CN102006633B - A kind of information indicating method, system and device - Google Patents

A kind of information indicating method, system and device Download PDF

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Publication number
CN102006633B
CN102006633B CN200910092135.4A CN200910092135A CN102006633B CN 102006633 B CN102006633 B CN 102006633B CN 200910092135 A CN200910092135 A CN 200910092135A CN 102006633 B CN102006633 B CN 102006633B
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member carrier
uplink member
carrier
ulccindex
information
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CN102006633A (en
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赵亚利
许芳丽
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China Academy of Telecommunications Technology CATT
Datang Mobile Communications Equipment Co Ltd
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China Academy of Telecommunications Technology CATT
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Abstract

The invention discloses a kind of information indicating method, system and device, in order to realize information instruction UE being sent to the uplink member carrier that upstream data uses in carrier aggregation system, making UE when sending upstream data, the uplink member carrier used can be determined.Does a kind of information indicating method provided by the invention comprise: evolved base station eNB receives the random access lead code Random from user equipment (UE)? Access? after Preamble, according to this Random? Access? Preamble generates accidental access response RAR message, wherein comprises and is used to indicate the information that described UE sends the uplink member carrier that upstream data uses; Described RAR message is sent to described UE by described eNB.

Description

A kind of information indicating method, system and device
Technical field
The present invention relates to communication technical field, particularly relate to a kind of information indicating method, system and device.
Background technology
The peak rate of advanced Long Term Evolution (LTE-A, LTE-Advanced) system improves a lot than Long Term Evolution (LTE), requires to reach descending 1Gbps, up 500Mbps.Meanwhile, require that lte-a system and LTE system have good compatibility.Compatible and make full use of the needs of frequency spectrum resource based on improving peak rate, with LTE system, lte-a system introduces carrier aggregation (CA, CarrierAggregation) technology.
Carrier aggregation technology refers to that up-downgoing respectively comprises multiple member carrier in a community, instead of only has the pattern of a set of carrier wave in LTE and wireless communication system before.In carrier aggregation system, each member carrier can be continuous or discrete, and in order to compatible with LTE system, the maximum bandwidth of each member carrier is 20MHz, and the bandwidth between each member carrier can be identical or different.
In LTE system, the reason that subscriber equipment (UE) or evolved base station (eNB) initiate Stochastic accessing mainly contains several as follows:
One, UE is from wireless heterogeneous networks free time (RRC_IDLE) state access (also referred to as initial access, initialaccess);
Two, wireless heterogeneous networks (RRC, RadioResourceControl) connection reconstruction;
Three, Stochastic accessing is needed in UE handoff procedure;
Four, UE is in when wireless heterogeneous networks connects (RRC_CONNECTED) state has downlink data to arrive;
Five, upstream data is had to arrive when UE is in RRC_CONNECTED state.
Reason for above-mentioned five kinds of Stochastic accessing can use the Random Access based on competition to carry out random access procedure, only has above-mentioned the third and the 4th kind of situation, non-competing Random Access can be used to carry out random access procedure.Wherein, competition Stochastic accessing is all initiated by UE, and non-competing Stochastic accessing is initiated by eNB.
But, prior art is after introducing CA technology, do not consider carrier wave dimension in accidental access response message, therefore support multiple member carrier due to up simultaneously, cause UE cannot determine transmit ascending data in which uplink member carrier according to accidental access response message.
Summary of the invention
Embodiments provide a kind of information indicating method, system and device, in order to realize information instruction UE being sent to the uplink member carrier that upstream data uses in carrier aggregation system, making UE when sending upstream data, the uplink member carrier used can be determined.
A kind of information indicating method that the embodiment of the present invention provides comprises:
After evolved base station eNB receives the random access lead code RandomAccessPreamble from user equipment (UE), generate accidental access response RAR message according to this RandomAccessPreamble, wherein comprise and be used to indicate the information that described UE sends the uplink member carrier that upstream data uses;
Described RAR message is sent to described UE by described eNB.
