CN106714317A - Time-frequency resource allocation method and device of random access process - Google Patents

Abstract

A frequency resource allocation method and device for a random access process provided by the present invention, when a first UE initiates a random access request command, it is judged whether there is an idle frequency resource, and if there is an idle frequency resource, the idle frequency resource is allocated to The first UE; if there is no idle frequency resource, allocate the frequency resource occupied by the second UE to the first UE. The second UE is a UE in the state of service data transmission, that is, the first UE with random access is not idle In the case of frequency resources, the frequency resources of the second UE in the service data transmission state may be preempted. In order to achieve the purpose of improving the access success rate, and then achieve the effect of improving user experience.

Description

A method and device for allocating time-frequency resources in a random access process

technical field

The present invention relates to the technical field of random access, and more specifically, to a method and device for allocating time-frequency resources in a random access process.

Background technique

The random access process plays a key role in the broadband access system based on TD-LTE technology, and is the only strategy for UE (User Equipment, user equipment) to perform RRC (Radio Resource Control, radio resource control) connection establishment, re-establishment, and handover , the purposes of the random access include: firstly, to enable the UE to obtain uplink time synchronization, and secondly, to establish a unique terminal identifier between the network side and the UE. If the number of UEs in the service data transmission state is large at the same time, so that the frequency resources of the broadband access system are all occupied, then there will be no idle frequency resources for the UE that initiates random access. In turn, the access success rate is reduced, resulting in poor user experience.

Contents of the invention

In view of this, the present invention proposes a method and device for allocating time-frequency resources in a random access process, in order to increase the access success rate and improve user experience.

In order to achieve the above purpose, the proposed scheme is as follows:

A frequency resource allocation method for a random access process, comprising:

receiving a random access request command initiated by the first UE;

Judging whether there is an idle frequency resource, if not, acquiring the frequency resource occupied by a second UE, the second UE being a UE in a service data transmission state;

Allocating the frequency resource to the first UE.

Preferably, the method also includes:

Judging whether the signaling process caused by the random access procedure of the first UE ends, and if so, allocating the frequency resource to the second UE.

Preferably, the second UE is specifically:

For a UE in the service data transmission state with a low service priority, the service priority of the UE in the service data transmission state includes low and high.

Preferably, before obtaining the frequency resource occupied by the second UE, the method further includes:

Judging whether the number of times the second UE has been preempted is less than a preset number of times threshold, if so, performing the step of acquiring the frequency resource of the second UE, and recording the number of times of being preempted plus 1.

A frequency resource allocation device for a random access process, comprising:

a receiving unit, configured to receive a random access request command initiated by the first UE;

The first judging unit is used to judge whether there are idle frequency resources, and if not, execute the acquiring unit;

The acquiring unit is configured to acquire frequency resources occupied by a second UE, where the second UE is a UE in a service data transmission state;

a first allocating unit, configured to allocate the frequency resource to the first UE.

Preferably, the device also includes:

The second judging unit is configured to judge whether the signaling process caused by the random access procedure of the first UE ends, and if so, execute the second allocating unit;

The second allocating unit is configured to allocate the frequency resource to the second UE.

Preferably, the acquisition unit is specifically used for:

Obtain frequency resources occupied by a second UE, where the second UE is a UE in a service data transmission state with a low service priority, and the service priority of the UE in the service data transmission state includes low and high service priorities.

Preferably, the device also includes:

A third judging unit, configured to judge whether the number of times the second UE is preempted is less than a preset number threshold before executing the acquiring unit, and if so, execute the acquiring unit and execute the recording unit;

The recording unit is configured to record the preempted count plus 1.

