CN101426275A - Method and system for confirming transmission parameter in random access process - Google Patents
Method and system for confirming transmission parameter in random access process Download PDFInfo
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Abstract
The present invention discloses a method for confirming transmission parameter in a random access process, wherein the method comprises the following procedures: confirming transmission parameters of ACK/NAK signal corresponding with the uplink scheduling transmission by a network side; transmitting the random access response comprising the transmission parameter indication information of ACK/NAK signal to the terminal; and obtaining the transmission parameter of ACK/NAK signal corresponding with the uplink scheduling transmission. The invention also discloses a system for confirming transmission parameter in the random access process. The method according to the invention can confirm the transmission parameter of ACK/NAK signal corresponding with the uplink scheduling transmission, and transmits the transmission parameter of ACK/NAK signal and uplink transmission parameter of uplink scheduling transmission, which are included in the random access response to the terminal. Thereby the terminal can normally receive the corresponding ACK/NAK signal in the uplink HARQ transmission process of subsequent uplink scheduling transmission according to the information in the random access response after the random access response is received by the terminal.
Description
Technical field
The present invention relates to mobile communication technology, be specifically related to determine in a kind of random access procedure the method and system of transmission parameter.
Background technology
The 3-G (Generation Three mobile communication system) technology is increasingly mature, compares the present communication technology, has stronger technical advantage, so application prospect is very wide.In order to make the 3G (Third Generation) Moblie technology can continue to carry out technology innovation, guarantee in the longer time, to have suitable competitiveness, thereby the commerce that prolongs the 3G (Third Generation) Moblie technology is used the cycle, 3GPP is studying a kind of brand-new long-term evolving network, and (LongTerm Evolution, LTE) system is to satisfy the application demand of mobile communication in the longer time.
In present LTE system, the flow chart of Jie Ruing comprises as shown in Figure 1 at random:
Step 101: terminal sends random access leader sequence (hereinafter referred Msg1) at up direction.(Physical Random Access Channel PRACH) goes up transmission to Msg1, and according to the difference of radius of society, PRACH can be configured in the uplink pilot time slot, also can be configured in the conventional sub-frame of uplink at Physical Random Access Channel.
Step 102: after network side receives Msg1, send accidental access response (hereinafter referred Msg2) by the downlink physical shared channel at down direction.Msg2 is used for Msg1 is confirmed, feedback timing adjustment information, and the various uplink parameters of notice terminal when carrying out uplink.May be incorporated in together at the Msg2 of a plurality of terminals and to send.
Step 103: after terminal receives one's own Msg2, carry out uplink scheduling transmission (hereinafter referred Msg3) according to specified running time-frequency resource position of the indication information of Msg2 and transformat etc.Comprise some high-level signalings among the Msg3, such as: Radio Resource control (Radio Resource Control, RRC) connect the request of foundation and terminal at Non-Access Stratum (Non-Access Stratum, information such as unique identification NAS), Msg3 adopts the automatic repeat requests of mixing, and (Hybrid AutomaticRetransmission Request, HARQ) mode is transmitted.
In the existing standard of LTE system, when carrying out the ascending HARQ transmission, at first network side sends a uplink scheduling signaling on the physics shared control channel, the indication information that comprises the required uplink parameter of follow-up uplink in this signaling, after terminal receives described uplink scheduling signaling, on the resource of appointment, carry out uplink according to described indication information.Do not receive if network side is correct, then send the NAK signal, carry out HARQ after terminal receives and retransmit to terminal; If network side correctly receives, then send ack signal to terminal, stop HARQ after terminal receives and retransmit.
A kind of flow process of possible ascending HARQ transmission as shown in Figure 2, comprising:
Step 201: network side sends the uplink scheduling signaling on the physics shared control channel.
Step 202: after terminal receives this uplink scheduling signaling, on the resource of appointment, carry out uplink according to the indication information in the signaling.
Step 203: network side is incorrect to be received, and returns the NAK signal to terminal.
