CN102457857A - Method for selecting resident sub-band and base station - Google Patents
Method for selecting resident sub-band and base station Download PDFInfo
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- CN102457857A CN102457857A CN2010105195741A CN201010519574A CN102457857A CN 102457857 A CN102457857 A CN 102457857A CN 2010105195741 A CN2010105195741 A CN 2010105195741A CN 201010519574 A CN201010519574 A CN 201010519574A CN 102457857 A CN102457857 A CN 102457857A
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Abstract
The invention provides a method for selecting a resident sub-band and a base station. The method comprises the following steps: the base station receives a message 1 from UE, the message 1 comprises a lead code, and through sending information of physical random access channel (PRACH) resource of the lead code, the base station determines a cluster at which the UE is located and a common sub-band to which the UE jump; the base station selects a idle common sub-band with a smallest interval with the common sub-band to which the UE jump as the resident sub-band of the UE, and feeds back information of the resident sub-band to the UE. According to the method and the base station in the invention, system performance is raised.
Description
Technical field
The present invention relates to technical field TD-SCDMA Long Term Evolution (TD-LTE) technology, relate in particular to a kind of method and base station of selecting resident subband.
Background technology
The TD-LTE technology is a wide-band mobile communication wireless access technology of future generation, and aloft the interface aspect adopts OFDM to substitute CDMA as multiple access technology, and has adopted the MIMO technology to improve data transfer rate in a large number.Aspect the network architecture, LTE has cancelled the RNC node of long-term employing, replaces brand-new flat structure, has characteristics such as high spectrum utilization, high data rate.
In the broadband trunked communication system based on the TD-LTE technology, system is divided into a plurality of continuous or discrete subbands with available bandwidth, adopts the orthogonal frequency division multiplexi transmission on each subband.System can be synchronous subband and common subband with sub-band division according to function, and all sub-band division are a plurality of bunches, comprises 1 synchronous subband and several common subbands in each bunch.As Fig. 1 be in the trunked communication system of existing broadband bunch with the division instance of subband, Fig. 1 shows 3 bunches, wherein, first bunch comprises that 15 subbands, second bunch comprise that 10 subbands, the 3rd bunch comprise 15 subbands; All comprise 1 synchronous subband (latticed subband is synchronous subband among Fig. 1) in each bunch, all the other subbands are common subband (Fig. 1 empty shape subband is common subband).The subband major function is the synchronous and broadcast channel of up-downgoing synchronously; Allow the user to insert at random; UE is sending the request that inserts at random on the subband synchronously, jumps to and insert at random the accidental access response that receives the base station transmission on the corresponding common subband of leading (Preamble) sign indicating number in the request then; Common subband is used for the transmission of regular traffic.
In the broadband trunked communication system based on the TD-LTE technology, in order to reduce cost and implementation complexity, UE can support list band mode of operation, and the bandwidth of UE needs not to be the whole system bandwidth, and UE supports to receive single subband needn't receive whole subbands.Like this, can reduce the requirement to the UE bandwidth, the minimizing system is to the demand of hardware capabilities.
In the broadband trunked communication system of supporting list band mode of operation, the selection of the resident subband of UE is accomplished in random access procedure.In the system all subbands are carried out serial number, UE sends the request that inserts at random on the synchronous subband at oneself place bunch, i.e. message 1 (Msg1), and Msg1 comprises the Preamble sign indicating number; Afterwards, UE jumps on the corresponding common subband of Physical Random Access Channel (PRACH) resource information of sending this Preamble sign indicating number and receives the accidental access response that send the base station, i.e. message 2 (Msg2); Simultaneously, after the base station receives the Msg1 of UE transmission, be that this UE selects the resident subband of a common subband as this UE, and should be carried in the uplink authorization information (UL Grant) by resident sub-band information, be sent to UE through Msg2; After UE receives Msg2, in Msg2, send the 3rd message (Msg3) of random access procedure on the indicated resident subband of UL Grant, and carrying out the transmission of signaling and data at this resident subband inserting the back at random, the completion subband is resident.
