CN102006633A - Information indication method, system and device - Google Patents
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- CN102006633A CN102006633A CN2009100921354A CN200910092135A CN102006633A CN 102006633 A CN102006633 A CN 102006633A CN 2009100921354 A CN2009100921354 A CN 2009100921354A CN 200910092135 A CN200910092135 A CN 200910092135A CN 102006633 A CN102006633 A CN 102006633A
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- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 41
- 230000004044 response Effects 0.000 claims abstract description 20
- 230000002776 aggregation Effects 0.000 claims description 18
- 238000004220 aggregation Methods 0.000 claims description 18
- 230000005540 biological transmission Effects 0.000 claims description 18
- 238000006116 polymerization reaction Methods 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 5
- 230000000379 polymerizing effect Effects 0.000 abstract 1
- 230000008569 process Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000000969 carrier Substances 0.000 description 4
- 238000013468 resource allocation Methods 0.000 description 4
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Abstract
The invention discloses information indication method, system and device for realizing the information indication of an upstream member carrier for sending upstream data to UE (User Equipment) in a carrier polymerizing system so that the UE can determine the used upstream member carrier when sending the upstream data. The information indication method provided in the invention comprises the following step of: generating random access response (RAR) information according to Random Access Preamble after an evoluted base station (eNB) receives the Random Access Preamble from the UE, wherein the information includes the information for indicating the upstream member carrier used for the UE to send the upstream data; and sending the RAR information to the UE by using the eNB.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of information indicating method, system and device.
Background technology
(LTE-A, LTE-Advanced) peak rate of system improves a lot than Long Term Evolution (LTE) advanced Long Term Evolution, requires to reach descending 1Gbps, up 500Mbps.Simultaneously, require LTE-A system and LTE system that good compatibility is arranged.Based on improve peak rate, with LTE system compatible and the needs that make full use of frequency spectrum resource, the LTE-A system has introduced carrier aggregation (CA, CarrierAggregation) technology.
Carrier aggregation technology is meant that up-downgoing respectively comprises a plurality of member carriers in a sub-district, rather than has only the pattern of a cover carrier wave before in LTE and the wireless communication system.Each member carrier can be continuous or discrete in carrier aggregation system, for the LTE system compatible, the maximum bandwidth of each member carrier is 20MHz, the bandwidth between each member carrier can be identical or different.
In the LTE system, the reason that subscriber equipment (UE) or evolved base station (eNB) are initiated to insert at random mainly contains following several:
One, UE inserts (being also referred to as initial access, initial access) from idle (RRC_IDLE) state of Radio Resource control;
Two, Radio Resource control (RRC, Radio Resource Control) connection reconstruction;
Three, need to insert at random in the UE handoff procedure;
There is downlink data to arrive when four, UE is in Radio Resource control connection (RRC_CONNECTED) state;
There is upstream data to arrive when five, UE is in the RRC_CONNECTED state.
Can use based on the access way at random of competition for above-mentioned five kinds of reasons that insert at random and to carry out random access procedure, have only above-mentioned the third and the 4th kind of situation, can use non-competing access way at random to carry out random access procedure.Wherein, competition inserts all at random and is initiated by UE, and non-competing the access at random initiated by eNB.
Yet, prior art is after introducing the CA technology, therefore do not consider the carrier wave dimension in the accidental access response message, owing to uply support a plurality of member carriers simultaneously, cause UE can't determine transmit ascending data on which uplink member carrier according to accidental access response message.
Summary of the invention
The embodiment of the invention provides a kind of information indicating method, system and device, in order in carrier aggregation system, to realize UE is sent the information indication of the employed uplink member carrier of upstream data, make UE when sending upstream data, can determine the uplink member carrier of using.
A kind of information indicating method that the embodiment of the invention provides comprises:
After evolved base station eNB receives random access lead code RandomAccess Preamble from user equipment (UE), generate accidental access response RAR message according to this Random Access Preamble, wherein comprise the information that is used to indicate the employed uplink member carrier of described UE transmission upstream data;
Described eNB sends to described UE with described RAR message.
