CN108737056A - TA under a kind of polymerization of lte-a system carrier wave determines method - Google Patents
TA under a kind of polymerization of lte-a system carrier wave determines method Download PDFInfo
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- CN108737056A CN108737056A CN201810385609.3A CN201810385609A CN108737056A CN 108737056 A CN108737056 A CN 108737056A CN 201810385609 A CN201810385609 A CN 201810385609A CN 108737056 A CN108737056 A CN 108737056A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
Abstract
The TA that the present invention proposes under a kind of polymerization of lte-a system carrier wave determines method, it is characterised in that：Under carrier wave polymerization, for covering scene, configured according to the corresponding carrier waves of UE, each configuration carrier wave all measures the TA values of UE, the TA of UE is reported to main carrier by each configuration carrier wave, main carrier handles multiple TA values that each carrier wave measures, includes the occupation condition according to UE according to the resource service condition of UE, get rid of useless TA values, compromise to useful TA values, the TA adjusted values for obtaining being most suitable for UE are handed down to UE, realize and ensure to improve upstream performance.The present invention, according to the occupation condition of UE, can determine more suitably TA values, to improve UE uplink reliabilities under carrier aggregation scene.
Description
Technical field
The present invention relates to wireless communication technology fields, more particularly it relates under a kind of polymerization of lte-a system carrier wave
TA determine method.
Background technology
In LTE system, eNodeB can be by DMRS or SRS that fixed time test UE is sent, to obtain TA.TA is to use
The parameter of the timing offset of data transmitted by UE is received in characterization eNodeB.Closing for uplink synchronous is kept between UE and eNodeB
Ring process is：ENodeB obtains TA according to measurement, then TA adjustment orders are handed down to UE by PDSCH, and UE is according to receiving
TA is adjusted, to keep the uplink synchronous of UE and eNodeB.
In lte-a system, keep the principle of uplink synchronous identical between UE and eNodeB, if each UE only occupies one
The resource of a cell, i.e. resource on a carrier wave, the determination method of TA can be identical with LTE.But under carrier wave polymerization,
One UE can occupy the resource of multiple carrier waves, and only there are one corresponding TA by each UE of agreement regulation.In this way in same covering field
Under scape, eNodeB sends main carrier corresponding TA, UE to UE and carries out uplink synchronous not with all carrier waves according to the TA of a carrier wave
There can be problem.But under the scene of different coverings, UE needs the TA values used that should have differences from different carrier synchronizations,
If only the corresponding TA of a carrier wave keeps UE and all carrier synchronizations to have problem.
Current existing invention focuses primarily upon the scheme for how issuing multiple TA to UE, is more likely to repair agreement
Change, there are no the solution to the problem is directed under R10 agreement frameworks.
Associative key is as follows：
Invention content
Present invention solves the technical problem that being, under carrier wave polymerization, eNodeB can measure the TA values of multiple carrier waves, but
It is that can only issue 1 TA adjustment amount to UE, the TA adjustment orders for being handed down to UE how is determined, to ensure UE on each carrier wave
Upstream performance.
The technical solution adopted in the present invention is that the TA under a kind of polymerization of lte-a system carrier wave determines method, poly- in carrier wave
Under conjunction, for covering scene, configured according to the corresponding carrier waves of UE, each configuration carrier wave all measures the TA values of UE, respectively
The TA of UE is reported to main carrier by configuration carrier wave, and main carrier measures each carrier wave more according to the resource service condition of UE
A TA values are handled, and include the occupation condition according to UE, get rid of useless TA values, are rolled over to useful TA values
In, the TA adjusted values for obtaining being most suitable for UE are handed down to UE, realize and ensure to improve upstream performance.
Moreover, it is T1, T2 ..., TN that each carrier wave UE, which is arranged, not occupy Resource Counter continuously, wherein N is UE configurations
Carrier number retains when certain counter meets condition using the corresponding TA values of the carrier wave as useful TA values.
Moreover, if when no counter meets condition, determine that the TA values of UE are finally the correspondence TA that main carrier measures.
Moreover, certain counter meets condition, refer to being less than preset threshold T th.
Moreover, main carrier after each TTI dispatches UE, counts occupation conditions of the UE on all carrier waves, if
UE is on carrier wave CCj both without occupying uplink or without occupying downlink resource, then counter Tj being set to Tj+1, if UE is being carried
Ascending resource or downlink resource are occupied on wave CCj, then Tj are set to 0, wherein j=1,2 ..., N.
Moreover, described compromise to useful TA values, it is to be averaged.
The present invention proposes a solution, under carrier wave polymerization, for covering scene, is matched according to the corresponding carrier waves of UE
It sets, each configuration carrier wave all measures the TA values of UE, and the TA of UE is reported to main carrier, main carrier root by each carrier wave that configures
According to the resource service condition of UE, multiple TA values that each carrier wave measures are handled, obtain the TA adjusted values for being most suitable for UE
It is handed down to UE, to ensure to improve upstream performance.
