes: when the base station allocates the RE for the terminal, the base station allocates the uplink/downlink delay priority in descending order. During the allocation of the RE for a certain terminal, according to the number of REs of the scheduling requirement of the terminal, under the current symbol, the terminal is allocated a corresponding number of REs according to the subcarrier index from the smallest to the largest, until the current symbol The subcarrier allocation is completed; if the number of allocated REs is smaller than the RE number of the scheduling requirement, the symbol index is in the order of small to large, and in the next symbol, the subcarrier index is continued in the order of small to large. The terminal allocates the RE until the number of allocated REs is equal to the number of REs of the scheduling requirement.

Step S103: The base station sends the downlink data of the symbol to the terminal after processing the downlink data of each symbol during processing and transmitting the downlink data according to the RE allocated to each terminal.

The step S103 includes: after the base station allocates the RE for each terminal according to the downlink delay priority, the base station processes and sends the downlink data to the corresponding terminal according to the allocated RE.

Further, the base station sends the scheduling control information to the corresponding terminal, where the scheduling control information includes RE information, and the RE information is allocated by the base station to the corresponding terminal according to the uplink delay priority of the corresponding terminal. In this way, the corresponding terminal can process and send uplink data of each symbol to the base station according to the RE in the scheduling control information.

It should be noted that, after the downlink data of one symbol is processed by the base station, the downlink data of the processed symbol is sent to the terminal. Similarly, after receiving the uplink data of one symbol, the base station processes the received symbol. Upstream data.

It should be noted that, after receiving the downlink data of one symbol, the terminal processes the received downlink data of the symbol. Similarly, after processing the uplink data of one symbol, the terminal sends the processed symbol to the base station. Upstream data.

The embodiments of the present disclosure are applicable to an Orthogonal Frequency Division Multiple (OFDM) communication system, which provides a radio resource structure and a distribution manner, which can reduce air interface delay.

It will be understood by those skilled in the art that all or part of the steps of the above embodiments may be implemented by a program to instruct related hardware, and the program may be stored in a computer readable storage medium, and the program is executed. When it is, step S101 to step S103 are included. The storage medium may be a ROM/RAM, a magnetic disk, an optical disk, or the like.

2 is a block diagram of a radio resource allocation apparatus according to an embodiment of the present disclosure. As shown in FIG. 2, the method includes: a priority determining module, a resource unit allocating module, and a data processing and sending module.

The priority determination module is used to determine the delay priority of each terminal. Illustratively, the delay priority includes an uplink delay priority and a downlink delay priority, and the priority determining module passes the uplink/downlink service from the terminal in real time. The metric indicator obtains the real-time priority of the uplink/downlink service carried in the metric, or determines the corresponding terminal according to the parameter information including the scheduling waiting time and the QoS of the terminal when the real-time priority of the uplink/downlink service cannot be obtained from the terminal. The uplink/downlink service has a real-time priority, and then each terminal is sorted according to the uplink/downlink service real-time priority of each terminal, and the uplink/downlink delay priority of each terminal is obtained. Further, if two or more terminals have the same uplink/downlink service real-time priority, the priority determining module has the same uplink/downlink service real-time priority according to the RE number of the scheduling requirement. The two or more terminals are sorted to obtain the uplink/downlink delay priority of each terminal.

The resource unit allocation module is configured to allocate a resource unit RE to the corresponding terminal in order according to a delay priority, wherein the RE occupies one symbol in time and occupies one subcarrier in frequency. Illustratively, when the resource unit allocation module allocates a RE for a certain terminal, according to the number of REs of the scheduling requirement of the terminal, under the current symbol, the subcarrier index is in the order of small to large, for the terminal. Allocating a corresponding number of REs until all subcarriers under the current symbol are allocated. If the number of allocated REs is smaller than the number of REs required by the scheduling, the symbol index is in the order of small to large, and under the next symbol, according to The subcarrier index is in a small to large order, and the terminal continues to allocate REs until the number of allocated REs is equal to the number of REs of the scheduling requirement.