In the prior LTE system; The division characteristics with subband are not considered in the trunked communication system of broadband bunch in the base station when selecting resident subband for UE; And the factor of UE limited ability, thereby the resource allocation methods that adopts is not considered the subband adjustment interval problem of UE; And in the trunked communication system of broadband; System is divided into several continuous or discrete subbands with bandwidth; And all sub-band division are a plurality of bunches; Comprise in each bunch and 1 synchronous subband and several common subbands in this system, still adopt the existing resources distribution method that the interval is excessive between the common subband that can to cause the base station be the resident subband selected of UE jumps to UE; Make UE in follow-up subband adjustment process owing to excessive intersubband at a distance from the frequency deviation that causes frequency adjustment to bring, reduce the performance of system.
Summary of the invention
The invention provides a kind of method of selecting resident subband, can reduce the frequency deviation that the frequency adjustment brings, improve systematic function.
The present invention also provides a kind of base station of selecting resident subband, can reduce the frequency deviation that the frequency adjustment brings, and improves systematic function.
Technical scheme of the present invention is achieved in that
A kind of method of selecting resident subband comprises:
The base station receives the message 1 from UE, and said message 1 comprises lead code, and the information of the PRACH resource of base station through sending said lead code is confirmed bunch common subband that jumps to UE at said UE place;
The common intersubband that base station selected and said UE jumps to is at a distance from the resident subband of minimum and idle common subband as said UE, with the feedback information of said resident subband to UE.
A kind of base station comprises: receiving element, selected cell and transmitting element; Wherein,
Said receiving element is used to receive the message 1 from UE, and said message 1 comprises lead code, and the information of the PRACH resource through sending said lead code is confirmed bunch common subband that jumps to UE at said UE place;
Selected cell, the common intersubband that is used to select to jump to said UE is at a distance from the resident subband of minimum and idle common subband as said UE;
Said transmitting element, the feedback information of the resident subband that is used for said selected cell is selected is to UE.
It is thus clear that; The method and the base station of the resident subband of selection that the present invention proposes, after the base station received the Msg1 from UE, the common intersubband of selecting to jump to UE was at a distance from the resident subband of minimum and idle common subband as this UE; And resident sub-band information fed back to this UE; Make the intersubband of UE in follow-up subband adjustment process at a distance from as far as possible little, thereby can reduce the frequency deviation that the frequency adjustment brings, improve systematic function.
Description of drawings
Fig. 1 be in the trunked communication system of existing broadband bunch with the division instance of subband;
Fig. 2 is the method flow diagram of the resident subband of selection of the present invention's proposition;
Fig. 3 selects the method flow diagram of resident subband for the embodiment of the invention;
Fig. 4 is the structural representation of the base station of the present invention's proposition.
Embodiment
The present invention proposes a kind of method of selecting resident subband, and like the method flow diagram of Fig. 2 for the resident subband of selection of the present invention's proposition, this method may further comprise the steps:
Step 201: the base station receives the Msg1 that UE sends, and said Msg1 comprises the Preamble sign indicating number, and the information of the PRACH resource of base station through sending said Preamble sign indicating number is confirmed bunch common subband that jumps to UE at said UE place;
Step 202: the common intersubband that base station selected and said UE jumps to feeds back to UE at a distance from the resident subband of minimum and idle common subband as said UE with said resident sub-band information.
Below lifting concrete embodiment introduces in detail.
Select the method flow diagram of resident subband like Fig. 3 for the embodiment of the invention, may further comprise the steps:
After step 301:UE accomplished Cell searching, that selects oneself to belong to bunch inserted at random.UE sends Msg1 on the synchronous subband at oneself place bunch, said Msg1 comprises the Preamble sign indicating number, can determine bunch common subband that jumps to UE at said UE place through the PRACH resource information of sending said Preamble sign indicating number; Here, the common subband that UE jumps to is meant that UE has sent the subband that is jumped to after the Msg1, and UE will receive the Msg2 that send the base station on this common subband.
Step 302:UE jumps to the corresponding common subband of PRACH resource information that sends this Preamble sign indicating number, prepares on this common subband, to receive Msg2.
Step 303: bunch common subband that jumps to UE at UE place is confirmed in the base station according to the PRACH resource information of sending this Preamble sign indicating number.
Step 304: base station judges UE place bunch whether have the free time, if then execution in step 305; Otherwise execution in step 308.
Whether the common subband that step 305: base station judges UE jumps to is idle, if idle, then execution in step 306; Otherwise execution in step 307.