The present invention key innovations be：
1. the corresponding TA of UE that each carrier wave measures uniformly are reported to main carrier, focused on by main carrier；
2. according to the occupation condition of UE, useless TA values are got rid of so that determining TA values are more suitable for UE；
3. a pair multiple useful TA values are compromised, finally to determine the TA adjustment amounts for being handed down to UE, UE can guarantee in this way
Uplink reliability over a number of carriers.
Description of the drawings
Fig. 1 is the flow diagram of the embodiment of the present invention.
Specific implementation mode
Illustrate technical solution of the present invention below in conjunction with drawings and examples.
The present invention proposes, on the multiple carrier waves configured for UE, all carries out TA measurements, the corresponding TA values of each carrier wave are reported
To main carrier, main carrier is handled the multiple TA values measured further according to the resource service condition of UE, obtains being most suitable for UE
TA adjusted values be handed down to UE.
The embodiment of the present invention, for covering scene, configures, each configuration is carried under carrier wave polymerization according to the corresponding carrier waves of UE
Wave all measures the TA values of UE, and the TA of UE is reported to main carrier by each carrier wave that configures, and main carrier makes according to the resource of UE
With situation, multiple TA values that each carrier wave measures are handled, includes the occupation condition according to UE, gets rid of useless
TA values, compromise to useful TA values, the TA adjusted values for obtaining being most suitable for UE are handed down to UE, realize that ensureing to improve uplink passes
Defeated performance.
Embodiment is realized using following below scheme：
Step 1, main carrier determine：The carrier set for being set as each resident UE configuration is respectively CC1, CC2 ..., CCn is (silent
It is main carrier to recognize CC1, other are secondary carrier), the corresponding TA values of each carrier wave are TA1, TA2 ..., TAn and each carrier wave UE
The continuous Resource Counter that do not occupy is T1, T2 ..., TN, and wherein N is the carrier number of UE configurations, the corresponding TA values of each carrier wave
TA1, TA2 ..., TAn initial values are all set to TAinit, and TAinit is parameter preset, and when specific implementation can be set to 0；Continuously not
It occupies Resource Counter T1, T2 ..., TN initial value and is all set to 0, corresponding threshold value is Tth, it is proposed that value range arrives for 0
1282。
Step 2, main carrier is after each TTI dispatches UE, occupation conditions of the statistics UE on all carrier waves, such as
Fruit UE is on carrier wave CCj both without occupying uplink or without occupying downlink resource, then counter Tj being set to Tj+1, if UE exists
Ascending resource or downlink resource are occupied on carrier wave CCj, then Tj are set to 0, wherein j=1,2 ..., N；
In the standard of 3GPP LTE and LTE-A, it is considered that 1TTI=1ms is wireless resource management (scheduling etc.) institute
Administer the base unit of time.
Step 3, each secondary carrier CCi measure TAi according to UE corresponding DMRS or SRS, when measuring correspondence
TAi when, be reported to main carrier, main carrier to be updated to TAi according to the result received corresponding TAi values, wherein i is
2 arrive the integer of n, while main carrier CC1 measures corresponding TA1, then is updated to TA1.
When it is implemented, step 2 and step 3 can be two independent process, do not have stringent preposition sexual intercourse.
Step 4, main carrier handle the multiple TA values measured, obtain most suitable according to the resource service condition of UE
The TA adjusted values for closing UE are handed down to UE, including carry out following sub-step,
A it is the integer that initial value is 1) to enable n,
B) according to the corresponding counter Tn of UE, if Tn<TAn is then put into set U, n++ by Tth, otherwise direct n++；
C) if n>N enters step D), otherwise return to step B)；
D) if set U is sky, it is determined that the TA values of UE are finally TA1, if set U is not sky, it is determined that the TA of UE
Value is finally averaged for all TA values in set U.Value, which is equivalent to, in this way rolls over the TA values calculated on all carrier waves
In, the value taken out in this way is more suitable for the corresponding all carrier waves of set U compared to some Ta value is directly selected.
E) according to D) TA that determines generates corresponding TA adjustment order, UE is handed down to by main carrier.
The present invention removes useless TA values, by the corresponding continuous vacant Resource Counter of each carrier wave, if a certain
The corresponding counter of a carrier wave reaches thresholding, indicates the UE corresponding resources of the vacant carrier wave for a long time, can be by the carrier wave pair
The TA values answered are removed.
For example, under carrier wave not covering scene, the carrier number of 1 UE configurations is 3, wherein coverage area it is maximum based on
Carrier wave, other two covers small for secondary carrier.
On 3 carrier waves configured for UE, TA measurements are all carried out, the corresponding TA values of each carrier wave are reported to main carrier, it is main
Carrier wave is handled the multiple TA values measured further according to the resource service condition of UE, obtains the TA adjusted values for being most suitable for UE
It is handed down to UE.