And a data processing and sending module, configured to send downlink data of the symbol to the terminal after processing the downlink data of each symbol after processing and transmitting the downlink data according to the RE allocated to each terminal. Illustratively, after the resource unit allocation module allocates the RE for each terminal according to the downlink delay priority, the data processing and sending module processes and transmits the downlink data to the corresponding terminal in units of symbols according to the allocated RE. After the resource unit allocation module allocates the RE to each terminal according to the uplink delay priority, the data processing and sending module sends the allocated RE to the terminal, so that the terminal processes and sends the symbol according to the allocated RE. Downstream data.

Through the radio resource allocation policy provided by the embodiment of the present disclosure, the air interface delay can be reduced. For example, the sender performs user ordering according to the delay priority of the user, and allocates radio resources to the user according to the sorting result using the symbol level resource allocation granularity (non-RB Resource Block resource block manner), and is also adopted at the receiving end. Symbol-level reception and processing mechanisms, which greatly reduce the air interface delay.

FIG. 3 is a structural diagram of a radio resource allocation apparatus according to another embodiment of the present disclosure. As shown in FIG. 3, the high-level application model includes a terminal side, a base station side, and a terminal side. The high-level application model on the terminal side determines the real-time requirements and priorities of the user terminal. The scheduling control unit on the base station side (corresponding to the priority determining module and the resource unit allocating module of the embodiment of FIG. 2) is configured to calculate the real-time priority of each user, and is described in accordance with the present disclosure when a certain subframe resource is allocated. The method performs radio resource allocation and sends it to the physical layer processing unit on the base station side (corresponding to the data processing and transmission module of the embodiment of FIG. 2) for processing. The scheduling control unit on the terminal side is configured to receive the scheduling control information sent by the base station, and control the timing of receiving the downlink data and the uplink sending data, so as to ensure that the downlink receiving is completed and can be sent to the physical layer processing unit for processing.

The terminal user sends the uplink and downlink service real-time indicators to the base station through the air interface signaling according to the type and the demand of the uplink and downlink services. The indicator indicates the real-time priority of the service of the terminal user. The priority parameter can be defined as n levels and levels. Higher means that the real-time priority is higher.

When the service type changes, the uplink and downlink service real-time indicators need to be sent to the base station again. This process is similar to the establishment and release of bearers in the LTE standard.

When the terminal does not support the service type priority feedback, the base station needs to determine the real-time priority of the service of the terminal user according to other parameters, such as the scheduling waiting time of the user, the user Qos parameter, and the like.

The minimum allocation unit of spectrum resources is RE, and each RE occupies one symbol in time and occupies one subcarrier on frequency. The index of each RE is as shown in the radio resource structure and the allocation policy diagram shown in FIG. 4. The primary index is a symbol index, and the secondary index is a subcarrier index. When the wireless spectrum resource is allocated, the primary index is allocated from low to high. The secondary index is allocated from low to high. After the secondary index is allocated, the allocation is started at the level 1 index moving to the higher level until all the RE resource allocation is completed.

It should be noted that the resource allocation policy shown in FIG. 4 refers to the data allocation policy. The invention does not limit the control channel including the uplink and downlink. It is not excluded that the uplink and downlink control channel deployment modes in the LTE standard can still be adopted.

An embodiment of the present disclosure further provides a wireless resource allocation apparatus, including a processor and a memory storing the processor-executable instructions, when the processor executes an instruction, performing the following operations:

Determining the delay priority of each terminal, where the delay priority includes an uplink delay priority and a downlink delay priority, and may be based on the uplink/downlink service real-time priority of each terminal, or the uplink of each terminal. /Real-time priority of the downlink service and the number of REs of the scheduling requirement, determining the uplink/downlink delay priority of each terminal;

According to the order of the uplink/downlink delay priority from high to low, the uplink/downlink RE is allocated to the corresponding terminal in turn, and when the RE is allocated to a terminal, the number of REs according to the scheduling requirement of the terminal is first, under the current symbol. Assigning a corresponding number of REs to the terminal according to a subcarrier index in a small to large order. If the number of allocated REs is smaller than the RE number of the scheduling requirement, the symbol is indexed from small to large in the next symbol. And continuing to allocate the RE according to the subcarrier index in a sequence from small to large until the number of allocated REs is equal to the number of REs of the scheduling requirement;

After processing the downlink data according to the RE allocated to each terminal, after processing the downlink data of each symbol, the downlink data of the symbol is sent to the terminal, so that the terminal receives the downlink data of the symbol and Processing the downlink data of the symbol;

When the processor executes the instruction, the following operations are further performed:

And transmitting, to the terminal, the RE information that is allocated to the terminal according to the terminal uplink delay priority, so that the terminal processes and sends the uplink data of each symbol according to the allocated RE;

The base station receives uplink data of each symbol of the terminal, and processes the received uplink data of each symbol.