A kind of evolved base station that the embodiment of the invention provides comprises:
The random access lead code receiving element is used to receive the random access lead code Random Access Preamble from user equipment (UE);
The RAR generation unit is used for generating accidental access response RAR message according to described Random Access Preamble, wherein comprises to be used to indicate described UE to send the information of the employed uplink member carrier of upstream data;
The RAR transmitting element is used for described RAR message is sent to described UE.
A kind of communication system that the embodiment of the invention provides comprises: evolved base station eNB and at least one user equipment (UE);
Described eNB, after being used to receive random access lead code Random Access Preamble from UE, generate accidental access response RAR message according to this Random Access Preamble, wherein comprise the information that is used to indicate the employed uplink member carrier of described UE transmission upstream data, and described RAR message is sent to described UE;
Described UE, be used for sending described Random Access Preamble to described eNB, receive described RAR message, therefrom obtain to be used to indicate and self send the information of the employed uplink member carrier of upstream data, and the uplink member carrier that needs use when determining to send upstream data according to this information.
The embodiment of the invention, after eNB receives Random Access Preamble from UE, generate accidental access response RAR message according to this Random Access Preamble, wherein comprise the information that is used to indicate the employed uplink member carrier of UE transmission upstream data; ENB sends to UE with described RAR message, thereby in carrier aggregation system, has realized UE is sent the information indication of the employed uplink member carrier of upstream data, makes UE when sending upstream data, can determine the uplink member carrier of using.
Description of drawings
The schematic flow sheet of a kind of information indicating method that Fig. 1 provides for the embodiment of the invention;
The competition that Fig. 2 provides for the embodiment of the invention is the access process schematic diagram at random;
The non-competing schematic diagram of access process at random that Fig. 3 provides for the embodiment of the invention;
The structural representation of a kind of evolved base station that Fig. 4 provides for the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of information indicating method, system and device, in order in carrier aggregation system, to realize UE is sent the information indication of the employed uplink member carrier of upstream data, make UE when sending upstream data, can determine the uplink member carrier of using.
For multicarrier system, uply support a plurality of member carriers simultaneously, the embodiment of the invention has proposed a kind of at accidental access response (RAR, Random Access Response) comprises the technical scheme of uplink member carrier indication information in the message, make UE receive after the RAR message and can know just which the concrete Physical Resource Block (PRB, Physical Resource Block) on which or which uplink member carrier is used in uplink next time according to the UL grant indication information in the RAR message.
Below in conjunction with accompanying drawing the technical scheme that the embodiment of the invention provides is described.
Referring to Fig. 1, a kind of information indicating method that the embodiment of the invention provides comprises step:
After S101, eNB receive random access lead code (Random Access Preamble) from UE, generate accidental access response (RAR) message according to this Random Access Preamble, wherein comprise the information (can abbreviate the up-link carrier indication information as) that is used to indicate the employed uplink member carrier of UE transmission upstream data.
S102, eNB send to UE with the RAR message that step S101 generates.
Preferably, be used to indicate UE to send the information of the employed uplink member carrier of upstream data, be included in the up permission (UL grant) in the RAR message.
Preferably, be used to indicate UE to send the information of the employed uplink member carrier of upstream data, by uplink member carrier indication territory (the UL CC index) indication that in UL grant, is provided with in advance.
Preferably, when the employed uplink member carrier of UE transmission upstream data only comprised a uplink member carrier, UL CC index only indicated the indication information of a uplink member carrier, and the bit number that UL CC index takies is
Wherein N represents the number of the up-link carrier of polymerization in the carrier aggregation system.
Preferably, when the employed uplink member carrier of UE transmission upstream data comprises a plurality of uplink member carrier, UL CC index indicates the indication information of a plurality of uplink member carrier by the form of table of bits (bitmap), and the bit number that UL CC index takies is the number of the up-link carrier of polymerization in the carrier aggregation system.
