CN104427634B - Signaling method and device - Google Patents
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- CN104427634B CN104427634B CN201310392440.1A CN201310392440A CN104427634B CN 104427634 B CN104427634 B CN 104427634B CN 201310392440 A CN201310392440 A CN 201310392440A CN 104427634 B CN104427634 B CN 104427634B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
Abstract
The invention discloses a kind of signaling method and devices, wherein this method comprises: receiving and decoding the Msg3 for carrying out user terminal, wherein carry Non-Access Stratum signaling in the Msg3；Judge whether the Msg3 is link setup or reconstruction request；If the determination result is NO, which is sent to core net.Through the invention, it solves the problems, such as that the terminal in group system cannot send Non-Access Stratum signaling to network in disconnected state, to provide a kind of method for sending Non-Access Stratum signaling to network in disconnected state, improves the efficiency of system.
Description
Technical field
The present invention relates to the communications fields, in particular to a kind of signaling method and device.
Background technique
Connecing in long term evolution specified in standard (Long Term Evolution, referred to as LTE) system at random at present
Enter there are two types of processes, the random access of random access and contention resolved including non-competing solution.
Fig. 1 is according to the flow diagram of the random access procedure of the non-competing solution of the relevant technologies, as shown in Figure 1, packet
Include following steps:
Step 1: terminal is in connected state, receives specified leading (Preamble) code of network；
Step 2: terminal triggers random access, sends the Preamble code as leading；
Step 3: terminal receives random access response (Random Access Response, referred to as RA
Response), random access procedure terminates, and the data for continuing connected state are sent.
Fig. 2 is according to the flow diagram of the random access procedure of the contention resolved of the relevant technologies, as shown in Fig. 2, including
Following steps:
Step 1: terminal is in Idle state, and link setup is initiated on upper layer or reconstruction request, i.e. CCCH DATA REQ are therein
CCCH(Common Control Channel) refer to common control channel；
Step 2: terminal triggers random access, chooses a corresponding Preamble code as leading；
Step 3: terminal receives RA Response, is authorized using it and sends message 3(Massage3, referred to as Msg3),
Include CCCH DATA；Wherein, so-called Msg3 refers to the Article 3 message in random access procedure, because in the mistake of random access
The content of Cheng Zhong, these message are not fixed, and that may sometimes carry is radio resource control (Radio Resource
Control, referred to as RRC) connection request, sometimes may be with some control messages, therefore referred to as Msg3；
Step 4: evolved node B(evolved Node B, referred to as eNB) Msg3 is received, after parsing, judgement is to build
Chain or reconstruction request, then be at war with solution, and contention resolved result is sent to terminal by Msg4；Wherein, so-called
Msg4 refers to accidental access response message；
Step 5: terminal receives Msg4, judges whether contention resolved success, if it succeeds, parsing the CCCH DL
Msg carries out configuration RRC connected state resource, and into connected state, DL therein refers to data link (Data Link).
Inventor has found in the course of the research: in group system, user's directed networks send the need of Non-Access Stratum signaling
Ask, but in a standard as defined in do not support in random access procedure terminal disconnected state (Idle state, listen state etc.) directly
Non-Access Stratum signaling is sent to network.
For the terminal in group system in the related technology Non-Access Stratum signaling cannot be sent to network in disconnected state
Problem, currently no effective solution has been proposed.
Summary of the invention
The present invention provides a kind of signaling method and devices, at least to solve the above problems.
According to an aspect of the invention, there is provided a kind of signaling method, comprising: receive and decode from user's end
The Msg3 at end, wherein Non-Access Stratum signaling is carried in the Msg3；Judge whether the Msg3 is link setup or reconstruction request；
If the determination result is NO, the Non-Access Stratum signaling is sent to core net.
Preferably, the Non-Access Stratum signaling includes: group service signaling.
Preferably, described after the Non-Access Stratum signaling carried in the Msg3 is sent to the core net
Method further include: without sending contention resolved as a result, directly terminating random access procedure to the user terminal.
Preferably, before receiving and decoding the Msg3 from the user terminal, the method also includes: it receives
Preface information from the user terminal；Random access response corresponding with the preface information is sent to the user terminal
Information.
