WO2016188454A1

WO2016188454A1 - C-rnti management method and access network node for ue

Info

Publication number: WO2016188454A1
Application number: PCT/CN2016/083532
Authority: WO
Inventors: 刘星
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-10-22
Filing date: 2016-05-26
Publication date: 2016-12-01
Also published as: CN106612551A

Abstract

A C-RNTI management method for a UE comprises: selecting, by an access network control node, multiple C-RNTIs from unallocated C-RNTIs; and transmitting the selected C-RNTIs to a specified access network node. The method eliminates the need of repeatedly requesting a control node for C-RNTI allocation each time C-RNTIs are allocated to a UE, such that a base station can perform partially autonomous C-RNTI management, and reduce the delay of C-RNTI allocation.

Description

Method for managing C-RNTI of UE and access network node

Technical field

The present application relates to, but is not limited to, the field of wireless communications, and in particular, to a method for managing a C-RNTI of a UE in an ultra-dense network, and an access network node and an access network control node.

Background technique

Ultra Dense Network (UDN) is one of the most promising technical directions for improving 5G system capacity and user data rate. In an ultra-dense network, a low power node (LPN), such as a RRU (Remote Radio Unit)/RRH (Remote Radio Head), a Pico eNB (micro base station), Home eNB (Home Base Station), Relay Node (Relay Node), etc., are densely deployed, and their density is even greater than that of small cell enhancement technology in 4G. The distance between the low power nodes is reduced and can be monitored from each other. The distance between the low-power node and the user equipment (User Equipment, UE for short) also becomes very close, so that their transmission power can be greatly reduced.

Intensive deployment of low-power nodes on the other hand poses a serious mobility problem: frequent handovers between UEs at low power nodes cause data interruptions and data rate fluctuations. A dual connectivity solution is proposed in the 3rd Generation Partnership Project (3GPP) R12, that is, the UE can simultaneously connect to a macro base station (Macro eNodeB or eNB) and a low power node. The dual connectivity of R12 enhances the UE's mobility performance in densely deployed low-power node scenarios to a certain extent. However, the dual connectivity fails to completely address various aspects of the user experience that affect the user experience during the handover process, such as the target base station admission control delay, X2 interface data forwarding delay, and the like. Moreover, the dual connection cannot solve the scenario where there is no macro base station coverage or the UE has no dual connection capability.

The core idea of solving the ultra-dense network mobility problem through virtualization is that the UE or the one or more low-power nodes can form a virtual cell (Virtual Cell, VC for short) to serve the UE. The partial context of the UE, such as the cell radio network temporary identifier (C-RNTI), the bearer identifier, the security key, and the security algorithm of the UE, does not change before and after the handover, provides a consistent communication experience for the UE, and reduces the user plane. Delay.

The C-RNTI is a cell-level parameter. If the UE moves to another cell, the network side needs to reallocate a new C-RNTI. In the related art, a plurality of base stations (where the base station represents any access network node that can provide air interface access for the UE) can be connected to the same access network control node. When the allocation authority of the C-RNTI is placed on the access network control node to ensure that the UE moves within the range of the access network control node, the C-RNTI remains unchanged, that is, the C-RNTI becomes a parameter of the control node level.

However, retaining the allocation authority of the C-RNTI on the access network control node causes the allocation delay of the C-RNTI to become large. When the UE performs the random access, the UE does not receive the C-RNTI allocated for itself in the time window, which causes the UE to consider the random access failure. When the UE performs the handover of the access network node, the UE may encounter the radio link failure because the RRC (Radio Resource Control) connection reconfiguration message is not received for a long time.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The embodiments of the present invention provide a C-RNTI management method for a UE, an access network node, and an access network control node, to reduce the allocation delay of the C-RNTI.

An embodiment of the present invention provides a method for managing a cell radio network temporary identifier (C-RNTI) of a UE, which is applied to an access network control node that has a C-RNTI allocation authority, and includes:

The access network control node selects multiple C-RNTIs from unassigned C-RNTIs;

The selected C-RNTI is sent to the designated access network node.

Optionally, the foregoing management method further has the following features:

The access network control node sends the selected C-RNTI to the designated access network node when the initial interface is established with the designated access network node, or

The access network control node sends the selected C-RNTI to the designated access network node after receiving the request to allocate the C-RNTI message by the designated access network node.

Optionally, the foregoing management method further has the following features: the method further includes:

The access network control node determines parameter information for managing the C-RNTI;

Sending the parameter information to the designated access network node.

Optionally, the foregoing management method further has the following features:

The access network control node sends the parameter information to the designated access network node when initial interface establishment with the designated access network node; or

The access network control node sends the modified parameter information to the designated access network node after modifying the parameter information.