Provide concrete explaining below.
In multicarrier system, insert at random for competition, UL grant among the RAR distributes is ascending physical signal resource at the required use of Msg3 uplink, comprise concrete PRB position indication information on which up-link carrier indication information of concrete use and this up-link carrier, certainly this ascending resource can be identical with the employed up-link carrier of transmission random access lead code (Random Access Preamble), just need not to carry the up-link carrier indication information like this in RAR.
Insert at random for non-competing, then need in RAR, carry the indication information of the uplink member carrier of the required use of the follow-up uplink of UE, otherwise UE can't know which uplink member carrier the resource allocation information that UL grant carries is at.
Certainly, insert the uplink member carrier that also can change the required use of Msg3 at random for competition, then up-link carrier indicating mechanism and the non-competing up-link carrier indicating mechanism that inserts at random are similar, and the indication information that only need carry the uplink member carrier of the required use of the follow-up uplink of UE in the UL of RAR grant gets final product.
That is to say that the information indication scheme that the embodiment of the invention provides both had been applicable to non-competing access way at random, also be applicable to and compete access way at random.
The flow process that competition inserts at random mainly comprises four steps as shown in Figure 2:
Msg1:UE sends random access lead code (Random Access Preamble) by uplink random access channel (RACH, random access channel) to eNB.
After Msg2:eNB receives Random Access Preamble, generate accidental access response (RAR, Random Access Response) message, and send to UE by downlink sharied signal channel (DL-SCH), comprise up permission (UL grant) in this message.
Msg3:UE carries out uplink on uplink shared channel (UL-SCH), insert scene at different random and carry different information, set up request message such as send Radio Resource control (RRC) connection for initial access (initial access) scene, send RRC connection reconstruction message for RRC connection reconstruction scene.
Msg4:eNB sends competition to UE and solves message.
The non-competing flow process that inserts at random mainly comprises three steps as shown in Figure 3:
Msg0:eNB is that UE distributes non-competing Physical Random Access Channel (PRACH) resource that inserts special-purpose random access lead code at random and send this random access lead code use.
Msg1:UE sends special-purpose Random AccessPreamble to eNB on the PRACH of appointment resource.
Msg2:eNB sends accidental access response (RAR) message to UE, and this accidental access response message comprises the UL grant of 20bit.
In the embodiment of the invention, can in the UL grant of the RAR in flow process that above-mentioned competition inserts at random and non-competing at random the access process, increase uplink member carrier indication territory (UL CC index), send the uplink member carrier of the required use of upstream data with indication UE.But the 20bit of the RAR of existing LTE system regulation can not satisfy the demands, and therefore needs to increase the bit number of RAR, specifically increases the number how many bit numbers depend on the up link member carrier in the CA system, and the concrete indicating mode of UL CC index.
After the UL grant of the embodiment of the invention in RAR increased uplink member carrier indication territory UL CCindex, the content among the UL grant specifically comprised:
Frequency hopping indication (Hopping flag-1bit), being set to 1 expression Physical Uplink Shared Channel (PUSCH) needs frequency hopping, otherwise does not need frequency hopping;
The resource block assignments of fixed size (Fixed size resource block assignment-10bits);
The modulating-coding mechanism of brachymemma (Truncated modulation and coding scheme-4bits);
Power control commands (TPC command for scheduled PUSCH-3bits) for the PUSCH that dispatches;
Last line delay (UL delay-1 bit): whether expression PUSCH transmission postpones, and is used for non-competing access at random, inserts at random for competition to keep this territory;
Channel quality indication (CQI) request (CQI request-1 bit): be set to 1 expression PUSCH and need carry CQI information, be used for non-competing access at random, keep this territory for competing to insert at random;
Uplink member carrier indication territory (UL CC index): can indicate single uplink member carrier, also can indication carrier wave set (being a plurality of uplink member carrier).