Preferably, the corresponding lead code of the preface information is from selection middle between multiple preamble regions, wherein described more
Lead code between the same preamble region between a preamble region is used for the random access of the same type, the random access
Type include following one: the random access of LTE contention resolved, the random access of non-competing solution or cluster random access.
Preferably, the lead code is the size according to the Non-Access Stratum signaling, before for cluster random access
The lead code chosen in leading code section.
According to another aspect of the present invention, a kind of signaling sending device is additionally provided, comprising: processing module, for connecing
It receives and decodes the Msg3 for carrying out user terminal, wherein carry Non-Access Stratum signaling in the Msg3；Judgment module, for sentencing
Whether the Msg3 that breaks is link setup or reconstruction request；First sending module is used for if the determination result is NO, will be described
Non-Access Stratum signaling is sent to core net.
Preferably, described device further include: receiving module, for receiving the preface information from the user terminal；The
Two sending modules, for sending random access response information corresponding with the preface information to the user terminal.
Preferably, the corresponding lead code of the preface information is from selection middle between multiple preamble regions, wherein described more
Lead code between the same preamble region between a preamble region is used for the random access of the same type, the random access
Type include following one: the random access of LTE contention resolved, the random access of non-competing solution or cluster random access.
Preferably, the lead code is the size according to the Non-Access Stratum signaling, before for cluster random access
The lead code chosen in leading code section.
Through the invention, using receiving and decode the Msg3 come user terminal, wherein carried in the Msg3 non-access
Layer signaling；Judge whether Msg3 is link setup or reconstruction request；If the determination result is NO, which is sent out
It send and solves the terminal in group system to the mode of core net and cannot send Non-Access Stratum signaling to network in disconnected state
Problem improves the efficiency of system to provide a kind of method for sending Non-Access Stratum signaling to network in disconnected state.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the flow diagram according to the random access procedure of the non-competing solution of the relevant technologies；
Fig. 2 is the flow diagram according to the random access procedure of the contention resolved of the relevant technologies；
Fig. 3 is the flow diagram of signaling method according to an embodiment of the present invention；
Fig. 4 is the structural block diagram of signaling sending device according to an embodiment of the present invention；
Fig. 5 is the preferred structure block diagram of signaling sending device according to an embodiment of the present invention；
Fig. 6 is the main flow schematic diagram of random access procedure according to the preferred embodiment of the invention；
Fig. 7 is the flow diagram that signaling is sent in random access procedure according to the preferred embodiment of the invention.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Step shown in the flowchart of the accompanying drawings can be in a computer system such as a set of computer executable instructions
It executes, although also, logical order is shown in flow charts, and it in some cases, can be to be different from herein suitable
Sequence executes shown or described step.
A kind of signaling method is present embodiments provided, Fig. 3 is signaling method according to an embodiment of the present invention
Flow diagram, as shown in figure 3, the process includes the following steps:
Step S302 is received and is decoded the Msg3 for carrying out user terminal, wherein Non-Access Stratum letter is carried in the Msg3
It enables；
Step S304 judges whether Msg3 is link setup or reconstruction request；
The Non-Access Stratum signaling is sent to core net if the determination result is NO by step S306.
Through the above steps, Non-Access Stratum signaling is carried in Msg3 in the random access procedure, is determined in eNode B
In the case that Msg3 is not link setup or reconstruction request, this Non-Access Stratum signaling is transmitted directly to core net, relative to correlation
The random access procedure of non-competing solution in technology, the user terminal in the present embodiment may be at disconnected state (for example, empty
Not busy state listens state), i.e., Non-Access Stratum can be obtained from user terminal by not needing to establish data link between user terminal and base station
Signaling is simultaneously sent to core net；Random access procedure relative to contention resolved in the related technology is just built after contention resolved
Vertical data link transmission data (such as Non-Access Stratum signaling), the present embodiment may be implemented not need to establish data link can
Send Non-Access Stratum signaling.Solve through this embodiment terminal in group system cannot be sent to network in disconnected state it is non-
The problem of access layer signaling, to provide a kind of method for sending Non-Access Stratum signaling to network in disconnected state.Due to collection
It does not need to receive to respond after some Non-Access Stratum signalings (such as advertised information, status information etc.) sent in group's system and disappear
Breath, therefore, even if establishing data link due to not having other data to send, terminal still can be again introduced into disconnected state,
To reduce efficiency, signal resource is wasted.Therefore, after using the scheme of the present embodiment, the expense of signaling has been saved, has been improved
The efficiency of system.