Optionally, the foregoing management method further has the following features:

The parameter information includes: a first preset threshold and a first preset time, and a second preset threshold and a second preset time, where the parameter information is used to indicate that the access network node is found to have idleness The number of C-RNTIs is less than the first preset threshold, and after the first preset time, requesting the access network control node to allocate a C-RNTI, indicating that the access network node is found to have The number of idle C-RNTIs is greater than the second preset threshold, and after the second preset time continues, the access network control node is requested to reclaim the C-RNTI.

After receiving the request of the designated access network node to reclaim the C-RNTI message, the access network control node recovers part of the C-RNTI.

And if the access network control node determines that the number of idle C-RNTIs that are owned is less than a third preset threshold and continues for a third preset time, sending a reclaimed partial C-RNTI message to the designated access network node.

Optionally, the foregoing management method further has the following features:

The reclaimed portion C-RNTI message carries information of the reclaim condition.

An embodiment of the present invention further provides an access network control node, including:

Setting a module, configured to select multiple C-RNTIs from unassigned C-RNTIs;

The sending module is configured to send the selected C-RNTI to the designated access network node.

Optionally, the foregoing access network control node further has the following feature: the sending module is configured to: when the initial interface is established with the designated access network node, send the selected C-RNTI to the The designated access network node is configured to send the selected C-RNTI to the designated access network node after receiving the request to allocate the C-RNTI message by the specified access network node.

Optionally, the foregoing access network control node further has the following features:

The setting module is further configured to determine parameter information for managing the C-RNTI, where the parameter information includes: a first preset threshold and a first preset time, and a second preset threshold and a second preset time, The parameter information is used to indicate that the access network node detects that the number of idle C-RNTIs owned by the access network node is less than the first preset threshold, and continues to the access after the first preset time The network control node requests to allocate a C-RNTI, and indicates that the access network node finds that the number of idle C-RNTIs owned by the access network node is greater than the second preset threshold, and after the second preset time, The access control node requests to reclaim the C-RNTI;

The sending module is further configured to send the parameter information to the designated access network node.

Optionally, the foregoing access network control node further has the following feature: the sending module is configured to: send the parameter information to the designated access network when initial interface establishment with the designated access network node And after the setting module modifies the parameter information, the modified parameter information is sent to the designated access network node.

Optionally, the foregoing access network control node further has the following feature: the access network control node further includes:

The recovery module is configured to recover a part of the C-RNTI after receiving the request of the designated access network node to reclaim the C-RNTI message.

The recovery module is configured to: if it is determined that the number of idle C-RNTIs that are owned is less than a third preset threshold and last for a third preset time, send a reclaimed partial C-RNTI message to the designated access network node, where And the reclaimed part of the C-RNTI message carries information of the revocation condition.

The embodiment of the present invention further provides a method for managing a cell radio network temporary identifier (C-RNTI) of a UE, which is applied to an access network node that provides air interface access for the UE, including:

Receiving a C-RNTI allocated by an access network control node;

An idle C-RNTI is selected from the C-RNTIs and allocated to the designated UE.

Optionally, the foregoing method further has the following features: the method further includes:

When the access network node allocates a C-RNTI to the UE, if it finds that there is no idle C-RNTI, it sends a request to the access network control node to allocate a C-RNTI message.

If the access network node determines that the number of idle C-RNTIs is less than the first preset threshold, and continues for the first preset time, sends a request to the access network control node to allocate a C-RNTI message; Determining that the number of idle C-RNTIs that are owned is greater than a second preset threshold, and after continuing for a second preset time, sending a request to the access network control node to reclaim the C-RNTI message.

Optionally, the foregoing method further has the following feature: the request to allocate a C-RNTI message carries a difference between the number of required C-RNTIs or the number of owned idle C-RNTIs and the first preset threshold.

Receiving a reclaimed partial C-RNTI message of the access network control node, where the reclaimed part C-RNTI message carries information of a revocation condition;

If it is determined that the owned C-RNTI satisfies the revocation condition, sending a request to reclaim the C-RNTI message to the access network control node.

When the UE enters an idle state to disconnect a Radio Resource Control Protocol (RRC) connection or the UE switches out of the range of the access network control node, the C-RNTI of the UE is reclaimed and remains in the local node as an idle C- RNTI.

An embodiment of the present invention further provides an access network node, including:

a receiving module, configured to receive a C-RNTI allocated by an access network control node;

And an allocation module, configured to allocate an idle C-RNTI from the C-RNTI to the designated UE.

Optionally, the foregoing access network node further has the following features:

The allocation module is further configured to: when the C-RNTI is allocated to the UE, if it is found that there is no idle C-RNTI, send a request to allocate an C-RNTI message to the access network control node.

