CN101562897B - Method for determining a random access leading sequence response transmit window as well as device and system thereof - Google Patents
Method for determining a random access leading sequence response transmit window as well as device and system thereof Download PDFInfo
- Publication number
- CN101562897B CN101562897B CN2008101044675A CN200810104467A CN101562897B CN 101562897 B CN101562897 B CN 101562897B CN 2008101044675 A CN2008101044675 A CN 2008101044675A CN 200810104467 A CN200810104467 A CN 200810104467A CN 101562897 B CN101562897 B CN 101562897B
- Authority
- CN
- China
- Prior art keywords
- subframe
- special subframe
- rule
- msg2
- starting point
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000004044 response Effects 0.000 title claims description 13
- 101100274486 Mus musculus Cited2 gene Proteins 0.000 claims description 123
- 101150096622 Smr2 gene Proteins 0.000 claims description 123
- 238000004891 communication Methods 0.000 claims description 21
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 claims description 5
- 230000001174 ascending effect Effects 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 5
- 230000007704 transition Effects 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 31
- 238000010586 diagram Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 6
- 101100533725 Mus musculus Smr3a gene Proteins 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000011664 signaling Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002860 competitive effect Effects 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000036967 uncompetitive effect Effects 0.000 description 1
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a method for determining an Msg 2 transmit window. The method comprises the following steps: determining origin of the Msg 2 transmit window: determining a first subframe afterM previous subframes from the last subframe occupied by PRACH resources excluding all uplink subframes and special subframes conforming to preset rules as the origin of the Msg 2 transmit window; det ermining the size of the transmit window: determining the number N of previous subframes excluding the number of all uplink subframes and special subframes conforming to the preset rules from the window origin as the size of the transmit window. The method helps embody characteristics of a TDD system, perfectly shield a plurality of configurations of the TDD system such as transition points, special time slot use and the like and possible system design complexity, and perfectly maintain indication format and performance which are the same as indication format and performance of FDD. The invention further provides a device for determining a Msg 2 transmit window as well as a system thereof corresponding to the method.
Description
Technical field
(Long Time Evolution, LTE) technical field relate in particular to a kind of method, Apparatus and system of definite random access leader sequence response send window to the present invention relates to the Long Term Evolution of mobile communication.
Background technology
The LTE system supports two kinds of frame structures.First kind frame structure is applicable to Frequency Division Duplexing (FDD), and (such frame structure is referring to Fig. 1 for FrequencyDivision Duplex, FDD) system, such radio frames frame length is 10ms, is made up of 20 time slots, and each slot length is 0.5ms, as shown in the figure, each time slot is labeled as 0 to 19.Two continuous time slot are defined as a subframe, and subframe i is by time slot 2i and (2i+1) forming, wherein, i=0,1...9, for the FDD system, every 10ms is in the time because up-downgoing separate at frequency domain, so about the provisional capital have 10 subframes to use.The second class frame structure is only applicable to time division duplex (TimeDivision Duplex; TDD) system; such frame structure is referring to Fig. 2; such radio frames frame length also is 10ms; each frame is split into the field of 2 5ms; the subframe that it is 1ms that each field comprises 5 length (the subframe label is 0～4,5～9); subframe 0 and subframe 5 always are used for downlink transfer; wherein; subframe 1,63 special areas is separately formed, and they are respectively descending pilot frequency (DwPTS), protection (GP) and ascending pilot frequency (UpPTS) at interval.Subframe 1,6 is called as " special subframe ".In special subframe, DwPTS exists all the time, and GP and UpPTS can exist also and can not exist.When not having GP and UpPTS in the special subframe, the length of DwPTS is 1ms, i.e. 12 or 14 OFDM symbols (depending on CP length); When having GP and UpPTS in the special subframe, DwPTS/GP/UpPTS three's total length is 1ms, and multiple different length configuration combination is arranged under this restriction.As seen, special subframe comprises polytype.
There are two kinds of access process at random in the LTE system, i.e. " competitive at random insert " flow process and " uncompetitive insert at random " flow process, no matter adopt which kind of access process at random, subscriber equipment (User Equipment, UE) all will be to evolved base station (eNB) by Physical Random Access Channel (Physical Random AccessChannel, PRACH) send the request message of access at random that comprises random access leader sequence (Msg1), correspondingly, eNB comprises the accidental access response message of random access leader sequence response (Msg2) to the UE feedback.
Under fdd mode, a PRACH resource can take a subframe or a plurality of continuous subframe, and for TDD, a PRACH resource can take a subframe or a plurality of continuous subframe, also can only take the length of UpPTS.Msg2 is the response to Msg1, and Msg2 is a downlink transfer, takies a descending sub frame, sends in the time window of Msg2 after the PRACH resource of Msg1 place.
Referring to Fig. 3, be the sequential chart of PRACH in the FDD system, wherein with the Msg2 send window of correspondence, for the PRACH# 1 in the subframe 1, the send window of corresponding Msg2 is a subframe 4～9, and for the PRACH# 2 in the subframe 6, the send window of corresponding Msg2 is a subframe 9～14.This shows that the send window of Msg2 is always at certain specific PRACH resource, the Msg2 send window of different PRACH resources may be different.
