CN101547395B - Method for sharding management messages on distance measuring connection - Google Patents
Method for sharding management messages on distance measuring connection Download PDFInfo
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- CN101547395B CN101547395B CN2008100662355A CN200810066235A CN101547395B CN 101547395 B CN101547395 B CN 101547395B CN 2008100662355 A CN2008100662355 A CN 2008100662355A CN 200810066235 A CN200810066235 A CN 200810066235A CN 101547395 B CN101547395 B CN 101547395B
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Abstract
The invention discloses a method for sharding management messages on distance measuring connection, which comprises that: a, a terminal receives a distance measuring response sent by a base station, and when the distance measuring response instructs that the management messages need sharding, the next step is started; b, the terminal sends the management message sharding which is not sent to the base station according to bandwidth information in the distance measuring response, and the base station caches the management message sharding; and c, the base station judges whether the management messages can be recombined or not currently, if so, the management messages are recombined, the bandwidth information is updated and the distance measuring response is returned to the terminal, otherwise, the bandwidth information is updated and returned to the terminal, and then the last step is returned. The technical proposal enlarges the reverse coverage of the terminal.
Description
Technical field
The present invention relates to a kind of method for sharding management messages, especially a kind of method for sharding management messages of finding range on connecting.
Background technology
In recent years, OFDM (Orthogonal Fre-quency Division Multiplexing, OFDM) technology is owing to can effectively disturb and narrow band interference anti-multipath, spectrum efficiency is high and become the mainstream technology of radio communication physical-layer techniques, OFDMA (OFDM) is in conjunction with MIMO (Multi Input Multi Output, multiple-input and multiple-output) CDMA (code division multiple access) technology that technology compared for the 3rd generation has natural technical advantage, be more suitable in wide-band mobile communication system, being known as is one of core technology of next generation mobile communication system.WiMAX (Worldwide Interoperability for Microwave Access, worldwide interoperability for microwave access), to adopt the OFDMA technology be the physical layer core technology and take into account mobility and the WiMAX 802.16e standard of broadband characteristics is the strong competitor of next generation mobile communication standard.
In the OFDMA system, on time domain, be divided into a plurality of OFDM symbols, on frequency domain, then be divided into a plurality of subchannels, each subchannel is the set of one group of subcarrier.The time-frequency region that a common subchannel and one or several symbol cross constitute is called time slot (Slot), is the allocation unit of OFDMA system minimum.So logically just the physical layer resources of OFDMA frame can be represented that with the two-dimensional rectangle form that time slot-subchannel constitutes a grid is exactly a time slot.For the physical layer resources of terminal distribution then is to be the Resource Block of unit with the time slot, generally be similar rectangular block (as IEEE 802.16e), this is a kind of T/F structure of two dimension.
T/F two dimension resource has been brought numerous benefits for the OFDMA system, and one of them distinctive advantage is that terminal oppositely has sub-channelizing gain, the reverse covering that can improve the OFDMA terminal.Fig. 2 is the reverse covering schematic diagram of certain terminal in the OFDMA system, as can be seen, along with terminal moves (direction shown in the arrow of Fig. 2) gradually from nearly base sites towards the edge, base station, the modulation system of terminal will experience from 64QAM (quadrature amplitude modulation) to 16QAM, again to QPSK (phase shift keying), add N to QPSK (Quadrature Phase Shift Keying) then
RepetitionThe variation of inferior repetition.When terminal moves to the QPSK zone boundary, this moment, the transmitting power of terminal will arrive maximum, if terminal continues outwards to move again, in order to satisfy reverse CINR (Carrier toInterference and Noise Ratio, carrier wave and interference-to-noise ratio) requirement, need to improve backward gain---promptly need to increase reverse covering.
When terminal is in the covering edge of base station, along with big with the change of the distance of base station, the reverse CINR that equal transmit power can reach will reduce.In cell edge, terminal will concentrate all power on a few subchannel, to satisfy the modulation demand of QPSK1/2.At this moment, because the administrative messag that range finding connects oppositely can not burst, for example distance measurement request message or basic capability negotiating request message, its number of subchannels that takies increases, make subchannel gains descend, data can't satisfy the demodulation demand of QPSK1/2, and terminal can't insert, and have promptly influenced the reverse coverage of terminal.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method for sharding management messages of finding range on connecting, and has enlarged the reverse coverage of terminal.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of method for sharding management messages of finding range on connecting may further comprise the steps:
A, terminal receive the ranging response that the base station sends, and when described ranging response indication administrative messag needs burst, enter next step;
The sharding management messages that b, described terminal will not send according to the bandwidth information in the described ranging response sends to described base station, the described sharding management messages of described base station buffer memory;
The current described administrative messag of recombinating is judged in c, described base station can, if can, the described administrative messag of then recombinating, upgrade described bandwidth information, and return ranging response to described terminal, otherwise, upgrade described bandwidth information and it is returned to described terminal, get back to previous step afterwards.