5 is a comparison diagram of advantages of the present disclosure with respect to the LTE downlink allocation mode. As shown in FIG. 5, user data (including uplink and downlink data) with high real-time performance is preferentially allocated on low index symbols, and the physical layer preferentially processes this. After the processing is completed, it is immediately sent to the RF port and sent to the receiving end through the air interface. The receiving end only needs to receive the n symbols occupied by the user to receive and start processing. As can be seen from FIG. 4, compared with the RB resource allocation mode of the LTE standard, the RE-level allocation mode adopted by the present disclosure does not need to occupy the entire Slot of the time domain, which greatly saves the air interface. Delay.

For the downlink, as shown in FIG. 5, the time saved by the present disclosure relative to LTE mainly includes two aspects, one side. The face is the PHY processing time of the sender. According to the LTE allocation mode, the physical layer needs to process the data of all users before it can be sent to the air interface. In this patent, the processing time of each user on the transmitting end is different, and the user with high delay priority is preferentially processed and immediately sent to the air interface, which saves most of the physical layer processing time; the other is the air interface of the receiving end. Receiving time, since each terminal user only needs to receive its own data, the user with high delay priority can complete the reception and start processing preferentially, which saves most of the air interface receiving time.

6 is a comparison diagram of advantages of the present disclosure with respect to the LTE uplink allocation mode. As shown in FIG. 6, for the uplink, the time saved by the present disclosure relative to the LTE includes the air interface receiving time of the receiving base station, since each terminal user only needs to send The data of the user data, such as the user data base station with high delay priority, can complete the uplink reception and start processing preferentially, which saves most of the air interface receiving time.

After receiving the real-time performance indicators of the uplink and downlink services of the terminal user, the base station side generates the resource allocation priorities of different terminal users. When allocating a radio spectrum resource in a certain subframe, it is necessary to comprehensively consider the resource allocation priorities of the users that need to be scheduled in the subframe, and perform priority ordering. Each of the uplink and downlink includes a user queue, which are:

A: Downstream delay sensitive user queue

C: uplink delay sensitive user queue

FIG. 7 is a diagram of a radio resource allocation policy of different user queues. As shown in FIG. 7, the downlink delay sensitive user queue is sorted by the downlink delay priority parameter fed back by the user, and the user with the higher priority is ranked in the front. When the spectrum resource is actually allocated, the delay-sensitive user priority is assigned from high to low, starting from symbol 0 to high symbol. For delay-insensitive users, there is no delay requirement and the resource allocation can be performed at the end of the queue.

The uplink delay-sensitive user queue is sorted by the uplink delay priority parameter fed back by the user, and the user with the higher priority is ranked first. When the spectrum resource is actually allocated, the delay-sensitive user priority is from the highest to the bottom. 0 starts to assign to high symbols. For delay-insensitive users, there is no delay requirement, and the resource allocation can be performed at the end of the queue.

When there are two users with the same priority in the queue of the sensitive user, the user with the smaller radio resources needs to be prioritized to allocate more resources. This reduces the impact on users with higher priority and lower priority.

Note: The delay-sensitive user queue designed in this disclosure allocates priority queues for resources of a certain subframe, instead of scheduling priority queues. The scheduling priority queue determines which users are scheduled for a certain subframe. This queue is determined by the user's Qos. (Quality of Service) and other parameter determinations are not within the scope of the present disclosure. The present disclosure relates only to a resource allocation priority queue, which is a priority of resource allocation according to a determined scheduling user after a certain subframe scheduling user determines. Sort.

Exemplary Embodiment 1:

After the UE establishes a connection with the eNodeB, the UE requires a low-latency service type according to the user's own service type, such as a user of the Internet of Vehicles or a sophisticated industrial control service, and may be a bursty service; for an Internet of Things user, this The user-class requirements for the delay are not high, but the requirements for the number of connections are high. The real-time priority of the downlink service of each user in the implementation example 1 is shown in the following Table 1.