At first introduce the situation that UL CC index only indicates a uplink member carrier below.
If UL CC index only indicates a uplink member carrier, then its bit number can be expressed as
Wherein N represents the number of the up-link carrier of polymerization in the carrier aggregation system.
With N=5 is example, and the numbering of the up-link carrier of polymerization is respectively 0,1,2,3,4 in the carrier aggregation system, and then UL CC index can use 3bit to represent, the implication of every kind of bit combination expression is shown in following table one:
| Bit combination | Implication |
| 000 | Expression PUSCH transmission is used and is numbered 0 uplink member carrier |
| 001 | Expression PUSCH transmission is used and is numbered 1 uplink member carrier |
| 010 | Expression PUSCH transmission is used and is numbered 2 uplink member carrier |
| 011 | Expression PUSCH transmission is used and is numbered 3 uplink member carrier |
| 100 | Expression PUSCH transmission is used and is numbered 4 uplink member carrier |
| 101 | Keep the territory |
| 110 | Keep the territory |
| 111 | Keep the territory |
Table one
In addition, UL CC index also can indicate a plurality of uplink member carrier, and is specific as follows:
If eNB can distribute the resource of a plurality of uplink member carrier to give UE, then UL CC index can use the mode of bitmap, indicate the indication information of a plurality of uplink member carrier, the bit number that uses under the bitmap mode equals the number N of the up-link carrier of polymerization in the carrier aggregation system.
With N=5 is example, and the numbering of the up-link carrier of polymerization is respectively 0,1,2,3,4 in the carrier aggregation system, and then UL CC index can use 5bit to represent, the respectively corresponding uplink member carrier of this 5bit information.
Need to prove, during uplink member carrier of UL CC index indication, also can use the mode of bitmap to indicate the indication information of a uplink member carrier.
Preferably, resource allocation is arranged, then can then be set to 1, otherwise be set to 0 at this uplink member carrier corresponding bit in UL CC index if UL grant indicates on a certain uplink member carrier.
For example: UL CC index is expressed as 00101, then its implication can for the resource allocation correspondence among the RAR be uplink member carrier 2 and uplink member carrier 4, promptly UE can send upstream data on uplink member carrier 2 and uplink member carrier 4.Certainly, also can for the resource allocation correspondence among the RAR be uplink member carrier 0 and uplink member carrier 2, promptly UE can send upstream data on uplink member carrier 0 and uplink member carrier 2.Specifically how to understand, depend on the negotiation that UE and eNB are prior.
A kind of communication system that the embodiment of the invention provides comprises: evolved base station eNB and at least one user equipment (UE).
ENB, after being used to receive random access lead code Random Access Preamble from UE, generate accidental access response RAR message according to this Random Access Preamble, wherein comprise the information that is used to indicate the employed uplink member carrier of UE transmission upstream data, and RAR message is sent to UE.
UE, be used for sending Random Access Preamble to eNB, receive RAR message, therefrom obtain to be used to indicate and self send the information of the employed uplink member carrier of upstream data, and the uplink member carrier that needs use when determining to send upstream data according to this information.
Preferably, referring to Fig. 4, a kind of evolved base station eNB that the embodiment of the invention provides comprises:
Random access lead code receiving element 11 is used to receive the random access lead code RandomAccess Preamble from UE.
RAR generation unit 12 is used for generating accidental access response RAR message according to Random Access Preamble, wherein comprises to be used to indicate UE to send the information of the employed uplink member carrier of upstream data.
Preferably, described RAR generation unit 12, the information setting that will be used for indicating UE to send the employed uplink member carrier of upstream data is in the up permission UL grant of RAR message.
Preferably, described RAR generation unit 12 is used to indicate UE to send the information of the employed uplink member carrier of upstream data by the uplink member carrier indication territory UL CC index indication that is provided with in UL grant in advance.