Preferably, user terminal is in disconnected state when sending Msg3, which includes: Idle state or listen shape
State.
The Non-Access Stratum signaling carried in Msg3 is not limited to specific Non-Access Stratum signaling, it is preferable that this is non-access
Layer signaling can be group service signaling.
Preferably, after the Non-Access Stratum signaling that will be carried in Msg3 is sent to core net, user terminal can be no longer
Be at war with solution, base station without to user terminal send contention resolved result (Msg4), but can directly terminate with
Machine access process.
Preferably, before receiving and decoding and carry out the Msg3 of user terminal, the random access procedure of this method can be with
It include: to receive the preface information for carrying out user terminal；Random access response corresponding with the preface information is sent to user terminal
Information.
Preferably, the corresponding lead code of above-mentioned preface information is user terminal or network side between multiple preamble regions
Middle selection, wherein the random of a type can be respectively corresponded between each preamble region between this multiple preamble region
Access, the type of these random access can be following one kind: the random access of LTE contention resolved, non-competing solution with
Machine access or cluster random access.That is, lead code is divided into multiple sections in the present embodiment, by cluster random access list
Between solely marking off a preamble region, so as to avoid the LTE user RA under newly-increased cluster user and original system from colliding
The increase of probability.Wherein, the random access of LTE contention resolved and the random access of non-competing solution are using the application background
The mode of two kinds of random access described in technology；Cluster random access includes the random access and cluster of cluster contention resolved
The random access of non-competing solution.It should be noted that can be sent proposed in the present embodiment Non-Access Stratum signaling with
Machine access procedure can be used the lead code between any one preamble region between multiple preamble region, i.e. lead code
Choose the application and implementation for being not intended to limit the present embodiment.Preferably, the above-mentioned random access procedure of the present embodiment is chosen for collecting
Lead code between the preamble region of group's random access generates preface information, and in this case, the present embodiment can be used for
Signaling related with group service is sent to core net in random access procedure.
Preferably, user terminal can be according to the size of Non-Access Stratum signaling, from the lead code for cluster random access
Lead code is chosen in section, for example, in scheduled lead flag section (i.e. between preamble region), according to will carry in Msg3
Non-Access Stratum signaling size choose lead code, wherein each lead flag in scheduled lead flag section is used for
Indicate corresponding lead code for cluster random access.More specifically, can by 64 it is leading in scheduled lead flag section
It is divided into the dedicated lead flag of cluster random access, then base station is after receiving preface information according in the preface information
Identification information just can determine that the preface information is for cluster random access.
The present embodiment additionally provides a kind of signaling sending device, and the signaling sending device is for realizing above-mentioned signaling sender
Method, signaling sending device concrete implementation process described in Installation practice had carried out specifically in embodiment of the method
Bright, details are not described herein.
Fig. 4 is the structural block diagram of signaling sending device according to an embodiment of the present invention, as shown in figure 4, the device includes place
Manage module 42, judgment module 44 and the first sending module 46, wherein processing module 42 carrys out user terminal for receiving and decoding
Msg3, wherein Non-Access Stratum signaling is carried in Msg3；Judgment module 44 is coupled to processing module 42, for judging Msg3
It whether is link setup or reconstruction request；First sending module 46 is coupled to judgment module 44, the situation for being no in judging result
Under, Non-Access Stratum signaling is sent to core net.
Involved module, unit can be realized by way of software in the embodiment of the present invention, can also pass through
The mode of hardware is realized.Described module in the present embodiment, unit also can be set in the processor, for example, can be with
Description are as follows: a kind of processor includes processing module 42, judgment module 44 and the first sending module 46.Wherein, the name of these modules
Claim not constituting the restriction to the module itself under certain conditions, for example, processing module is also described as " for receiving
And decode the module for carrying out the Msg3 of user terminal ".