A kind of evolved base station that the embodiment of the present invention provides comprises:
Random access lead code receiving element, for receiving the random access lead code RandomAccessPreamble from user equipment (UE);
RAR generation unit, for generating accidental access response RAR message according to described RandomAccessPreamble, wherein comprising and being used to indicate the information that described UE sends the uplink member carrier that upstream data uses;
RAR transmitting element, for sending to described UE by described RAR message.
A kind of communication system that the embodiment of the present invention provides comprises: evolved base station eNB and at least one user equipment (UE);
Described eNB, after receiving the random access lead code RandomAccessPreamble from UE, accidental access response RAR message is generated according to this RandomAccessPreamble, wherein comprise and be used to indicate the information that described UE sends the uplink member carrier that upstream data uses, and described RAR message is sent to described UE;
Described UE, for sending described RandomAccessPreamble to described eNB, receive described RAR message, therefrom obtain and be used to indicate the information that self sends the uplink member carrier that upstream data uses, and need the uplink member carrier of use when determining to send upstream data according to this information.
The embodiment of the present invention, after eNB receives the RandomAccessPreamble from UE, generate accidental access response RAR message according to this RandomAccessPreamble, wherein comprise and be used to indicate the information that UE sends the uplink member carrier that upstream data uses; Described RAR message is sent to UE by eNB, thus in carrier aggregation system, achieves information instruction UE being sent to the uplink member carrier that upstream data uses, making UE when sending upstream data, can determine the uplink member carrier used.
Accompanying drawing explanation
The schematic flow sheet of a kind of information indicating method that Fig. 1 provides for the embodiment of the present invention;
The competition random access procedure schematic diagram that Fig. 2 provides for the embodiment of the present invention;
The non-competing random access procedure schematic diagram that Fig. 3 provides for the embodiment of the present invention;
The structural representation of a kind of evolved base station that Fig. 4 provides for the embodiment of the present invention.
Embodiment
Embodiments provide a kind of information indicating method, system and device, in order to realize information instruction UE being sent to the uplink member carrier that upstream data uses in carrier aggregation system, making UE when sending upstream data, the uplink member carrier used can be determined.
For multicarrier system, uply support multiple member carrier simultaneously, the embodiment of the present invention proposes a kind of at accidental access response (RAR, RandomAccessResponse) technical scheme of uplink member carrier indication information is comprised in message, just can know uplink next time uses which the concrete Physical Resource Block (PRB, PhysicalResourceBlock) in which or which uplink member carrier according to the ULgrant indication information in RAR message after making UE receive RAR message.
Below in conjunction with accompanying drawing, the technical scheme that the embodiment of the present invention provides is described.
See Fig. 1, a kind of information indicating method that the embodiment of the present invention provides comprises step:
After S101, eNB receive the random access lead code (RandomAccessPreamble) from UE, generate accidental access response (RAR) message according to this RandomAccessPreamble, wherein comprise and be used to indicate the information (can referred to as up-link carrier indication information) that UE sends the uplink member carrier that uses of upstream data.
The RAR message that step S101 generates is sent to UE by S102, eNB.
Preferably, be used to indicate the information that UE sends the uplink member carrier that upstream data uses, be included in the up license (ULgrant) in RAR message.
Preferably, be used to indicate the information that UE sends the uplink member carrier that upstream data uses, by uplink member carrier instructions field (ULCCindex) instruction arranged in ULgrant in advance.
Preferably, when the uplink member carrier that UE transmission upstream data uses only comprises a uplink member carrier, ULCCindex only indicates the indication information of a uplink member carrier, and the bit number that ULCCindex takies is , wherein N represents the number of the up-link carrier be polymerized in carrier aggregation system.
Preferably, when the uplink member carrier that UE transmission upstream data uses comprises multiple uplink member carrier, ULCCindex indicates the indication information of multiple uplink member carrier by the form of table of bits (bitmap), and the bit number that ULCCindex takies is the number of the up-link carrier be polymerized in carrier aggregation system.