In the FDD system, though the Msg2 send window of different PRACH resource correspondences is had nothing in common with each other, but the parameter of these Msg2 send windows (rule) then is identical, for example shown in Figure 3, no matter be PRACH# 1 or PRACH# 2, the starting point of the send window of the Msg2 that it is corresponding all is interval 2 subframes (i.e. the 3rd subframe) after last subframe of PRACH resource occupation, and the size of the send window of Msg2 all is 6 subframes.
Determine that the Msg2 send window comprises two steps, the first step is to determine the window starting point, and second step was to determine window size.
Obviously, for the FDD system, the parameter of Msg2 send window comprises following two parts:
1. window origin parameters
For certain PRACH resource, the implication of window starting point is: can be used for the subframe the earliest of corresponding Msg2 transmission, and at interval number of subframes (for example, be provided with adjacent sub-frame be spaced apart 1) between last subframe of this PRACH resource occupation.For example, when window starting point value was 3ms, expression can be used for the subframe the earliest of corresponding Msg2 transmission, and was spaced apart 3 subframes (as shown in Figure 3) after last subframe of this PRACH resource occupation.
2. window size parameter
For certain PRACH resource, the implication of window size is: count from the subframe at above-mentioned window starting point place, can be used for the number of the continuous subframes of corresponding Msg2 transmission.For example when the value of window size parameter was 6ms, expression was counted from the subframe at above-mentioned window starting point place, can have 6 continuous subframes to be used for corresponding Msg2 transmission.
As seen, in present LTE system, the send window of Msg2 is in the time window after Msg1.For FDD, on downstream bands, all subframes all are descending sub frames, as long as therefore provide window starting point and the length of window of Msg2, then the implication of Msg2 send window is clear and definite.Yet for the TDD system, because the restriction of frame structure, all sub-frame of uplink and some special subframe can't be used for the transmission of Msg2, so the window indicating means of FDD system can't directly use.Do not provide the indicating means of Msg2 send window under the tdd mode at present in the scheme as yet, if this indicating mode is indeterminate, system can't operate as normal.
Summary of the invention
In view of this, the present invention is directed to method, Apparatus and system that LTE TDD system provides a kind of definite Msg2 send window, to solve the problem that existing scheme is not suitable for LTE TDD system.
For this reason, the embodiment of the invention adopts following technical scheme:
A kind of method of definite Msg2 send window comprises:
Determine Msg2 send window starting point:
From last subframe of PRACH resource occupation, at interval after M the subframe of precognition, with all sub-frame of uplink and first subframe after meeting the special subframe eliminating of presetting rule be defined as Msg2 send window starting point;
Determine the send window size:
From described window starting point, the number of sub-frames N of the precognition after all sub-frame of uplink and the special subframe that meets described presetting rule got rid of is defined as the send window size.
Stating the special subframe that meets presetting rule is meant and contains GP or/and the special subframe of UpPTS.
The described special subframe that meets presetting rule is meant the special subframe of the length of descending pilot frequency DwPTS less than the K that presets an OFDM symbol lengths sum.
Described OFDM symbol numbers K stipulates that in communication protocol perhaps, described OFDM symbol numbers K determines that by network side the back configuration is to evolved base station eNB and user equipment (UE).
Described rule is stipulated in communication protocol, perhaps, determines that by network side the back configuration is to eNB and UE.
A kind of device of definite random access leader sequence response Msg2 send window is present in the eNB side, comprises the PRACH determining unit, is used for determining last subframe of PRACH resource occupation, also comprises:
Window starting point setup unit is used for last subframe from the PRACH resource occupation, at interval after M the subframe of precognition, with all sub-frame of uplink and first subframe after meeting the special subframe eliminating of presetting rule be set at Msg2 send window starting point;
The window size setup unit is used for from described window starting point, and the number of sub-frames N of the precognition after all sub-frame of uplink and the special subframe that meets described presetting rule are got rid of is set at the send window size.
Also comprise:
Special subframe rule setup unit is used for rule being set or/and the details parameter of described rule forbids sending Msg2 on legal special subframe at special subframe.
The special subframe that meets presetting rule that described special subframe rule setup unit is realized comprises: contain GP or/and the special subframe of UpPTS, perhaps, the length of DwPTS is less than the special subframe of the K that presets an OFDM symbol lengths sum.
A kind of device of knowing random access leader sequence response Msg2 send window is present in the UE side, comprising:
The window starting point is known the unit, is used for last subframe from the PRACH resource occupation, at interval after M the subframe of precognition, with all sub-frame of uplink and first subframe after meeting the special subframe eliminating of presetting rule regard as Msg2 send window starting point;
Window size is known the unit, is used for from described window starting point, and the number of sub-frames N of the precognition after all sub-frame of uplink and the special subframe that meets described presetting rule are got rid of regards as the send window size.
Also comprise:
The special subframe rule is known the unit, is used to know the rule that presets at special subframe or/and the details parameter of described rule, and knows and forbid sending Msg2 on legal special subframe.