Table 1. List of real-time priority of each user's downlink service

实施实例Implementation example	下行业务实时性优先级Downstream business real-time priority	实时性敏感用户Real-time sensitive user	调度需求RE数Scheduling demand RE number
UE1UE1	55	YY	200200
UE2UE2	44	YY	300300
UE3UE3	33	YY	100100
UE4UE4	11	YY	600600
UE5UE5	00	NN	500500
UE6UE6	00	NN	100100
UE7UE7	00	NN	200200
UE8UE8	00	NN	100100
…...	…...	…...	…...

Figure 8 is a general flow chart of Embodiment 1, the exemplary steps are as follows:

Step 1: The terminal users are classified into delay-sensitive users and non-delay-sensitive users according to their service types. Delay-sensitive users need to determine the real-time priority of services according to their real-time service requirements.

Step 2: After the eNodeB receives the delay priority indicator sent by the UE, the priority indicator of each terminal user determines the priority queue scheduled by the TTI, including the delay sensitive user queue and the non-delay sensitive user queue.

For implementation example 1, the delay-sensitive user queue is:

UE1->UE2->UE3->UE4->UE5->UE6->UE7->UE8...

Step 3: The eNodeB performs radio resource allocation of the user according to the delay sensitive user queue of the TTI. FIG. 9 is a radio resource distribution diagram of Embodiment 1. As shown in FIG. 9, UE1 has the highest delay priority, so the priority sub-symbol 0 starts to allocate 200 REs, then UE2 allocates 300 REs, and UE2 occupies part REs of symbols 0 and 1, and sequentially completes resource allocation of all delay-sensitive users.

Step 4: After the delay-sensitive user resource allocation is completed, the remaining resources are used for the radio resource allocation of the non-delay-sensitive user UE5-UE8. As shown in FIG. 7, the resource allocation of all non-delay-sensitive users is completed in sequence until there is no Sufficient resources can be allocated.

Step 5: After the radio resource allocation of the subframe is completed, the data of the downlink scheduling user of the subframe is sent to the physical layer for processing, where the physical layer processing includes all physical layer processing procedures specified in the LTE standard, mainly including scrambling. Encoding, layer mapping and other processes. The data of each symbol processed by the physical layer is immediately sent to the air interface for transmission, and does not need to wait for all symbol processing to be completed before being sent to the air interface. The physical layer processing and the air interface radio transmission are a serial process, and each time a symbol data is processed. It can be sent to the RF transmission immediately, and the continuity of the RF transmission of the air interface needs to be ensured in time.

Step 6: In the downlink receiving process on the end user side, the processing does not need to wait for the entire Slot sequence to complete, and only needs to receive its own downlink data to start the processing layer processing.

Step 7: For the other uplink subframes scheduled by the downlink subframe, the uplink scheduling information of the user is sent to the terminal user by using the uplink control indication, and the physical layer is processed in advance before the air interface time of the terminal user equipment in the target scheduling uplink subframe. The physical layer processing includes all physical layer processing procedures specified in the LTE standard, including scrambling, encoding, Layer mapping and other processes. The data of each symbol processed by the physical layer is immediately sent to the air interface for transmission, and does not need to wait for all symbol processing to be completed before being sent to the air interface. The physical layer processing and the air interface radio transmission are a serial process, and each time a symbol data is processed. It can be sent to the RF transmission immediately, and the continuity of the RF transmission of the air interface needs to be ensured in time.

Step 8: For uplink reception, the base station can start physical layer demodulation processing after receiving data of one user, and does not need to receive data of all users to start physical layer processing.

Step 9: When the terminal service type changes, the high-level application model on the terminal side regenerates a new real-time priority indicator according to the requirements of the new application, and sends it to the base station side.

Step 10: The base station side receives the new real-time indicator of the terminal user, updates the real-time priority parameter of the user, and calculates the real-time priority user queue according to the new parameter when the next time the radio resource is allocated.

FIG. 10 is a comparison diagram of the advantages of the implementation example 1 with respect to the LTE allocation mode. As shown in FIG. 10, by implementing the RB allocation mode of the LTE and the resource allocation manner of the disclosure, the delay-sensitive user UE1-UE4 is used. The time saved is very substantial, and the resource allocation and processing method of the present disclosure greatly reduces the air interface delay.