Provide concrete explanation explanation below.
In multi-carrier systems, for competition Stochastic accessing, what the ULgrant in RAR distributed is the ascending physical signal resource used required for Msg3 uplink, comprise PRB position indication information concrete on concrete which up-link carrier indication information of use and this up-link carrier, certainly this ascending resource can be identical with sending the up-link carrier that random access lead code (RandomAccessPreamble) uses, like this in RAR just without the need to carrying up-link carrier indication information.
For non-competing Stochastic accessing, then need the indication information carrying the uplink member carrier used required for UE subsequent upstream transmission in RAR, otherwise UE cannot know which uplink member carrier the resource allocation information that ULgrant carries is for.
Certainly, also the uplink member carrier used required for Msg3 can be changed for competition Stochastic accessing, then the up-link carrier indicating mechanism of up-link carrier indicating mechanism and non-competing Stochastic accessing is similar, only needs the indication information carrying the uplink member carrier used required for UE subsequent upstream transmission in the ULgrant of RAR.
That is, the information indication scheme that the embodiment of the present invention provides, had both been applicable to non-competing Random Access, was also applicable to compete Random Access.
The flow process of competition Stochastic accessing as shown in Figure 2, mainly comprises four steps:
Msg1:UE accesses channel (RACH, randomaccesschannel) by uplink random and sends random access lead code (RandomAccessPreamble) to eNB.
After Msg2:eNB receives RandomAccessPreamble, generate accidental access response (RAR, RandomAccessResponse) message, and send to UE by downlink sharied signal channel (DL-SCH), comprise up license (ULgrant) in this message.
Msg3:UE carries out uplink on uplink shared channel (UL-SCH), different information is carried for different random access scene, such as wireless heterogeneous networks (RRC) connection establishment request message is sent for initial access (initialaccess) scene, RRC connection reconstruction message is sent for RRC connection reconstruction scene.
Msg4:eNB sends contention resolved message to UE.
The flow process of non-competing Stochastic accessing as shown in Figure 3, mainly comprises three steps:
Msg0:eNB is that UE distributes the special random access lead code of non-competing Stochastic accessing and sends Physical Random Access Channel (PRACH) resource of this random access lead code use.
Msg1:UE sends special RandomAccessPreamble to eNB in the PRACH resource of specifying.
Msg2:eNB sends accidental access response (RAR) message to UE, and this accidental access response message comprises the ULgrant of 20bit.
In the embodiment of the present invention, uplink member carrier instructions field (ULCCindex) can be increased in the ULgrant of RAR in the flow process of above-mentioned competition Stochastic accessing and non-competing random access process, send to indicate UE the uplink member carrier used required for upstream data.But the 20bit of the RAR that existing LTE system specifies can not satisfy the demands, therefore need the bit number increasing RAR, the concrete number increasing how many bit numbers and depend on the up link member carrier in CA system, and the indicating mode that ULCCindex is concrete.
After the ULgrant of the embodiment of the present invention in RAR adds uplink member carrier instructions field ULCCindex, the content in ULgrant specifically comprises:
Frequency hopping instruction (Hoppingflag-1bit), being set to 1 expression Physical Uplink Shared Channel (PUSCH) needs frequency hopping, otherwise does not need frequency hopping;
The resource block assignments (Fixedsizeresourceblockassignment-10bits) of fixed size;
The modulating-coding mechanism (Truncatedmodulationandcodingscheme-4bits) of brachymemma;
For the power control commands (TPCcommandforscheduledPUSCH-3bits) of the PUSCH of scheduling;
Upper line delay (ULdelay-1bit): represent whether PUSCH transmission postpones, for non-competing Stochastic accessing, retains this territory for competition Stochastic accessing;
Channel quality instruction (CQI) request (CQIrequest-1bit): being set to 1 expression PUSCH needs to carry CQI information, for non-competing Stochastic accessing, retains this territory for competition Stochastic accessing;
Uplink member carrier instructions field (ULCCindex): can indicate single uplink member carrier, also can indication carrier wave set (i.e. multiple uplink member carrier).