Described special subframe rule knows that the special subframe that meets presetting rule that the unit is known comprises: contain GP or/and the special subframe of UpPTS, perhaps, the length of DwPTS is less than the special subframe of the K that presets an OFDM symbol lengths sum.
A kind of system of definite random access leader sequence response Msg2 send window comprises UE and eNB,
Described eNB comprises:
Window starting point setup unit is used for last subframe from the PRACH resource occupation, at interval after M the subframe of precognition, with all sub-frame of uplink and first subframe after meeting the special subframe eliminating of presetting rule be set at Msg2 send window starting point;
The window size setup unit is used for from described window starting point, and the number of sub-frames N of the precognition after all sub-frame of uplink and the special subframe that meets described presetting rule are got rid of is set at the send window size;
Described UE comprises:
The window starting point is known the unit, is used for last subframe from the PRACH resource occupation, at interval after M the subframe of precognition, with all sub-frame of uplink and first subframe after meeting the special subframe eliminating of presetting rule regard as Msg2 send window starting point;
Window size is known the unit, is used for from described window starting point, and the number of sub-frames N of the precognition after all sub-frame of uplink and the special subframe that meets described presetting rule are got rid of regards as the send window size.
Described eNB also comprises:
Special subframe rule setup unit is used for rule being set or/and the details parameter of described rule forbids sending Msg2 on legal special subframe at special subframe;
Described UE also comprises:
The special subframe rule is known the unit, is used to know the rule that presets at special subframe or/and the details parameter of described rule, and knows and forbid sending Msg2 on legal special subframe.
Described special subframe rule setup unit is set or described special subframe rule is known that the unit is known, as to meet described presetting rule special subframe, comprise: contain GP or/and the special subframe of UpPTS, perhaps, the length of DwPTS is less than the special subframe of the K that presets an OFDM symbol lengths sum.
As seen, the present invention proposes under the complete tdd mode of a cover indicating means of Msg2 send window parameter.Its advantage has been both to embody the characteristics of TDD system, has well shielded TDD system various configurations again simultaneously, and as transfer point, special time slot purposes etc., the complexity of the system design that may cause has kept indication form and the performance identical with FDD well.
Description of drawings
Fig. 1 is a frame structure schematic diagram in the prior art LTE FDD system;
Fig. 2 is a frame structure schematic diagram in the prior art LTE TDD system;
Fig. 3 is a Msg2 send window sequential chart in the prior art LTE FDD system;
Fig. 4 determines Msg2 send window flow chart for the present invention;
Fig. 5 is the embodiment of the invention one a Msg2 send window subframe schematic diagram;
Fig. 6 is the embodiment of the invention two Msg2 send window subframe schematic diagrames;
Fig. 7 is the embodiment of the invention three Msg2 send window subframe schematic diagrames;
Fig. 8 is an eNB side device internal structure schematic diagram of the present invention;
Fig. 9 is an eNB side device internal structure schematic diagram of the present invention;
Figure 10 is a system configuration schematic diagram of the present invention.
Embodiment
Core concept of the present invention is that in the TDD system, after all sub-frame of uplink and the eliminating of some special subframe, remaining one or more subframes can be used for the transmission of Msg2 successively, and these subframes have promptly constituted the send window of Msg2.
At having the problem that Msg2 send window indication scheme can't be used in the TDD system now, the present invention provides under the complete tdd mode of a cover, and the indication scheme of Msg2 send window parameter can guarantee system's operate as normal.
For the transmission of Msg2, the main distinction of TDD and FDD system is at following 2 points:
1, Msg2 is a downlink transfer, and the sub-frame of uplink in the TDD system is used for uplink, therefore can't be used for the transmission of Msg2;
2, there is special subframe in the TDD system, wherein contains special areas such as DwPTS/GP/UpPTS.
Since can control channel and data among the DwPTS, so might be used for the transmission of Msg2.
Angle from system design, whether DwPTS is used for the transmission of Msg2, there is multiple possible design, when tending to that DwPTS is set and be used for the transmission of Msg2, the special subframe at DwPTS place just can be looked at as a descending sub frame, on the contrary, if when tending to not be provided with DwPTS and being used for the transmission of Msg2, the special subframe at DwPTS place just can be looked at as a sub-frame of uplink.
Referring to Fig. 4,, comprising for the present invention determines Msg2 send window flow chart:
S401: determine Msg2 send window starting point;
Particularly, from last subframe of PRACH resource occupation, at interval after M the subframe of precognition, with all sub-frame of uplink and first subframe after meeting the special subframe eliminating of presetting rule be defined as Msg2 send window starting point;
S402: determine the send window size;
Particularly, from described window starting point, the number of sub-frames N of the precognition after all sub-frame of uplink and the special subframe that meets described presetting rule got rid of is defined as the send window size.
Wherein, the described special subframe that meets presetting rule is meant all kinds of special subframes; Perhaps, the described special subframe that meets presetting rule is meant and contains the protection time slot or/and the special subframe of ascending pilot frequency; Perhaps, the described special subframe that meets presetting rule is meant that the length of descending pilot frequency is less than the K that a presets OFDM (Orthogonal Frequency Division Multiplexing, the OFDM) special subframe of symbol.