Preferably, described RAR generation unit 12, when definite UE sends the employed uplink member carrier of upstream data and only comprises a uplink member carrier, only indicate the indication information of a uplink member carrier by UL CC index, wherein the bit number that takies of UL CC index is
N represents the number of the up-link carrier of polymerization in the 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 UL CC index, wherein the bit number that takies of UL CC index is the number of the up-link carrier of polymerization in the carrier aggregation system.
In sum, the embodiment of the invention is for multicarrier system, the up situation of supporting a plurality of member carriers simultaneously, a kind of scheme that increases the uplink member carrier indication information in the UL grant that accidental access response RAR comprises has been proposed, after making that UE receives RAR, just can know which running time-frequency resource on which uplink member carrier is used in uplink next time, has guaranteed correctly carrying out of uplink.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (11)
1. an information indicating method is characterized in that, this method comprises:
After evolved base station eNB receives random access lead code RandomAccess Preamble from user equipment (UE), generate accidental access response RAR message according to this Random Access Preamble, wherein comprise the information that is used to indicate the employed uplink member carrier of described UE transmission upstream data;
Described eNB sends to described UE with described RAR message.
2. method according to claim 1 is characterized in that, described information is included among the up permission UL grant in the described RAR message.
3. method according to claim 2 is characterized in that, the uplink member carrier indication territory UL CC index indication of described information by being provided with in described UL grant in advance.
4. method according to claim 3, it is characterized in that, when the employed uplink member carrier of described UE transmission upstream data only comprised a uplink member carrier, described UL CC index only indicated the indication information of a uplink member carrier, and the bit number that described UL CC index takies is
Wherein N represents the number of the up-link carrier of polymerization in the carrier aggregation system.
5. method according to claim 3, it is characterized in that, described UL CC index is by the indication information of the form indication uplink member carrier of table of bits bitmap, and the bit number that described UL CC index takies is the number of the up-link carrier of polymerization in the carrier aggregation system.
6. an evolved base station is characterized in that, described base station comprises:
The random access lead code receiving element is used to receive the random access lead code Random Access Preamble from user equipment (UE);
The RAR generation unit is used for generating accidental access response RAR message according to described Random Access Preamble, wherein comprises to be used to indicate described UE to send the information of the employed uplink member carrier of upstream data;
The RAR transmitting element is used for described RAR message is sent to described UE.
7. base station according to claim 6 is characterized in that, described RAR generation unit is in the up permission UL grant of described information setting in described RAR message.
8. base station according to claim 7 is characterized in that, described RAR generation unit is indicated described information by the uplink member carrier indication territory UL CC index that is provided with in advance in described UL grant.
9. base station according to claim 8, it is characterized in that, described RAR generation unit, when determining that the employed uplink member carrier of described UE transmission upstream data only comprises a uplink member carrier, only indicate the indication information of a uplink member carrier by described UL CC index, the bit number that wherein said UL CCindex takies is
N represents the number of the up-link carrier of polymerization in the carrier aggregation system.
10. base station according to claim 8, it is characterized in that, described RAR generation unit, use the form of table of bits bitmap to indicate the indication information of uplink member carrier by described UL CC index, the bit number that wherein said UL CC index takies is the number of the up-link carrier of polymerization in the carrier aggregation system.
11. a communication system is characterized in that, this system comprises: evolved base station eNB and at least one user equipment (UE);
Described eNB, after being used to receive random access lead code Random Access Preamble from UE, generate accidental access response RAR message according to this Random Access Preamble, wherein comprise the information that is used to indicate the employed uplink member carrier of described UE transmission upstream data, and described RAR message is sent to described UE;
Described UE, be used for sending described Random Access Preamble to described eNB, receive described RAR message, therefrom obtain to be used to indicate and self send the information of the employed uplink member carrier of upstream data, and the uplink member carrier that needs use when determining to send upstream data according to this information.
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