Exemplary Embodiment 2:

After the UE establishes a connection with the eNodeB, according to the user's own service type, the real-time priority of each terminal user's uplink service in the implementation example 2 is as shown in the following table.

Table 2. List of real-time priority of each user's downlink service

实施实例Implementation example	上行业务实时性优先级Upstream business real-time priority	实时性敏感用户Real-time sensitive user	调度需求RE数Scheduling demand RE number
UE1UE1	55	YY	500500
UE2UE2	55	YY	400400
UE3UE3	55	YY	100100
UE4UE4	55	YY	100100
UE5UE5	55	YY	100100
UE6UE6	00	NN	500500
UE7UE7	00	NN	100100
UE8UE8	00	NN	100100
UE9UE9	00	NN	200200
…...	…...	…...	…...

Step 2: After receiving the delay priority indicator sent by the UE, the eNodeB determines the delay priority queue of the subframe scheduling according to the scheduling user of the subframe and the priority indicator of each terminal user. As shown in the above table, when sorting delay-sensitive users, when the users have the same priority, users with less radio resources need to be prioritized for allocation. Assigned later, this saves time for more users.

For implementation example 2, the delay-sensitive user queue is:

UE5->UE4->UE3->UE2->UE1->UE6->UE7->UE8->UE9...

Step 3: The eNodeB performs radio resource allocation of the user according to the delay-sensitive user queue of the TTI. FIG. 11 is a radio resource distribution diagram of Embodiment 2. As shown in FIG. 11, the UE5 has the highest delay priority, so the priority sub-symbol 0 starts to allocate 100 REs, and then UE4 allocates 100 REs, which in turn completes the resource allocation of all delay-sensitive users.

Step 4: After the delay-sensitive user resource allocation is completed, the remaining resources are used for radio resource allocation of the non-delay-sensitive user. As shown in FIG. 11, the UE6 allocates from the largest symbol, occupies 500 REs, and then continues to allocate the UE7. 100 REs, which complete the resource allocation of all non-delay sensitive users in turn until there are not enough resources to allocate.

Step 5: After the radio resource allocation of the subframe is completed, the data of the TTI downlink scheduling user is sent to the physical layer for processing, where the physical layer processing includes all physical layer processing procedures specified in the LTE standard, mainly including scrambling. Encoding, layer mapping and other processes. The data of each symbol processed by the physical layer is immediately sent to the air interface for transmission, and does not need to wait for all symbol processing to be completed before being sent to the air interface. The physical layer processing and the air interface radio transmission are a serial process, and each time a symbol data is processed. It can be sent to the RF transmission immediately, and the continuity of the RF transmission of the air interface needs to be ensured in time.

Step 7: For the other uplink subframes scheduled by the downlink subframe, the uplink scheduling information of the user is sent to the terminal user by using the uplink control indication, and the physical layer is processed in advance before the air interface time of the terminal user equipment in the target scheduling uplink subframe. The physical layer processing at the physical layer includes all physical layer processing procedures specified in the LTE standard, and mainly includes processes such as scrambling, coding, and layer mapping. The data of each symbol processed by the physical layer is immediately sent to the air interface for transmission, and does not need to wait for all symbol processing to be completed before being sent to the air interface. The physical layer processing and the air interface radio transmission are a serial process, and each time a symbol data is processed. It can be sent to the RF transmission immediately, and the continuity of the RF transmission of the air interface needs to be ensured in time.

In summary, the embodiments of the present disclosure have the following technical effects:

The embodiment of the present disclosure is simple to implement and has precise control. Different from the resource allocation mode and the scheduling policy of the LTE, the method can effectively reduce the air interface delay of the wireless communication system.

Although the present disclosure has been described in detail above, the present disclosure is not limited thereto, and various modifications may be made by those skilled in the art in accordance with the principles of the present disclosure. Therefore, modifications made in accordance with the principles of the present disclosure are to be understood as falling within the scope of the present disclosure.

Industrial applicability

The method and device for allocating radio resources according to the present disclosure can reduce the air interface delay and dynamically reduce the uplink and downlink air interface delay of the delay sensitive user service according to the real-time requirements of different users.