That is to say that the present invention allows system to select in such scheme, therefore can adopt one of following several principles for the processing of special subframe:
(1) principle 1
All special subframes all can not be used for the transmission of Msg2.
(2) principle 2
When not containing GP and UpPTS in the special subframe, this special subframe can be used for the transmission of Msg2, otherwise can not be used for the transmission of Msg2.
(3) principle 3
When the length of contained DwPTS in the special subframe during greater than K OFDM symbol, this special subframe can be used for the transmission of Msg2, otherwise can not be used for the transmission of Msg2.The concrete value of K can be fixed in the agreement, also can be by network by explicit signaling or conceal signaling notice UE.
Thus, realize that the present invention program may further comprise the steps:
Step 1: determine the using priciple (for example select in top 3 kinds of principles some) of special subframe, be fixed in the communication protocol (standard), perhaps determine that by network side the back configuration gives eNB and UE.
Step 2: with Msg2 send window parameter designing is two parts: window starting point and window size, and its implication and indicating means are defined as follows:
[1] window origin parameters
For certain PRACH resource, if window starting point value is M (ms of unit), then expression: count from this PRACH resource place subframe, after M the subframe in interval, with first subframe after all sub-frame of uplink and some special subframe (according to the definite principle of the step 1) eliminating is exactly the subframe the earliest that can be used for corresponding Msg2 transmission, the i.e. actual start of Msg2 send window.
The value of window origin parameters can be fixed in the communication protocol (standard), as is fixed as 3ms; Also can determine that the back configuration to eNB and UE, is configured to 4ms as the window starting point by network side.
[2] window size parameter
For certain PRACH resource, the implication of window size is: count from the subframe at above-mentioned window actual start place, with the number of subframes of the order that can be used for corresponding Msg2 transmission after all sub-frame of uplink and some special subframe (according to the definite principle of the step 1) eliminating.
The value of window size parameter can be fixed in the standard, as is fixed as 4ms; Also can determine that the back configuration to eNB and UE, is configured to 5ms as window size by network side.
Provide three specific embodiments below.
At first introduce embodiment one.
Make some hypothesis:
1. in certain TDD system, the using priciple of special subframe is: all special subframes all can not be used for the transmission (i.e. Shang Mian principle 1) of Msg2.
2. regulation Msg2 window starting point is 2ms in the communication protocol (standard).
3. network side determines that the Msg2 window size is that eNB and UE are given in 4ms and configuration.
4. the time slot conversion configurations of TDD system is: the ascending-descending subframes assignment period is 10ms, and the ascending-descending subframes ratio is 6: 3 in the 10ms cycle.
If certain PRACH is positioned at subframe #1 (only taking 1 subframe), the then Msg2 of this PRACH correspondence
The subframe of send window correspondence as shown in Figure 5.
As shown in Figure 5, subframe # 6 is a special subframe, on principle 1 transmission that can not be used for Msg2.
2 subframes are subframe # 3 at interval behind the subframe # 1 at PRACH place, because subframe # 3, #4 are sub-frame of uplink, thus can not be used for the Msg2 transmission, so the actual start of Msg2 window is subframe # 5.
#5 is counted from subframe, removes outside the special subframe # 6, and subframe # 7, #8, #9 all can be used for the Msg2 transmission, and according to the window size of network configuration, window is by arriving subframe # 9.
In a word, the actual subframe that comprises of the Msg2 window of described PRACH correspondence is subframe # 5, #7, #8, #9.
Introduce embodiment two below.
Make some hypothesis:
1) in certain TDD system, the using priciple of special subframe is: when not containing GP and UpPTS in the special subframe, this special subframe can be used for the transmission of Msg2, otherwise can not be used for the transmission (i.e. Shang Mian principle 2) of Msg2.
2) regulation Msg2 window starting point is 3ms in the communication protocol (standard).
3) network side determines that the Msg2 window size is that eNB and UE are given in 3ms and configuration.
4) the time slot conversion configurations of TDD system is: the ascending-descending subframes assignment period is 10ms, and the ascending-descending subframes ratio is 6: 3 in the 10ms cycle.
If certain PRACH is positioned at subframe #3 (only taking 1 subframe), the then Msg2 of this PRACH correspondence
The subframe of send window correspondence as shown in Figure 6.
As shown in Figure 6, subframe # 6 is a special subframe, but because do not comprise GP and UpPTS, on principle 2, can be used for the transmission of Msg2.
3 subframes are subframe # 6 at interval behind the subframe # 3 at PRACH place, so the actual start of Msg2 window is subframe # 6.
#6 is counted from subframe, and subframe # 7, #8, #9 all can be used for the Msg2 transmission, and according to the window size of network configuration, window is by arriving subframe # 8.
In a word, the actual subframe that comprises of the Msg2 window of described PRACH correspondence is subframe # 6, #7, #8.
Introduce embodiment three below.