Step 204: terminal receives the NAK signal, sends HARQ retransmission packet for the first time to network side.
Step 205: network side is incorrect to be received, and returns the NAK signal to terminal.
Step 206: terminal receives the NAK signal, sends HARQ retransmission packet for the second time to network side.
Step 207: network side correctly receives, and sends ack signal to terminal, stops HARQ after terminal receives and retransmits.
Shown in the last example for terminal through three transmission (comprising that initial transmission and twice HARQ retransmit) after, upstream data is successfully sent to network side, in the row transmission, may once send success actually, also may twice or more times send successfully.
In said process, terminal will receive the ACK/NAK signal that network side sends and respond, can determine to proceed to retransmit and still stop to retransmit, therefore terminal is except the uplink scheduling signaling that the response to network side sends, also need to obtain the transmission parameter of the ACK/NAK signal of uplink correspondence, comprising: running time-frequency resource, code source, channel label, frequency hopping mode and modulation system etc.
According in the present standard about the progress of LTE, in common ascending HARQ transmission course, there are implicit mapping relations between the transmission parameter of ACK/NAK signal and the logical place of uplink scheduling signaling in the physics shared control channel, terminal receives the uplink scheduling signaling on the physics shared control channel, just can obtain to carry out the transmission parameter of the corresponding ACK/NAK signal of ascending HARQ transmission by mapping relations.
Random access procedure of the prior art, because Msg3 is the HARQ transmission the up direction employing, therefore the same with common ascending HARQ transmission shown in Figure 2, terminal need be obtained the transmission parameter of the ACK/NAK signal of Msg3 correspondence, could normally receive the ACK/NAK signal that network side sends.
Yet, under prior LTE system, the required uplink parameter of Msg3 is not to be provided by the uplink scheduling signaling on the physics shared control channel in the random access procedure, but provide by the Msg2 on the downlink physical shared channel, therefore after terminal receives Msg2, can't obtain the transmission parameter of the corresponding ACK/NAK signal of Msg3 by mapping relations common and the dispatch logical place, in follow-up ascending HARQ transmission course, can't normally receive the ACK/NAK signal of Msg3 correspondence like this.
As seen from the above, prior art can't be determined the transmission parameter of ACK/NAK signal in random access procedure, so terminal can't normally receive the ACK/NAK signal of Msg3 correspondence in follow-up ascending HARQ transmission course.
Summary of the invention
The embodiment of the invention provides the method and system of determining transmission parameter in a kind of random access procedure, can determine the transmission parameter of ACK/NAK signal in the random access procedure.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
Determine the method for transmission parameter in a kind of random access procedure, this method comprises:
Network side is determined the transmission parameter of the ACK/NAK signal that the uplink scheduling transmission is corresponding;
The accidental access response that will comprise the transmission parameter indication information of ACK/NAK signal sends to terminal;
Terminal is obtained the transmission parameter of the corresponding ACK/NAK signal of uplink scheduling transmission according to described indication information.
Determine the system of transmission parameter in a kind of random access procedure, this system comprises:
Network side is used for determining that uplink scheduling transmits the transmission parameter of corresponding ACK/NAK signal, and the accidental access response that will comprise the transmission parameter of ACK/NAK signal sends to terminal;
Terminal is used to receive the accidental access response that network side sends, and obtains the transmission parameter of the corresponding ACK/NAK signal of uplink scheduling transmission according to described accidental access response.
As seen from the above technical solutions, definite method and system of transmission parameter in this random access procedure of the present invention, can be when network side be Msg3 distribution ascending resource, determine the transmission parameter of the ACK/NAK signal of Msg3 correspondence, and the indication information of the transmission parameter of ACK/NAK signal is included in is handed down to terminal among the Msg2, thereby make terminal after receiving Msg2, can be according to indication information normal ACK/NAK signal that receives correspondence in the ascending HARQ transmission course of follow-up Msg3 wherein.