It should be noted that the similar description such as " the first sending module " mentioned in the present embodiment, " the second sending module "
In " first ", the descriptions such as " second " be only used for being not construed as the mark of the module perhaps unit these units or
There is the restriction of sequence aspect between module.Also, in some cases, above-mentioned the first sending module and the second sending module
It is also possible to the same module or different modules, herein and without limitation.
Preferably, Non-Access Stratum signaling described above includes: group service signaling.
Preferably, device further include: module is terminated, for being sent to core in the Non-Access Stratum signaling that will be carried in Msg3
After heart net, directly terminate random access procedure, without to user terminal send contention resolved as a result,
Fig. 5 is the preferred structure block diagram of signaling sending device according to an embodiment of the present invention, as shown in Figure 5, it is preferable that should
Device further include: receiving module 52 and the second sending module 56, wherein before receiving module 52 carrys out user terminal for reception
Lead information；Second sending module 56 is coupled to receiving module 52, corresponding with preface information random for sending to user terminal
Access response message.
Preferably, the corresponding lead code of above-mentioned preface information is from selection middle between multiple preamble regions, wherein multiple
Lead code between the same preamble region between preamble region is used for the random access of the same type, the random access
Type includes following one: the random access of LTE contention resolved, the random access of non-competing solution or cluster random access.
Preferably, lead code is the size according to Non-Access Stratum signaling, between the preamble region for cluster random access
The lead code of middle selection.
It is described and illustrates below with reference to preferred embodiment.
First the abbreviation in this preferred embodiment is illustrated:
User terminal, User Equipment, referred to as UE；
Wireless interface between UTRAN and user equipment, The Radio interface between UTRAN and
The User Equipment, referred to as Uu, are the air interfaces of WCDMA system；
Hardware address, Medium Access Control(protocol layering context), referred to as MAC:
Random access channel, Random Access Channel, referred to as RACH；
Dedicated channel, Dedicated Channel are referred to as DCH；
Wireless network temporarily identifies, Radio Network Temporary Identifier, referred to as RNTI；
Dedicated control channel, Dedicated Control Channel, referred to as DCCH；
Dedicated Traffic Channel, Dedicated Traffic Channel, referred to as DTCH；
Broadcast channel, Broadcast Channel, referred to as BCH；
Management information bank, Management Information Base, referred to as MIB；
System information block, System Information Block, referred to as SIB；
Cluster group control channel, Trunking Group Control Channel, referred to as TGCCH；
Cluster group Traffic Channel, Trunking Group Traffic Channel, referred to as TGTCH；
Access layer, Access Stratum, referred to as AS.
The scheme of this preferred embodiment is illustrated below.
The purpose of this preferred embodiment is, in order to meet the needs of LTE clustering functionality, based on former LTE system,
The end UE extends the mode of random access, and is adjusted to the resource management mode of random access, avoids influencing original LTE system
System is finally reached terminal in disconnected state, can directly send the purpose of signaling to network by CCCH channel.
The scheme of this preferred embodiment includes the following steps:
Step 1, terminal is switched on, and accesses cluster multi call, becomes and listens user.Listen the state of user similar to the RRC free time
(idle) state, but monitor common down channel TGCCH and TGTCH；
Step 2, user need uploaded state report (one kind of Non-Access Stratum signaling), at this time by CCCH channel initiate with
Machine access procedure；
Step 3, the segment of cluster is found in 64 Preamble ID sequences, and according to data to be transferred (on needing
The state report of report) size therefrom choose a Preamble code, send preface information (Msg1)；
Step 4, eNB solution is to Msg1, and by section where judging the Preamble ID, determination is that group service is initiated
Random access constructs corresponding Msg2, is sent to terminal；Later, terminal sends Msg3 to eNB.
Step 5, eNB solution is decoded the message to Msg3, judges whether link setup or reconstruction request by decoding, such as
Fruit is not, then it is assumed that is the distinctive signaling of cluster, passes through core net, be not necessarily to contention resolved, no longer reply terminal (is no longer sent out
Send Msg4)；If it is link setup or reconstruction request, then be at war with solution, and the result of contention resolved is sent to by Msg4
Terminal；
Step 6, user has sent Msg3, then voluntarily terminates the process of random access (RA), default contention resolved success.