Optionally, the access network node further has the following features: the access network node further includes:

a determining module, configured to: if it is determined that the number of idle C-RNTIs is less than the first preset threshold, and after the first preset time, send a request to the access network control node to allocate a C-RNTI message; Determining that the number of idle C-RNTIs that are owned is greater than a second preset threshold, and after transmitting the second preset time, sending a request to reclaim the C-RNTI message to the access network control node, where the request allocates a C-RNTI The message carries the difference between the number of required C-RNTIs or the number of idle C-RNTIs owned by the first preset threshold.

Optionally, the foregoing access network node further has the following feature: the access network node further includes: a determining module,

The receiving module is further configured to receive a reclaimed partial C-RNTI message of the access network control node, where the reclaimed part C-RNTI message carries information of a revocation condition;

The determining module is configured to: if it is determined that the owned C-RNTI satisfies the revocation condition, send a request to the access network control node to reclaim the C-RNTI message.

The recovery module is configured to: when the UE enters an idle state to disconnect the RRC connection or the UE switches out of the range of the access network control node, reclaiming the C-RNTI of the UE, and retaining the C-RNTI at the local node becomes idle C- RNTI.

Embodiments of the present invention also provide a computer readable storage medium storing computer executable instructions that implement the above method applied to an access network control node when the computer executable instructions are executed.

Embodiments of the present invention also provide a computer readable storage medium storing computer executable instructions that implement the above method applied to an access network node when the computer executable instructions are executed.

In summary, the embodiment of the present invention provides a method for managing a C-RNTI of a UE, and an access network node and an access network control node. Compared with the related art, the method of the embodiment of the present invention can be used as a UE. When the C-RNTI is allocated, it is avoided that the C-RNTI allocation needs to be requested from the control node every time, so that the base station can perform partial autonomous C-RNTI management, thereby reducing the delay in the C-RNTI allocation.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

The drawings used in the embodiments will be briefly described below, and the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to the drawings. .

1 is a schematic diagram of an access network control node according to an embodiment of the present invention;

2 is a schematic diagram of an access network node according to an embodiment of the present invention;

3 is a schematic flow chart of Embodiment 1 of the present invention;

4 is a schematic flow chart of Embodiment 2 of the present invention;

Figure 5 is a schematic flow chart of Embodiment 3 of the present invention;

6 is a schematic flow chart of Embodiment 4 of the present invention;

7 is a schematic flow chart of Embodiment 5 of the present invention;

8 is a schematic flow chart of Embodiment 6 of the present invention;

FIG. 9 is a schematic flow chart of Embodiment 7 of the present invention.

Embodiments of the invention

The technical solutions in the embodiments of the present invention are described in detail below with reference to the accompanying drawings in the embodiments of the present invention. The embodiments described are only a part of the embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present application without the inventive work are all within the scope of the present application.

The C-RNTI described in the embodiment of the present invention includes a cell radio network temporary identifier (C-RNTI), a semi-static cell radio network temporary identifier (SPS C-RNTI), and a temporary cell radio network temporary identifier (TC-RNTI).

In the embodiment of the present invention, the access network control node is referred to as a first node, and the node is an access network node that has C-RNTI allocation authority, including but not limited to an access network gateway (RAN GW) and a control plane anchor point (CP). Anchor), an eNB that has the C-RNTI allocation authority, and the like.

An access network node that is referred to as a UE to provide air interface access in the embodiment of the present invention is a second node, including but not limited to an eNB, an RRU/RRH, a Pico eNB, a Home eNB, a Relay Node, and the like.

The first node and the second node in the embodiment of the present invention may be connected by wire and/or wireless.

The first node and the second node in the embodiment of the present invention may be connected by a single hop and/or multiple hop.

In the ultra-dense network, when the C-RNTI allocation of the UE is performed, if the allocation management authority of the C-RNTI is reserved at the first node, the second node needs to allocate the C-RNTI to the UE, and needs to go to the first node. Requesting to allocate C-RNTI increases the delay of C-RNTI allocation.

An embodiment of the present invention provides a method for managing a C-RNTI of a UE, including the following steps: The first node sends multiple C-RNTIs to form a C-RNTI sequence/group/set to the second node.

The C-RNTI in the C-RNTI sequence/group/set is selected by the first node from the C-RNTI that is not allocated to other second nodes.

The C-RNTI in the C-RNTI sequence/group/set becomes the C-RNTI that is idle at the second node.

The first node may send the C-RNTI sequence/group/set to the second node when the first node and the second node perform initial interface establishment, or the first node may be in the second node to the first node. When the C-RNTI sequence/group/set is requested, the C-RNTI sequence is sent to the second node.

The first node determines parameter information required for C-RNTI management, such as a series of preset thresholds and preset times, and notifies the second node.

The first node may send the preset threshold and the preset time to the second node when the first node and the second node perform initial interface establishment.