Make following 6 hypothesis:
(A) when the length of contained DwPTS in the special subframe during greater than K OFDM symbol, this special subframe can be used for the transmission of Msg2, otherwise can not be used for the transmission (i.e. Shang Mian principle 3) of Msg2.
(B) regulation Msg2 window starting point is 2ms in the communication protocol (standard).
(C) network side determines that the Msg2 window size is that eNB and UE are given in 3ms and configuration.
(D) the time slot conversion configurations of TDD system is: the ascending-descending subframes assignment period is 10ms, and the ascending-descending subframes ratio is 6: 3 in the 10ms cycle.
(E) network side determines that K OFDM symbol lengths is L
0And eNB and UE are given in configuration.
(F) in the TDD system in the special subframe length of DwPTS be L
1, and L
1＜L
0
If certain PRACH is positioned at subframe #1 (only taking 1 subframe), then the subframe of the Msg2 send window correspondence of this PRACH correspondence as shown in Figure 7.
As shown in Figure 7, subframe # 6 is a special subframe, but because L
1＜L
0, on principle 3, subframe # 6 cannot be used for the transmission of Msg2.
2 subframes are subframe # 3 at interval behind the subframe # 3 at PRACH place, but because subframe # 3, #4 are sub-frame of uplink, and the special subframe of subframe # 6 for getting rid of, so the actual start of Msg2 window is subframe # 5.
#5 is counted from subframe, gets rid of subframe # 6, and subframe # 7, #8 all can be used for the Msg2 transmission, and according to the window size of network configuration, window is by arriving subframe # 8.
In a word, the actual subframe that comprises of the Msg2 window of described PRACH correspondence is subframe # 5, #7, #8.
Corresponding with said method, the invention provides the device that is used to set the Msg2 send window that is positioned at the eNB side, this device can be eNB itself, also can be the functional entity that is positioned at eNB inside, can be realized by hardware, software or software and hardware combining mode.
Referring to Fig. 8, for being positioned at eNB side apparatus structure schematic diagram, this device comprises PRACH determining unit 801, special subframe rule setup unit 802, window starting point setup unit 803 and window size setup unit 804, below each Elementary Function is introduced respectively:
PRACH determining unit 801 is used for determining last subframe of PRACH resource occupation;
Special subframe rule setup unit 802 is used at special subframe rule being set, and forbids sending Msg2 on legal special subframe;
Window starting point setup unit 803 is used for last subframe from the PRACH resource occupation, at interval after M the subframe of precognition, with all sub-frame of uplink and first subframe after meeting the special subframe eliminating of presetting rule be set at Msg2 send window starting point;
Window size setup unit 804 is used for from described window starting point, and the number of sub-frames N of the precognition after all sub-frame of uplink and the special subframe that meets described presetting rule are got rid of is set at the send window size.
Wherein, described rule and possible details parameter (as the K value in the above-mentioned principle 3) can be fixed in the communication protocol simultaneously, perhaps determine that by network side the back configuration is to eNB and UE simultaneously, perhaps rule is fixed in communication protocol, and possible details parameter determines that by network side the back configuration is to eNB and UE.If rule and possible details parameter all are fixed in the communication protocol, then do not need special subframe rule setup unit 802, promptly from communication protocol, directly know rule.
When scheme implementation, above-mentioned each unit co-ordination flow process is:
At first, determine last subframe of PRACH resource occupation by PRACH determining unit 801;
Then, window starting point setup unit 803 is from last subframe of this PRACH resource occupation, after M the subframe that presets at interval, with all sub-frame of uplink and first subframe after meeting the special subframe eliminating of special subframe rule setup unit 802 presetting rule be set at the starting point of Msg2 send window;
Then, the window starting point that window size setup unit 804 is determined from window starting point setup unit 803, the number of sub-frames N of the precognition after all sub-frame of uplink and the special subframe that meets described special subframe rule setup unit 802 presetting rule got rid of is set at the send window size.
Wherein, the special subframe that meets presetting rule that described special subframe control unit 802 is realized comprises: all kinds of special subframes, contain GP or/and the special subframe of UpPTS, perhaps, the length of DwPTS is less than the special subframe of the K that presets an OFDM symbol.
Preferably, this device also can comprise:
Window parameter unit 805 is used for the parameter M of default described window starting point and the parameter N of described window size, perhaps, is used for knowing from top signaling the parameter N of the parameter M and the described window size of described window starting point.
Corresponding with said method with the device that is positioned at the eNB side, the present invention also provides a kind of device that is used to know the Msg2 send window of the UE of being positioned at side, this device can be UE itself, also can be the functional entity that is positioned at UE inside, can be realized by hardware, software or software and hardware combining mode.
Referring to Fig. 9, for being positioned at UE side apparatus structure schematic diagram, this device comprises that the special subframe rule knows that unit 901, window starting point know that unit 902 and window size know unit 903, below each Elementary Function is introduced respectively:
The special subframe rule is known unit 901, is used at special subframe rule being set, and forbids sending Msg2 on legal special subframe;
The window starting point is known unit 902, is used for last subframe from the PRACH resource occupation, at interval after M the subframe of precognition, with all sub-frame of uplink and first subframe after meeting the special subframe eliminating of presetting rule be known as Msg2 send window starting point;
Window size is known unit 903, is used for from described window starting point, and the number of sub-frames N of the precognition after all sub-frame of uplink and the special subframe that meets described presetting rule are got rid of is known as the send window size.