Description of drawings
The schematic flow sheet that Fig. 1 inserts at random for existing LTE system.
Fig. 2 is the schematic diagram of ascending HARQ transmission in the existing LTE system.
Fig. 3 is a schematic diagram of determining the method for transmission parameter in the embodiment of the invention.
Fig. 4 is the schematic diagram of running time-frequency resource of the ACK/NAK signal configures of Msg3 correspondence for network side in the embodiment of the invention one.
Fig. 5 is the schematic diagram of running time-frequency resource of the ACK/NAK signal static configuration of Msg3 correspondence for network side in the embodiment of the invention two.
Fig. 6 is the composition schematic diagram of physics shared control channel in the embodiment of the invention two.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
The schematic diagram of the method for definite transmission parameter that the embodiment of the invention proposes as shown in Figure 3, comprising:
Step 301: identical with step 101.
Step 302: after network side received Msg1, network side was that Msg3 distributes ascending resource.At this moment, except the uplink parameter of distributing Msg3, also determine the transmission parameter of the ACK/NAK signal of Msg3 correspondence simultaneously, running time-frequency resource, code source, channel label, frequency hopping mode and the modulation system etc. used when transmitting comprising ACK/NAK, the indication information with the transmission parameter of ACK/NAK signal is handed down to terminal by Msg2 then.
Step 303: after terminal receives Msg2, both obtained the uplink parameter that Msg3 needs, and also obtained the transmission parameter of the ACK/NAK signal of Msg3 correspondence, terminal can be carried out the ascending HARQ transmission of follow-up Msg3.
Below in conjunction with specific embodiment, be that the ACK/NAK signal of Msg3 correspondence determines that the method for transmission parameter is illustrated to described network side.
Embodiment one
For each random access procedure, network side dynamic assignment part resource is used to transmit the ACK/NAK signal of Msg3 correspondence.At this moment, the indication information of the transmission parameter of ACK/NAK signal is the transmission parameter of the ACK/NAK signal of actual use among the Msg2.For example, Fig. 4 shows in random access procedure, and network side is the schematic diagram of running time-frequency resource of the ACK/NAK signal configures of Msg3 correspondence.
At this moment, the running time-frequency resource of the ACK/NAK signal of the 1st of Msg3 the transmission correspondence is configured to: f1 position on the t1 moment/frequency domain on the time domain; The 2nd the corresponding ACK/NAK signal configures of transmission of Msg3 is: f1 position on the t2 moment/frequency domain on the time domain; The 3rd the corresponding ACK/NAK signal configures of transmission of Msg3 is: f1 position on the t3 moment/frequency domain on the time domain.Therefore, in Msg2, the transmission parameter of the pairing ACK/NAK signal of Msg3 can be expressed as:
Time-domain position: t1/t2/t3; Frequency domain position: f1.
Adopt aforesaid way, then when terminal receive the ACK/NAK signal that Msg2 issues transmission parameter indication information and when using Msg3 to carry out the ascending HARQ transmission, just can determine and utilize the transmission parameter of the ACK/NAK signal of correspondence.
Embodiment two
Network side static configuration part private resource, be specifically designed to the transmission of the ACK/NAK signal of Msg3 correspondence in the system, this part private resource is divided into some independently elementary cells, distinguish by the combination of different time-domain resource, frequency domain resource, sign indicating number territory resource, channel label, frequency hopping mode or modulation system between each elementary cell, notify terminal by the mode of system broadcasts or standard code each elementary cell in the described private resource.
For example, Fig. 5 shows in random access procedure, and network side is the schematic diagram of running time-frequency resource of the ACK/NAK signal static configuration of Msg3 correspondence.
At this moment, network side distributes three groups of independently elementary cells, wherein:
Elementary cell 1 (unit of the oblique line mark that tilts to the lower left from the upper right side) is expressed as: time-domain position: t1/t2/t3; Frequency domain position: f1.
Elementary cell 2 (unit of vertical curve mark) is expressed as: time-domain position: t1/t2/t3; Frequency domain position: f2.
