CN107222827B - Random access configuration method and device, anytime access method, base station and UE - Google Patents

Abstract

This embodiment discloses a random access configuration method and device, a random access method, a base station, and a UE; the random access configuration method includes: dividing user equipment UE groups; each UE group includes at least two UEs; Allocate a random access sequence for each of the UE groups; set a random access priority for the UEs in each UE group; set a preset specific threshold, wherein the preset specific threshold is used when the base station receives When the random access request carries the random access sequence, determine whether to notify the UE to request random access according to the priority.

Description

Random access configuration method and device, anytime access method, base station and UE

technical field

The present invention relates to the field of wireless communication, and in particular, to a random access configuration method and device, a random access method, a base station, and user equipment (User Equipment, UE).

Background technique

With the rapid development of the Internet of Things, Machine to Machine (M2M), as the most important application form of the Internet of Things at the current stage, will inevitably introduce a large number of M2M services and a large number of M2M terminals, which will bring a lot to the wireless network. It brings huge pressure and challenges, such as random access congestion, excessive paging overhead, and inefficient transmission of a large number of micro-information packets. Therefore, making full use of the delay tolerance characteristics and service group characteristics of M2M terminals, more efficient use of random access resources of the LTE network, and improving the overall throughput of the network have become a current research focus.

In order to avoid the congestion caused by the massive access of devices, the prior art proposes a solution based on the code division multiple access technology to realize simultaneous access of different devices. The method includes: when the IoT device has an uplink access requirement, using a random access resource pre-allocated to the device group where the IoT device is located (such as a random access preamble sequence and/or a random access resource) frequency resource block) to initiate a random access request; the base station allocates uplink resources and first temporary identifiers for the device groups corresponding to the random access resources used by the random access request, and responds feedback through random access; Randomly selects the mapping code in the Mapping Code, maps the uplink message to the allocated uplink resources by means of code division multiple access according to the selected mapping code, and carries the first temporary identifier and the mapping code in the uplink message at the same time; the base station receives the uplink message Then, each mapping code in the codebook is used in turn to detect the received uplink message of the IoT device, and after the detection is correct, a conflict resolution message is returned to the IoT device by means of code division multiple access, and the conflict resolution message includes a third temporary identifier; After receiving the confirmation message from the IoT device, the third temporary identifier is set as the cell wireless network temporary identifier of the IoT device.

Although the existing technology can reduce the collision probability when a large number of Internet of Things devices are connected and improve the access efficiency, the number of devices that can be accessed at the same time by this method is limited by the size of the codebook, which may not be possible when a large number of devices are connected. Applicable; in addition, most IoT devices pursue simplicity, but this method requires the device to store all coding sequences, which increases the complexity of the device.

SUMMARY OF THE INVENTION

In view of this, the main purpose of the present invention is to provide a random access configuration method and device, a random access method, a base station and a UE to at least partially solve the problem of severe random access collision and/or limited capacity.

In order to achieve the above object, the technical scheme of the present invention is achieved in this way:

A first aspect of the embodiments of the present invention provides a random access configuration method, including:

Divide user equipment UE groups; each UE group includes at least two UEs;

assigning a random access sequence to each of the UE groups;

Set the priority of random access for the UEs in each UE group;

A preset specific threshold is set, wherein the preset specific threshold is used to determine whether to notify the UE to request random access according to the priority when the base station receives a random access request carrying the random access sequence.

Based on the above solution, the division of user equipment UE groups includes:

The UE groups are divided according to service types and/or geographic locations of the UEs.

Based on the above solution, the setting of the random access priority for the UEs in each UE group includes:

The priority is determined according to the service delay tolerance characteristic and/or subscription information of the UE.

A second aspect of the embodiments of the present invention provides a random access method, including:

The base station receives the first information that is sent by the UE and carries the first random access sequence;

The base station determines whether the received signal strength of the first information is greater than a preset specific threshold;

When the received signal strength is greater than the preset specific threshold, the base station sends second information to the UE; wherein the second information is used to notify the UEs in the first UE group that send the first information Random access is requested by priority.

Based on the above scheme, the method further includes:

The method also includes:

receiving, by the base station, third information sent by a UE in the first UE group based on the second information;

The base station sends fourth information based on the third information, wherein the fourth information carries at least one piece of uplink resource information; the uplink resource information is allocated to the first UE group except for sending the third information Resource information for uplink transmission performed by other UEs other than the UE.

Based on the above solution, the fourth information further carries the first uplink data received from the third information, which is used to inform the UE that the base station has successfully received the first uplink data, so as to avoid redundant transmission.

Based on the above scheme, the method further includes:

When the base station fails to receive the third information, the base station reserves retransmission resources for the UE that sends the third information.

Based on the above scheme, the method further includes:

When the retransmission mechanism of the UE is adaptive retransmission, the base station sends an uplink grant indication to the UE to indicate the retransmission resource.

Based on the above scheme,

The method also includes:

When the retransmission mechanism of the UE is non-adaptive retransmission, the base station uses a physical hybrid automatic retransmission indication channel to indicate reception failure or indicates reception failure through the content of the sent fourth information.

Based on the above scheme, the method further includes:

The base station determines that there is UE information that sends UE information that carries the first information of the first random access sequence within a first time;

The base station notifies the UE group corresponding to the first random sequence of the UE information requiring random access, wherein the UE information is used by the UE to determine the random access sequence in combination with the priority.

Based on the above solution, the base station determines that there is UE information that sends UE information carrying the first information of the first random access sequence within a first time, including:

receiving, by the base station, a demand identifier sent on a predetermined resource by a UE with a random access demand;

The base station determines, according to the received demand identifier, that there is UE information that sends the first information carrying the first random access sequence within the first time.

A third aspect of the embodiments of the present invention provides a random access method, wherein a first user equipment UE sends first information carrying a first random access sequence; wherein the first random access sequence is the first UE the random access sequence shared by all UEs in the first UE group;

receiving, by the first UE, second information sent by the base station based on the first information;

determining, by the first UE, whether there are multiple UEs requesting random access by using the first random access sequence according to the second information;

When multiple UEs request random access by using the first random access sequence, the first UE waits for random access according to the priority of the first UE.

Based on the above scheme, the method further includes:

receiving, by the first UE, the fourth information sent by the base station;

If the fourth information carries the uplink data preset to be sent by the first UE, the first UE stops waiting for random access, and ends the current random access.

Based on the above scheme, the method further includes:

receiving, by the first UE, UE information sent by the base station for requesting random access by using the first random access sequence within a first time;

The first UE determines a random access sequence according to the UE information and the priority of the first UE.

Based on the above scheme, the method further includes:

The first UE sends a demand identifier for requesting random access on a predetermined resource, where the demand identifier is used by the base station to determine that there is a request for random access by using the first random access requirement within the first time. UE information.

Based on the above solution, the first UE waits for random access according to the priority of the first UE, including:

The first UE detects the fourth information sent by the base station; wherein the fourth information at least includes resource information of one uplink resource;

The first UE calculates the number of uplink resources allocated in the received fourth information, and determines, according to the priority of the first UE, whether the uplink resources allocated in the fourth information are for the first UE to send Uplink resources for uplink data.

A fourth aspect of the embodiments of the present invention provides a random access configuration device, including:

a dividing unit for dividing user equipment UE groups; each UE group includes at least two UEs;

a first allocation unit, configured to allocate a random access sequence to each of the UE groups;

a first setting unit, configured to set the priority of random access for the UEs in each UE group;

The second setting unit is configured to set a preset specific threshold, where the preset specific threshold is used to determine whether to notify the UE of whether to notify the UE according to the random access request when the base station receives the random access request carrying the random access sequence. Priority requests random access.

Based on the above solution, the dividing unit is specifically configured to divide the UE group according to the service type and/or geographical location of the UE.

Based on the above solution, the first setting unit is specifically configured to determine the priority according to the service delay tolerance characteristic and/or subscription information of the UE.

An embodiment of the present invention provides a base station, including:

a first receiving unit, configured to receive the first information that is sent by the UE and that carries the first random access sequence;

a judgment unit, configured to judge whether the received signal strength of the first information is greater than a preset specific threshold;

a first sending unit, configured to send the second information to the UE when the received signal strength is greater than the preset specific threshold; wherein the second information is used to notify the UEs in the first UE group to prioritize level to request random access.

Based on the above solution, the first receiving unit is further configured to receive third information sent by the UE based on the second information;

The first receiving unit is further configured to receive third information sent by UEs in the first UE group based on the second information;

The first sending unit is further configured to send fourth information based on the third information, wherein the fourth information carries at least one uplink resource information; the uplink resource information is allocated to the first UE Resource information for uplink transmission performed by other UEs in the group except the UE that sends the third information.