Wherein, described rule and possible details parameter (as the K value in the above-mentioned principle 3) can be fixed in the communication protocol simultaneously, perhaps determine that by network side the back configuration is to eNB and UE simultaneously, perhaps rule is fixed in communication protocol, and possible details parameter determines that by network side the back configuration is to eNB and UE.If rule and possible details parameter all are fixed in the communication protocol, then do not need special subframe rule setup unit 802, promptly from communication protocol, directly know rule.
When scheme implementation, above-mentioned each unit co-ordination flow process is:
At first, determine last subframe by UE at the PRACH resource occupation;
Then, the window starting point is known unit 902 last subframe from this PRACH resource occupation, after M the subframe that presets at interval, with all sub-frame of uplink and meet the special subframe rule and know that first subframe after the special subframe eliminating of unit 901 presetting rule is known as the starting point of Msg2 send window;
Then, window size knows that unit 903 knows the window starting point that unit 902 is determined from the window starting point, with all sub-frame of uplink with meet described special subframe rule and know that the number of sub-frames N of the precognition after the special subframe of unit 901 presetting rule is got rid of is known as the send window size.
Wherein, the special subframe that meets presetting rule that described special subframe control unit 901 is realized comprises: all kinds of special subframes, contain GP or/and the special subframe of UpPTS, perhaps, the length of DwPTS is less than the special subframe of the K that presets an OFDM symbol.
In addition, the present invention also provides a kind of system of the Msg2 of deciding send window, referring to Figure 10, is this system configuration schematic diagram, and this system comprises eNB1001 and UE1002, and described UE1002 sends Msg1 on the PRACH resource that eNB1001 distributes, wherein,
Described eNB1001 comprises:
Special subframe rule setup unit 10011 is used at special subframe rule being set, and forbids sending Msg2 on legal special subframe;
Window starting point setup unit 10012, be used for last subframe from the PRACH resource occupation, at interval after M the subframe of precognition, with all sub-frame of uplink and first subframe after meeting the special subframe eliminating of presetting rule be set at Msg2 send window starting point;
Window size setup unit 10013 is used for from described window starting point, and the number of sub-frames N of the precognition after all sub-frame of uplink and the special subframe that meets described presetting rule are got rid of is set at the send window size;
Described UE comprises:
The special subframe rule is known unit 10021, is used to know the rule that presets at special subframe, and knows and forbid sending Msg2 on legal special subframe;
The window starting point is known unit 10022, be used for last subframe from the PRACH resource occupation, at interval after M the subframe of precognition, with all sub-frame of uplink and first subframe after meeting the special subframe eliminating of presetting rule regard as Msg2 send window starting point;
Window size is known unit 10023, is used for from described window starting point, and the number of sub-frames N of the precognition after all sub-frame of uplink and the special subframe that meets described presetting rule are got rid of regards as the send window size.
Wherein, described rule and possible details parameter (as the K value in the above-mentioned principle 3) can be fixed in the communication protocol simultaneously, perhaps determine that by network side the back configuration is to eNB and UE simultaneously, perhaps rule is fixed in communication protocol, and possible details parameter determines that by network side the back configuration is to eNB and UE.If rule and possible details parameter all are fixed in the communication protocol, then do not need special subframe rule setup unit 802, promptly from communication protocol, directly know rule.
Wherein, that set or the described special subframe rule of described special subframe rule setup unit 10011 is known the special subframe that the unit is 10021 that know, meet described presetting rule, comprise: all kinds of special subframes, contain GP or/and the special subframe of UpPTS, perhaps, the length of DwPTS is less than the special subframe of the K that presets an OFDM symbol.
The present invention proposes under the complete tdd mode of a cover indicating means of Msg2 send window parameter.Its advantage has been both to embody the characteristics of TDD system, has well shielded TDD system various configurations again simultaneously, and as transfer point, special time slot purposes etc., the complexity of the system design that may cause has kept indication form and the performance identical with FDD well.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (14)
1. the method for a definite random access leader sequence response Msg2 send window is characterized in that, comprising:
Determine Msg2 send window starting point:
From last subframe of Physical Random Access Channel PRACH resource occupation, at interval after M the subframe of precognition, with all sub-frame of uplink and first subframe after meeting the special subframe eliminating of presetting rule be defined as Msg2 send window starting point;
Determine the send window size:
From described window starting point, the number of sub-frames N of the precognition after all sub-frame of uplink and the special subframe that meets described presetting rule got rid of is defined as the send window size.
2. according to the described method of claim 1, it is characterized in that the described special subframe that meets presetting rule is meant and contains protection time slot GP or/and the special subframe of ascending pilot frequency UpPTS.
3. according to the described method of claim 1, it is characterized in that the described special subframe that meets presetting rule is meant the special subframe of the length of descending pilot frequency DwPTS less than the K that presets an orthogonal frequency division multiplex OFDM symbol lengths sum.