The first node may also modify the values of the preset threshold and the preset time and notify the second node at any time after the first node and the second node establish an interface connection.

When the second node needs to allocate a C-RNTI to the UE, a C-RNTI is selected from the idle C-RNTI and allocated to the UE, and the number of idle C-RNTIs is correspondingly reduced.

When the UE and the second node disconnect the RRC connection or the UE switches out the first node control range, the second node that the UE last connects reserves the C-RNTI used by the UE, and the idle C-RNTI owned by the second node increases accordingly. .

When the second node needs to allocate a C-RNTI to the UE, it is found that there is no free C-RNTI. To be allocated, the second node requests the first node to allocate a C-RNTI sequence/group/set.

The number of C-RNTIs required by the second node may be carried in the message that the second node sends the C-RNTI sequence/group/set to the request sent by the first node, for example, the number of UEs that need to allocate the C-RNTI. .

When the number of idle C-RNTIs possessed by the second node is less than the first preset threshold and continues for the first preset time, the second node may request the first node to allocate the C-RNTI sequence/group/set.

The message that the second node sends the C-RNTI sequence/group/set to the request sent by the first node may carry the number of idle C-RNTIs of the second node, or the number of idle C-RNTIs of the second node and the first The difference between the preset thresholds.

After receiving the message that the second node requests to allocate the C-RNTI sequence/group/set, the first node sends a plurality of unassigned C-RNTIs to form a C-RNTI sequence/group/set to the second node.

When the number of idle C-RNTIs possessed by the second node is greater than a second preset threshold and continues for a second predetermined time, the second node requests the first node to reclaim part of the C-RNTI. After retraction, the number of idle C-RNTIs possessed by the second node is less than or equal to a second preset threshold.

When the number of idle C-RNTIs owned by the first node is less than a third preset threshold and continues for a third preset time, the first node notifies the second node to reclaim part of the C-RNTI.

The message that the first node notifies the second node to reclaim part of the C-RNTI may carry a fourth preset threshold and a fourth preset time.

After receiving the message of retrieving part of the C-RNTI sent by the first node, if the number of C-RNTIs possessed by the second node is greater than the fourth preset threshold, and the second node continues for the fourth preset time, the second The node requests the first node to reclaim part of the C-RNTI. After retraction, the number of idle C-RNTIs possessed by the second node is less than or equal to a fourth preset threshold.

FIG. 1 is a schematic diagram of an access network control node (ie, a first node) according to an embodiment of the present invention. As shown in FIG. 1 , the first node in this embodiment may include:

a setting module, configured to: select a plurality of C-RNTIs from the unassigned C-RNTIs to form a C-RNTI sequence/group/set that needs to be sent to the second node;

The sending module is configured to send a C-RNTI sequence/group/set to the second node, and request the second node to reclaim the C-RNTI.

The sending module is configured to: when the initial interface is established with the designated access network node (ie, the second node), send the selected C-RNTI to the designated access network node, or After receiving the C-RNTI message of the request of the designated access network node, the selected C-RNTI is sent to the designated access network node.

In an optional embodiment, the setting module may be further configured to determine parameter information for managing the C-RNTI, where the parameter information includes: a first preset threshold and a first preset time, and a second pre- a threshold value and a second preset time, where the parameter information is used to indicate that the number of idle C-RNTIs that the access network node (ie, the second node) has found is less than the first preset threshold, and After the first preset time is continued, the access network control node is requested to allocate a C-RNTI, and the number of idle C-RNTIs that the access network node finds to be found is greater than the second preset threshold. And after continuing the second preset time, requesting the access network control node to reclaim the C-RNTI;

The sending module may be further configured to send the parameter information to the designated access network node.

The sending module is configured to: when the initial interface is established with the designated access network node, send the parameter information to the designated access network node; or modify the parameter in the setting module. After the information, the modified parameter information is sent to the designated access network node.

In an optional embodiment, the first node may further include:

The recovery module is configured to: after receiving the request of the designated access network node to reclaim the C-RNTI message, recover a part of the C-RNTI.

In an optional embodiment, the first node may further include:

2 is a schematic diagram of an access network node (ie, a second node) according to an embodiment of the present invention. As shown in FIG. 2, the second node in this embodiment includes:

In an optional embodiment, the allocating module may be further configured to: when the C-RNTI is allocated to the UE, if it is found that there is no idle C-RNTI, send a request to allocate an C-RNTI message to the access network control node. .

In an optional embodiment, the second node may further include:

In an optional embodiment, the second node may further include: a determining module,

In an optional embodiment, the second node may further include:

a recovery module, configured to: when the UE enters an idle state to disconnect a Radio Resource Control Protocol (RRC) connection or the UE switches out of the range of the access network control node, reclaiming the C-RNTI of the UE, and retaining This node becomes an idle C-RNTI.