Step 306: the common subband that base station selected UE jumps to continues execution in step 310 as the resident subband of this UE.
Step 307: base station selected UE place bunch in the common intersubband that jumps to UE at a distance from the resident subband of minimum and idle common subband as this UE, continue execution in step 310.
Step 308: whether base station judges exists and bunch interval at UE place little and idle close on bunch of trying one's best, if exist, then continues execution in step 309; Otherwise, access failure at random, the base station is to this UE feedback Msg2.
Step 309: the common intersubband that the base station is selected to jump to this UE in this closes on bunch continues execution in step 310 at a distance from the resident subband of minimum and idle common subband as this UE.
Step 310: the base station writes resident sub-band information among the UL Grant, is sent to this UE through Msg2.
It is resident that step 311:UE carries out subband according to the resident sub-band information that carries among this UL Grant.
Through said process, the base station is that the resident subband that UE selects can be approaching as much as possible with the common subband that UE jumps to, thereby reduces the frequency deviation of UE in the subsequent subband adjustment process, improves systematic function.
The present invention also proposes a kind of base station, can select suitable resident subband for UE, reduces the frequency deviation of UE in the subband adjustment process, improves systematic function.Like the structural representation of Fig. 4, comprising: receiving element 401, selected cell 402 and transmitting element 403 for the base station of the present invention's proposition; Wherein,
Receiving element 401 is used to receive the message 1 from UE, and said message 1 comprises lead code, and the information of the PRACH resource through sending said lead code is confirmed bunch common subband that jumps to UE at said UE place;
Selected cell 402, the common intersubband that is used to select to jump to said UE is at a distance from the resident subband of minimum and idle common subband as said UE;
Transmitting element 403, the feedback information of the resident subband that is used for said selected cell 402 is selected is to UE.
Above-mentioned selected cell 402 specifically can be used for:
A, judge UE place bunch whether have the free time, if exist, execution in step B then, otherwise execution in step C;
B, judge whether the common subband that UE jumps to is idle,, then select common subband that said UE jumps to as resident subband if idle; If not idle, then select UE place bunch in the common intersubband that jumps to said UE at a distance from minimum and idle common subband as resident subband;
C, search with the bunch minimum at interval of said UE place and have idle close on bunch, the common intersubband of selecting to jump to said UE in said close on bunch at a distance from minimum and idle common subband as resident subband.
Above-mentioned transmitting element 403 specifically can be used for, and the information of the resident subband that selected cell 402 is selected is carried in the uplink authorization information, feeds back to UE through message 2.
To sum up visible; The method and the base station of the resident subband of selection that the present invention proposes; The common intersubband that can select to jump to for UE with UE at a distance from minimum and idle common subband as its resident subband; To reduce the intersubband that UE need adjust separated as far as possible, thereby reduce the frequency deviation that the frequency adjustment brings, and improves systematic function.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope that the present invention protects.
Claims (7)
1. method of selecting resident subband is characterized in that said method comprises:
The base station receives the message 1 from UE, and said message 1 comprises lead code, and the information of the Physical Random Access Channel PRACH resource of base station through sending said lead code is confirmed bunch common subband that jumps to UE at said UE place;
The common intersubband that base station selected and said UE jumps to is at a distance from the resident subband of minimum and idle common subband as said UE, with the feedback information of said resident subband to UE.
2. method according to claim 1 is characterized in that, the common intersubband that said base station selected and UE jump at a distance from minimum and idle common subband as the mode of the resident subband of UE is:
A, judge UE place bunch whether have the free time, if exist, execution in step B then, otherwise execution in step C;
B, judge whether the common subband that UE jumps to is idle,, then select common subband that said UE jumps to as resident subband if idle; If not idle, then select UE place bunch in the common intersubband that jumps to said UE at a distance from minimum and idle common subband as resident subband;
C, search with the bunch minimum at interval of said UE place and have idle close on bunch, the common intersubband of selecting to jump to said UE in said close on bunch at a distance from minimum and idle common subband as resident subband.
3. method according to claim 1 and 2 is characterized in that, said base station with the feedback information of resident subband to the mode of UE is:
The base station is carried at the information of said resident subband in the uplink authorization information, feeds back to UE through message 2.