4. according to the described method of claim 4, it is characterized in that described OFDM symbol numbers K stipulates that in communication protocol perhaps, described OFDM symbol numbers K determines that by network side the back configuration is to evolved base station eNB and user equipment (UE).
5. according to the described method of claim 1, it is characterized in that described rule is stipulated, perhaps, determines that by network side the back configuration is to eNB and UE in communication protocol.
6. the device of a definite random access leader sequence response Msg2 send window is present in the eNB side, comprises the PRACH determining unit, is used for determining last subframe of PRACH resource occupation, it is characterized in that, also comprises:
Window starting point setup unit is used for last subframe from the PRACH resource occupation, at interval after M the subframe of precognition, with all sub-frame of uplink and first subframe after meeting the special subframe eliminating of presetting rule be set at Msg2 send window starting point;
The window size setup unit is used for from described window starting point, and the number of sub-frames N of the precognition after all sub-frame of uplink and the special subframe that meets described presetting rule are got rid of is set at the send window size.
7. according to the described device of claim 6, it is characterized in that, also comprise:
Special subframe rule setup unit is used for rule being set or/and the details parameter of described rule forbids sending Msg2 on legal special subframe at special subframe.
8. according to the described device of claim 7, it is characterized in that,
The special subframe that meets presetting rule that described special subframe rule setup unit is realized comprises: contain GP or/and the special subframe of UpPTS, perhaps, the length of DwPTS is less than the special subframe of the K that presets an OFDM symbol lengths sum.
9. a device of knowing random access leader sequence response Msg2 send window is present in the UE side, it is characterized in that, comprising:
The window starting point is known the unit, is used for last subframe from the PRACH resource occupation, at interval after M the subframe of precognition, with all sub-frame of uplink and first subframe after meeting the special subframe eliminating of presetting rule regard as Msg2 send window starting point;
Window size is known the unit, is used for from described window starting point, and the number of sub-frames N of the precognition after all sub-frame of uplink and the special subframe that meets described presetting rule are got rid of regards as the send window size.
10. according to the described device of claim 9, it is characterized in that, also comprise:
The special subframe rule is known the unit, is used to know the rule that presets at special subframe or/and the details parameter of described rule, and knows and forbid sending Msg2 on legal special subframe.
11. according to the described device of claim 10, it is characterized in that,
Described special subframe rule knows that the special subframe that meets presetting rule that the unit is known comprises: contain GP or/and the special subframe of UpPTS, perhaps, the length of DwPTS is less than the special subframe of the K that presets an OFDM symbol lengths sum.
12. the system of a definite random access leader sequence response Msg2 send window comprises UE and eNB, it is characterized in that,
Described eNB comprises:
Window starting point setup unit is used for last subframe from the PRACH resource occupation, at interval after M the subframe of precognition, with all sub-frame of uplink and first subframe after meeting the special subframe eliminating of presetting rule be set at Msg2 send window starting point;
The window size setup unit is used for from described window starting point, and the number of sub-frames N of the precognition after all sub-frame of uplink and the special subframe that meets described presetting rule are got rid of is set at the send window size;
Described UE comprises:
The window starting point is known the unit, is used for last subframe from the PRACH resource occupation, at interval after M the subframe of precognition, with all sub-frame of uplink and first subframe after meeting the special subframe eliminating of presetting rule regard as Msg2 send window starting point;
Window size is known the unit, is used for from described window starting point, and the number of sub-frames N of the precognition after all sub-frame of uplink and the special subframe that meets described presetting rule are got rid of regards as the send window size.
13. according to the described system of claim 12, it is characterized in that,
Described eNB also comprises:
Special subframe rule setup unit is used for rule being set or/and the details parameter of described rule forbids sending Msg2 on legal special subframe at special subframe;
Described UE also comprises:
The special subframe rule is known the unit, is used to know the rule that presets at special subframe or/and the details parameter of described rule, and knows and forbid sending Msg2 on legal special subframe.