The method of the embodiment of the present invention will be described in detail below through several embodiments.

Embodiment 1

Fig. 3 is a flow chart of the present embodiment, and a detailed description of the steps unrelated to the present embodiment is omitted here. This embodiment describes a process in which a first node allocates a C-RNTI to a second node and notifies a preset threshold and a preset time when the first node and the second node establish an S1 connection, where the first node and the second node are located. The combination may be: a home base station gateway (HeNB GW) and a home base station HeNB, a mobility anchor (Mobility Anchor) and a micro base station (Pico eNB), a donor base station (Donor eNB), and a relay node (Relay Node, RN for short).

Step 101: The second node sends an S1 interface setup request message to the first node.

The S1 interface setup request message sent by the second node to the first node carries the identity identifier of the second node.

Step 102: The first node combines multiple unassigned C-RNTIs into a C-RNTI sequence.

The first node may determine the number of C-RNTIs in the C-RNTI sequence according to parameters such as the number of all the subordinate UEs, the speed of the C-RNTI consumption, and the number of unassigned C-RNTIs at the first node.

The C-RNTI in the C-RNTI sequence is selected by the first node from the C-RNTI that is not allocated to other nodes.

Step 103: The first node determines a preset threshold and a preset time.

The first node may determine the preset threshold and the preset time according to parameters such as the number of all the subordinate UEs, the speed of the C-RNTI consumption, and the number of unassigned C-RNTIs at the first node.

Step 104: The first node sends an S1 interface setup response message to the second node.

The S1 interface sent by the first node to the second node establishes a corresponding message, and in addition to carrying the identity identifier of the first node, the C-RNTI sequence determined in step 102 and the preset threshold determined in step 103 should be carried. And preset time.

So far, the method flow in this embodiment ends. With the above process, in the process of establishing the S1 interface, the second node obtains a C-RNTI sequence sent by the first node, and the sequence is composed of multiple C-RNTIs that are not allocated, and can be used by the second node to identify the access. The UE of the second node ensures that the C-RNTI does not change before and after the UE switches between all the second nodes connected to the first node, and also prevents the second node from frequently requesting the C-RNTI from the first node. At the same time, the second node obtains a preset threshold and a preset time for C-RNTI management determined by the first node.

In this embodiment, step 102 and step 103 may occur at the same time, so in actual application, the order of step 102 and step 103 may be arbitrarily changed.

Embodiment 2

Fig. 4 is a flow chart of the present embodiment, and a detailed description of the steps unrelated to the present embodiment is omitted here. This embodiment describes a process in which the first node and the second node establish an S1 connection, the first node allocates a C-RNTI to the second node, and notifies a preset threshold and a preset time, where the first node and the second node are used. The combination may be: a home base station gateway (HeNB GW) and a home base station HeNB, Mobility Anchor and Pico eNB, Donor eNB and relay node.

Step 201: The second node sends an S1 interface setup request message to the first node.

Step 202: The first node sends an S1 interface setup response message to the second node.

The S1 interface setup response message sent by the first node to the second node carries the identity identifier of the first node.

Step 203: The first node combines multiple unassigned C-RNTIs into a C-RNTI sequence.

Step 204: The first node determines a preset threshold and a preset time.

Step 205: The first node sends the C-RNTI sequence determined in step 203 to the second node, and the preset threshold and the preset time determined in step 204.

So far, the method flow in this embodiment ends. After the S1 interface between the first node and the second node is established, the second node obtains a C-RNTI sequence sent by the first node, and the sequence is composed of multiple C-RNTIs that are not allocated, and may be The second node is configured to identify the UE that accesses the second node, and ensures that the C-RNTI does not change before and after the handover between the second nodes connected to the first node, and the second node is frequently prevented from being the first The node requests the C-RNTI. At the same time, the second node obtains a preset threshold and a preset time for C-RNTI management determined by the first node.

In this embodiment, step 202, step 203, and step 204 may occur simultaneously, so in actual applications, the order of step 202, step 203, and step 204 may be arbitrarily changed.

In this embodiment, the first node in step 205 can simultaneously send a C-RNTI sequence, a preset threshold, and a preset time by using one signaling, or can be separately sent by using multiple signalings.

Embodiment 3

Fig. 5 is a flowchart of the present embodiment, and a detailed description of the steps unrelated to the present embodiment is omitted here. This embodiment describes a process in which the first node notifies the second node of the new preset threshold and the preset time.

Step 301: The first node determines a preset threshold and a preset time.

The first node may redetermine the preset threshold and the preset time according to parameters such as the number of all the subordinate UEs, the speed of the C-RNTI consumption, and the number of unassigned C-RNTIs at the first node.

Step 302: The first node sends a new preset threshold and a preset time to the second node.