First the situation that ULCCindex only indicates a uplink member carrier is introduced below.
If ULCCindex only indicates a uplink member carrier, then its bit number can be expressed as wherein N represents the number of the up-link carrier be polymerized in carrier aggregation system.
For N=5, the numbering of the up-link carrier be polymerized in carrier aggregation system is respectively 0,1,2,3,4, then ULCCindex can use 3bit to represent, the implication of often kind of bit combination expression is as shown in table one below:
Bit combination Implication
000 Represent that PUSCH transmission uses the uplink member carrier being numbered 0
001 Represent that PUSCH transmission uses the uplink member carrier being numbered 1
010 Represent that PUSCH transmission uses the uplink member carrier being numbered 2
011 Represent that PUSCH transmission uses the uplink member carrier being numbered 3
100 Represent that PUSCH transmission uses the uplink member carrier being numbered 4
101 Reserved field
110 Reserved field
111 Reserved field
Table one
In addition, ULCCindex also can indicate multiple uplink member carrier, specific as follows:
If eNB can distribute the resource of multiple uplink member carrier to UE, then ULCCindex can use the mode of bitmap, indicate the indication information of multiple uplink member carrier, the bit number used under bitmap mode equals the number N of the up-link carrier be polymerized in carrier aggregation system.
For N=5, the numbering of the up-link carrier be polymerized in carrier aggregation system is respectively 0,1,2,3,4, then ULCCindex can use 5bit to represent, this 5bit information is a corresponding uplink member carrier respectively.
It should be noted that, when ULCCindex indicates a uplink member carrier, the mode of bitmap also can be used to indicate the indication information of a uplink member carrier.
Preferably, if ULgrant indicates in a certain uplink member carrier Resourse Distribute, then then can be set to 1 at the bit that this uplink member carrier is corresponding in ULCCindex, otherwise be set to 0.
Such as: ULCCindex is expressed as 00101, then its implication can corresponding for the Resourse Distribute in RAR be uplink member carrier 2 and uplink member carrier 4, namely UE can send upstream data in uplink member carrier 2 and uplink member carrier 4.Certainly, also can corresponding for the Resourse Distribute in RAR be uplink member carrier 0 and uplink member carrier 2, namely UE can send upstream data in uplink member carrier 0 and uplink member carrier 2.Specifically how to understand, depend on the negotiation that UE and eNB is prior.
A kind of communication system that the embodiment of the present invention provides comprises: evolved base station eNB and at least one user equipment (UE).
ENB, after receiving the random access lead code RandomAccessPreamble from UE, accidental access response RAR message is generated according to this RandomAccessPreamble, wherein comprise and be used to indicate the information that UE sends the uplink member carrier that upstream data uses, and RAR message is sent to UE.
UE, for sending RandomAccessPreamble to eNB, receive RAR message, therefrom obtain and be used to indicate the information that self sends the uplink member carrier that upstream data uses, and the uplink member carrier that when determining to send upstream data according to this information, needs use.
Preferably, see Fig. 4, a kind of evolved base station eNB that the embodiment of the present invention provides comprises:
Random access lead code receiving element 11, for receiving the random access lead code RandomAccessPreamble from UE.
RAR generation unit 12, for generating accidental access response RAR message according to RandomAccessPreamble, wherein comprising and being used to indicate the information that UE sends the uplink member carrier that upstream data uses.
RAR transmitting element 13, for sending to UE by RAR message.
Preferably, described RAR generation unit 12, is arranged on the information being used to indicate the uplink member carrier that UE transmission upstream data uses in the up license ULgrant in RAR message.
Preferably, described RAR generation unit 12, is used to indicate by the uplink member carrier instructions field ULCCindex instruction arranged in ULgrant in advance the information that UE sends the uplink member carrier that upstream data uses.