14. according to the described system of claim 13, it is characterized in that, described special subframe rule setup unit is set or described special subframe rule is known that the unit is known, as to meet described presetting rule special subframe, comprise: contain GP or/and the special subframe of UpPTS, perhaps, the length of DwPTS is less than the special subframe of the K that presets an OFDM symbol lengths sum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101044675A CN101562897B (en) | 2008-04-18 | 2008-04-18 | Method for determining a random access leading sequence response transmit window as well as device and system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101044675A CN101562897B (en) | 2008-04-18 | 2008-04-18 | Method for determining a random access leading sequence response transmit window as well as device and system thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101562897A CN101562897A (en) | 2009-10-21 |
| CN101562897B true CN101562897B (en) | 2010-11-17 |
Family
ID=41221457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101044675A Active CN101562897B (en) | 2008-04-18 | 2008-04-18 | Method for determining a random access leading sequence response transmit window as well as device and system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101562897B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102088306B (en) * | 2010-07-15 | 2013-06-26 | 北京大学 | Uplink pilot signal transmitting method for satellite communication in TDD (time division duplex) or HFDD (half frequency division duplex) mode |
| EP2557884B1 (en) * | 2011-08-10 | 2015-10-28 | Alcatel Lucent | Apparatus, method and computer program for performing an uplink random access procedure |
| WO2014110805A1 (en) * | 2013-01-18 | 2014-07-24 | Broadcom Corporation | Random access for coverage improvement |
| CN108599836B (en) | 2013-02-22 | 2023-06-23 | 华为技术有限公司 | Subframe generation method and device, subframe determination method and user equipment |
| CN104581925B (en) | 2013-10-29 | 2019-01-08 | 电信科学技术研究院 | A kind of timed maintenance method and device under coverage enhancement mechanism |
| US9794961B2 (en) * | 2013-10-31 | 2017-10-17 | Htc Corporation | Method of handling random access in wireless communication system |
| EP3098995B1 (en) | 2014-03-10 | 2020-01-08 | Huawei Technologies Co., Ltd. | Data transmission method, sender device and receiver device |
| US10764867B2 (en) * | 2016-09-27 | 2020-09-01 | Lg Electronics Inc. | Method and device for selecting resource and transmitting PSSCH in wireless communication system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101102605A (en) * | 2007-08-15 | 2008-01-09 | 中兴通讯股份有限公司 | Random access method of cellular wireless communication system |
| CN101128062A (en) * | 2007-09-24 | 2008-02-20 | 中兴通讯股份有限公司 | Method for terminal random access to cellular wireless communication system and group identifier generation method |
-
2008
- 2008-04-18 CN CN2008101044675A patent/CN101562897B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101102605A (en) * | 2007-08-15 | 2008-01-09 | 中兴通讯股份有限公司 | Random access method of cellular wireless communication system |
| CN101128062A (en) * | 2007-09-24 | 2008-02-20 | 中兴通讯股份有限公司 | Method for terminal random access to cellular wireless communication system and group identifier generation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101562897A (en) | 2009-10-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3783960B1 (en) | Method for allocating sidelink resource, device, and system | |
| CN108781470B (en) | Random access backoff method and system | |
| CN101562897B (en) | Method for determining a random access leading sequence response transmit window as well as device and system thereof | |
| JP5508284B2 (en) | Signal transmission method of physical downlink control channel in downlink pilot time slot | |
| AU2020260378B2 (en) | Resource indication method and related device and system | |
| CN101005308B (en) | Physical layer random access method for broad band time division duplex mobile communication system | |
| CN109788574B (en) | Random access method, user equipment and network equipment | |
| EP2945454B1 (en) | Methods and devices for sending control information and receiving control information | |
| EP2299746A1 (en) | Method for transmitting the pdcch signal | |
| CN100566214C (en) | The communication means of time division duplex mobile communication system | |
| EP2278847A1 (en) | A method for mapping physical random access channels (prachs) | |
| US20200336266A1 (en) | Uplink Reference Signal Transmission Method, User Terminal, and Base Station | |
| CN105682232A (en) | Resource configuration method, resource configuration device and base station | |
| WO2020199734A1 (en) | Random access signal sending method and apparatus, random access signal receiving method and apparatus, storage medium and electronic apparatus | |
| CN106973441A (en) | A kind of accidental access method and device | |
| KR101730363B1 (en) | Method for transmitting uplink data, user equipment, and base station | |
| KR20090081308A (en) | Method For Configuration of Time Domain Frame Structure In Heterogeneous TDD System | |
| EP3820187B1 (en) | Unlicensed channel sharing methods and storage medium | |
| CN102036359B (en) | Method and equipment for transmitting uplink transmission information | |
| CN102257751A (en) | Method and apparatus for data transmission using a data frame | |
| CN113747599B (en) | User equipment, base station and method thereof | |
| CN101374011B (en) | Method for implementing critical frequency coexist between two different communication systems and physical layer frame structure | |
| CN101425991A (en) | Broadcast information transmission method and apparatus | |
| CN101197636B (en) | Method and device for resource distribution in TDD system descending special time slot | |
| CN107294671B (en) | Method and device for sending random access subframe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: INST OF TELECOMMUNICATION SCIENCE AND TECHNOLGOY Free format text: FORMER OWNER: DATANG MOBILE COMMUNICATION EQUIPMENT CO., LTD. Effective date: 20110523 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100083 NO. 29, XUEYUAN ROAD, HAIDIAN DISTRICT, BEIJING TO: 100083 NO. 40, XUEYUAN ROAD, HAIDIAN DISTRICT, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20110523 Address after: 100083 No. 40, Haidian District, Beijing, Xueyuan Road Patentee after: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY Address before: 100083 Haidian District, Xueyuan Road, No. 29, Patentee before: DATANG MOBILE COMMUNICATIONS EQUIPMENT Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 100083 No. 40, Haidian District, Beijing, Xueyuan Road Patentee after: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY Address before: 100083 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |
|
| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210531 Address after: 100085 1st floor, building 1, yard 5, Shangdi East Road, Haidian District, Beijing Patentee after: DATANG MOBILE COMMUNICATIONS EQUIPMENT Co.,Ltd. Address before: 100083 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |