CN103546947A - Downlink control signal transmitting method for TDMA mobile communication systems and application thereof - Google Patents
Downlink control signal transmitting method for TDMA mobile communication systems and application thereof Download PDFInfo
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- CN103546947A CN103546947A CN201210247911.5A CN201210247911A CN103546947A CN 103546947 A CN103546947 A CN 103546947A CN 201210247911 A CN201210247911 A CN 201210247911A CN 103546947 A CN103546947 A CN 103546947A
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Abstract
The invention relates to a downlink control signal transmitting method for TDMA mobile communication systems and application thereof in the establishment of communication links. The method includes the steps of 1, using fixed frequency time slot configured for base station equipment as a downlink control time slot, and transmitting a downlink control signal; 2, using a mobile terminal to monitor the downlink control time slot, and detecting the downlink control signal; 3, using the mobile terminal to extract a target ID in the downlink control signal; if the target ID is identical to the ID of the mobile terminal, reading the complete downlink control signal; if not, repeating the step 2. The method has the advantages that processing of the mobile terminal is quite easy, power consumption of the mobile terminal can be reduced effectively, paging messages from the base station equipment to the mobile terminal are transmitted with no need for multiple channels and multiple times, signal processing is simple, delay in the establishment of introduced links is small, and the method is applicable to trunking communication systems having very high delay requirements.
Description
Technical field
The present invention relates to a kind of signaling method, more particularly, relate to descending control signaling sending method in a kind of TDMA mobile communication system, and the application of the method on communication link is set up is provided.
Background technology
The frame structure of a kind of tdma communication system as shown in Figure 1, comprises 7 time slots and a guard time interval GP.Each time slot can be configured to upstream or downstream as required, and a kind of available time slot 0,1,2,3 that is configured to is configured to down direction, and time slot 4,5,6 is configured to up direction.
In a mobile communication system, comprise one or more base station equipments, the mobile terminal that each base station equipment can be in overlay area provides access or relay services.For the mobile terminal in base station equipment overlay area, when setting up communication as called requirement, first need to by signaling, send link establishment by base station equipment indicates to called mobile terminal, correspondingly, mobile terminal for idle condition, need to monitor signaling channel, to judge whether the call signaling for oneself.
Frame structure as shown in Figure 1, configuration for downlink call control signal, a kind of scheme of routine is at the equal configurable signaling channel of each descending time slot, signaling channel can carry complete link control signal, mobile terminal need to be monitored all descending time slots like this, receives and judges the signaling of issuing oneself.Because signaling in communication process does not always exist, on each time slot, signaling can with service time division multiplex physical resource, therefore this mode can effectively improve the utilance of channel.But, for the mobile terminal in base station equipment overlay area, owing to cannot predicting at which descending time slot, have the signaling of issuing oneself, therefore mobile terminal need to receive the signaling of each descending time slot, and signaling is carried out after decoding processing, just can judge and whether have the signaling that sends to oneself, under extreme case, mobile terminal need to receive the signaling of all descending time slot carryings, just can complete the judgement of signaling, for multi-slot tdma system, this processing mode will increase the processing complexity of mobile terminal, increase the power consumption of mobile terminal, be unfavorable for electricity saving of mobile terminal.
For the wireless communication system that adopts TDMA multi-access mode, in prior art, signaling channel generally with the multiplexing identical physical resource of Traffic Channel, whether called mobile terminal is being monitored while having for oneself calling, need to monitor all time slots, the information that judgement current time slots receives is signaling or business datum, if signaling, need to signaling be checked and be processed, judge whether the signaling for oneself, under extreme case, mobile terminal need to all be processed all time slots in a frame, could judge whether present frame has the signaling for oneself, such method can cause the processing of mobile terminal too complicated, and cause mobile terminal power consumption to rise.
Another kind of scheme is to adopt to be similar to 3G communication system, as the scheme in TD-SCDMA system, special Page Indication Channel and paging channel is set.When have for certain mobile terminal calling time, first base station equipment notifies mobile terminal by Page Indication Channel, and then send concrete paging information if paging reason etc. is to this mobile terminal by paging channel, mobile terminal receives after concrete paging information, by Random Access Channel, initiate access request, set up on special-purpose signaling channel, carry out after signaling link mutual.For this scheme, base station equipment need to be transmitted by a plurality of channels several times to the paging information of mobile terminal, signaling is processed comparatively complicated, the link establishment time delay of introducing is larger, for the very high trunked communication system of delay requirement, this signal deployment scheme cannot meet the delay requirement of system.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, descending control signaling sending method in a kind of TDMA mobile communication system that a kind of capacity is large, low in energy consumption, time delay is little is provided, and the application of the method on communication link is set up is provided.
