CN102905361B - Timing method and device under multi-carrier situation - Google Patents
Timing method and device under multi-carrier situation Download PDFInfo
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- CN102905361B CN102905361B CN201110213972.5A CN201110213972A CN102905361B CN 102905361 B CN102905361 B CN 102905361B CN 201110213972 A CN201110213972 A CN 201110213972A CN 102905361 B CN102905361 B CN 102905361B
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- carrier
- base station
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Abstract
The embodiment of the invention discloses a timing method under the multi-carrier situation. The timing method under the multi-carrier situation is characterized in that the method comprises the following steps that: when a base station sends data through more than two downlink carriers, one downlink carrier is taken as a reference carrier, and the timing deviation amount of other downlink carriers relative to the reference carrier is determined according to the position of UE (user equipment) relative to the base station; and the base station regulates the time for sending the data to the UE when downlink data is transmitted according to the timing deviation amount of the downlink carrier of the base station relative to the reference carrier. According to the invention, downlink data from different downlink carriers are prevented from interfering mutually at the UE side in the carrier accumulating occasion.
Description
Technical field
The present invention relates to multi-transceiver technology field, particularly relate to the timing method under a kind of multi-carrier situation and equipment.
Background technology
In LTE system, for TDD system, its frame structure as shown in Figure 1.
Fig. 1 is the frame structure schematic diagram of TDD system.
As shown in Figure 1, a radio frames comprises two fields, 10 subframes, and namely each field comprises 5 subframes, and wherein, each radio frames equals 10ms, and each subframe equals 1ms.In 10 subframes of radio frames, comprise descending sub frame, sub-frame of uplink and special subframe, below in conjunction with table 1, the sub-frame configuration in a radio frames is described.
Table 1: the sub-frame configuration in a radio frames
From table 1, TDD system distinguishes uplink and downlink transmission the dependence time.
In LTE R8/9 version, for some UE, a timing relationship is had: namely for certain UE between uplink and downlink sub-frame transmission, first the descending sub frame that base station issues is received, after the time having experienced downlink transfer, when needing to carry out uplink, now up-link wireless frame can to need the time of the sub-frame of uplink sent for benchmark, on this basis, (N is shifted to an earlier date
tA+ N
tAoffset) moment of Ts is defined as the initial time of corresponding up-link wireless subframe.
Fig. 2 is the timing relationship schematic diagram between uplink and downlink sub-frame transmission.
As shown in Figure 2, when UE sends upstream data on radio frames i, first identify frame boundaries and the boundary of time slot of radio frames according to the downlink radio frame before up-link wireless frame i, then according to the frame boundaries of this up-link wireless frame i, (N in advance
tA+ N
tAoffset) Ts to start to send upstream data second.
Wherein, 0≤N
tA≤ 20512, N
tAby base station by signaling to UE; For FDD, N
tAoffset=0; For TDD, N
tAoffset=624; T
s=1/ (15000 × 2048).
In LTE R10 version, downstream transmission introduces carrier aggregation technology.In the scene of carrier aggregation, for base station and UE, all descending carriers adopt identical timing relationship, namely the initial time of the radio frames of all descending carriers is identical, timing relationship between up-link carrier and descending carrier is determined according to the timing relationship shown in Fig. 2, therefore, all up-link carriers also adopt identical timing relationship.
Fig. 3 is a kind of concrete application scenarios schematic diagram in the scene of carrier aggregation.
As shown in Figure 3, in the application scenarios that this is concrete, the overlay area of macro base station F1 and the overlay area of micro-base station F2 overlap, user equipment (UE) 1 is just in time in the coincidence overlay area of F1 and F2, therefore UE1 can use carrier aggregation technology, F1 and F2 namely can be utilized to carry out the transmission of uplink and downlink data simultaneously.