Claims

A method for allocating radio resources, comprising:

The base station determines a delay priority of each terminal;

The base station allocates a resource unit RE to the corresponding terminal in sequence according to the delay priority of the delay priority, wherein the RE occupies one symbol in time and occupies one subcarrier on the frequency;

The base station sends the downlink data of the symbol to the terminal after processing the downlink data of each symbol after processing and transmitting the downlink data according to the RE allocated to each terminal.
The method according to claim 1, wherein the delay priority includes an uplink delay priority and a downlink delay priority, and the determining, by the base station, a delay priority of each terminal includes:

The base station sorts each terminal according to the uplink/downlink service real-time priority of each terminal;

If two or more terminals have the same sorting result, the two or more terminals are sorted according to the number of REs of the two or more terminals respectively, and the uplink/downlink delay of each terminal is obtained. priority.
The method according to claim 2, wherein the base station sequentially assigns REs to the corresponding terminals according to the order of delay priority from high to low:

During the allocation of the RE to the terminal, the base station allocates a corresponding number of REs to the terminal according to the number of REs of the scheduling requirement of the terminal, in the order of the subcarrier index from small to large under the current symbol;

If the number of REs allocated is less than the number of REs required by the scheduling, the terminal allocates REs in order of small to largest according to the symbol index, and in the order of the subcarrier index from small to large in the next symbol, until the terminal allocates REs. The number of REs allocated is equal to the number of REs of the scheduling requirement.
The method of claim 3 further comprising:

The base station sends the RE information allocated by the terminal to the terminal according to the uplink delay priority of the terminal, so that the terminal processes and transmits the uplink data of each symbol according to the allocated RE.
A wireless resource allocation device includes:

a priority determining module, configured to determine a delay priority of each terminal;

The resource unit allocation module is configured to allocate a resource unit RE to the corresponding terminal in order according to a delay priority, wherein the RE occupies one symbol in time and occupies one subcarrier on the frequency;

The data processing and transmitting module is configured to, after processing the downlink data for each symbol according to the RE allocated to each terminal and transmitting the downlink data, send the downlink data of the symbol to the terminal.
The apparatus according to claim 5, wherein the delay priority comprises an uplink delay priority and a downlink delay priority, and the priority determining module is configured according to an uplink/downlink service real-time priority of each terminal. If the two terminals have the same sorting result, the two or more terminals are sorted according to the number of REs of the two or more terminals respectively, and the terminal is obtained. Uplink/downlink delay priority.
The apparatus according to claim 6, wherein the resource unit allocation module allocates a RE for a certain terminal, according to the number of REs of the scheduling requirement of the terminal, in the order of subcarrier indexes from small to large, under the current symbol, For The terminal allocates a corresponding number of REs. If the number of allocated REs is smaller than the RE number of the scheduling requirement, the symbol index is in the order of small to large, and in the next symbol, the subcarrier index is in the order of small to large. And continuing to allocate the RE to the terminal until the number of allocated REs is equal to the number of REs of the scheduling requirement.
The apparatus according to claim 7, wherein the data processing and transmitting module is further configured to send the RE information to the terminal, where the RE information is determined by the resource unit allocation module according to an uplink delay priority of the terminal. The terminal is allocated for the terminal to process and transmit uplink data of each symbol according to the allocated RE.
A wireless resource allocation device includes:

a processor and a memory storing the processor executable instructions;

Wherein, when the processor executes the instruction, the following operations are performed:

Determine the delay priority of each terminal;

The resource unit RE is allocated to the corresponding terminal in sequence according to the priority of the delay priority, wherein the RE occupies one symbol in time and occupies one subcarrier in frequency;

During the processing and transmission of the downlink data according to the RE allocated to each terminal, after the downlink data of each symbol is processed, the downlink data of the symbol is transmitted to the terminal.
The apparatus according to claim 9, wherein the delay priority comprises an uplink delay priority and a downlink delay priority, and when the processor executes the instruction, performing the following operations:

The RE information allocated to the terminal according to the terminal uplink delay priority is sent to the terminal, so that the terminal processes and transmits the uplink data of each symbol according to the allocated RE.
A storage medium, configured to store a program code, the program code for performing the radio resource allocation method according to any one of claims 1 to 4.