Technical scheme of the present invention is as follows:
A descending control signaling sending method in mobile communication system, step is as follows:
1) base station equipment configures fixing frame slot as descending control slot, sends descending control signaling;
2) mobile terminal is monitored descending control slot, detects descending control signaling;
3) mobile terminal extracts the Target id in descending control signaling, if described Target id is identical with the ID of mobile terminal, reads complete descending control signaling, otherwise repeating step 2).
As preferably, if the Target id described in step 3) is group ID, judge whether mobile terminal belongs to the mobile terminal group of this group ID indication, if so, reads complete descending control signaling, otherwise repeating step 2).
As preferably, the descending control slot bearing downlink Paging Control Channel described in step 1).
As preferably, the descending control signaling described in step 1) comprises: the call signaling to the mobile terminal under idle condition; Control command word to the mobile terminal under linking status.
As preferably, control command word comprises one or more in sign, Target id of power control command word, synchronous control command word, the indication of current business channel, feedback link setup response indication, business model indication, list/duplexing call mode field, group calling/exhale.
As preferably, base station equipment is measured the quality of uplink signal that current mobile terminal sends, according to the measurement to mobile terminal quality of uplink signal, generate the power control command word to mobile terminal transmitted power, mobile terminal is adjusted transmitted power according to described power control command word.
As preferably, mobile terminal, in the communication process with base station equipment, carries out Timing Synchronization.
As preferably, between mobile terminal and base station equipment, synchronize the employing closed loop method of synchronization, the upward signal that base station equipment Timing measurement mobile terminal sends, and compare with predefined desirable receiving position, generate synchronous control command word, mobile terminal receives after synchronous control command word, upper while once sending upstream data, and the position of haircuting and sending according to the described synchronous control command tone of Chinese characters.
As preferably, for the available free mobile terminal in base station equipment coverage, base station equipment, for article one control signal of idle mobile terminal, is to send on the descending Paging Control Channel carrying at the descending control slot configuring.
A method for Rapid Establishment link, based on descending control signaling sending method in TDMA mobile communication system, step is as follows:
1) base station equipment receives mobile terminal in this base station coverage area or the calling link setup request of the user under other base stations;
2) base station equipment is described calling link setup request distribution service channel, and sends the descending control signaling for called mobile terminal on descending Paging Control Channel;
3) mobile terminal is monitored descending Paging Control Channel, and obtains the Target id in the descending control signaling of descending Paging Control Channel carrying;
4) mobile terminal by the ID of itself with receive Target id and mate, whether the descending control signaling described in judgement is the descending control signaling that sends to self; If so, continue next step; Otherwise, end process, and repeat step 3);
5) called mobile terminal forwards in the downlink traffic channel of distribution, prepares to receive downlink service data or signaling.
As preferably, described method further comprises following steps: in step 4) and 5) between, in the descending control signaling that mobile terminal carries according to descending Paging Control Channel, reply indication, if need called mobile terminal feedback link, set up the response of request link setup, mobile terminal forwards on the reverse link traffic channel of distribution, sends request for building link response; Otherwise carry out step 5).
Beneficial effect of the present invention is as follows:
Descending control signaling sending method of the present invention, in communication system, a descending time slot of special employing, for bearing downlink control signal, the link configuration information that this control signal portability is enough, in base station equipment overlay area, all mobile terminal at one's leisure, only need to monitor this signalling time slot, control signal to this signalling time slot carrying is processed, whether can judge is the signaling for oneself, and subsequent treatment is carried out in indication according to signaling, the processing that has realized mobile terminal is very simple, and can effectively reduce the power consumption of mobile terminal.
Base station equipment does not need to transmit several times by a plurality of channels to the paging information of mobile terminal, and signaling is processed simple, and the link establishment time delay of introducing is little, is applicable to for the very high trunked communication system of delay requirement.
Accompanying drawing explanation
Fig. 1 is the structural representation of the frame of method employing of the present invention;
Fig. 2 is the flow chart of descending control signaling sending method in TDMA mobile communication system;
Fig. 3 is the flow process flow chart of the Rapid Establishment link methodology based on descending control signaling sending method in TDMA mobile communication system;
In figure: GP is guard time interval.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
A descending control signaling sending method in mobile communication system, step is as follows:
1) base station equipment configures fixing frame slot as descending control slot, sends descending control signaling; Described descending control slot bearing downlink Paging Control Channel; Described descending control signaling comprises: the call signaling to the mobile terminal under idle condition; Control command word to the mobile terminal under linking status.