Suppose that UE1 receives the downlink data of F1 on descending carrier 1, descending carrier 2 receives the downlink data of F2, according to current technical scheme, descending carrier 1 and descending carrier 2 need to adopt identical timing relationship, namely macro base station F1 sends downlink data in the identical moment to UE1 with micro-base station F2, because the distance of macro base station F1 and UE1 differs larger with the distance of micro-base station F2 and UE1, therefore the downlink data that the downlink data causing macro base station F1 to send and micro-base station F2 send cannot be arrived UE1 simultaneously, and probably exceed the scope that general cyclic prefix (CP) allows, in UE1 side, the downlink data of the downlink data of macro base station F1 and micro-base station F2 is caused mutually to disturb, and then affect the performance of UE1 downlink data receiving.
Summary of the invention
In view of this, the invention provides the timing method in a kind of carrier aggregation scene and equipment, within the scope that the downlink data that different descending carrier can be made to issue allows at CP, and then avoid in carrier aggregation scene, from the mutual interference of downlink data in UE side of different descending carrier.
Technical scheme of the present invention is specifically achieved in that
A timing method under multi-carrier situation, the method comprises:
When sending data in base station by plural descending carrier, with one of them descending carrier for reference carrier, according to the position of UE relative to the base station to this UE transmission data, determine the timing offset of other descending carriers relative to this reference carrier;
Base station, according to the timing offset of the descending carrier of self relative to described reference carrier, adjusts the time sending data to this UE.
A kind of base station equipment, this base station equipment comprises time block and sending module;
Described time block, during for sending data in base station by plural descending carrier, with one of them descending carrier for reference carrier, according to the position of UE relative to this base station equipment, determine the timing offset of descending carrier relative to this reference carrier of base station equipment;
Described sending module, for according to the descending carrier of this base station equipment self timing offset relative to described reference carrier, adjusts the time sending data to this UE.
As seen from the above technical solution, in the present invention, when base station sends data by plural descending carrier, with one of them descending carrier for reference carrier, according to the position of UE relative to the base station to this UE transmission data, determine the timing offset of other descending carriers relative to this reference carrier; Base station, according to the timing offset of the descending carrier of self relative to described reference carrier, adjusts the time sending data to this UE., thus make that UE is received by different descending carriers, in same subframe downlink data, almost arrive UE simultaneously, thus avoid and mutually disturb in UE side from the downlink data on different descending carrier.
Accompanying drawing explanation
Fig. 1 is the frame structure schematic diagram of TDD system.
Fig. 2 is the timing relationship schematic diagram between ascending-descending subframes.
Fig. 3 is a kind of concrete application scenarios schematic diagram in the scene of carrier aggregation.
Fig. 4 is the timing method flow chart in carrier aggregation scene provided by the invention.
Fig. 5 is the timing relationship schematic diagram of descending carrier provided by the invention.
Fig. 6 is the timing relationship schematic diagram of up-link carrier provided by the invention.
Fig. 7 is the structure chart of base station equipment provided by the invention.
Embodiment
Fig. 4 is the timing method flow chart in carrier aggregation scene provided by the invention.
As shown in Figure 4, the method comprises:
Step 401, when sending data in base station by plural descending carrier, with one of them descending carrier for reference carrier, according to the position of UE relative to the base station to this UE transmission data, determine the timing offset of other descending carriers relative to this reference carrier.
Step 402, base station, according to the timing offset of the descending carrier of self relative to described reference carrier, adjusts the time sending data to this UE.
Wherein, when base station sends data by plural descending carrier, the frequency range of this plural descending carrier can be identical, also can be different.
Visible, by the method shown in Fig. 4, the timing relationship of plural descending carrier can be determined, and when making to send downlink data by plural descending carrier to UE according to this timing relationship, the downlink data in same subframe can be made simultaneously almost to arrive UE, thus avoid the UE side downlink data caused because the downlink data in same subframe can not arrive UE simultaneously mutually to disturb.
Such as, in the application scenarios shown in Fig. 3, according to the position of UE relative to macro base station F1 and the position relative to micro-base station F2, suppose with descending carrier 1 for reference carrier, the timing offset of descending carrier 2 relative to descending carrier 1 can be determined, then micro-base station F2 sends the time of downlink data to this UE according to the adjustment of this timing offset, thus the downlink data in the same subframe making micro-base station F2 and macro base station F1 send almost arrives UE simultaneously, namely within the scope of CP permission, thus the mutual interference of downlink data in UE side from different base station is avoided.