It is as follows：
Step 1：Main carrier is determined as the carrier set CC1, CC2, CC3 (CC1 is main carrier) of each resident UE configurations,
Each carrier wave corresponding TA values TA1, TA2, TA3 and each carrier wave UE does not occupy Resource Counter T1, T2, T3 continuously, each
The corresponding TA initial values of carrier wave are all set to TAinit, and continuous vacant Resource Counter initial value is all set to 0, threshold value Tth；
Step 2：Main carrier is after each TTI dispatches UE, occupation conditions of the statistics UE on all carrier waves, such as
Fruit UE is on carrier wave CCj both without occupying uplink or without occupying downlink resource, then counter Tj being set to Tj+1, if UE exists
Ascending resource or downlink resource are occupied on carrier wave CCj, then Tj are set to 0, wherein j=1 to 3；
Step 3：Secondary carrier CCi measures TAi according to UE corresponding DMRS or SRS, corresponding when measuring
When TAi, main carrier, main carrier is reported to be updated to TAi according to the result received corresponding TAi values, wherein i is 2
To 3 integer, main carrier CC1 measures corresponding TA1, is then updated to TA1, enters step four；
Pay attention to：Step 2 and step 3 are two independent process, do not have stringent preposition sexual intercourse.
Following n is the integer that initial value is 1
Step 4：The corresponding counter Tn of UE, if Tn<TAn is then put into set U, n++, otherwise n++, such as by Tth
Fruit n>3 enter step five, otherwise repeatedly step 4；
Step 5：If set U is sky, it is determined that the TA values of UE are TA1, if set U is not sky, the TA values of UE are
All TA values are averaged in set U.
Step 6：Corresponding TA adjustment order is determined according to TA, and UE is handed down to by main carrier.
When it is implemented, computer software flow, which can be used, in technical scheme of the present invention realizes automatic running.
The above content is combining, specific embodiment is made for the present invention to be further described, and it cannot be said that this hair
Bright specific implementation is confined to these explanations.For those of ordinary skill in the art to which the present invention belongs, it is not taking off
Under the premise of from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to the protection of the present invention
Range.
Claims (6)
1. the TA under a kind of lte-a system carrier wave polymerization determines method, it is characterised in that：Under carrier wave polymerization, for covering field
Scape is configured according to the corresponding carrier waves of UE, and each configuration carrier wave all measures the TA values of UE, and each carrier wave that configures is by the TA of UE
It is reported to main carrier, main carrier is handled multiple TA values that each carrier wave measures according to the resource service condition of UE, packet
The occupation condition according to UE is included, useless TA values are got rid of, is compromised to useful TA values, the TA for being most suitable for UE is obtained
Adjusted value is handed down to UE, realizes and ensures to improve upstream performance.
2. the TA under the polymerization of lte-a system carrier wave determines method according to claim 1, it is characterised in that：Each load is set
It is T1, T2 ..., TN that wave UE, which does not occupy Resource Counter continuously, and wherein N is the carrier number of UE configurations, when certain counter meets item
When part, retain the corresponding TA values of the carrier wave as useful TA values.
3. the TA under the polymerization of lte-a system carrier wave determines method according to claim 2, it is characterised in that：If do not counted
When number device meets condition, determine that the TA values of UE are finally the correspondence TA that main carrier measures.
4. the TA under the polymerization of lte-a system carrier wave determines method according to claim 2, it is characterised in that：Certain counter is full
Sufficient condition refers to being less than preset threshold T th.
5. the TA under the polymerization of lte-a system carrier wave determines method according to claim 2, it is characterised in that：Main carrier is every
After a TTI scheduling UE, occupation conditions of the statistics UE on all carrier waves, if UE was not both occupied on carrier wave CCj
Uplink also without occupy downlink resource, then counter Tj is set to Tj+1, if UE occupied on carrier wave CCj ascending resource or
Tj is then set to 0, wherein j=1,2 ..., N by person's downlink resource.
6. determining that method, feature exist according to the TA under claims 1 or 2 or the 3 or 4 or 5 lte-a system carrier wave polymerizations
In：It is described to compromise to useful TA values, it is to be averaged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810385609.3A CN108737056B (en) | 2018-04-26 | 2018-04-26 | TA (timing advance) determination method under carrier aggregation of LTE-A (Long term evolution-advanced) system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810385609.3A CN108737056B (en) | 2018-04-26 | 2018-04-26 | TA (timing advance) determination method under carrier aggregation of LTE-A (Long term evolution-advanced) system |
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| Publication Number | Publication Date |
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| CN108737056A true CN108737056A (en) | 2018-11-02 |
| CN108737056B CN108737056B (en) | 2021-02-19 |
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| CN201810385609.3A Active CN108737056B (en) | 2018-04-26 | 2018-04-26 | TA (timing advance) determination method under carrier aggregation of LTE-A (Long term evolution-advanced) system |
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|---|---|---|---|---|
| CN101296487A (en) * | 2007-04-28 | 2008-10-29 | 中兴通讯股份有限公司 | Uplink Synchronization method for mobile communication system |
| CN101888648A (en) * | 2009-05-11 | 2010-11-17 | 大唐移动通信设备有限公司 | Uplink synchronous control method and device |
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