2) mobile terminal is monitored descending control slot, detects descending control signaling;
3) mobile terminal extracts the Target id in descending control signaling, if described Target id is identical with the ID of mobile terminal, reads complete descending control signaling, otherwise repeating step 2).
If the Target id described in step 3) is group ID, judge whether mobile terminal belongs to the mobile terminal group of this group ID indication, if so, reads complete descending control signaling, otherwise repeating step 2).
Control command word described in step 1) comprises one or more in sign, Target id of power control command word, synchronous control command word, the indication of current business channel, feedback link setup response indication, business model indication, list/duplexing call mode field, group calling/exhale.
Described Target id represents destination terminal addresses, and the ID of mobile terminal represents the terminal address of mobile terminal.
Base station equipment is measured the quality of uplink signal that current mobile terminal sends, according to the measurement to mobile terminal quality of uplink signal, the power control command word of generation to mobile terminal transmitted power, mobile terminal is adjusted transmitted power according to described power control command word.
Mobile terminal is in the communication process with base station equipment, carry out Timing Synchronization, adopt the closed loop method of synchronization, it is the upward signal that base station equipment Timing measurement mobile terminal sends, and compare with predefined desirable receiving position, generating synchronous control command word, mobile terminal receives after synchronous control command word, upper while once sending upstream data, the position of haircuting and sending according to the described synchronous control command tone of Chinese characters.
For the available free mobile terminal in base station equipment coverage, base station equipment, for article one control signal of idle mobile terminal, is to send on the descending Paging Control Channel carrying at the descending control slot configuring.
Frame as shown in Figure 1, for the frame structure of a kind of tdma communication system of the present invention (based on but be not limited to this frame structure, method of the present invention is also applicable to other TDMA mobile communication system), comprise 7 time slots and a guard time interval GP.Each time slot can be configured to upstream or downstream as required, and a kind of available time slot 0,1,2,3 that is configured to is configured to down direction, and time slot 4,5,6 is configured to up direction.
The present invention proposes a kind of configuration and sending method of downlink signaling channel, in a radio frames, at least configure a specific time slot as descending control slot, for bearing downlink Paging Control Channel, this Paging Control Channel carrying sends to the descending control signaling of mobile terminal, comprise the call signaling to the mobile terminal under idle condition, control command word to mobile terminal under linking status (comprises power control command word, synchronous control command word etc.), base station equipment sends to article one descending control signaling of the mobile terminal of idle condition, always by this signaling channel, send.
In the present embodiment, for frame structure as shown in Figure 1, time slot 0 is exclusively used in control slot, common control channel signaling channel for all mobile terminals in system is configured on time slot 0, all mobile terminals in base station equipment overlay area, when idle condition, only need to monitor this signalling time slot (for base station equipment, configurable many signaling channels, on a plurality of time slots, send, but the mobile terminal for idle condition, base station equipment is for article one descending control signaling of this mobile terminal, can only send from the control signal channel being mapped to control slot), by being separated to mediation decoding, the information of this signalling time slot carrying processes, judge current call request or other control informations whether having for oneself.
For example, for conventional call setup, after the call request that calling mobile terminal in base station equipment receives overlay area or other base station equipments, gateway device send, by being configured in the descending Paging Control Channel of descending control slot, this call request is sent to the mobile terminal in overlay area, mobile terminal in this base station equipment overlay area, only need to detect the descending Paging Control Channel of descending control slot, this descending Paging Control Channel is carried out to decoding processing, can judge the current call request whether having for oneself.
Concrete steps are as shown in Figure 2:
1) base station equipment sends descending control signaling at descending control slot;
2) mobile terminal is monitored descending control slot, to receiving the descending control signaling being carried by descending Paging Control Channel, processes, read descending control signaling in the Target id that comprises;
3) according to the Target id in signaling, judge that whether Target id identical with the ID of mobile terminal, if or this Target id be group ID, judge whether mobile terminal belongs to the mobile terminal group that this group ID indicates;
4) if Target id is identical with oneself ID or mobile terminal belongs to the mobile terminal group of this group ID indication, explanation need to be read this signaling, extracts other configuration informations in descending control signaling, and according to signaling, subsequent treatment is carried out in indication;
5), if ID does not mate, get back to step 2), continue to monitor descending control signaling.This signaling channel is also used in communication process for the mobile terminal transmission link control command of communicating by letter, as power control command, synchronous control command word.
