CN101370258B - Method, apparatus and system for switching sharing signal channel - Google Patents

Abstract

The invention belongs the technical field of communications and discloses a switching method, device and system sharing channels. The method of the invention includes: receiving list information of adjacent shared channels of carrier frequency where sectors are located, wherein the list information carries PN code of the adjacent shared channels; searching for adjacent carrier frequency signals in session process, wherein the PN code of the carrier frequency channels matches with the PN code of the list if the strength of the signals exceeds a preset threshold, and the successfully matched carrier frequency channels are added in an active set if the matching is successful. The application of the technical proposal in the invention avoids channel congestion due to a lot of signaling alternation in forward and backward directions, and improves the system capacity.

Description

A shared channel switching method, device and system

technical field

The present invention relates to the technical field of communications, and in particular to a shared channel switching method, device and system.

Background technique

In the communication system, the composition of the air interface channel of a typical code division multiple access (CDMA, Code Division Multiple Access) trunking system based on the forward and reverse channel full sharing working mechanism includes: forward common channel, forward traffic channel , reverse common channel, reverse traffic channel. Among them, the forward common channel includes: the forward pilot channel used to assist the mobile terminal to acquire the base station signal and signal strength, the forward synchronization channel used to synchronize the time of the mobile terminal with the system where the mobile terminal is located, and the forward synchronization channel used to assist the mobile terminal to find The forward paging channel of the call; the forward traffic channel includes: the forward shared traffic channel used to transmit the forward shared voice, the forward shared signaling channel used to transmit the forward shared signaling; the reverse common channel includes: The reverse access channel used to assist the mobile terminal to access the signal, the reverse pilot channel used to assist the demodulation traffic channel; the reverse traffic channel includes: the reverse shared voice channel used to transmit the reverse voice, Reverse shared signaling channel for reverse signaling.

In the group call of the trunking system, the shared signaling channel should provide services for all mobile terminals, such as mobile phones, and the forward and reverse signaling of each mobile phone may be different, so the processing of the shared signaling channel Capacity will become the main bottleneck of the cluster system. In the service state, the signaling interaction between the mobile phone and the system mainly includes voice control and handover, and handover mainly refers to adding or deleting a channel from the active set. The frequency of the speaking right signaling is usually related to the trunking call model. Generally, the frequency is low, while the frequency of the handover signaling is higher than that of the speaking right control. If it is not optimized, the handover signaling will affect the The capacity of the cluster system.

In the prior art, the process of channel switching by the mobile terminal is as follows: the mobile terminal reports a frequency strength measurement message (PSMM, Pilot Strength Measure Message); the system side issues a handoff instruction message (HDM, Handoff Direction Message) after making a handover decision; The mobile terminal reports a Handoff Completion Message (HOCM, Handoff Completion Message) after updating the active set; the system sends a Neighbor List Update Message (NLUM, Neighbor List Update Message) after updating the neighbor cells.

During the research and practice of the prior art, the inventors found that the prior art has the following problems: there are many signaling interactions between forward and reverse during the entire handover process in the prior art, resulting in the mobile terminal A large amount of reverse signaling may collide; and when there are many group call users under the sector carrier frequency, it will also cause a large amount of forward signaling, making the forward shared channel congested.

Contents of the invention

The technical problem to be solved by the embodiment of the present invention is to provide a shared channel switching method, device and system, which can avoid the congestion of the forward and reverse channels and improve the capacity of the system.

In order to solve the above technical problems, the embodiment of the present invention is achieved through the following technical solutions:

An embodiment of the present invention provides a shared channel switching method, including:

Receive the adjacent shared channel list information of the carrier frequency of the sector where it is located, and the list information carries the PN code of the adjacent shared channel;

Search the carrier frequency signal during the session, if the strength of the searched adjacent carrier frequency signal exceeds the preset threshold, match the PN code of the carrier frequency channel with the PN code in the list, if the match is successful , add the channel of the successfully matched carrier frequency to the active set.