In UE side, according to the synchronizing signal of each descending carrier, boundary of time slot and the sub-frame boundary of each carrier wave can be determined, then according to the uplink and downlink time slot proportion of each carrier wave, determine the timing relationship of each up-link carrier corresponding with descending carrier, so that the time of UE adjustment transmit ascending data on up-link carrier.
Particularly, base station can according to the uplink timing advance TA value of reference carrier and the timing offset of other descending carriers relative to this reference carrier, determine the uplink timing advance TA value of other carrier waves described, the uplink timing advance TA value of each carrier wave is issued UE; UE sends the time of upstream data according to this UE of uplink timing advance TA value adjustment of each carrier wave.
User equipment (UE), according to the synchronizing signal of each descending carrier, can determine boundary of time slot and the sub-frame boundary of each descending carrier; Then according to the uplink and downlink time slot proportion of each carrier wave, the sub-frame of uplink border of up-link carrier is determined; Then be handed down to the uplink timing advance TA value of each carrier wave of UE according to base station, adjust the time of transmit ascending data on each up-link carrier.
After determining the timing relationship of descending carrier and the timing relationship of up-link carrier according to the present invention, can also determine corresponding across carrier scheduling method.Particularly:
When on the subframe n of descending carrier bear control information, for controlling the information transmission of other descending carriers beyond this descending carrier time, this control information is specifically for controlling the information transmission of the subframe n on other descending carriers described.In other words, bear control information in the subframe of descending carrier, this control information is for controlling the information transmission of the subframe of other descending carriers beyond this descending carrier, and the numbering carrying the subframe of this control information is identical with the numbering of controlled subframe.
When on the subframe n of descending carrier bear control information, for controlling the information transmission of up-link carrier time, this control information is specifically for controlling the information transmission of the subframe n+k of up-link carrier, k wherein determines according to uplink and downlink time slot proportion, and the value about k specifically can see table 2.
The value of k under the different uplink and downlink time slot proportion of table 2
Below in conjunction with accompanying drawing, carry out exemplary illustration to the timing relationship of descending carrier provided by the invention and the timing relationship of up-link carrier, given example is not limited to the present invention.
Fig. 5 is the timing relationship schematic diagram of descending carrier provided by the invention.
As shown in Figure 5, CC1 and CC
ibe descending carrier, wherein CC1 is reference carrier, then CC
irelative to the timing offset of reference carrier CC1 be
second, descending carrier CC
ithe initial time of downlink radio frame i compared with the initial time of the downlink radio frame i of descending carrier CC1, stepped back
second.
Parameter wherein
can at descending carrier CC
iwhen being activated, be handed down to UE by base station by the high-level signaling of descending carrier CC1.
By adopting the timing relationship between determination descending carrier of the present invention, for UE, can ensure that the transmission of multiple descending carrier arrives UE simultaneously, decreasing the data buffer storage amount of UE, decrease the complexity of UE deal with data.
Fig. 6 is the timing relationship schematic diagram of up-link carrier provided by the invention.
As shown in Figure 6, for reference carrier CC1, the uplink timing offset amount TA value of CC1 is determined according to the upward signal of this carrier wave received in base station
For other carrier wave CCi, owing to having carried out when downlink transfer
time adjustment, illustrate this base station from the distance of UE and reference carrier gap larger.So the uplink timing offset amount TA value of CCi carrier wave
can be
Base station just can send to UE this value after determining the uplink timing advance TA value of each up-link carrier.UE determines sub-frame boundary and boundary of time slot according to the synchronizing signal on each descending carrier, then according to the uplink and downlink time slot proportion of each carrier wave, determine the frame boundaries that up-link wireless frame transmits, then according to the uplink timing offset amount TA value of each carrier wave, the transmission of adjustment upstream data.
It should be noted that: if UE uses two or more carrier wave to carry out the transmission of upstream data, base station also only can send the uplink timing offset amount TA value of up main carrier
with
the uplink timing offset amount TA value of other carrier wave is calculated to UE, UE oneself
Fig. 7 is the structure chart of base station equipment provided by the invention.