Elementary cell 3 (unit of the oblique line mark that tilts to the lower right from the upper left side) is expressed as: time-domain position: t1/t2/t3; Frequency domain position: f3.
Wherein, when using elementary cell 1, the running time-frequency resource of the ACK/NAK signal that the 1st transmission of Msg3 is corresponding is configured to t1, and frequency domain resource is f1; The running time-frequency resource of the ACK/NAK signal that the 2nd transmission of Msg3 is corresponding is configured to t2, and frequency domain resource is f1; The running time-frequency resource of the ACK/NAK signal that the 3rd transmission of Msg3 is corresponding is configured to t3, and frequency domain resource is f1.
Use elementary cell 2 or at 3 o'clock, can analogize according to above-mentioned situation.
Suppose in certain random access procedure, network side distributes elementary cell 2 to be used for the transmission of the pairing ACK/NAK signal of Msg3, then only need comprise follow-up use elementary cell 2 in Msg2 carries out the indication information of ACK/NAK signal transmission and gets final product, after terminal obtains this indication information, just can determine and utilize the transmission parameter of corresponding ACK/NAK signal, and needn't as embodiment one, need the transmission parameter of the concrete ACK/NAK signal of network side indication.
Certainly, can adopt the method identical with embodiment one this moment too, directly indicates the transmission parameter of concrete ACK/NAK signal in Msg2.
Preferably, network side can also be handed down to terminal with the transmission parameter of ACK/NAK signal by implicit mapping relations, this moment, network side was set up the mapping relations of the uplink parameter of each elementary cell and Msg3 in advance, and the mode of passing through system broadcasts or standard code is notified terminal with each elementary cell and mapping relations, the uplink parameter that only need issue Msg3 in Msg2 gets final product, the uplink parameter of the Msg3 of this moment also is simultaneously the indication information of ACK/NAK signal transmission, need not the special transmission parameter of the ACK/NAK signal that uses or the numbering of elementary cell of indicating, after terminal receives Msg2, can be according to the uplink parameter of wherein Msg3 and the mapping relations that obtain in advance definite and utilize the transmission parameter of the ACK/NAK signal of follow-up correspondence.
The execution mode that the transmission parameter of ACK/NAK signal is handed down to terminal is specifically described by implicit mapping relations above-mentioned below:
The physics shared control channel can occur in a plurality of downlink frame, and the physics shared control channel in each downlink frame is by one group of control channel unit (Control Channel Element, CCE) formation.Article one, dispatch (upstream or downstream) can take a CCE or a plurality of continuous CCE, for this dispatch, always exists the lowest number of CCE.
In random access procedure, the employed ascending resource of Msg3 is transferred to terminal by Msg2, wherein do not use the uplink scheduling signaling, but logically can introduce the notion of virtual uplink scheduling signaling for it, suppose that promptly the ascending resource of Msg3 dispatched by a uplink scheduling signaling in certain downlink frame, this signaling promptly is called virtual uplink scheduling signaling, and its logical place is made of two contents: the downlink frame numbering at this signaling place and the lowest number of its CCE that takies.Therefore this virtual uplink scheduling signaling can with the transmission parameter of corresponding ACK/NAK signal between set up mapping relations.
Network side carries the logical place parameter of the virtual scheduling signaling of Msg3 in Msg2, as the part of the uplink parameter of Msg3.Terminal can be utilized the logical place parameter of this virtual scheduling signaling like this, obtains the transmission parameter of the corresponding ACK/NAK signal of ascending HARQ transmission in conjunction with mapping relations.
Fig. 6 shows the composition schematic diagram of a physics shared control channel.Wherein, in downlink frame #2, the physics shared control channel is made of 8 CCE, and dispatch 2a takies 4 CCE:CCE#1, CCE#2, CCE#3 and CCE#4, dispatch 2b takies 2 CCE:CCE#5 and CCE#6, and dispatch 2c takies 2 CCE:CCE#7 and CCE#8.