So far, the method flow in this embodiment ends. With the above process, the second node obtains a new preset threshold and preset time for C-RNTI management.

Embodiment 4

Fig. 6 is a flowchart of the present embodiment, and a detailed description of the steps unrelated to the present embodiment is omitted here. The embodiment is directed to a process in which the second node requests the first node to allocate a C-RNTI sequence when the number of idle C-RNTIs is less than the first preset threshold.

Step 401: The second node determines that the number of idle C-RNTIs owned by the second node is less than a first preset threshold.

Step 402: The second node starts a timer, where the length of the timer is equal to the first preset time.

In step 403, the second node determines whether the timer expires. If the timeout expires, the process goes to step 404.

Step 404: The second node sends a message requesting allocation of the C-RNTI to the first node.

The message requesting to allocate the C-RNTI in the optional embodiment carries the difference between the number of idle C-RNTIs at the second node or the number of idle C-RNTIs at the second node and the first preset threshold.

Step 405: The first node combines multiple unassigned C-RNTIs into a C-RNTI sequence.

The first node may determine the C- according to the number of all the subordinate UEs, the speed of the C-RNTI consumption, the number of unassigned C-RNTIs at the first node, and the number of idle C-RNTIs at the second node. The number of C-RNTIs in the RNTI sequence.

The number of C-RNTIs in the C-RNTI sequence is at least greater than the difference between the first preset threshold and the number of idle C-RNTIs at the second node.

Step 406: The first node sends a sequence of C-RNTIs to the second node.

So far, the method flow in this embodiment ends. In the above process, after the number of idle C-RNTIs owned by the second node is less than the first preset threshold and continues for the first preset time, the first node may be requested to allocate a C-RNTI sequence to ensure that the second node has sufficient idleness. The C-RNTI is used to allocate to the UE.

Embodiment 5

Fig. 7 is a flowchart of the present embodiment, and a detailed description of the steps unrelated to the present embodiment is omitted here. This embodiment is directed to a process in which the second node requests the first node to reclaim part of the C-RNTI.

Step 501: The second node determines that the idle C-RNTI is more than a second preset threshold.

Step 502: The second node starts a timer, where the length of the timer is equal to the second preset time.

In step 503, the second node determines that the timer expires.

Step 504: The second node sends a message to the first node requesting to reclaim part of the C-RNTI.

The message requesting to reclaim part of the C-RNTI in the optional embodiment carries the sequence number of the C-RNTI that the second node needs to reclaim by the first node.

So far, the method flow in this embodiment ends. In the above process, after the second node has more idle C-RNTIs than the second preset threshold and continues for a second preset time, the first node may be requested to reclaim part of the C-RNTI, so as to avoid excessive occupation of the second node. C-RNTI resources.

Embodiment 6

Fig. 8 is a flowchart of the present embodiment, and a detailed description of the steps unrelated to the present embodiment is omitted here. This embodiment is directed to a process in which a second node needs to allocate a C-RNTI to a UE, and when it finds that there is not enough free C-RNTI, it requests a first node to allocate a C-RNTI sequence.

Step 601: The second node determines that no idle C-RNTI is allocated to the UE.

In this embodiment, the second node may allocate a C-RNTI to the UE in random access and handover preparation.

Step 602: The second node sends a message requesting to allocate a C-RNTI sequence to the first node.

The message requesting to allocate the C-RNTI sequence in the optional embodiment carries the required information of the second node. The number of C-RNTIs, for example, the number of UEs that need to allocate C-RNTI.

Step 603: The first node combines multiple unassigned C-RNTIs into a C-RNTI sequence.

The first node may be based on the number of all the subordinate UEs, the speed of the C-RNTI consumption, the number of unassigned C-RNTIs at the first node, the number of C-RNTIs required by the second node, and the second node. The first preset threshold and other parameters determine the number of C-RNTIs in the C-RNTI sequence sent to the second node.

The number of C-RNTIs in the C-RNTI sequence sent to the second node is at least greater than the sum of the number of C-RNTIs required by the second node and the first preset threshold.

Step 604: The first node sends a C-RNTI sequence to the second node.

So far, the method flow in this embodiment ends. In the foregoing process, if the second node allocates a C-RNTI to the UE and finds that no C-RNTI can be allocated, the second node may request the C-RNTI sequence to be allocated to the first node, so as to ensure that the second node can satisfy the current C. In addition to the requirements allocated by the RNTI, there are enough free C-RNTIs for subsequent allocation.

Example 7

Fig. 9 is a flowchart of the present embodiment, and a detailed description of the steps unrelated to the present embodiment is omitted here. The embodiment is directed to the process of requesting the second node to reclaim part of the C-RNTI when the number of unassigned C-RNTIs owned by the first node is less than a third preset threshold.