In communication process, for the uplink transmission power to mobile terminal is controlled, reduce the power consumption of mobile terminal, promote link-quality, base station equipment can be measured the quality of uplink signal that current mobile terminal sends, according to the measurement to mobile terminal quality of uplink signal, produce the power control command word to mobile terminal transmitted power, mobile terminal is adjusted transmitted power according to this power control command word.
In addition, for tdma system, mobile terminal needs to keep Timing Synchronization with base station equipment in communication process always, in order to keep more accurate synchronous, can adopt the synchronous mode of closed loop, be that base station equipment is carried out Timing measurement by the upward signal that mobile terminal is sent, and compare with desirable receiving position, the synchronous control command word of generation to mobile terminal, by signaling channel, this synchronous control command word is sent to after mobile terminal to the position that can haircut and send according to this synchronous control command tone of Chinese characters when mobile terminal sends upstream data next time.
In order in time power control command word and synchronous control command word to be sent to controlled mobile terminal, do not take again traffic channel resource, can utilize descending Paging Control Channel, carrying is for power control command word and the synchronous control command word of certain mobile terminal.When mobile terminal sends upward signal in Traffic Channel, also monitor descending Paging Control Channel simultaneously, once find that there is power control command and/or synchronous control command word for oneself, can send adjustment according to corresponding command word.
Therefore,, for descending Paging Control Channel, the signaling content at least comprising is as shown in table 1:
Table 1: descending control signaling contents table
For different execution modes, signaling content can send in any paging channel, and the parameter shown in table 1 can send in any paging channel.
The present invention also provides a kind of method of Rapid Establishment link, and based on descending control signaling sending method in TDMA mobile communication system, step is as follows:
1) base station equipment receives mobile terminal in this base station coverage area or the calling link setup request of the user under other base stations;
2) base station equipment is described calling link setup request distribution service channel, and sends the descending control signaling for called mobile terminal on descending Paging Control Channel;
3) mobile terminal is monitored descending Paging Control Channel, and obtains the Target id in the descending control signaling of descending Paging Control Channel carrying;
4) mobile terminal by the ID of itself with receive Target id and mate, whether the descending control signaling described in judgement is the descending control signaling that sends to self; If so, continue next step; Otherwise, end process, and repeat step 3);
5) called mobile terminal forwards in the downlink traffic channel of distribution, prepares to receive downlink service data or signaling.
Described method further comprises following steps: in step 4) and 5) between, in the descending control signaling that mobile terminal carries according to descending Paging Control Channel, reply indication, if need called mobile terminal feedback link, set up the response of request link setup, mobile terminal forwards on the reverse link traffic channel of distribution, sends request for building link response; Otherwise carry out step 5).
In communication process, business setup delay directly affects user to be experienced, and particularly, in trunked communication system, especially strict to calling establishment time delay requirement, General Requirements exchange call set-up delay is less than 300ms, and interoffice setup delay is less than 500ms.Therefore the design of signaling process and signaling channel, directly has influence on the setup delay of business.
The signaling channel configuration proposing for the present invention, can be for carrying the link setup signaling to called mobile terminal, particularly for group calling, apply, in base station equipment, receive after the link setup request of caller, directly on this signaling channel, by setting up signaling, send to called mobile terminal or mobile terminal group, in signaling channel by object mobile terminal or mobile terminal group ID(Target id), type of service (speech business, data service, broadcasting service), the information such as traffic channel assignments pass to called mobile terminal or mobile terminal group, can complete the foundation of called MS/MS group link.
As shown in Figure 3, the process of establishing of described link methodology is as follows:
1) base station equipment receives the calling link setup request of user under the interior mobile terminal of this base station coverage area or other base station equipments, and called mobile terminal is in the overlay area of this base station equipment;
2) base station equipment is this call distribution Traffic Channel, and on descending Paging Control Channel, sends the downlink call control signal for called mobile terminal, comprises the ID of called mobile terminal in signaling, type of service, channel configuration and reply the information such as indication;
3) mobile terminal is monitored descending Paging Control Channel, and the signaling of descending Paging Control Channel carrying is processed and carried out demodulation, decoding processing;
4) mobile terminal mates the ID of the mobile terminal in the signaling of the ID of oneself and the descending Paging Control Channel receiving, judge whether this descending Paging Control Channel signaling is the control signal of issuing oneself, if for oneself signaling, continue next step, otherwise, end process, jumps to step 3), continues to monitor descending Paging Control Channel;
5) in the control signal that mobile terminal carries according to descending Paging Control Channel, reply indication, if need called response link setup response, continue next step, otherwise jump to the 7th step;
6) forward on the reverse link traffic channel of distribution, send request for building link response;
7) called mobile terminal forwards in the downlink traffic channel of distribution, prepares to receive downlink service data or other downlink signalings.