Based on the above solution, the fourth information further carries the first uplink data received from the third information, which is used to inform the UE that the base station has successfully received the first uplink data, so as to avoid redundant transmission.

Based on the above solution, the base station further includes:

The second allocating unit is further configured to reserve retransmission resources for the UE that sends the third information when the base station fails to receive the third information.

Based on the above solution, the first sending unit is further configured to send an uplink grant indication to the UE to indicate the retransmission resource when the retransmission mechanism of the UE is adaptive retransmission.

Based on the above solution, the first sending unit is further configured to, when the retransmission mechanism of the UE is non-adaptive retransmission, use the physical hybrid automatic retransmission indication channel to indicate a failure to receive or to pass the transmission of the fourth information sent. Carry content to indicate reception failure.

Based on the above solution, the base station further includes:

a first determining unit, configured to determine that there is UE information that sends UE information that carries the first information of the first random access sequence within a first time;

The first sending unit is further configured to notify the UE group corresponding to the first random sequence of the UE information requiring random access, wherein the UE information is used for the UE to determine random access in combination with the priority. into the order.

Based on the above solution, the first determining unit is specifically configured to receive a demand identifier sent by a UE with a random access requirement on a predetermined resource; according to the received demand identifier, determine that there is a transmission carrying the UE information of the first information of the first random access sequence.

A sixth aspect of the embodiments of the present invention provides a user equipment UE, where the UE is a first UE;

a second sending unit, configured to send first information carrying a first random access sequence; wherein the first random access sequence is a random access shared by all UEs in the first UE group where the first UE belongs sequence;

a second receiving unit, configured to receive the second information sent by the base station based on the first information;

a second determining unit, configured to determine, according to the second information, whether multiple UEs use the first random access sequence to request random access;

The processing unit is configured to wait for random access according to the priority of the first UE when multiple UEs request random access by using the first random access sequence.

Based on the above solution, the second receiving unit is further configured to receive the fourth information sent by the base station;

The processing unit is configured to stop waiting for random access and end the current random access if the fourth information carries the uplink data preset to be sent by the first UE.

Based on the above solution, the second receiving unit is further configured to receive UE information sent by the base station for requesting random access by using the first random access sequence within a first time;

The processing unit is specifically configured to determine a random access sequence according to the UE information and the priority of the first UE.

Based on the above solution, the second sending unit is further configured to send a demand identifier for requesting random access on a predetermined resource, where the demand identifier is used by the base station to determine that the first random access is available within the first time. The access requirement requests UE information of random access requirement.

Based on the above solution, the processing unit is further configured to detect fourth information sent by the base station; wherein, the fourth information includes resource information of at least one uplink resource; for the uplink resource allocated in the received fourth information The number is calculated, and according to the priority of the first UE, it is determined whether the uplink resources allocated in the fourth information are uplink resources for the first UE to send uplink data.

In the random access configuration method and device, the random access method, the base station, and the UE provided by the embodiments of the present invention, the UEs are grouped. A UE is set with a priority. When a random access conflict occurs, the base station sends a message to the UE to instruct the UEs in the same group to perform random access according to the priority, which can obviously reduce the conflict of random access, and can alleviate the random access conflict. The limitation of the maximum capacity of the UE is caused by the limited number of access sequences.

Description of drawings

FIG. 1 is a schematic flowchart of a random access configuration method according to an embodiment of the present invention;

FIG. 2 is a schematic flowchart of a first random access method provided by an embodiment of the present invention;

3 is a schematic flowchart of a second random access method according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a first base station according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a second base station according to an embodiment of the present invention;

6 is a schematic structural diagram of a UE according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a RAR PDU according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of an uplink transmission resource according to an embodiment of the present invention;

FIG. 9 is a schematic flowchart of a third random access method according to an embodiment of the present invention;

10 is a schematic flowchart of a fourth random access method according to an embodiment of the present invention;

11 is a schematic flowchart of a fifth random access method according to an embodiment of the present invention;

12 is a schematic flowchart of a sixth random access method according to an embodiment of the present invention;

FIG. 13 is a schematic flowchart of a seventh random access method according to an embodiment of the present invention.

Detailed ways

Example 1:

As shown in FIG. 1 , this embodiment provides a random access configuration method, including:

Step S110: Divide user equipment UE groups; each UE group includes at least two UEs;

Step S120: Allocate a random access sequence to each of the UE groups;

Step S130: Set a random access priority for the UEs in each UE group;

Step S140: Set a preset specific threshold, where the preset specific threshold is used to determine whether to notify the UE to request a random access request according to the priority when the base station receives a random access request carrying the random access sequence access.

The random access configuration method provided in this embodiment may be a random access resource configuration method applied to a base station; it may also be a method applied to a network side device such as a mobility management entity or a wireless management controller.

In this embodiment, at least two UEs are divided into one UE group, and each UE group is assigned a common random access sequence, and all UEs in the UE group use the random access sequence for random access .

In this embodiment, a priority is also set for each UE in the same UE group, and the priority is used for when multiple UEs need to request access at the same time, the priority is used for the UE to use the random access of the group. Access sequence The priority order of random access. Generally, the higher the priority in this embodiment, the right to preferentially use the random access sequence of this group to perform random access when multiple UEs collide.

In this embodiment, the base station will also set a preset specific threshold, and the threshold can be used by the base station to detect whether there are currently two or more UEs requesting random access at the same time. Usually, the power consumption that the terminal can provide is limited, and the signal strength sent by the terminal each time is also limited. If the received signal strength received by the current base station is very strong and exceeds the signal strength sent by one terminal, it means that there are currently multiple UEs at the same time. When requesting access, there is a conflict of random access requests. In order to detect such a conflict, a preset specific threshold is set in this embodiment.

In this embodiment, the UE grouping is used to limit the number of UEs that use a random access sequence at the same time, which can effectively avoid overcrowding caused by too many UEs using the same random access sequence to request access in the prior art, and In this embodiment, a priority is also set, and when a conflict occurs, the UE will be notified to request access again according to the priority, which can reduce the phenomenon of backing off but re-conflicting after backing off in the prior art. Obviously, it can It can effectively reduce the collision phenomenon, and at the same time, it can also reduce the limitation of the number of UEs allowed to access due to the limited number of random access sequences.

As a further improvement of this embodiment, the step S110 includes:

The UE groups are divided according to service types and/or geographic locations of the UEs.

In this embodiment, the UE grouping is performed according to the service type of the UE, which may include: dividing UEs of the same service type into one UE group, for example, multiple detection terminals deployed in a deep forest. These detection terminals can be used to detect forest fire prevention information or carry out fire warning. At this time, the service types of multiple detection terminals are the same. If these UEs are located in the same area of the forest, at this time, if multiple UEs in the UE group detect that the forest is on fire, the fire will be completed through random access. The alarm is transmitted, and the network side receives a fire alarm. The multiple UEs can be divided into one UE group, and a random access sequence is used for random access. As long as the data transmission of one UE is successful, the network side obtains the corresponding information, and the random access configuration method of this embodiment is adopted. , compared with the prior art in which each UE performs random access, the problem of large fire alarm transmission delay due to random access conflict can be adhered to.

Of course, in specific implementation, the division of UE groups according to service types of the UEs may also include: dividing UEs of different service types into one UE group as much as possible. Because different types of services have different requirements for latency, it is convenient for UEs with low latency requirements. For example, the priority setting for UEs with low latency requirements is slightly lower, which is convenient to implement The differentiation of priorities, on the one hand, reduces conflicts as much as possible, and on the other hand, ensures that UEs use the random access sequence of the UE group to perform random access as much as possible at each time point, thereby improving the effective utilization of random access sequences. . Of course, dividing UEs of different service types into one UE group does not mean that no two UEs in one UE group have the same service types. Just try to differentiate the service types within a UE group as much as possible. It is worth noting that a UE may correspond to different service types. For example, the service types of UE A include service A and service B. In this embodiment, the UE A may be divided into two UE groups. For example, service A of UE A is divided into UE group A, and Service B of UE A is divided into UE group B. In this case, when there is a demand for random access to service A of UE A, the random access sequence of UE group A will be used to request random access.