In the such scheme, among the described step a, when described ranging response indicates described administrative messag to need not burst, enter following steps:
I, described terminal send to described base station according to described bandwidth information with described administrative messag;
Described bandwidth information is upgraded in II, described base station, and returns ranging response to described terminal, finishes the sharding management messages flow process afterwards.
In the above-mentioned sharding management messages flow process, the foundation that described bandwidth allocation information is upgraded in described base station is to satisfy the maximum of the subchannel number of current reverse CINR demodulation demand.
In the such scheme, among the described step c, the current described administrative messag of recombinating is judged according to the type of described sharding management messages in described base station can, if the type of described sharding management messages indicates that it is last burst of described administrative messag, then described base station is current can be according to the described administrative messag of recombinating of the sharding management messages of buffer memory.
In the such scheme, among the described step b, described base station is for the first time before the described sharding management messages of buffer memory, also will set up the mapping relations between the spatial cache of all sharding management messages of described terminal and its transmission.
In the such scheme, mapping relations between described terminal and the described spatial cache are set up by following steps in described base station:
(1), sets up the index of described terminal;
(2), set up the array of the original position of all sharding management messages that the described terminal of buffer memory sends;
(3), set up mapping relations between described index and the described array.
In the such scheme, among the described step c, described base station returns to the index sign of the bandwidth information of described terminal by described terminal.
In the such scheme, described index is made up of ranging code and ranging code frame number that described terminal sends to described base station.
In the such scheme, described administrative messag is distance measurement request message, basic capability negotiating request message or basic the connection to go up the administrative messag that sends.
Beneficial effect of the present invention mainly shows: technical scheme provided by the invention allows will find range sharding management messages in the connection of terminal, in the base station limits bandwidth, the sharding management messages that the branch multiframe will be found range on connecting successfully sends to the base station, the mode success recovery management message of group bag is passed through in the base station, thereby has enlarged the reverse coverage of terminal.
Description of drawings
Fig. 1 is the reverse covering schematic diagram of certain terminal in the OFDMA system;
The method for sharding management messages flow chart that Fig. 2 connects for the present invention finds range;
Fig. 3 is the signaling process figure of distance measurement request message burst of the present invention.
Embodiment
The invention will be further described with reference to the accompanying drawings.
Fig. 1 is described in background technology, repeats no more herein.
With reference to Fig. 2, a kind of method for sharding management messages of finding range and connecting may further comprise the steps, and wherein, the administrative messag on range finding connects comprises that distance measurement request message, basic capability negotiating request message and all connect the administrative messag of transmission substantially:
S201: terminal receives the ranging response that the base station sends; The base station is after successfully receiving the ranging code RangingCode that terminal sends, return ranging response to terminal, whether comprise administrative messag in the ranging response needs the indication of burst, and give initial bandwidth of terminal distribution by CDMA-Allocation-IE, comprise RangingCode and ranging code frame number FrameNo among the CDMA-Allocation-IE;
S202: judge whether needs burst of administrative messag according to ranging response,, enter S204 if need burst, otherwise, enter S203;
S203: terminal sends to the base station with administrative messag, and enters S211 according to the bandwidth of CDMA-Allocation-IE indication;
S204: terminal sends to the base station according to the bandwidth of CDMA-Allocation-IE indication with the sharding management messages that does not send;
S205: after the base station receives sharding management messages, judge whether this sharding management messages is its first sharding management messages that receives, if, enter S206, otherwise, S207 entered;
S206: the mapping relations between the spatial cache of all sharding management messages of terminal and its transmission are set up in the base station; Specifically in the following manner:
At first, set up terminal index MSIndex, MSIndex is made up of RangingCode and the FrameNo that it sends to the base station, and the total length of MSIndex is 12bit, and wherein preceding 4bit is FrameNo, and back 8bit is RangingCode;
Secondly, set up the array StartOffset[of the original position of all sharding management messages of buffer memory terminal], deposit the original position of all sharding management messages of terminal successively;
At last, set up MSIndex and StartOffset[] between mapping relations, promptly just can find the original position of its sharding management messages in the buffer memory by MSIndex;
S207: the sharding management messages that the base station buffer memory receives;
S208: the base station judges whether the type of the sharding management messages that receives indicates that it is last burst of administrative messag, if, enter S210, otherwise, S209 entered;
S209: calculate in the maximum that satisfies the subchannel number under the basic demodulation ability according to current reverse CINR the base station, upgrades CDMA-Allocation-IE according to this maximum, and it is returned to terminal, gets back to S204 afterwards; Wherein, when the base station returns to terminal with CDMA-Allocation-IE, the index sign of CDMA-Allocation-IE by terminal that is to say that the RangingCode and the FrameNo that comprise among the CDMA-Allocation-IE among the RangingCode that comprises among the CDMA-Allocation-IE and FrameNo and the S201 are identical;
S210: the base station basis is the sharding management messages reorganization administrative messag of buffer memory; Promptly according to MSIndex and StartOffset[] between mapping relations, find all sharding management messages of terminal, and they reassembled into complete administrative messag;
S211: calculate in the maximum that satisfies the subchannel number under the basic demodulation ability according to current reverse CINR the base station, upgrades CDMA-Allocation-IE according to this maximum, and send ranging response to terminal; Terminal receives ranging response that the base station sends and indicates that promptly this administrative messag flow process finishes, and prepares to enter next message flow.
At up PUSC, (PUSC:Partial Usage of SubChannels uses the parton channel to TDD 2:1; TDD:Time Division Duplex, time division multiple access) under the situation, if the user prepares to initiate to insert in the zone of QPSK1/2, suppose that this moment is in order to satisfy the reverse CINR requirement of basic demodulation demand, need on the subchannel to send data with the power of 20dBm, terminal can only send data (the terminal maximum transmission power is 23dBm) with 2 subchannels at most so, otherwise can not satisfy reverse CINR demand, this moment, terminal sent distance measurement request message burst according to flow process shown in Figure 2 to the base station, and Fig. 3 has described the signaling process in this process.
The above is embodiments of the invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (9)
1. a method for sharding management messages of finding range on connecting is characterized in that, may further comprise the steps:
A, terminal receive the ranging response that the base station sends, and when described ranging response indication administrative messag needs burst, enter next step;
The sharding management messages that b, described terminal will not send according to the bandwidth information in the described ranging response sends to described base station, the described sharding management messages of described base station buffer memory;
The current described administrative messag of recombinating is judged in c, described base station can, if can, the described administrative messag of then recombinating, upgrade described bandwidth information, and return ranging response to described terminal, otherwise, upgrade described bandwidth information and it is returned to described terminal, get back to previous step afterwards.
2. the method for sharding management messages on range finding as claimed in claim 1 connects is characterized in that, among the described step a, when described ranging response indicates described administrative messag to need not burst, enters following steps:
I, described terminal send to described base station according to described bandwidth information with described administrative messag;
Described bandwidth information is upgraded in II, described base station, and returns ranging response to described terminal, finishes the sharding management messages flow process afterwards.
3. the method for sharding management messages on range finding as claimed in claim 1 or 2 connects, it is characterized in that: the foundation that described bandwidth information is upgraded in described base station is to satisfy the maximum of the subchannel number of current reverse carrier wave and interference-to-noise ratio demodulation demand.
4. the method for sharding management messages on range finding as claimed in claim 1 connects, it is characterized in that, among the described step c, the current described administrative messag of recombinating is judged according to the type of described sharding management messages in described base station can, if the type of described sharding management messages indicates that it is last burst of described administrative messag, then described base station is current can be according to the described administrative messag of recombinating of the sharding management messages of buffer memory.
5. the method for sharding management messages on range finding as claimed in claim 1 connects, it is characterized in that: among the described step b, described base station is for the first time before the described sharding management messages of buffer memory, also will set up the mapping relations between the spatial cache of all sharding management messages of described terminal and its transmission.
6. the method for sharding management messages on range finding as claimed in claim 5 connects is characterized in that, mapping relations between described terminal and the described spatial cache are set up by following steps in described base station:
(1), sets up the index of described terminal;
(2), set up the array of the original position of all sharding management messages that the described terminal of buffer memory sends;
(3), set up mapping relations between described index and the described array.
7. the method for sharding management messages on range finding as claimed in claim 6 connects is characterized in that: among the described step c, described base station returns to the index sign of the bandwidth information of described terminal by described terminal.
8. the method for sharding management messages on range finding as claimed in claim 7 connects, it is characterized in that: described index is made up of ranging code and ranging code frame number that described terminal sends to described base station.
9. the method for sharding management messages on range finding as claimed in claim 1 connects is characterized in that: described administrative messag is distance measurement request message, basic capability negotiating request message or basic the connection to go up the administrative messag that sends.
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| CN101547395B true CN101547395B (en) | 2011-02-23 |
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| CN102104931B (en) * | 2009-12-16 | 2015-05-13 | 中兴通讯股份有限公司 | Method and device for fragmenting, sending and receiving network topology information |
| CN102076023B (en) * | 2010-10-08 | 2013-01-16 | 电信科学技术研究院 | Buffer memory space distribution method and equipment |
| US9088455B2 (en) * | 2012-12-20 | 2015-07-21 | Broadcom Corporation | OFDM or OFDMA signaling for ranging and data |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1882159A (en) * | 2005-03-09 | 2006-12-20 | 三星电子株式会社 | System and method for performing ranging process in a communication system |
| CN101047880A (en) * | 2006-03-31 | 2007-10-03 | 华为技术有限公司 | Message transmission method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1882159A (en) * | 2005-03-09 | 2006-12-20 | 三星电子株式会社 | System and method for performing ranging process in a communication system |
| CN101047880A (en) * | 2006-03-31 | 2007-10-03 | 华为技术有限公司 | Message transmission method and system |
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