Preferably, described RAR generation unit 12, when the uplink member carrier determining that UE transmission upstream data uses only comprises a uplink member carrier, only indicated the indication information of a uplink member carrier by ULCCindex, the bit number that wherein ULCCindex takies is , N represents the number of the up-link carrier be polymerized in carrier aggregation system.
Preferably, described RAR generation unit 12, use the form of table of bits bitmap to indicate the indication information of one or more uplink member carrier by ULCCindex, the bit number that wherein ULCCindex takies is the number of the up-link carrier be polymerized in carrier aggregation system.
In sum, the embodiment of the present invention is for multicarrier system, the up situation simultaneously supporting multiple member carrier, propose the scheme increasing uplink member carrier indication information in a kind of ULgrant comprised at accidental access response RAR, after making UE receive RAR, just can know uplink next time uses which running time-frequency resource in which uplink member carrier, ensure that correctly carrying out of uplink.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims (7)

1. an information indicating method, is characterized in that, the method comprises:
After evolved base station eNB receives the random access lead code RandomAccessPreamble from user equipment (UE), generate accidental access response RAR message according to this RandomAccessPreamble, wherein comprise in the up license ULgrant be arranged in described RAR message, be used to indicate the information that described UE sends the Physical Resource Block PRB on the uplink member carrier that upstream data uses and the uplink member carrier used next time; Described information is indicated by the uplink member carrier instructions field ULCCindex arranged in described ULgrant in advance;
Described RAR message is sent to described UE by described eNB.
2. method according to claim 1, it is characterized in that, when the uplink member carrier that described UE transmission upstream data uses only comprises a uplink member carrier, described ULCCindex only indicates the indication information of a uplink member carrier, and the bit number that described ULCCindex takies is wherein N represents the number of the up-link carrier be polymerized in carrier aggregation system.
3. method according to claim 1, it is characterized in that, described ULCCindex is by the indication information of the form instruction uplink member carrier of table of bits bitmap, and the bit number that described ULCCindex takies is the number of the up-link carrier be polymerized in carrier aggregation system.
4. an evolved base station, is characterized in that, described base station comprises:
Random access lead code receiving element, for receiving the random access lead code RandomAccessPreamble from user equipment (UE);
RAR generation unit, for generating accidental access response RAR message according to described RandomAccessPreamble, wherein comprising in the up license ULgrant be arranged in described RAR message, being used to indicate the information that described UE sends the Physical Resource Block PRB on the uplink member carrier that upstream data uses and the uplink member carrier used next time; And indicate described information by the uplink member carrier instructions field ULCCindex arranged in described ULgrant in advance;
RAR transmitting element, for sending to described UE by described RAR message.
5. base station according to claim 4, it is characterized in that, described RAR generation unit, when the uplink member carrier determining that described UE transmission upstream data uses only comprises a uplink member carrier, only indicated the indication information of a uplink member carrier by described ULCCindex, the bit number that wherein said ULCCindex takies is n represents the number of the up-link carrier be polymerized in carrier aggregation system.
6. base station according to claim 4, it is characterized in that, described RAR generation unit, used the indication information of the form instruction uplink member carrier of table of bits bitmap by described ULCCindex, the bit number that wherein said ULCCindex takies is the number of the up-link carrier be polymerized in carrier aggregation system.
7. a communication system, is characterized in that, this system comprises: evolved base station eNB and at least one user equipment (UE);
Described eNB, after receiving the random access lead code RandomAccessPreamble from UE, accidental access response RAR message is generated according to this RandomAccessPreamble, wherein comprise in the up license ULgrant be arranged in described RAR message, be used to indicate the information that described UE sends the Physical Resource Block PRB on the uplink member carrier that upstream data uses and the uplink member carrier used next time, described information is indicated by the uplink member carrier instructions field ULCCindex arranged in described ULgrant in advance; And described RAR message is sent to described UE;
Described UE, for sending described RandomAccessPreamble to described eNB, receive described RAR message, therefrom obtain and be used to indicate the information that self sends the uplink member carrier that upstream data uses, and need the uplink member carrier of use when determining to send upstream data according to this information.
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