Here, grouping UEs according to geographic locations may include: dividing UEs distributed in the same grouping area into one UE grouping according to the geographic locations, so that the base station can allocate a random access sequence to different locations through spatial multiplexing. The UE grouping in the grouping area maximizes the effective utilization of the random access sequence. Of course, in a specific implementation process, the base station will also allocate a group radio resource network temporary identifier to each UE group to distinguish each group. When making a random access request, the UE may carry the random access sequence of the group and the temporary identifier of the group radio resource network at the same time. Of course, in specific implementation, the base station can determine which UE group sends the random access request according to the direction of the received signal carrying the random access sequence, and can also realize the multiplexing of the random access sequence by space division multiplexing.

The above only provides two examples of how to group UEs according to service types and geographic locations. The specific implementation is not limited to the above methods. The UE is not only located in a grouping area, but also realizes the differentiation of service types as much as possible. For another example, the grouping can be performed according to the subscription information of the UE, and the subscription information can be the information signed between the communication identifier of the UE and the communication operator that can characterize the level of the communication identifier that the UE operates. UE grouping may be performed according to subscription information. For example, UEs with different levels are allocated to a UE group as much as possible, so as to achieve differentiated priority setting as much as possible in step S130, reduce conflicts and improve the effective utilization of random access sequences.

Further, the step S130 may include:

The priority is determined according to the service delay tolerance characteristic and/or subscription information of the UE.

Obviously, different services have different delay tolerance characteristics. Generally, a service with higher delay tolerance characteristics can have a lower priority. The subscription information can be used to characterize the level of the UE. The higher the level, the higher the requirements for communication quality may be. At this time, a higher priority may need to be set. In this embodiment, it can be tolerated according to the delay. at least one of characteristics and subscription information to determine priority.

Of course, in the specific implementation process, after the base station completes the settings from step S110 to step S140, it needs to send the UE grouping result, random access sequence, priority and other information to the UE to facilitate the UE to know which UE it is currently in. group information. The base station may send the above information by means of broadcast, multicast or unicast, preferably broadcast or multicast, so as to reduce the number of times the base station sends the above information and the occupied communication resources. In this embodiment, the grouping information, the priority and the random access sequence of the UE group are sent by using the Physical Downlink Control Channel (PDCCH) or Radio Resource Control (Radio Resource Control, RRC) information.

The random access configuration method provided in this embodiment may be a semi-static configuration method or a dynamic configuration method. For example, some M2M terminals are fixedly set, and their geographic location rarely shifts once set, while some terminals are mobile. In this embodiment, a dynamic configuration method may be adopted, for example, periodic reallocation of UE groups is performed.

In a word, the random access configuration method provided in this embodiment, through the above configuration, can reduce the collision rate of random access, reduce the access capacity caused by the random access sequence, and at the same time realize more effective use of the random access sequence.

In addition, in a specific implementation process, the method further includes: according to the number of UEs in each UE group, allocating predetermined resources, and the predetermined resources can be used for each UE to send a demand identifier when there is a random access demand, so as to facilitate the base station The information of UEs that simultaneously send random access requests within the first time is counted; for further convenience, the UE determines its own random access sequence according to its own priority and the information of UEs that send random access requests within the first time.

Embodiment 2:

As shown in FIG. 2, this embodiment provides a random access method, including:

Step S210: the base station receives the first information carrying the first random access sequence sent by the UE;

Step S220: the base station determines whether the received signal strength of the first information is greater than a preset specific threshold;

Step S230: when the received signal strength is greater than the preset specific threshold, the base station sends second information to the UE; wherein the second information is used to notify the UE in the first UE group that sends the first information. The UE requests random access according to priority.

The random access method described in this embodiment is a random access method applied to a base station. The first information is received in step S210, where the first information may be Msg1 carrying the random access request. For the information format or information resources of Msg1 here, reference may be made to the prior art, which will not be described in detail here.

After the base station receives the first information, the received signal strength of each random access sequence can be determined by decoding the information. If the received signal strength of the first random sequence is greater than a preset specific threshold, the base station can consider that there are currently two UEs at the same time. or two or more UEs request random access at the same time, in order to resolve the current conflict, the base station may use broadcast to send the second information through step S230, or may send the second information multicast, or may send the second information unicast. 2. Information. In a word, the second information sent in the step S230 at least needs to ensure that the UE that sends the first information carrying the first random sequence can receive the second information, so as to realize the notification of the first UE group needs Random access requests sent according to priority. In this embodiment, the second information may be Msg2a. The Msg2a carries a special field. When the UEs of the first UE group receive and decode the second information, and after extracting the special field, it is considered that there are two or more UEs using the first random The access sequence requests access, and subsequent random access needs to be performed according to the priority. In this embodiment, the first random access sequence may be any random access sequence allocated by the base station to the UE.

After receiving the second information, the UE with lower priority will avoid the UE with higher priority, so that the UE with higher priority will preferentially use the first random access sequence to perform subsequent random access, Thus, collision of random access is avoided.

After receiving the second information, the UE with high priority will send the third information to the base station, request random access, and establish an RRC connection. In a specific implementation process, the third information may include an RRC connection request message, or may be a buffer status report (Buffer Status Report, BSR) and/or uplink data. In this embodiment, the third information may be sent by using Msg3a similar to Msg3 in the prior art.

The method also includes:

The base station receives third information sent by the UEs in the first UE group based on the second information;

The base station sends fourth information based on the third information, wherein the fourth information carries at least one uplink resource information; the uplink resource information is allocated to the first UE group except for the UE that sends the third information Resource information for uplink transmission by other UEs. In this embodiment, when the base station sends the fourth information, it may be broadcast transmission, and at this time, the fourth information is sent to all UEs within the coverage of the base station; it may also be sent by multicast. , may be sent to all UEs in the first UE group, may be sent only to UEs that send the first information, or may be unicast sent only to UEs that need to receive the fourth information. In this embodiment, broadcast transmission or multicast transmission is preferred.

In this embodiment, the base station will receive the third information sent by the UE after receiving the second information, and send the fourth information after receiving the third information. The fourth information here includes uplink resource information of at least one uplink resource for other UEs to transmit uplink data. For example, after receiving the second information, the current UE B has completed random access by sending the third information, and has sent its own uplink data or BSR to the base station. In this case, the base station can notify other UEs through the fourth information. According to the priority, random access and uplink data transmission are performed by using the uplink resource information carried in the fourth information. In a specific implementation process, the fourth information may also carry two or more pieces of uplink resource information, and one piece of the uplink resource information corresponds to one uplink transmission resource, and the UEs of a UE group can use their respective priorities according to their respective priorities. and the time sequence of each uplink transmission resource to determine which uplink transmission resource each uses to send data. Generally, a UE with a higher priority sends uplink data by using an uplink transmission resource with an earlier time to complete random access.

In this embodiment, the fourth information further carries the first uplink data received from the third information, which is used to inform the UE that the base station has successfully received the first uplink data, so as to avoid redundant transmission.

The base station carries the first uplink data received from the third information into the fourth information, so that the UE preparing to send the information will extract the first uplink data from the fourth information. If the UE finds the first uplink data, it is If the data that it needs to send to the base station has been received by the base station, the UE can stop sending the first uplink data, so as to avoid redundant transmission of the UE and redundant reception of the base station, and can avoid the communication resources occupied by the redundant transmission, and redundant reception occupy the system resources of the base station.

The method also includes:

If the base station fails to receive the third information, the base station reserves retransmission resources for the UE that sends the third information.

For example, if the base station here fails to receive the third information, including not receiving the information on the uplink resources allocated to the UE, or the bit error rate of the received information is too large, which causes the reception to fail, then it sends the third information. The UE of the third message reserves retransmission resources to facilitate the retransmission of the information content in the third message.

In the specific implementation process, retransmission is divided into adaptive retransmission and non-adaptive retransmission. There are two cases below, which are received respectively, and the base station performs different processing for two different retransmission mechanisms.

The method also includes:

When the retransmission mechanism of the UE is adaptive retransmission, the base station sends an uplink grant indication to the UE to indicate the retransmission resource.

For adaptive retransmission, when reserving retransmission resources, the base station needs to perform uplink (Uplink, UL) authorization Grant to re-allocate an uplink resource, and send the uplink authorization instruction to the corresponding UE to Instruct the UE to retransmit on the uplink resource. In this embodiment, in order to perform scrambling by using the dedicated identifier of the UE, for example, the temporary identifier of the cell wireless network is used for scrambling, other UEs cannot decode the information after receiving the information, so that the reserved retransmission resources will not be occupied.

The method also includes:

When the retransmission mechanism of the UE is non-adaptive retransmission, the base station uses the physical hybrid automatic retransmission indication channel to indicate the reception failure or indicates the reception failure through the content of the sent fourth information.