4. method according to claim 1 and 2 is characterized in that, said base station further comprises the feedback information of resident subband to UE: it is resident that UE carries out subband according to said information.
5. a base station is characterized in that, said base station comprises: receiving element, selected cell and transmitting element; Wherein,
Said receiving element is used to receive the message 1 from UE, and said message 1 comprises lead code, and the information of the Physical Random Access Channel PRACH resource through sending said lead code is confirmed bunch common subband that jumps to UE at said UE place;
Selected cell, the common intersubband that is used to select to jump to said UE is at a distance from the resident subband of minimum and idle common subband as said UE;
Said transmitting element, the feedback information of the resident subband that is used for said selected cell is selected is to UE.
6. base station according to claim 5 is characterized in that, said selected cell is used for:
A, judge UE place bunch whether have the free time, if exist, execution in step B then, otherwise execution in step C;
B, judge whether the common subband that UE jumps to is idle,, then select common subband that said UE jumps to as resident subband if idle; If not idle, then select UE place bunch in the common intersubband that jumps to said UE at a distance from minimum and idle common subband as resident subband;
C, search with the bunch minimum at interval of said UE place and have idle close on bunch, the common intersubband of selecting to jump to said UE in said close on bunch at a distance from minimum and idle common subband as resident subband.
7. according to claim 5 or 6 described base stations, it is characterized in that said transmitting element is used for, the information of the resident subband that selected cell is selected is carried in the uplink authorization information, feeds back to UE through message 2.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010519574.1A CN102457857B (en) | 2010-10-19 | 2010-10-19 | Method for selecting resident sub-band and base station |
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| CN201010519574.1A CN102457857B (en) | 2010-10-19 | 2010-10-19 | Method for selecting resident sub-band and base station |
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| CN102457857A true CN102457857A (en) | 2012-05-16 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104378830A (en) * | 2013-08-15 | 2015-02-25 | 普天信息技术有限公司 | Distribution method and system of scheduling request resources |
| CN107277851A (en) * | 2016-04-07 | 2017-10-20 | 诺基亚通信公司 | Strengthen frequency selection |
| CN108738134A (en) * | 2017-04-13 | 2018-11-02 | 普天信息技术有限公司 | A kind of time division multiplexing random access resource selection method |
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| US20040081123A1 (en) * | 2002-10-29 | 2004-04-29 | Ranganathan Krishnan | Uplink pilot and signaling transmission in wireless communication systems |
| CN1957622A (en) * | 2003-08-22 | 2007-05-02 | Act科技有限责任公司 | Wireless systems, methods and devices employing forward- and/or return-link carriers having different numbers of sub-band carriers |
| CN101521889A (en) * | 2008-02-26 | 2009-09-02 | 华为技术有限公司 | Method and system for high bandwidth system communication channel design |
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- 2010-10-19 CN CN201010519574.1A patent/CN102457857B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040081123A1 (en) * | 2002-10-29 | 2004-04-29 | Ranganathan Krishnan | Uplink pilot and signaling transmission in wireless communication systems |
| CN1957622A (en) * | 2003-08-22 | 2007-05-02 | Act科技有限责任公司 | Wireless systems, methods and devices employing forward- and/or return-link carriers having different numbers of sub-band carriers |
| CN101521889A (en) * | 2008-02-26 | 2009-09-02 | 华为技术有限公司 | Method and system for high bandwidth system communication channel design |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104378830A (en) * | 2013-08-15 | 2015-02-25 | 普天信息技术有限公司 | Distribution method and system of scheduling request resources |
| CN104378830B (en) * | 2013-08-15 | 2018-07-20 | 普天信息技术有限公司 | The distribution method and system of scheduling request resources |
| CN107277851A (en) * | 2016-04-07 | 2017-10-20 | 诺基亚通信公司 | Strengthen frequency selection |
| CN107277851B (en) * | 2016-04-07 | 2020-09-22 | 诺基亚通信公司 | Enhanced frequency selection |
| US10939434B2 (en) | 2016-04-07 | 2021-03-02 | Nokia Solutions And Networks Oy | Enhanced frequency selection |
| CN108738134A (en) * | 2017-04-13 | 2018-11-02 | 普天信息技术有限公司 | A kind of time division multiplexing random access resource selection method |
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| CN102457857B (en) | 2014-04-02 |
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