Compared with the prior art, the technical solution of the present invention has the following advantages:

The above technical solution provides a frequency resource allocation method for a random access process. When a first UE initiates a random access request command, it is judged whether there is an idle frequency resource, and if there is an idle frequency resource, the idle frequency resource is allocated to the first UE. One UE; if there is no idle frequency resource, allocate the frequency resource occupied by the second UE to the first UE. The second UE is a UE in the state of service data transmission, that is, the first UE with random access does not have an idle frequency resource. In the case of resources, frequency resources of the second UE in the service data transmission state may be preempted. In order to achieve the purpose of improving the access success rate, and then achieve the effect of improving user experience.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a flow chart of a frequency resource allocation method for a random access process provided by an embodiment of the present invention;

FIG. 2 is a flow chart of another frequency resource allocation method for a random access procedure provided by an embodiment of the present invention;

FIG. 3 is a flow chart of another frequency resource allocation method for a random access procedure provided by an embodiment of the present invention;

FIG. 4 is a schematic diagram of a frequency resource allocation device for a random access process provided by an embodiment of the present invention;

FIG. 5 is a schematic diagram of another frequency resource allocation device for a random access procedure provided by an embodiment of the present invention;

FIG. 6 is a schematic diagram of another frequency resource allocation apparatus for a random access procedure provided by an embodiment of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

This embodiment provides a method for allocating frequency resources in a random access process, as shown in FIG. 1 , the method includes:

Step S11: eNB (Evolved Node-B) receives the random access request command initiated by the first UE;

At the same time, there may be a UE initiating a random access request command and a UE in a service data transmission state in the network. In the present invention, a UE that initiates a random access request command is called a first UE, and a UE in a service data transmission state is called a second UE.

Step S12: the eNB judges whether there are idle frequency resources, if yes, execute step S13, if not, execute step S14.

Step S13: the eNB acquires frequency resources from idle frequency resources and allocates them to the first UE.

If there are idle frequency resources, the eNB allocates idle frequency resources to the first UE;

Step S14: the eNB acquires the frequency resource occupied by the second UE, and the second UE is a UE in a service data transmission state.

Step S15: the eNB allocates the frequency resources occupied by the second UE to the first UE.

If there is no idle frequency resource, the eNB allocates the frequency resource occupied by the second UE to the first UE. That is, the second UE is controlled to stop the service data transmission, and the first UE uses the frequency resources originally occupied by the second UE to perform a random access procedure. The eNB allocates the resource occupied by the second UE to the first UE by responding to the random access request command.

The method for allocating frequency resources in the random access process provided in this embodiment enables the first UE in random access to preempt the frequency resources of the second UE in the state of service data transmission when there is no idle frequency resource. In order to achieve the purpose of improving the access success rate, and then achieve the effect of improving user experience.

This embodiment also provides another frequency resource allocation method for the random access process, as shown in FIG. 2 , the method further includes after step S15:

Step S16: The eNB judges whether the signaling process caused by the random access procedure of the first UE is over, if yes, executes step S17, if not, continues to judge whether the signaling procedure caused by the random access procedure of the first UE ends.

According to the configuration of the existing 36.311 protocol, logical channels are divided into 0~15, among which 0, 2 correspond to SRB0, SRB1 and SRB2 respectively, 3~10 correspond to DRB (data radio bearer, data radio bearer), and others are reserved values. In the signaling process caused by the random access process of the first UE, the last piece of air interface signaling is the uplink information transmission information (carrying the completion instruction) initiated by the UE and carried on SRB2 because of the random access initiated by the establishment of the RRC connection; For random access initiated by RRC connection reestablishment or handover, the last piece of air interface signaling is the RRC connection reconfiguration complete message initiated by the UE, which is carried on SRB1.

In the method of this embodiment, the eNB identifies the last piece of air interface signaling initiated by the UE through logical channel number 1 or 2, and identifies the transmission DRB through logical channels 3-10. And monitor the uplink or downlink RLC buffer situation of the first UE, and/or, the transmission DRB situation, when the number of times the uplink or downlink PLC (Radio Link Control, radio link layer control protocol) buffer is empty reaches a preset first threshold , or when the number of times the DRB is transmitted reaches a preset second threshold, it is determined that the signaling procedure triggered by the random access procedure of the first UE ends. Preferably, the first threshold is a positive integer greater than 5, and the second threshold is a positive integer smaller than 5.