First, the base station reserves an uplink resource for retransmission of the UE according to the non-adaptive retransmission protocol. After the UE receives the indication that the reception fails, it can determine the retransmission resources reserved by the base station according to the timing relationship in the adaptive retransmission protocol, so that the reserved retransmission resources are retransmitted in the third information. carried information content. The physical hybrid automatic repeat indication channel indication in this embodiment is also called PHICH. The PHICH can indicate whether the reception is successful by sending ACK and NACK. Of course, after receiving the third information, the fourth information will carry the information content of the third information in the fourth information and send it to the UE. If the UE receives the fourth information, it finds that the fourth information does not contain If the content of the fourth information sent to the base station is not included, it is considered that the current transmission fails and retransmission is required. Obviously, in this embodiment, the fourth information is used to inform the terminal whether the reception of the third information is successful.

As a further improvement of this embodiment,

The method also includes:

The base station determines that there is UE information that sends UE information that carries the first information of the first random access sequence within a first time;

The base station notifies the UE group corresponding to the first random sequence of the information of the UEs having the random access requirement, wherein the UE information is used for the UE to determine the random access sequence in combination with the priority.

For example, the current group of UEs includes 10 UEs, and 3 UEs have random access requirements at the same time. Among them, these 3 UEs have certain priorities. Obviously, the UEs with higher priorities are required first. However, How to determine the random access sequence of the remaining two UEs may be determined according to the information of the UEs with random access requirements recorded in this embodiment. For example, the three UEs are UE1, UE2 and UE3 respectively, and the priorities are 1, 3 and 5 respectively. After UE3 receives the UE information that needs random access, it can consider that it currently has the lowest priority among the three UEs that need random access, and can use the third uplink resource sent by the base station based on the current first information. perform random access.

In this embodiment, the base station may determine the UE information requiring random access according to the received signal strength of the first information, or may directly extract the UE identifier from each first information to determine the UE information. Another simpler implementation is provided in this embodiment:

The base station determines that there is UE information that sends UE information carrying the first information of the first random access sequence within a first time, including:

The base station receives the demand identifier sent by the UE with random access demand on the predetermined resource;

The base station determines, according to the received demand identifier, that there is UE information that sends the first information carrying the first random access sequence within the first time.

The base station allocates a predetermined resource to each UE. If the UE has a random access requirement at a certain moment and will send a random access request, it will send a requirement identifier on the predetermined resource, and the requirement identifier can correspond to one or more Bit bit, usually in order to save communication resources, only one bit can be sent. If the base station receives the bit, it can determine how many UEs there are in the same group of UEs within a specified period of time according to whether the bit or the content of the bit is received. There is a need to send random access.

It is worth noting that: in the specific implementation process, the base station performing the above method will also estimate the number of UEs performing random access using the same random access sequence in the first time according to the received signal strength, or according to the received signal strength. The demand identifier determines the number of UEs requesting random access by using the same random access sequence within the first time, so that when responding to the first information, how many uplink transmission resources need to be allocated for requesting random access by using the same random access sequence The accessing UE performs random access.

Embodiment three:

As shown in FIG. 4, this embodiment provides a random access method,

Step S310: The first user equipment UE sends first information requesting random access by using a first random access sequence; wherein, the first random access sequence is shared by all UEs in the first UE group where the first UE belongs the random access sequence;

Step S320: the first UE receives the second information sent by the base station based on the first information;

Step S330: the first UE determines whether there are multiple UEs requesting random access by using the first random access sequence according to the second information;

Step S340: When multiple UEs request random access by using the first random access sequence, the first UE waits for random access according to the priority of the first UE.

The random access method described in this embodiment may be a random access method applied to the first UE. In this embodiment, the first UE may be any UE, and is not referred to in general.

The first UE group includes at least two UEs, where the at least two UEs will share the first random access sequence. The first UE is any UE in the first UE group. Therefore, in this embodiment, the first UE will use the first random access sequence of the first UE group to request random access. When requesting random access, the first information sent by the first UE is the first information. The first information carries the first random access sequence.

In step S320, the first UE will receive the second information sent by the base station, where the second information includes resource information of at least one uplink resource; and may also include a special field, through which the UEs in the first UE group can It is known whether there are multiple UEs sending the first information together, resulting in random collision. In this way, in step S330, it can be directly determined according to the second information whether multiple UEs use the first random access sequence to simultaneously request random access within the first time. In step S340, if it is found that there are multiple UEs performing random access at the same time, the random access will be waited according to the priority. The waiting for random access in this embodiment may include waiting for the base station to allocate uplink resources.

As a further improvement of this embodiment, the method further includes:

receiving, by the first UE, the fourth information sent by the base station;

If the fourth information carries the uplink data preset to be sent by the first UE, the first UE stops waiting for random access, and ends the current random access.

In this embodiment, the fourth information will be received. The fourth information carries the uplink data that the base station has received preset by the first UE. The first UE stops waiting for random access and ends the random access. Obviously, this can be done. Avoid repeated transmission by different UEs and redundant reception by the base station.

Further, the method further includes: receiving, by the first UE, UE information sent by a base station for requesting random access by using the first random access sequence within a first time; and the first UE according to the UE information and the priority of the first UE to determine the random access sequence. In this embodiment, the first time may be a predetermined time length, which may be the minimum time slice of a random access cycle. In this embodiment, the UE information may include the identification information of the UE, for example, the device number or device name of the UE, and may also include the priority of the UE requesting random access by using the first random access sequence within the first time, etc. information. The first UE will determine its own random access sequence according to its own priority and the priorities of other UEs within the first time. For example, if there are M UEs requesting random access within the first time, the priority of the first UE is ranked as the mth among the M priorities; then the first UE can determine, according to the above UE information, that the Data is sent in the uplink resources allocated by the mth base station, thereby completing random access and realizing data transmission.

Further, the method also includes:

The first UE sends a demand identifier for requesting random access on a predetermined resource, where the demand identifier is used by the base station to determine that there is a request for random access by using the first random access requirement within the first time. UE information.

In this embodiment, the base station sets a predetermined resource for the UE for sending the demand identifier, which facilitates the base station to easily know the information of the UE that has sent the random access request in the first time, and facilitates the processing of subsequent priority sorting.

In addition, the waiting for random access according to the priority of the first UE includes:

The first UE detects the fourth information sent by the base station; wherein the fourth information at least includes resource information of one uplink resource;

The first UE calculates the number of uplink resources allocated in the received fourth information, and determines, according to the priority of the first UE, whether the uplink resources allocated in the fourth information are for the first UE to send uplink data upstream resources.

The resource information of at least one uplink resource included in the fourth information, if according to the priority, when the first UE determines that it is currently its turn to send random access data, it can use the resource information allocated by the base station according to the resource information in the fourth information. Uplink resources for uplink access.

Embodiment 4:

As shown in FIG. 4 , this embodiment provides a random access configuration device, including:

a dividing unit 110, configured to divide user equipment UE groups; each UE group includes at least two UEs;

a first assigning unit 120, configured to assign a random access sequence to each of the UE groups;

a first setting unit 130, configured to set a priority of random access for the UEs in each UE group;

The second setting unit 140 is configured to set a preset specific threshold, where the preset specific threshold is used to determine whether to notify the UE of a random access request carrying the random access sequence received by the base station according to the preset specific threshold. Random access is requested with the above priority.

The random access configuration apparatus in this embodiment may be various network devices such as a base station or a mobility management entity, and the base station provided in this embodiment may be various types of base stations capable of wireless access, such as a cellular base station. In this embodiment, the dividing unit 110 , the first allocating unit 120 , the first setting unit 130 and the second setting unit 140 may all correspond to processors or processing circuits in the base station. The processor may include a central processing unit, a microprocessor, a digital signal processor, a programmable array, or an application processor, among others. The processing circuit may comprise an application specific integrated circuit.

The processor or the processing circuit can realize the functions of the above-mentioned functional units through the execution of the specified code. Any two of the above units may be integrated to correspond to the same processor or processing circuit, or may correspond to different processors or processing circuits respectively. When two or more units are integrated and correspond to the same processor or processing circuit, the functions of each unit can be accomplished by means of time division multiplexing or concurrent threads.

The above-mentioned base station can enable at least two UEs to share a random access sequence for random access through the division of UE groups, the allocation of random access sequences, the setting of priorities, and the setting of preset specific thresholds, and through the priority and the preset By setting the restriction of a specific threshold, when multiple UEs use the same random access sequence for access, the UE can be notified to access according to the priority, which can reduce random access conflicts.