Wherein, Preamble ID sequence can be set as: Preamble total number is 64, is divided into three parts:
To the use of common LTE competition random access, (a, index as 0~a-1) a part；A part uses (b to cluster random access
It is a, index a~a+b-1)；It is remaining to use (optional, 64-a-b, to index a+b~63) to non-competing random access.
Preamble is split using aforesaid way, the area Preamble used by increasing cluster random access newly
Between, to reduce the probability for influencing the user RA collision of original LTE system because of the increase of cluster user.
Using the above scheme of this preferred embodiment so that user in Idle state without setting up private resource, pass through CCCH
Random access procedure on channel, so that it may signaling is directly sent to core net.
The random access procedure of this preferred embodiment is illustrated with reference to the accompanying drawing.
Fig. 6 is the main flow schematic diagram of random access procedure according to the preferred embodiment of the invention, is shown in FIG. 6
UE sends random access preamble, base station in response random access and UE to base station and carries out scheduled transmission to base station
(ScheduledTransmission) signalling of bouquet traffic signaling.Fig. 7 is random access mistake according to the preferred embodiment of the invention
The flow diagram of signaling is sent in journey, is shown in cluster communication system in Fig. 7, one is exhaled the UE of pleasant to the ear state in group,
The process of signaling is sent to network by random access.The process includes the following steps:
Step 1, terminal are in Idle state, upper layer signalling of bouquet signaling (CCCH DATA REQ), and specified random access
Type is cluster noncompetitive pattern (i.e. using the cluster random access mode of the random access of the embodiment of the present application)；
Step 2, before terminal chooses a Preamble ID conduct in the section Preamble (a~a+b-1) of cluster
It leads.Leading (the RA Preamble) is sent by PRACH channel；
Step 3 receives the RA Response of eNB reply；
Step 4 sets up Msg3 according to the authorization in RA Response, wherein containing the letter that will be sent to core net
Information is enabled, final encapsulation is sent to eNB in a UL-CCCH-Message；
Step 5 after eNB receives Msg3 and parses, judges that the Msg3 for non-link setup or non-reconstruction request, is then directly extracted
Non-Access Stratum (Non-Access Stratum, referred to as NAS) signaling therein, is sent to core net, Non-Access Stratum therein
Signaling can be three signaling of layer or the signaling of other Non-Access Stratums；
Step 6, UE terminate the RA process, reply upper layer RA success (success).
Through the above embodiments of the present invention, the terminal solved in group system cannot be sent in disconnected state to network
The problem of Non-Access Stratum signaling, improves to provide a kind of method for sending Non-Access Stratum signaling to network in disconnected state
The efficiency of system.
Obviously, those skilled in the art should be understood that each module of the above invention or each step can be with general
Computing device realize that they can be concentrated on a single computing device, or be distributed in multiple computing devices and formed
Network on, optionally, they can be realized with the program code that computing device can perform, it is thus possible to which they are stored
Be performed by computing device in the storage device, perhaps they are fabricated to each integrated circuit modules or by they
In multiple modules or step be fabricated to single integrated circuit module to realize.In this way, the present invention is not limited to any specific
Hardware and software combines.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of signaling method, characterized by comprising:
It receives and decodes the random access Article 3 message Msg3 for carrying out user terminal, wherein carry non-connect in the Msg3
Enter a layer signaling；
Judge whether the Msg3 is link setup or reconstruction request；
If the determination result is NO, the Non-Access Stratum signaling is sent to core net.
2. the method according to claim 1, wherein the Non-Access Stratum signaling includes: group service signaling.
3. the method according to claim 1, wherein in the Non-Access Stratum signaling that will be carried in the Msg3
It is sent to after the core net, the method also includes:
Without sending contention resolved as a result, directly terminating random access procedure to the user terminal.
4. the method according to claim 1, wherein receiving and decoding from described in the user terminal
Before Msg3, the method also includes:
Receive the preface information from the user terminal；
Random access response information corresponding with the preface information is sent to the user terminal.