Step S17: the eNB allocates the frequency resource occupied by the first UE to the second UE.

The eNB allocates the resource occupied by the second UE to the first UE through the response of the random access request command, and sets the CFI in the PCFICH (Physical Control Format Indicator Channel) from the next radio frame ( Control Format Indicator (Control Format Indicator) is 3, notifying the first UE and the second UE that both the uplink resource and the downlink resource of the current radio frame are used to transmit the signaling interaction information caused by the random access procedure of the first UE. Until the signaling process caused by the random access procedure of the first UE ends, the eNB sets the CFI to 0, returns the frequency resource preempted by the first UE to the preempted second UE, and resumes the service data transmission of the second UE.

For the second UE, if the parsed CFI is 3, it means that the uplink resources and downlink resources of the current wireless frame are preempted by the first UE, and its own business data transmission is suspended; until the parsed CFI is 0, its own business data transmission is resumed .

For the first UE, if the analytical CFI is 3, it means that both the uplink resource and the downlink resource of the current radio frame are used to transmit the signaling interaction information caused by its own random access process, and perform the random access process; until the analysis When the CFI is 0, the occupied frequency resources are exited.

That is, after the signaling process caused by the random access procedure of the first UE ends, the frequency resource is returned to the preempted second UE, and service data transmission of the second UE is resumed. In this way, the preempted second UE does not need to re-queue to wait for scheduling, thereby reducing the data transmission delay of the second UE.

Priority division may also be performed on UEs in a service transmission state. Preferably, different priorities are classified according to different service types. When performing resource preemption, the first UE only preempts the resources occupied by the second UE whose service priority is low. Those skilled in the art can freely pre-set the types of low-level and high-level business priorities according to actual needs, that is, the specific division of low-level and high-level business priorities is not limited in the present invention.

This embodiment also provides another method for frequency resource allocation in the random access process. The method also presets the maximum number of times the second UE is preempted, which means that between each frequency resource allocation authorization and the frequency resource release authorization, it is used by other UEs. The maximum number of times the UE preempts resources. In order to avoid interrupting the service data transmission of the same UE multiple times, as shown in FIG. 3, steps S21, S23, and S26 are the same as steps S11, S13, and S15 respectively. The method includes:

Step S21: eNB (Evolved Node-B) receives the random access request command initiated by the first UE;

Step S22: the eNB judges whether there are idle frequency resources, if yes, execute step S23, if not, execute step S24.

Step S23: the eNB acquires frequency resources from idle frequency resources and allocates them to the first UE.

Step S24: the eNB judges whether there is a second UE that has been preempted for a number of times less than the preset threshold, and if so, executes step S25.

The second UE is a UE in a service data transmission state, or a UE in a service data transmission state with a low service priority.

Step S25: the eNB acquires the frequency resource of the second UE, and records the number of times the second UE is preempted plus 1.

Step S26: the eNB allocates the frequency resources occupied by the second UE to the first UE.

This embodiment also provides a frequency resource allocation device for a random access process, as shown in FIG. 4, the device includes:

The receiving unit 11 is configured to receive a random access request command initiated by the first UE;

The first judging unit 12 is configured to judge whether there is an idle frequency resource, if yes, execute the first acquiring unit 13, and if not, execute the acquiring unit 14;

The first obtaining unit 13 is configured to obtain frequency resources from idle frequency resources and allocate them to the first UE.

The obtaining unit 14 is configured to obtain frequency resources occupied by a second UE, where the second UE is a UE in a service data transmission state.

The first allocating unit 15 is configured to allocate the frequency resource to the first UE.