Step 701: The first node determines that the number of unassigned C-RNTIs that are owned is less than a third preset threshold.

Step 702: The first node starts a timer, and the length of the timer is equal to a third preset time.

Step 703: The first node determines whether the timer expires. If the timeout expires, the process goes to step 704.

Step 704: The first node requests the second node to reclaim part of the C-RNTI.

The message requesting to reclaim part of the C-RNTI in the optional embodiment carries a fourth preset threshold and a fourth preset time.

Step 705: The second node determines that the number of idle C-RNTIs owned by the second node is greater than a fourth preset threshold.

Step 706, the second node starts a timer, and the timer length is equal to the fourth preset time received in step 704.

Step 707: The second node determines whether the timer expires. If the timeout expires, the process proceeds to step 708.

Step 708: The second node requests the first node to reclaim part of the C-RNTI.

So far, the method flow in this embodiment ends. In the foregoing process, if the total C-RNTI resource is insufficient, the first node actively requests the second node to reclaim part of the C-RNTI, and sets a threshold for reclaiming the C-RNTI to ensure that there is sufficient C-RNTI at the first node. Resources.

In the ultra-dense network, the allocation authority of the cell radio temporary scheduling identifier C-RNTI of the UE is placed on the access network control node, and the C-RNTI remains unchanged when the UE moves within the control node of the access network. However, as described above, the allocation authority of the C-RNTI is reserved in the access network control node, which causes the allocation delay of the C-RNTI to become large. The embodiment of the invention proposes a new method for C-RNTI management. Compared with the related art, the embodiment of the present invention can prevent the C-RNTI from being jointly allocated by the control node and the control node and the base station to manage the C-RNTI. The node requests to allocate a C-RNTI, thereby reducing the delay in the C-RNTI allocation process.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct related hardware, such as a processor, which may be stored in a computer readable storage medium, such as a read only memory, disk or optical disk. Wait. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by a processor. / instruction to achieve its corresponding function. This application is not limited to any specific combination of hardware and software.

The above is only an optional embodiment of the present application, and the present application may have other various embodiments without Various changes and modifications can be made by those skilled in the art in light of the spirit and scope of the application, and the corresponding changes and modifications are intended to be included in the appended claims. range.

Industrial applicability

An embodiment of the present application provides a method for managing a C-RNTI of a UE and an access network node, which can avoid requesting a C-RNTI allocation to a control node every time when a C-RNTI is allocated to a UE, so that the base station can Partially autonomous C-RNTI management is performed to reduce the delay in C-RNTI allocation.

Claims

A method for managing a cell radio network temporary identifier C-RNTI of a user equipment UE is applied to an access network control node having a C-RNTI allocation authority, including:

The access network control node selects multiple C-RNTIs from unassigned C-RNTIs;

The selected C-RNTI is sent to the designated access network node.
The method of claim 1, wherein the access network control node sends the selected C-RNTI to the designated access network node when initial interface establishment with the designated access network node Or the access network control node sends the selected C-RNTI to the designated access network node after receiving the request to allocate the C-RNTI message by the specified access network node.
The method of claim 1, the method further comprising: the access network control node determining parameter information for managing the C-RNTI; and transmitting the parameter information to the designated access network node.
The method of claim 3, wherein

The access network control node sends the parameter information to the designated access network node when initial interface establishment with the designated access network node; or

The access network control node sends the modified parameter information to the designated access network node after modifying the parameter information.
The method according to claim 3 or 4, wherein the parameter information comprises: a first preset threshold and a first preset time, and a second preset threshold and a second preset time, wherein the parameter information is used Instructing the access network node to request allocation of C to the access network control node after discovering that the number of idle C-RNTIs owned by the access network node is less than the first preset threshold and continuing for the first preset time - RNTI, instructing the access network node to request to reclaim the access network control node after the number of idle C-RNTIs found to be greater than the second preset threshold and after the second preset time C-RNTI.
The method of claim 1 further comprising:

After receiving the request of the designated access network node to reclaim the C-RNTI message, the access network control node recovers part of the C-RNTI.
The method of claim 1 further comprising:

And if the access network control node determines that the number of idle C-RNTIs that are owned is less than a third preset threshold and continues for a third preset time, sending a reclaimed partial C-RNTI message to the designated access network node.
The method of claim 7 wherein said reclaimed portion C-RNTI message carries information of a reclaim condition.
An access network control node includes:

a setting module, configured to select a plurality of C-RNTIs from the unassigned cell radio network temporary identifier C-RNTI;

The sending module is configured to send the selected C-RNTI to the designated access network node.
The access network control node according to claim 9, wherein the sending module is configured to: when the initial interface establishment with the designated access network node is performed, send the selected C-RNTI to the designated interface After receiving the C-RNTI message, the selected C-RNTI is sent to the designated access network node after receiving the request to allocate the C-RNTI message.
The access network control node according to claim 9, wherein

The setting module is further configured to determine parameter information for managing the C-RNTI, where the parameter information includes: a first preset threshold and a first preset time, and a second preset threshold and a second preset time, The parameter information is used to indicate that the access network node detects that the number of idle C-RNTIs owned by the access network node is less than the first preset threshold, and continues to the access after the first preset time The network control node requests to allocate a C-RNTI, and indicates that the access network node finds that the number of idle C-RNTIs owned by the access network node is greater than the second preset threshold, and after the second preset time, The access control node requests to reclaim the C-RNTI;

The sending module is further configured to send the parameter information to the designated access network node.
The access network control node according to claim 11, wherein the sending module is configured to: send the parameter information to the designated access network when initial interface establishment with the designated access network node And after the setting module modifies the parameter information, the modified parameter information is sent to the designated access network node.
An access network control node according to any one of claims 9 to 12, said access network control The node further includes: a reclaiming module, configured to recover a part of the C-RNTI after receiving the request of the designated access network node to reclaim the C-RNTI message.
The access network control node according to any one of claims 9 to 12, wherein the access network control node further comprises: a recycling module, configured to: if it is determined that the number of idle C-RNTIs owned is less than the third pre- And setting a threshold for a third preset time, sending a reclaimed partial C-RNTI message to the designated access network node, where the reclaimed partial C-RNTI message carries information of a revocation condition.
A method for managing a cell radio network temporary identifier C-RNTI of a user equipment UE is applied to an access network node that provides air interface access for a UE, including:

Receiving a C-RNTI allocated by an access network control node;

An idle C-RNTI is selected from the C-RNTIs and allocated to the designated UE.
The method according to claim 15, wherein the method further comprises: when the access network node allocates a C-RNTI to the UE, if it finds that there is no free C-RNTI, sends a request allocation to the access network control node. C-RNTI message.
The method according to claim 15, further comprising: if the access network node determines that the number of idle C-RNTIs that are owned is less than a first preset threshold, and continues for a first preset time, The access network control node sends a request to allocate a C-RNTI message; if it is determined that the number of idle C-RNTIs is greater than a second preset threshold, and continues for a second preset time, sending a request to the access network control node The C-RNTI message is retrieved.
The method according to claim 16 or 17, wherein the request to allocate a C-RNTI message carries the difference between the number of required C-RNTIs or the number of owned idle C-RNTIs and the first preset threshold. value.
The method of any one of claims 15 to 17, the method further comprising:

Receiving a reclaimed partial C-RNTI message of the access network control node, where the reclaimed part C-RNTI message carries information of a revocation condition;

If it is determined that the owned C-RNTI satisfies the revocation condition, sending a request to reclaim the C-RNTI message to the access network control node.
The method of any one of claims 15 to 17, the method further comprising:

When the UE enters an idle state, the RRC connection is disconnected or the UE is switched out. When the access network controls the range of the node, the C-RNTI of the UE is reclaimed and remains at the local node to become an idle C-RNTI.
An access network node, comprising:

a receiving module, configured to receive a cell radio network temporary identifier C-RNTI allocated by the access network control node;

And an allocation module, configured to allocate an idle C-RNTI from the C-RNTI to the designated user equipment UE.
The access network node according to claim 21, wherein the allocating module is further configured to: when the C-RNTI is allocated to the UE, if it is found that there is no free C-RNTI, send a request to the access network control node. Assign a C-RNTI message.
The access network node of claim 21, the access network node further comprising: a determining module, configured to: if it is determined that the number of idle C-RNTIs that are owned is less than a first preset threshold, and continues for the first pre- After the time is set, the request is sent to the access network control node to allocate a C-RNTI message; if it is determined that the number of idle C-RNTIs is greater than the second preset threshold, and after the second preset time, the connection is performed. The network access control node sends a request to reclaim the C-RNTI message, where the request allocation C-RNTI message carries the number of required C-RNTIs or the number of idle C-RNTIs owned and the first preset threshold Difference.
The access network node of claim 21, the access network node further comprising: a determining module,

The receiving module is further configured to receive a reclaimed partial C-RNTI message of the access network control node, where the reclaimed part C-RNTI message carries information of a revocation condition;

The determining module is configured to: if it is determined that the owned C-RNTI satisfies the revocation condition, send a request to the access network control node to reclaim the C-RNTI message.
The access network node according to any one of claims 21 to 24, further comprising: a reclaiming module, configured to: when the UE enters an idle state, disconnect the RRC connection or the UE handover When the range of the access network control node is out, the C-RNTI of the UE is reclaimed and remains at the local node to become an idle C-RNTI.