In the present embodiment, have mapping relations between the lowest number of the CCE that takies of the transmission parameter of ACK/NAK signal and uplink scheduling signaling.Suppose network side pre-configured 8 groups of ACK/NAK transmission parameters in downlink frame #2, if dispatch 2b is the used uplink scheduling signaling of ascending HARQ transmission, the lowest number of its shared CCE on the physics shared control channel is 5, so the corresponding ACK/NAK signal of ascending HARQ transmission just uses the 5th group of transmission parameter.
In addition, network side can also be handed down to terminal with the transmission parameter of ACK/NAK signal by mapping relations, this moment, network side was set up the mapping relations of the uplink parameter of each elementary cell and Msg3 in advance, and the mode of passing through system broadcasts or standard code is notified terminal with each elementary cell, in Msg2, just need not the transmission parameter of the concrete ACK/NAK signal that uses of special indication or the numbering of elementary cell, the mapping relations that comprise elementary cell and ACK/NAK signal in the indication information of ACK/NAK signal transmission, after terminal receives this indication information, just can determine and utilize the transmission parameter of the ACK/NAK signal of follow-up correspondence according to the mapping relations that wherein comprise.
Adopt embodiment two described modes, when terminal receives the indication information that Msg2 issues and uses Msg3 to carry out the ascending HARQ transmission, just can determine and utilize the transmission parameter of the ACK/NAK signal of correspondence.
Determine the system of transmission parameter in the embodiment of the invention in a kind of random access procedure, comprising:
Network side is used for determining that uplink scheduling transmits the transmission parameter of corresponding ACK/NAK signal, and the accidental access response that will comprise the transmission parameter of ACK/NAK signal sends to terminal;
Terminal is used to receive the accidental access response that network side sends, and obtains the transmission parameter of the corresponding ACK/NAK signal of uplink scheduling transmission according to described accidental access response.
Should be noted that, only be illustrated in the various embodiments described above with regard to the time-frequency method of salary distribution in the indication information, but in the transmission parameter of actual ACK/NAK signal, can further include the identification information of a yard territory resource, channel label, frequency hopping mode or modulation system etc., the concrete application mode and the time-frequency method of salary distribution are similar, so will not give unnecessary details.
Need to prove, random access procedure in the LTE system (comprising random access procedure and uncompetitive random access procedure based on competition) serves many purposes, connect the required access or the like at random of up-downgoing transmission of setting up under required initial access, handoff procedure or the specified conditions such as RRC, therefore, the embodiment of the invention is equally applicable to above-mentioned various situation.
Simultaneously, for convenience of explanation, adopted the LTE system to give an example in the embodiment of the invention, in actual applications, the present invention is applicable to other any wireless communication systems that shared resource is carried out fast dispatch too.
Therefore; understand easily, the above is preferred embodiment of the present invention only, is not to be used to limit spirit of the present invention and protection range; equivalent variations that any those of ordinary skill in the art made or replacement all should be considered as being encompassed within protection scope of the present invention.
Claims (9)
1, determine the method for transmission parameter in a kind of random access procedure, it is characterized in that this method comprises:
Network side is determined the transmission parameter of the ACK/NAK signal that the uplink scheduling transmission is corresponding;
The accidental access response that will comprise the transmission parameter indication information of ACK/NAK signal sends to terminal;
Terminal is obtained the transmission parameter of the corresponding ACK/NAK signal of uplink scheduling transmission according to described indication information.
2, method according to claim 1 is characterized in that, described network side determines that the method for the transmission parameter of the ACK/NAK signal that the uplink scheduling transmission is corresponding is:
Static configuration private resource or be each random access procedure dynamic assignment resource is as the transmission parameter of the corresponding ACK/NAK signal of uplink scheduling transmission.
3, method according to claim 2, it is characterized in that, when network side static configuration private resource or when being each random access procedure dynamic assignment resource, the transmission parameter of the transmission parameter indication information of described ACK/NAK signal for using in this time random access procedure.