5. according to the method described in claim 4, it is characterized in that, the corresponding lead code of the preface information is from multiple leading
It is chosen in code section, wherein the lead code between the same preamble region between the multiple preamble region is for same
The type of the random access of a type, the random access includes following one: the random access of LTE contention resolved, non-competing solution
Random access or cluster random access certainly.
6. according to the method described in claim 5, it is characterized in that, the lead code is according to the big of the Non-Access Stratum signaling
It is small, from the lead code of selection middle between the preamble region for cluster random access.
7. a kind of signaling sending device, characterized by comprising:
Processing module carrys out the random access Article 3 message Msg3 of user terminal for receiving and decoding, wherein the Msg3
In carry Non-Access Stratum signaling；
Judgment module, for judging whether the Msg3 is link setup or reconstruction request；
First sending module, for if the determination result is NO, the Non-Access Stratum signaling being sent to core net.
8. device according to claim 7, which is characterized in that described device further include:
Receiving module, for receiving the preface information from the user terminal；
Second sending module, for sending random access response information corresponding with the preface information to the user terminal.
9. device according to claim 8, which is characterized in that the corresponding lead code of the preface information is from multiple leading
It is chosen in code section, wherein the lead code between the same preamble region between the multiple preamble region is for same
The type of the random access of a type, the random access includes following one: the random access of LTE contention resolved, non-competing solution
Random access or cluster random access certainly.
10. device according to claim 9, which is characterized in that the lead code is according to the Non-Access Stratum signaling
Size, from the lead code of selection middle between the preamble region for cluster random access.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310392440.1A CN104427634B (en) | 2013-09-02 | 2013-09-02 | Signaling method and device |
| PCT/CN2013/087364 WO2014169648A1 (en) | 2013-09-02 | 2013-11-18 | Signaling sending method and apparatus |
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|---|---|---|---|
| CN201310392440.1A CN104427634B (en) | 2013-09-02 | 2013-09-02 | Signaling method and device |
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| CN107343322B (en) * | 2016-04-29 | 2023-05-16 | 中兴通讯股份有限公司 | Competition access method and device |
| FI3813471T3 (en) * | 2018-06-19 | 2023-05-05 | Guangdong Oppo Mobile Telecommunications Corp Ltd | Method for indicating channel access type, terminal device and network device |
| CN110418422B (en) * | 2019-08-07 | 2021-04-13 | 北京运安智维科技有限公司 | Method, system and device for reporting cluster user equipment capacity |
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|---|---|---|---|---|
| WO2010135628A2 (en) * | 2009-05-22 | 2010-11-25 | Qualcomm Incorporated | Setting up a communication session within a wireless communications system |
| CN101998660A (en) * | 2009-08-12 | 2011-03-30 | 大唐移动通信设备有限公司 | Method, system and device for sending signaling |
| CN102014516A (en) * | 2010-11-18 | 2011-04-13 | 北京邮电大学 | Random access method in (LTE)-A system |
| CN103067880A (en) * | 2013-01-09 | 2013-04-24 | 中兴通讯股份有限公司 | Method of sending clustering messages, network side equipment and terminal equipment |
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2013
- 2013-09-02 CN CN201310392440.1A patent/CN104427634B/en active Active
- 2013-11-18 WO PCT/CN2013/087364 patent/WO2014169648A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010135628A2 (en) * | 2009-05-22 | 2010-11-25 | Qualcomm Incorporated | Setting up a communication session within a wireless communications system |
| CN101998660A (en) * | 2009-08-12 | 2011-03-30 | 大唐移动通信设备有限公司 | Method, system and device for sending signaling |
| CN102014516A (en) * | 2010-11-18 | 2011-04-13 | 北京邮电大学 | Random access method in (LTE)-A system |
| CN103067880A (en) * | 2013-01-09 | 2013-04-24 | 中兴通讯股份有限公司 | Method of sending clustering messages, network side equipment and terminal equipment |
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| WO2014169648A1 (en) | 2014-10-23 |
| CN104427634A (en) | 2015-03-18 |
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