As shown in Figure 7, this base station equipment comprises time block 701 and sending module 702.
Time block 701, during for sending data in base station by plural descending carrier, with one of them descending carrier for reference carrier, according to the position of UE relative to this base station equipment, determine the timing offset of descending carrier relative to this reference carrier of base station equipment.
Sending module 702, for according to the descending carrier of this base station equipment self timing offset relative to described reference carrier, adjusts the time sending data to this UE.
Time block 701, for according to the timing offset of descending carrier relative to reference carrier, determine the numbering of each subframe in the initial time of the radio frames of this descending carrier and radio frames, carry out the transmission of downlink data according to descending carrier relative to the timing offset of reference carrier.
Sending module 702, for bear control information on the subframe n of descending carrier, this control information is for controlling the information transmission of the subframe n on other descending carriers beyond this descending carrier or the information transmission for the subframe n+k that controls up-link carrier, and k wherein determines according to uplink and downlink time slot proportion.
Sending module 702, for when descending carrier is activated, issues described UE by the descending carrier of this base station self relative to the timing offset of reference carrier.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (11)
1. the timing method under multi-carrier situation, is characterized in that, the method comprises:
When sending data in base station by plural descending carrier, with one of them descending carrier for reference carrier, according to the position of UE relative to base station, determine the timing offset of other descending carriers relative to this reference carrier, to determine the timing relationship of plural descending carrier;
Base station is according to the timing offset of the descending carrier of self relative to described reference carrier, adjust the time sending data to this UE, when making to send downlink data by plural descending carrier to UE according to this timing relationship, the downlink data in same subframe can be made almost to arrive UE simultaneously.
2. method according to claim 1, is characterized in that, the method also comprises:
According to the uplink timing advance TA value of reference carrier and other descending carriers relative to the timing offset of this reference carrier, determine the uplink timing advance TA value of other carrier waves;
UE sends the time of upstream data according to this UE of uplink timing advance TA value adjustment of each carrier wave.
3. method according to claim 2, is characterized in that,
The uplink timing advance TA value of reference carrier is deducted described timing offset by base station, acquired results is defined as the uplink timing advance TA value of corresponding carriers, and the uplink timing advance TA value of each carrier wave is issued UE by described base station.
4. method according to claim 2, is characterized in that,
The uplink timing advance TA value of reference carrier and other descending carriers are issued UE relative to the timing offset of this reference carrier by base station, the uplink timing advance TA value of reference carrier is deducted described timing offset by UE, acquired results is defined as the uplink timing advance TA value of corresponding carriers.
5. method according to claim 2, is characterized in that, the method also comprises:
UE is according to the synchronizing signal of each descending carrier, determine the numbering of each subframe in the initial time of the radio frames of this descending carrier and radio frames, according to the uplink and downlink time slot proportion of each carrier wave, determine the numbering of each subframe in the initial time of the radio frames of up-link carrier and radio frames;
Bear control information on the subframe n of descending carrier, this control information is for controlling the information transmission of the subframe n on other descending carriers beyond this descending carrier or the information transmission for the subframe n+k that controls up-link carrier, and k wherein determines according to uplink and downlink time slot proportion.
6. method according to claim 1, is characterized in that, the method also comprises:
When descending carrier is activated, the descending carrier of this base station self is issued described UE relative to the timing offset of reference carrier by base station.
7. a base station equipment, is characterized in that, this base station equipment comprises time block and sending module;
Described time block, during for sending data in base station by plural descending carrier, with one of them descending carrier for reference carrier, according to the position of UE relative to this base station equipment, determine the timing offset of descending carrier relative to this reference carrier of base station equipment, to determine the timing relationship of plural descending carrier;
Described sending module, for according to the descending carrier of this base station equipment self timing offset relative to described reference carrier, adjust the time sending data to this UE, when making to send downlink data by plural descending carrier to UE according to this timing relationship, the downlink data in same subframe can be made almost to arrive UE simultaneously.