The dividing unit 110 is specifically configured to divide the UE group according to the service type and/or geographical location of the UE. In this embodiment, when the UE group is divided, it may be based on at least one of the service type and geographic location of the UE. For details, please refer to the corresponding part of Embodiment 1, which will not be repeated here.

Further, the first setting unit 130 is specifically configured to determine the priority according to the service delay tolerance characteristic and/or subscription information of the UE. In this embodiment, when setting the priority, it is determined according to at least one of the service test tolerance characteristic and subscription information. In conclusion, the general principle is that the priority of the larger delay tolerant characteristic is lower than the priority of the smaller delay tolerant characteristic.

Further, the random access configuration apparatus further includes a sending unit; the sending unit is configured to send the grouping information, priority and random access sequence of the UE group by using the physical downlink control channel or the radio resource control information.

The sending unit in this embodiment may correspond to the wireless interface of the base station, and can send information such as grouping information, priority, and random access sequence to the UE, so as to facilitate the terminal to perform random access according to the grouping information and the like. In this embodiment, the sending unit specifically uses the physical downlink control channel or radio resource control information to send the grouping information, priority and random access sequence, which has the characteristics of easy implementation and high compatibility with the prior art. During specific implementation, the first allocating unit 120 in the base station may be further configured to allocate a predetermined resource to each UE, and the sending unit may be further configured to send resource information of the predetermined resource to the UE. The predetermined resource can be used by the UE to send the demand identifier, so that the base station can determine the UE information requesting random access by using the same random access sequence within the first time after receiving the demand identifier. The UE information here may include information such as UE identification and priority.

In a word, the base station provided in this embodiment can reduce random access conflicts and expand the random access capacity.

Embodiment 5:

As shown in FIG. 5 , this embodiment provides yet another base station, including:

a first receiving unit 210, configured to receive the first information carrying the first random access sequence;

a judgment unit 220, configured to judge whether the received signal strength of the first information is greater than a preset specific threshold;

A first sending unit 210, configured to send second information to the UE when the received signal strength is greater than the preset specific threshold; wherein the second information is used to notify the UEs in the first UE group Random access is requested by priority.

The base station in this embodiment may be the same physical base station as the base station provided in the previous embodiment. In this embodiment, both the first receiving unit 210 and the first sending unit 210 may correspond to an air interface of the base station, and the air interface can perform information exchange with the UE. In this embodiment, the first receiving unit can at least receive the first information that carries the first random access sequence. The first sending unit 210 can send the second information. The second information can inform the user that there are currently multiple UEs using the first random access sequence to request access at the same time, and instruct the UEs to wait for random access resources according to priorities and upload data.

The judging unit 220 may correspond to a processor or a processing unit in the base station. For the hardware description of the processor and the processing unit, reference may be made to the previous embodiment, which will not be repeated here.

Further, the first receiving unit 210 is further configured to receive third information sent by the UEs in the first UE group based on the second information; the first sending unit 210 is further configured to send based on the second information The third information sends fourth information, wherein the uplink resource information is resource information allocated to other UEs in the first UE group for uplink transmission except the UE that sends the third information. It is worth noting that the recipients of the fourth information in this embodiment may be all UEs within the coverage of the base station, or may be UEs in the first UE group, or may be only the ones that have sent the first information UE; the UE that specifically receives the fourth information may be determined by the manner in which the base station sends the fourth information.

In this embodiment, the first receiving unit 210 further receives third information sent by the first UE based on the second information. Usually, the third information carries uplink data that the first UE needs to send to the base station.

The first sending unit 210 will also send fourth information. The fourth information firstly carries at least one resource information of uplink resources allocated to the UE that uses the first random access sequence to send the first information. In this way, a UE that uses the first random access sequence to send the first information and has not yet obtained resource allocation for data transmission can, after receiving the fourth information, perform uplink according to the uplink resource information carried in the fourth information. transmission.

Further, the fourth information also carries the first uplink data received from the third information, which is used to inform the UE that the base station has successfully received the first uplink data, so as to avoid redundant transmission. The information content of the accepted third information is carried by the fourth information, so that the UE can be informed of the content that the current base station has received, so that the UE can know whether the information that it wants to send has been sent. Continue sending and avoid redundant sending and receiving.

Further, the base station further includes: a second allocation unit, further configured to reserve retransmission resources for the UE that sends the third information when the base station fails to receive the third information successfully.

The second allocating unit in this embodiment may be used to allocate retransmission resources to facilitate retransmission of data that has not been successfully transmitted. The specific structure of the second distribution unit in this embodiment may also include a processor or a processing circuit.

According to different retransmission mechanisms adopted by the UE, the manner in which the first sending unit 210 instructs retransmission in this embodiment is different. For example, the first sending unit 210 is further configured to send an uplink grant indication to the UE to indicate the retransmission resource when the retransmission mechanism of the UE is adaptive retransmission. For another example, the first sending unit 210 is further configured to, when the retransmission mechanism of the UE is non-adaptive retransmission, use a physical hybrid automatic retransmission indication channel to indicate a failure to receive or to pass the transmission of the fourth information sent. Carry content to indicate reception failure.

The base station also includes:

a first determining unit, configured to determine that there is UE information that sends the first information carrying the first random sequence within a first time;

The first sending unit 210 is further configured to notify the UE group corresponding to the first random sequence of the UE information that needs random access, wherein the UE information is used for the UE to determine random access based on the priority. access order.

The specific structure of the first determining unit in this embodiment may include a processor or a processing circuit or the like. It can be determined that there is UE information that uses the first random access sequence to perform random access to send the first information within the first time. The UE information here includes the UE identifier, the priority of the UE, the number of the UE, and the like.

In a word, after the base station obtains the UE information, it can send the UE information to the UE that needs random access, so that the UE can determine the access sequence according to the UE information and its own priority.

Further, the first determining unit is specifically configured to receive a demand identifier sent by a UE that has a random access requirement on a predetermined resource; according to the received demand identifier, determine that there is a transmission carrying the first identifier within the first time. UE information of the first information of a random access sequence.

The first determining unit in this embodiment can determine the UE information according to the demand identifier sent on the UE sub-predetermined resource. For example, the first determining unit can determine the number of UEs requesting random access by using the same random access sequence in the first time according to the received demand identifier, so as to know how many uplink transmission resources need to be allocated, and at the same time Sending the UE information to the UE facilitates the UE to determine its own random access sequence according to its own priority and the priorities of other UEs.

Embodiment 6:

As shown in FIG. 6 , this embodiment provides a user equipment UE, where the UE is a first UE;

The second sending unit 310 is configured to use a first random access sequence to send first information for requesting random access; wherein the first random access sequence is shared by all UEs in the first UE group where the first UE belongs the random access sequence;

A second receiving unit 320, configured to receive the second information sent by the base station based on the first information;

a second determining unit 330, configured to determine, according to the second information, whether multiple UEs request random access by using the first random access sequence;

The processing unit 340 is configured to wait for random access according to the priority of the first UE when multiple UEs request random access by using the first random access sequence.

The UE described in this embodiment may be various types of terminal equipment, for example, an MTC terminal. Both the second sending unit 310 and the second receiving unit 320 may correspond to transceiver antennas in the UE, and can perform information interaction with the base station.

The specific structures of the second determining unit 330 and the processing unit 340 may both correspond to a processor or a processing circuit in the UE. For the structure of the processor or the processing circuit, reference may be made to the corresponding parts in the foregoing embodiments, which will not be repeated in this embodiment.

In short, the first UE in this embodiment will share a random access sequence with other UEs in the UE group to request random access. When two or more UEs use the same random access sequence to request random access at the same time If it is entered, it will receive a notification from the base station, wait for the uplink transmission resources allocated by the base station in order of priority, and complete random access and uplink data transmission.

The UE structure provided in this embodiment has the characteristics of less random access conflict when performing random access.

Further, the second receiving unit 320 is further configured to receive fourth information sent by the base station;

The processing unit 330 is configured to stop waiting for random access and end the current random access when the fourth information carries the uplink data preset to be sent by the first UE.

In this embodiment, if the fourth information received by the first UE carries the uplink data that the first UE wants to send, it is equivalent to the base station notifying the first UE that it has received the data to be sent by the first UE, and it is unnecessary to Send again to avoid redundant sending and redundant receiving, occupying communication resources and processing resources.

Further, the second receiving unit 320 is further configured to receive UE information sent by the base station for requesting random access by using the first random access sequence within a first time; the processing unit 340 is specifically configured to The UE information and priority determine the random access sequence.

In this embodiment, by receiving the UE information, the second receiving unit 220 facilitates the processing unit 340 in the first UE to determine the sequence of this random access according to the first UE's own priority and the priorities of other UEs .

In addition, the second sending unit 310 is further configured to send a demand identifier for requesting random access on a predetermined resource, where the demand identifier is used by the base station to determine that the first random access is available within the first time. The incoming request requests the UE information of the random access requirement. In this embodiment, the second sending unit 310 will use the first random access sequence to send the first information, and will also send the demand identifier on the predetermined resource, which is convenient for the base station to obtain the first information within the first time. The first random access sequence sends the UE information of the random access request. The UE information here may include the number of UEs and the identity of the UEs.

Further, the processing unit 340 is further configured to detect fourth information sent by the base station; wherein, the fourth information includes at least one uplink resource resource information; for the uplink resources allocated in the received fourth information The number is calculated, and according to the priority of the first UE, it is determined whether the uplink resources allocated in the fourth information are uplink resources for the first UE to send uplink data. In this embodiment, the processing unit 340 will determine its own random access sequence according to the UE information and its own priority, that is, determine which uplink resource allocated in the fourth information is for itself to complete the random access. access.

In a word, when the UE described in this embodiment performs random access, the random access conflict is small and the like.

Below in conjunction with the above-mentioned embodiments, several specific examples are provided:

Example one:

The base station groups the UEs, and configures a separate Group RadioNetwork Temporary Identity G-RNTI and a random access sequence for each group of UEs, and configures a priority for sending uplink data for each UE in the group. The division of the UE group may consider both the geographic location of the UE and the service type of the UE. One UE may support multiple services, so the same UE may belong to multiple groups at the same time. When random access from a certain service type needs to be initiated, the group of UEs can only initiate random access using the random access sequence corresponding to the service. The configuration of the priority of the UE may be based on the delay tolerance characteristic and subscription situation of the UE. The sending priority of the UE may be indicated by the PDCCH or by the RRC. When random access of a certain service needs to be initiated, the group of UEs needs to initiate random access with a random access sequence corresponding to the service.

The base station detects that the received signal strength of the same random access sequence exceeds a preset specific threshold at the same time or within a period of time, and temporarily changes the cell wireless network of the random access response protocol data unit RAR PDU (Random Access Response Protocol Data Unit). The identification (Temporary Cell-RNTI) field is set as a special field to inform this group of UEs to send signaling or data in sequence according to the pre-configured UE sending priority order.

The specific threshold is a preconfigured value.

The cell radio network temporary identification field is set as a special field, which may be, the cell radio network temporary identification field is set to all 0 or 1, or is set to a random access radio network temporary identifier (Random Access RadioNetwork Temporary Identifier, RA RNTI) Wait.

FIG. 7 is a schematic diagram of a RAR PDU provided in this embodiment.

The received signal strength detected within a period of time here refers to the superposition of signal strengths at multiple times. For example, if the same random access sequence is detected on the 1st, 3rd, and 5th subframes of a 10ms radio frame, and the signal strengths of the random access sequence in these three subframes are a, b, and c, respectively, then 10ms The signal strength of the random access sequence detected within a period of time (within a period of time) is a+b+c.

According to the pre-configured transmission priority order, the group of UEs sequentially transmits Msg3a on the allocated uplink resources. The Msg3a here may correspond to the third information in the foregoing embodiment. Msg3a may be an RRC connection establishment request message, or may be a buffer status report (BSR, Buffer Status Report) and/or uplink data.

The UE with the highest transmission priority must carry the G-RNTI in Msg3a. After receiving the G-RNTI, the base station may determine the number of UEs included in the UE group according to the corresponding relationship between the G-RNTI and the number of UEs in the UE group.

Msg3a may also carry the unique identifier of the current UE: C-RNTI or a unique UE identifier from the core network, such as S-TMSI (SAE Temporary Mobile Subscriber Identity, SAE Temporary Mobile Subscriber Identity) or a random number.

When a certain UE has no data to send, it may not send any data.

After receiving Msg3a, the base station sends Msg4a. Msg4a is scrambled by G-RNTI. The Msg4a in this embodiment may be equivalent to the fourth information in the foregoing embodiments. Msg4a shall at least include the uplink transmission resources of the next UE.

Based on its own priority, the UE determines whether it is its turn to send signaling or data. If yes, receive Msg4a sent by the base station. It is also possible to allocate a temporary cell radio network temporary identifier TC-RNTI/C-RNTI to the UE through Msg4a. At this time, the current UE needs to monitor Msg4a.

Example two:

This example combines the content of Example 1 and includes the following steps:

The current UE sends uplink data in Msg3a.

The Msg4a issued by the base station should include not only the UL Grant of the next UE, but also the data sent by the current UE, that is, a copy of the data in Msg3a, to inform other UEs in the same group that the base station already knows the message, and the same message may not be necessary. send. In this way, repeated sending and receiving of redundant messages is avoided, unnecessary signaling overhead is reduced, and terminal implementation complexity is reduced.

During the execution of the enhanced random access method, if a UE finds that the data it wants to send has become redundant by receiving Msg4a (that is, other UEs have already informed the base station), it will no longer monitor Msg4a, that is, directly end the current random access. access process. If the UE finds that the type of data it wants to send does not belong to the service currently being accessed, it initiates random access to the base station again on other resources.

Example three:

In this example, combining the content in Example 1 and Example 2, consider the problem that retransmission is required when the base station fails to receive the information sent by the UE.

When the base station finds that the current UE does not send uplink data on Msg3a, it reserves retransmission resources for the UE. The timing relationship of the retransmission time can be consistent with the existing protocol. The maximum number of Msg3a retransmissions may be different from the maximum number of Msg3 retransmissions maxHARQ-Msg3Tx defined in the existing protocol.

The retransmission of Msg3a can be non-adaptive retransmission or adaptive retransmission.

For the case of non-adaptive retransmission:

The base station reserves retransmission resources for the UE, and according to the timing relationship, the UE can also infer the location of the retransmission resources.

If Msg4a copies the data in Msg3a at the same time, the UE can know whether the base station has successfully received the Msg3a sent by itself by reading Msg4a, so no PHICH indication is required. If the UE does not read the Msg3a data sent by itself in Msg4a, it initiates non-adaptive retransmission.

If Msg4a does not contain the data of Msg3a, the base station needs to tell the UE whether the transmission is successful through the PHICH. If the UE receives the PHICH and indicates a NACK, a non-adaptive retransmission is initiated.

For the case of adaptive retransmission:

The base station may allocate a new UL Grant to the UE, and the UL Grant is indicated by the PDCCH. Unlike the UL Grant assigned to the next UE (scrambled with G-RNTI), the retransmitted UL Grant is scrambled with the UE's dedicated identity, such as C-RNTI.

Example four:

Combined with the random access method provided in the above example, the method provided in this example further includes:

The UE sending the random access sequence will inform the base station of its own access requirements, that is, it wishes to access. For example, by using the predetermined resources in the foregoing embodiments, a requirement identifier is sent to inform the base station of its own access requirement.

After receiving the access requirements of all UEs in the UE group, the base station will inform which UEs in the UE group will initiate the access process, so that the UEs with access requirements can be easily accessed according to their own priorities and other access requirements. The required UE determines the random access sequence of its own random access this time.

A possible implementation is:

In Msg2a, the base station allocates an uplink resource to the group of UEs, and the group of UEs sends access requirements on this uplink resource. For example, each UE uses one PRB to report its own demand, and UEs with higher priorities use resources in lower frequency bands. As shown in FIG. 8 , UE 1 to UE 13 are a group, UE 1 has a higher transmission priority, and UE 13 has the lowest priority. UE 2, UE 4, UE 5, UE 10, and UE 13 have access requirements, so they send their own access requirements on the resources allocated by the base station, such as sending 1 byte and all 1 bit on their own PRB. Other UEs have no access requirements and will not respond.

After receiving the access requirements of all the UEs in the group, the base station will notify in step 4 which UEs of all the UEs in the group will send uplink data. For example, in the way of bitmap, 1 means "access", and 0 means "no access". Therefore, the message received by the group of UEs in step 4 is "0101100001001".

According to the demand for uplink access of the same group of UEs fed back by the base station "0101100001001", the UE determines the random access sequence of this random access according to the priority of the nearest itself and the priority of other UEs with transmission needs. The transmission priorities of UE2, UE4, UE5, UE10, and UE13 are 1, 2, 3, 4, and 5 in sequence. When receiving the first uplink grant indication, UE 2 with priority 1 uses this resource to send Msg3a; upon receiving the second uplink grant indication, UE 4 with priority 2 uses this resource to send Msg3a.

Example five:

Each UE maintains a priority counter, and the counter is decremented by 1 each time the UE receives the uplink grant instruction. When the counter is 0, it means that the uplink grant instruction belongs to itself, and it can use the corresponding uplink resources. send data on. The uplink grant indication may be the information carried in the fourth information in the foregoing embodiment.

Assuming that the priorities of UE a, UE b, and UE c are 1, 3, and 2 in sequence, the priority counters of the three UEs may be 0, 2, and 1, respectively.

When UE a, UE b, and UE c receive the first uplink grant indication (that is, receive the uplink grant indication in Msg2a), UE a finds that its priority counter is 0, indicating that it should When sending, the uplink data or BSR is sent on the allocated uplink resources; at this time, UE b and UE c find that their counters are not 0, and decrement their own counters by 1 to become 1 and 0, respectively.

When UE b and UE c receive another uplink grant indication (that is, UL Grant in Msg4a), UE c finds that its priority counter is 0, indicating that it should send itself at this time, on the allocated uplink resources Send uplink data or BSR; at this time, UE b decrements its own counter to 0. This means that if UE b receives another uplink grant indication (also UL Grant in Msg4a), it will send its own uplink data or BSR.

Example six:

This example provides a random access method including:

The base station receives the first information sent with the first random access sequence;

judging whether the received signal strength of the first information is greater than a preset specific threshold;

If the received signal strength is greater than the preset specific threshold, determine the UE information currently requesting random access by using the first random access sequence; the UE information here may include the number of UEs; it may also include UE identifiers or these the priority of the UE;

The UE information is sent to the UE, and the UE is notified to perform random access according to the priority; specifically, the UE may be notified to perform random access according to the priority through the second information. The second information may further carry resource information of at least one uplink transmission resource.

After receiving the uplink transmission resources allocated by the UE, the fourth information is sent; the fourth information carries resource information with at least one uplink transmission resource, and the uplink transmission resources corresponding to the resource information carried in the fourth information are used for other The UE performs random access to complete uplink transmission; the steps are repeated until the uplink transmission resources obtained by all UEs requesting random access by using the first random access sequence of prime numbers within the first time are used to complete the data transmission.

For example, the number of UEs that use the same random access sequence to send the first information at the same time is 5; after the base station sends the second information, it will repeat the transmission of the fourth information 4 times, so that each user After the UEs of the first information sent by the same random access sequence can send a piece of first information, the random access is completed. In this embodiment, the first information may be random access information.

After receiving the second information, the UE determines its own random access sequence according to the UE information and the UE's own priority, monitors the fourth information, and uses the resource information carried in the fourth information to determine that the base station is allocated to itself. the uplink transmission resource, and send data on the uplink transmission resource. For example, UE A, according to the second information, determines that there are 5 UEs that need random access in the current period, and its own priority is that the priority order of the 5 UEs is the fourth, then the random access order of UE A is the base station response The 4th uplink transmission resource among the 5 uplink transmission resources allocated by a message. UE A, after receiving the second information, will continue to monitor the fourth information until the resource information of the fourth uplink transmission resource allocated by the base station is monitored in the fourth information.

Example seven:

As shown in Figure 9, this example provides a random access method, including:

Step 1: The first UE sends Msg1; Msg1 carries a random access sequence. The second UE also sends Msg1; the first UE and the second UE belong to different UEs of the same UE group, and the priority of the second UE is higher than that of the first UE. And in this embodiment, the second UE refers to multiple UEs other than the first UE.

Step 2: The base station sends Msg2a; in Msg2a, the base station uses the RAR response information scrambled by G-RNT1 to instruct the UEs of the UE group to access in sequence according to priority. Of course, step 2 is performed after the base station determines that the received signal strength exceeds a preset specific threshold. The Msg2a here is equivalent to the second information in the foregoing embodiment.

Step 3: The second UE sends Msg3a, where the Msg3a may include an RRC connection establishment request of the second UE, or BSR and/or uplink data. The Msg3a here is equivalent to the third information in the foregoing embodiment. At the same time, the first UE with a lower priority also infers that it is its turn to send.

Step 4: The UE receives the Msg4a sent by the base station;

Step 3': The second UE sends Msg3a, which may include an RRC connection establishment request of another second UE, or BSR and/or uplink data.

Step 4': UE receives the Msg4a sent by the base station;

Step 5: The first UE sends Msg3a, where the Msg3a includes an RRC connection establishment request of the first UE, or BSR and/or uplink data.

After receiving the Msg3a sent by a UE, the base station will send a Msg4a until the random access and data transmission are completed by using the UE that requests random access through a random access sequence.

Example eight:

As shown in FIG. 10 , this example provides a random access method, which is applied to a UE, and specifically includes:

Step 21: Send the Msg1 carrying the random access sequence;

Step 22: After receiving Msg2a, the evolved base station eNB instructs the UEs of the UE group to send uplink data in sequence according to the priority.

Step 23: Determine whether it is your turn to send the uplink data, if so, go to Step 24, if not, return to Step 23.

Step 24: Send Msg3a, which may include at least one of RRC connection establishment request message, BSR and other uplink data.

Example nine:

As shown in Figure 11, this example provides a random access method applied to the UE side, including:

Step 41: Send Msg1;

Step 42: Receive Msg2a; the information content and functions of Msg1 and Msg2a in this example may refer to the foregoing examples or embodiments.

Step 43 : Determine whether there is similar data to be sent, if yes, go to Step 44 , if not, go to Step 44 .

Step 44: Determine whether it is your turn to send, if it goes to Step 47, if not, return to Step 43.

Step 45: Determine whether there is other data to be sent, if yes, go to Step 47, if not, end.

Step 46: normal random access;

Step 47: Receive the Msg4a sent by the base station.

Step 48: Send data Msg3a.

Example ten:

As shown in Figure 12, this example provides a random access method. The second UE and the first UE in FIG. 12 are UEs of the same UE group, and the second UE here refers to multiple UEs with higher priorities than the first UE.

Methods provided by this example include:

Step 31: Send Msg1;

Step 32: Receive Msg2a;

Step 33: Inform the base station whether it has an access requirement, for example, informing the base station by sending the requirement identifier provided in the embodiment.

Step 34: The base station delivers the information of UEs with access requirements to all UEs in the UE group.

Step 35: The UE determines its own sending order. The specific determination method can be based on the priority of its own UE and other UEs with access requirements, and the priority can be sorted, and the sending order can be determined according to the sorting result. The sequence may be the aforementioned random access sequence.

Step 36: Send Msg3a.

Step 37: Receive Msg4a, all UEs with access requirements will receive the Msg4a.

Step 36': Send Msg3a.

Step 37': receive Msg4a.

Step 38: The first UE sends Msg3a in its own sending sequence.

Example eleven:

As shown in Figure 13, this example provides a random access method, which is applied to a UE, including:

Step 51: Send Msg1;

Step 52: Receive Msg2a;

Step 53: Determine whether the count of the counter is 0? If yes, go to step 55, if no, go to step 54; in this example, the initial value of the count of the counter is the current UE random access sequence set determined according to the UE information. For example, the current UE determines the fourth one to send uplink data, and the initial value is 4.

Step 54: The count of the counter is decremented by one.

Step 55: Receive the Msg4a delivered by the base station.

Step 56: Send Msg3a.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined, or Can be integrated into another system, or some features can be ignored, or not implemented. In addition, the coupling, or direct coupling, or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be electrical, mechanical or other forms. of.

The unit described above as a separate component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, it may be located in one place or distributed to multiple network units; Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present invention may all be integrated into one processing module, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; the above-mentioned integration The unit can be implemented either in the form of hardware or in the form of hardware plus software functional units.

Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments can be completed by program instructions related to hardware, the aforementioned program can be stored in a computer-readable storage medium, and when the program is executed, execute Including the steps of the above-mentioned method embodiment; and the aforementioned storage medium includes: a mobile storage device, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk and other various A medium on which program code can be stored.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (32)

1. A random access configuration method, comprising: Divide user equipment UE groups; each UE group includes at least two UEs; assigning a random access sequence to each of the UE groups; Set the priority of random access for the UEs in each UE group; A preset specific threshold is set, wherein the preset specific threshold is used to notify the UEs in the corresponding UE group to follow when the received signal strength of the random access sequence received by the base station is greater than the preset specific threshold. The priority requests random access. 2. The method according to claim 1, wherein The dividing user equipment UE group includes: The UE groups are divided according to service types and/or geographic locations of the UEs. 3. The method according to claim 1 or 2, characterized in that, The setting of the random access priority for the UEs in each UE group includes: The priority is determined according to the service delay tolerance characteristic and/or subscription information of the UE. 4. A random access method, comprising: The base station receives the first information that is sent by the UE and carries the first random access sequence; The base station determines, according to the received first information, whether the received signal strength of the random access sequence is greater than a preset specific threshold; When the received signal strength is greater than the preset specific threshold, the base station sends second information to the UE; wherein the second information is used to notify the UEs in the first UE group that send the first information Random access is requested by priority. 5. The method according to claim 4, characterized in that, The method also includes: receiving, by the base station, third information sent by a UE in the first UE group based on the second information; The base station sends fourth information based on the third information, wherein the fourth information carries at least one piece of uplink resource information; the uplink resource information is allocated to the first UE group except for sending the third information Resource information for uplink transmission performed by other UEs other than the UE. 6. The method of claim 5, wherein The fourth information also carries the first uplink data received from the third information, which is used to inform the UE that the base station has successfully received the first uplink data, so as to avoid redundant transmission. 7. The method according to claim 5 or 6, characterized in that, The method also includes: When the base station fails to receive the third information, the base station reserves retransmission resources for the UE that sends the third information. 8. The method of claim 7, wherein The method also includes: When the retransmission mechanism of the UE is adaptive retransmission, the base station sends an uplink grant indication to the UE to indicate the retransmission resource. 9. The method of claim 7, wherein The method also includes: When the retransmission mechanism of the UE is non-adaptive retransmission, the base station uses a physical hybrid automatic retransmission indication channel to indicate reception failure or indicates reception failure through the content of the sent fourth information. 10. The method of claim 4, wherein: The method also includes: The base station determines that there is UE information that sends the first information carrying the first random access sequence within a first time; The base station notifies the UE group corresponding to the first random sequence of UE information requiring random access, wherein the UE information is used by the UE to determine the random access sequence in combination with the priority. 11. The method of claim 10, wherein: The base station determines that there is UE information that sends the first information carrying the first random access sequence within a first time, including: receiving, by the base station, a demand identifier sent on a predetermined resource by a UE with a random access demand; The base station determines, according to the received demand identifier, that there is UE information that sends the first information carrying the first random access sequence within the first time. 12. A random access method, characterized in that, The first user equipment UE sends first information carrying a first random access sequence; wherein, the first random access sequence is a random access sequence shared by all UEs in the first UE group where the first UE belongs; The first UE receives the second information sent by the base station based on the first information; the second information is sent to the base station when the base station determines that the received signal strength of the first random access sequence is greater than a preset specific threshold. sent by the first UE; determining, by the first UE, whether there are multiple UEs requesting random access by using the first random access sequence according to the second information; When multiple UEs request random access by using the first random access sequence, the first UE waits for random access according to the priority of the first UE. 13. The method of claim 12, wherein The method also includes: receiving, by the first UE, the fourth information sent by the base station; If the fourth information carries the uplink data preset to be sent by the first UE, the first UE stops waiting for random access, and ends the current random access. 14. The method of claim 12, wherein The method also includes: receiving, by the first UE, UE information sent by the base station for requesting random access by using the first random access sequence within a first time; The first UE determines a random access sequence according to the UE information and the priority of the first UE. 15. The method of claim 14, wherein: The method also includes: The first UE sends a demand identification requesting random access on a predetermined resource, where the demand identification is used by the base station to determine that there is a demand for random access by using the first random access sequence within the first time. UE information. 16. The method of claim 14, wherein The first UE waits for random access according to the priority of the first UE, including: The first UE detects the fourth information sent by the base station; wherein the fourth information at least includes resource information of one uplink resource; The first UE calculates the number of uplink resources allocated in the received fourth information, and determines, according to the priority of the first UE, whether the uplink resources allocated in the fourth information are for the first UE to send Uplink resources for uplink data. 17. A random access configuration device, comprising: a dividing unit for dividing user equipment UE groups; each UE group includes at least two UEs; a first allocation unit, configured to allocate a random access sequence to each of the UE groups; a first setting unit, configured to set the priority of random access for the UEs in each UE group; The second setting unit is configured to set a preset specific threshold, wherein the preset specific threshold is used to notify the corresponding The UEs in the UE group request random access according to the priority. 18. The apparatus of claim 17, wherein The dividing unit is specifically configured to divide the UE group according to the service type and/or geographical location of the UE. 19. The device according to claim 17 or 18, characterized in that, The first setting unit is specifically configured to determine the priority according to the service delay tolerance characteristic and/or subscription information of the UE. 20. A base station, comprising: a first receiving unit, configured to receive the first information that is sent by the UE and that carries the first random access sequence; a judging unit, used for the base station to judge whether the received signal strength of the random access sequence is greater than a preset specific threshold according to the received first information; a first sending unit, configured to send the second information to the UE when the received signal strength is greater than the preset specific threshold; wherein the second information is used to notify the UEs in the first UE group to request according to the priority random access. 21. The base station according to claim 20, wherein, The first receiving unit is further configured to receive third information sent by UEs in the first UE group based on the second information; The first sending unit is further configured to send fourth information based on the third information, wherein the fourth information carries at least one uplink resource information; the uplink resource information is allocated to the first UE Resource information for uplink transmission performed by other UEs in the group except the UE that sends the third information. 22. The base station according to claim 21, wherein, The fourth information also carries the first uplink data received from the third information, and is used to inform the UE that the base station has successfully received the first uplink data, so as to avoid redundant transmission. 23. The base station according to claim 21 or 22, wherein, The base station also includes: The second allocating unit is further configured to reserve retransmission resources for the UE that sends the third information when the base station fails to receive the third information. 24. The base station according to claim 23, wherein, The first sending unit is further configured to send an uplink grant indication to the UE to indicate the retransmission resource when the retransmission mechanism of the UE is adaptive retransmission. 25. The base station according to claim 23, wherein, The first sending unit is further configured to use a physical hybrid automatic retransmission indication channel to indicate reception failure when the retransmission mechanism of the UE is non-adaptive retransmission or to indicate through the content of the sent fourth information. Reception failed. 26. The base station of claim 20, wherein, The base station also includes: a first determining unit, configured to determine that there is UE information that sends the first information carrying the first random access sequence within a first time; The first sending unit is further configured to notify the UE group corresponding to the first random sequence of UE information that needs random access, wherein the UE information is used for the UE to determine the random access sequence in combination with the priority . 27. The base station of claim 26, wherein, The first determining unit is specifically configured to receive a demand identifier sent by a UE that has a random access requirement on a predetermined resource; according to the received demand identifier, determine that there is a transmission carrying the first random access identifier within the first time. UE information of the first information of the incoming sequence. 28. A user equipment UE, wherein the UE is a first UE; a second sending unit, configured to send first information carrying a first random access sequence; wherein the first random access sequence is a random access shared by all UEs in the first UE group where the first UE belongs sequence; The second receiving unit is configured to receive second information sent by the base station based on the first information; the second information is sent to the base station when the base station determines that the received signal strength of the first random access sequence is greater than a preset specific threshold sent by the first UE; a second determining unit, configured to determine, according to the second information, whether multiple UEs use the first random access sequence to request random access; The processing unit is configured to wait for random access according to the priority of the first UE when multiple UEs request random access by using the first random access sequence. 29. The UE of claim 28, wherein The second receiving unit is further configured to receive fourth information sent by the base station; The processing unit is configured to stop waiting for random access and end the current random access if the fourth information carries the uplink data preset to be sent by the first UE. 30. The UE of claim 28, wherein The second receiving unit is further configured to receive UE information sent by the base station for requesting random access by using the first random access sequence within a first time; The processing unit is specifically configured to determine a random access sequence according to the UE information and the priority of the first UE. 31. The UE of claim 30, wherein The second sending unit is further configured to send a demand identification requesting random access on a predetermined resource, wherein the demand identification is used by the base station to determine that the first random access sequence request is available within the first time UE information for random access requirements. 32. The UE of claim 30, wherein The processing unit is further configured to detect fourth information sent by the base station; wherein, the fourth information includes resource information of at least one uplink resource; calculate the number of uplink resources allocated in the received fourth information, And according to the priority of the first UE, it is determined whether the uplink resources allocated in the fourth information are uplink resources for the first UE to send uplink data.

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