The device for allocating frequency resources in the random access process provided in this embodiment enables the first UE in random access to preempt the frequency resources of the second UE in the state of service data transmission when there is no idle frequency resource. In order to achieve the purpose of improving the access success rate, and then achieve the effect of improving user experience.

This embodiment also provides another device for allocating frequency resources in the random access process, as shown in FIG. 5, the device further includes:

The second judging unit 16 is configured to judge whether the signaling process caused by the random access procedure of the first UE ends, and if so, execute the second allocating unit 17;

The second allocation unit 17 is configured to allocate the frequency resource to the second UE.

The acquisition unit 14 is specifically used for:

Obtain frequency resources occupied by a second UE, where the second UE is a UE in a service data transmission state with a low service priority, and the service priority of the UE in the service data transmission state includes low and high service priorities.

This embodiment also provides another device for allocating frequency resources in the random access process, as shown in FIG. 6, the device further includes:

The third judging unit 18 is configured to judge whether the number of times the second UE is preempted is less than a preset number threshold before executing the acquiring unit 14, and if so, execute the acquiring unit 14 and execute the recording unit 19;

The recording unit 19 is configured to record the preempted count plus 1.

As for the device embodiment, since it basically corresponds to the method embodiment, for related parts, please refer to the description of the method embodiment. The device embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in One place, or it can be distributed to multiple network elements. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. It can be understood and implemented by those skilled in the art without creative effort.

In this document, relational terms such as first and second etc. are used only to distinguish one entity or operation from another without necessarily requiring or implying any such relationship between these entities or operations. Actual relationship or sequence. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above description of the disclosed embodiments of the present invention enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. a kind of frequency resource allocation method of random access procedure, it is characterised in that including：

Receive the random access request order of UE initiations；

Idle frequence resource is judged whether, if it is not, then obtaining the frequency resource that the 2nd UE takes, the 2nd UE is one UE in business data transmission state；

A UE is given by the frequency resource allocation.

2. method according to claim 1, it is characterised in that methods described, also includes：

Judge whether the signaling process that the random access procedure of a UE triggers terminates, if so, then by the frequency resource Distribute to the 2nd UE.

3. method according to claim 1, it is characterised in that the 2nd UE, specially：

One service priority in business data transmission state is rudimentary UE, the UE's in business data transmission state Service priority includes rudimentary and senior.

4. the method according to claims 1 to 3 any one, it is characterised in that obtaining the frequency money that the 2nd UE takes Before source, also include：

Judge that whether the 2nd UE's is preempted number of times less than preset times threshold value, if so, then perform described obtaining described the The step of frequency resource of two UE, and be preempted number of times and plus 1 described in recording.

5. the frequency resource allocation device of a kind of random access procedure, it is characterised in that including：

Receiving unit, for receiving the random access request order that a UE is initiated；

First judging unit, for judging whether idle frequence resource, if it is not, then performing acquiring unit；

The acquiring unit, for obtaining the frequency resource that the 2nd UE takes, the 2nd UE is one and is passed in business datum The UE of defeated state；

First allocation unit, for giving a UE by the frequency resource allocation.

6. device according to claim 5, it is characterised in that described device, also includes：

Whether the second judging unit, the signaling process that the random access procedure for judging a UE triggers terminates, if so, Then perform the second allocation unit；

Second allocation unit, for giving the 2nd UE by the frequency resource allocation.

7. device according to claim 5, it is characterised in that the acquiring unit, specifically for：

The frequency resource of the 2nd UE occupancy is obtained, the 2nd UE is a service priority in business data transmission state It is rudimentary UE, the service priority of the UE in business data transmission state is including rudimentary and senior.

8. the device according to claim 5~7 any one, it is characterised in that described device, also includes：

3rd judging unit, for before the acquiring unit is performed, judging that the 2nd UE's is preempted whether number of times is less than Preset times threshold value, if so, then performing the acquiring unit, and performs recording unit；

The recording unit, described be preempted number of times and plus 1 for recording.