8. base station equipment according to claim 7, is characterized in that,
Described time block, deducts described timing offset by the uplink timing advance TA value of reference carrier, acquired results is defined as the uplink timing advance TA value of corresponding carriers, and the uplink timing advance TA value of each carrier wave is issued UE.
9. base station equipment according to claim 7, is characterized in that,
Described time block, the uplink timing advance TA value of reference carrier and other descending carriers are issued UE relative to the timing offset of this reference carrier, wherein, the uplink timing advance TA value of reference carrier is deducted described timing offset by described UE, acquired results is defined as the uplink timing advance TA value of corresponding carriers.
10. base station equipment according to claim 7, is characterized in that,
Described time block, for the synchronizing signal according to each descending carrier, determine the numbering of each subframe in the initial time of the radio frames of this descending carrier and radio frames, according to the uplink and downlink time slot proportion of each carrier wave, determine the numbering of each subframe in the initial time of the radio frames of up-link carrier and radio frames;
Described sending module, for bear control information on the subframe n of descending carrier, this control information is for controlling the information transmission of the subframe n on other descending carriers beyond this descending carrier or the information transmission for the subframe n+k that controls up-link carrier, and k wherein determines according to uplink and downlink time slot proportion.
11. base station equipments according to claim 7, is characterized in that,
Described sending module, for when descending carrier is activated, issues described UE by the descending carrier of this base station self relative to the timing offset of reference carrier.
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| CN201110213972.5A CN102905361B (en) | 2011-07-28 | 2011-07-28 | Timing method and device under multi-carrier situation |
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|---|---|---|---|
| CN201110213972.5A CN102905361B (en) | 2011-07-28 | 2011-07-28 | Timing method and device under multi-carrier situation |
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| CN102905361B true CN102905361B (en) | 2015-06-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104080159B (en) * | 2013-03-26 | 2017-08-11 | 中兴通讯股份有限公司 | Carrier wave sends time setting method and communication system |
| WO2017028754A1 (en) * | 2015-08-17 | 2017-02-23 | 华为技术有限公司 | Carrier aggregation method and device |
| WO2018137574A1 (en) * | 2017-01-26 | 2018-08-02 | 华为技术有限公司 | Method of transmitting carrier information, base station, and terminal |
| CN108366030B (en) | 2017-01-26 | 2022-09-02 | 华为技术有限公司 | Method, base station and terminal for sending carrier information |
| CN110572877B (en) * | 2017-11-17 | 2020-11-10 | 华为技术有限公司 | Method and device for sending and receiving information |
| EP3793270B1 (en) | 2018-05-11 | 2022-10-12 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Relay system synchronization method and apparatus, and computer device and storage medium |
| CN109714829B (en) * | 2019-01-07 | 2020-08-14 | 腾讯科技（深圳）有限公司 | Transmission processing method, device, equipment and storage medium |
| CN117156574A (en) * | 2022-05-20 | 2023-12-01 | 中兴通讯股份有限公司 | Communication method, base station side device, network device, and storage medium |
| CN116155466B (en) * | 2023-01-17 | 2023-10-27 | 南京星思半导体有限公司 | Timing method and device for multi-carrier transmission and user equipment |
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| CN1366431A (en) * | 2001-01-19 | 2002-08-28 | 株式会社日立制作所 | Determination method of timing deviation of ratio base station transmission and deviation determination apparatus |
| CN101204050A (en) * | 2005-04-28 | 2008-06-18 | 高通股份有限公司 | Multi-carrier operation in data transmission systems |
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| CN102118801A (en) * | 2011-03-31 | 2011-07-06 | 电信科学技术研究院 | Method and device for unlink transmission in multicarrier aggregation system |
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|---|---|---|---|---|
| CN1366431A (en) * | 2001-01-19 | 2002-08-28 | 株式会社日立制作所 | Determination method of timing deviation of ratio base station transmission and deviation determination apparatus |
| CN101204050A (en) * | 2005-04-28 | 2008-06-18 | 高通股份有限公司 | Multi-carrier operation in data transmission systems |
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