Another kind of situation: in step 1), base station equipment sometimes can not determine that called mobile terminal one fixes in its overlay area, but does not affect the enforcement of this method.
Above-described embodiment is only for the present invention is described, and not as limitation of the invention.So long as according to technical spirit of the present invention, to above-described embodiment change, modification etc. all will drop in the scope of claim of the present invention.
Claims (11)
1. a descending control signaling sending method in TDMA mobile communication system, is characterized in that, step is as follows:
1) base station equipment configures fixing frame slot as descending control slot, sends descending control signaling;
2) mobile terminal is monitored descending control slot, detects descending control signaling;
3) mobile terminal extracts the Target id in descending control signaling, if described Target id is identical with the ID of mobile terminal, reads complete descending control signaling, otherwise repeating step 2).
2. descending control signaling sending method in TDMA mobile communication system according to claim 1, it is characterized in that, if the Target id described in step 3) is group ID, judge whether mobile terminal belongs to the mobile terminal group of this group ID indication, if, read complete descending control signaling, otherwise repeating step 2).
3. descending control signaling sending method in TDMA mobile communication system according to claim 1, is characterized in that, the descending control slot bearing downlink Paging Control Channel described in step 1).
4. descending control signaling sending method in TDMA mobile communication system according to claim 1, is characterized in that, the descending control signaling described in step 1) comprises: the call signaling to the mobile terminal under idle condition; Control command word to the mobile terminal under linking status.
5. descending control signaling sending method in TDMA mobile communication system according to claim 4, it is characterized in that, control command word comprises one or more in sign, Target id of power control command word, synchronous control command word, the indication of current business channel, feedback link setup response indication, business model indication, list/duplexing call mode field, group calling/exhale.
6. descending control signaling sending method in TDMA mobile communication system according to claim 5, it is characterized in that, base station equipment is measured the quality of uplink signal that current mobile terminal sends, according to the measurement to mobile terminal quality of uplink signal, the power control command word of generation to mobile terminal transmitted power, mobile terminal is adjusted transmitted power according to described power control command word.
7. descending control signaling sending method in TDMA mobile communication system according to claim 5, is characterized in that, mobile terminal, in the communication process with base station equipment, carries out Timing Synchronization.
8. descending control signaling sending method in TDMA mobile communication system according to claim 7, it is characterized in that, between mobile terminal and base station equipment, synchronize the employing closed loop method of synchronization, the upward signal that base station equipment Timing measurement mobile terminal sends, and compare with predefined desirable receiving position, generating synchronous control command word, mobile terminal receives after synchronous control command word, upper while once sending upstream data, the position of haircuting and sending according to the described synchronous control command tone of Chinese characters.
9. descending control signaling sending method in TDMA mobile communication system according to claim 3, it is characterized in that, for the available free mobile terminal in base station equipment coverage, base station equipment, for article one control signal of idle mobile terminal, is to send on the descending Paging Control Channel carrying at the descending control slot configuring.
10. a method for Rapid Establishment link, is characterized in that, based on descending control signaling sending method in TDMA mobile communication system, step is as follows:
1) base station equipment receives mobile terminal in this base station coverage area or the calling link setup request of the user under other base stations;
2) base station equipment is described calling link setup request distribution service channel, and sends the descending control signaling for called mobile terminal on descending Paging Control Channel;
3) mobile terminal is monitored descending Paging Control Channel, and obtains the Target id in the descending control signaling of descending Paging Control Channel carrying;
4) mobile terminal by the ID of itself with receive Target id and mate, whether the descending control signaling described in judgement is the descending control signaling that sends to self; If so, continue next step; Otherwise, end process, and repeat step 3);
5) called mobile terminal forwards in the downlink traffic channel of distribution, prepares to receive downlink service data or signaling.
The method of 11. Rapid Establishment links according to claim 10, it is characterized in that, described method further comprises following steps: in step 4) and 5) between, in the descending control signaling that mobile terminal carries according to descending Paging Control Channel, reply indication, if need called mobile terminal feedback link, set up the response of request link setup, mobile terminal forwards on the reverse link traffic channel of distribution, sends request for building link response; Otherwise carry out step 5).
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| CN107528681A (en) * | 2017-09-05 | 2017-12-29 | 海能达通信股份有限公司 | A kind of data transmission method, transceiver and communication terminal |
| CN108880753A (en) * | 2018-06-20 | 2018-11-23 | 深圳无线电检测技术研究院 | A kind of acquisition methods and system of grid equipment operation data |
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Application publication date: 20140129 |