4, method according to claim 2 is characterized in that, when network side static configuration private resource, network side determines that the method for the transmission parameter of the ACK/NAK signal that the uplink scheduling transmission is corresponding is:
Described private resource is divided into separate elementary cell, described each elementary cell is prenoticed terminal by the mode of system broadcasts or standard code, and with the transmission parameter of described elementary cell as the ACK/NAK signal;
Described transmission parameter indication information is the numbering of elementary cell, and terminal according to the method that described accidental access response obtains the transmission parameter of the corresponding ACK/NAK signal of uplink scheduling transmission is:
Terminal obtains corresponding elementary cell according to the numbering of elementary cell in the accidental access response that obtains, with the transmission parameter of described elementary cell as the corresponding ACK/NAK signal of uplink scheduling transmission.
5, method according to claim 2 is characterized in that, when network side static configuration private resource, network side determines that the method for the transmission parameter of the ACK/NAK signal that the uplink scheduling transmission is corresponding is:
Described private resource is divided into separate elementary cell, set up described each elementary cell and uplink scheduling the transmission the uplink parameter between mapping relations, described mapping relations and each elementary cell are prenoticed terminal by the mode of system broadcasts or standard code, and with the transmission parameter of described elementary cell as the ACK/NAK signal;
Described transmission parameter indication information is the uplink parameter of uplink scheduling transmission, and terminal according to the method that described accidental access response obtains the transmission parameter of the corresponding ACK/NAK signal of uplink scheduling transmission is:
Terminal is according to the uplink parameter of the transmission of the uplink scheduling in the accidental access response that obtains, and obtain corresponding elementary cell in conjunction with the mapping relations between the uplink parameter of each elementary cell and uplink scheduling transmission, with the transmission parameter of described elementary cell as the ACK/NAK signal of uplink scheduling transmission correspondence.
6, method according to claim 5 is characterized in that, comprises in the uplink parameter of described uplink scheduling transmission:
The lowest number information of the downlink frame number information at uplink scheduling signaling place and its control channel unit that takies.
7, method according to claim 2 is characterized in that, when network side static configuration private resource, network side determines that the method for the transmission parameter of the ACK/NAK signal that the uplink scheduling transmission is corresponding is:
Described private resource is divided into separate elementary cell, set up described each elementary cell and uplink scheduling the transmission the uplink parameter between mapping relations, described each elementary cell is prenoticed terminal by the mode of system broadcasts or standard code, and with the transmission parameter of described elementary cell as the ACK/NAK signal;
Described transmission parameter indication information is the mapping relations between the uplink parameter of elementary cell and uplink scheduling transmission, and terminal according to the method that described accidental access response obtains the transmission parameter of the corresponding ACK/NAK signal of uplink scheduling transmission is:
Terminal is according to the uplink parameter of the transmission of the uplink scheduling in the accidental access response that obtains, and the mapping relations between the uplink parameter of each elementary cell and uplink scheduling transmission in the accidental access response obtain corresponding elementary cell, with the transmission parameter of described elementary cell as the ACK/NAK signal of uplink scheduling transmission correspondence.
8, according to claim 3,4,6 or 7 described methods, it is characterized in that, comprise in the indication information of the transmission parameter of described ACK/NAK signal:
The identification information of employed running time-frequency resource, code source, channel label, frequency hopping mode and modulation system during the transmission of ACK/NAK signal.
9, determine the system of transmission parameter in a kind of random access procedure, it is characterized in that this system comprises:
Network side is used for determining that uplink scheduling transmits the transmission parameter of corresponding ACK/NAK signal, and the accidental access response that will comprise the transmission parameter of ACK/NAK signal sends to terminal;
Terminal is used to receive the accidental access response that network side sends, and obtains the transmission parameter of the corresponding ACK/NAK signal of uplink scheduling transmission according to described accidental access response.
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