The embodiment of the present invention also provides a shared channel switching device, including:

The receiving unit is used to receive the adjacent shared channel list information of the carrier frequency of the sector where it is located;

a search unit, configured to search for a carrier frequency signal during a session;

a threshold comparison unit, configured to compare the strength of the searched adjacent carrier frequency signal with a preset threshold;

A matching unit, configured to match the PN code of the carrier frequency channel with the PN codes in the list when the strength of the adjacent carrier frequency signal exceeds a preset threshold;

The switching unit is configured to add the successfully matched carrier frequency channels into the active set.

It can be seen from the above technical solutions that due to receiving the adjacent shared channel list information of the carrier frequency of the sector where the sector is located, the list information carries different PN codes; when searching for adjacent carrier frequency signals during the session, if the strength of the signal Exceeding the preset threshold, match the PN code of the signal with the PN code in the list. It can be seen that the switching judgment and PN code matching are all completed at one end. If the matching is successful, the channel where the successfully matched carrier frequency signal is located Join the active set. Therefore, only by receiving the adjacent shared channel list information of the carrier frequency of the sector where the mobile terminal is located, the mobile terminal can independently complete the handover, thereby avoiding channel congestion caused by a large number of forward and reverse signaling interactions and improving the system capacity.

Description of drawings

FIG. 1 is a flowchart provided by Embodiment 1 of the present invention;

FIG. 2 is a flowchart provided by Embodiment 2 of the present invention;

FIG. 3 is a flowchart provided by Embodiment 3 of the present invention;

Fig. 4 is a schematic diagram of the device provided by Embodiment 1 of the present invention;

Fig. 5 is a schematic diagram of the device provided by Embodiment 2 of the present invention;

Fig. 6 is a schematic diagram of the device provided by Embodiment 3 of the present invention;

FIG. 7 is a schematic diagram of a system provided by Embodiment 3 of the present invention.

Detailed ways

Embodiments of the present invention provide a shared channel switching method, device, and system, which are used for forward shared channel switching of a trunking system with a forward and reverse channel full-sharing working mechanism, which can avoid congestion of the front and reverse channels and improve system performance. capacity. In order to make the technical scheme of the present invention clearer, the following examples are listed for illustration:

Referring to Fig. 1, it is a flowchart provided by Embodiment 1 of the present invention:

101: Receive the adjacent shared channel list information of the carrier frequency of the sector where it is located, and the list information carries the PN code of the adjacent shared channel; wherein, receiving the adjacent shared channel list information of the carrier frequency of the sector where it is located may be periodic , the sector refers to the set of areas corresponding to the PN codes of all channels in the active set of the mobile terminal.

102: Search for a carrier frequency signal during a session;

103: If an adjacent carrier frequency signal is found during the session, compare the searched adjacent carrier frequency signal strength with a preset threshold, and execute step 104;

104: If the strength of the signal exceeds a preset threshold, match the PN code of the carrier frequency channel with the PN code in the list;

105: Add the successfully matched carrier frequency channel to the active set.

Wherein, the preset threshold is set according to actual needs.

Wherein, the adjacent shared channel list includes: PN code, Walsh code, QOF plane, and handover type.

This embodiment is illustrated below:

For example, a group call is established under the carrier frequency of a certain sector, and a total of 10 users join, and it is assumed that each user performs a handover every 10 seconds on average. In this way, 100 handovers will occur within 100 seconds. Let the channel broadcast a list of adjacent shared channels. The mobile phone receives and saves the list of adjacent shared channels in the sector; if the mobile phone searches for an adjacent carrier frequency signal during the session, and the strength of the signal exceeds a certain threshold, it performs PN code matching in the saved shared channel , if there are 8 users who are successfully matched, the mobile phone will add the channel of the successfully matched carrier frequency to the active set and update the neighbor cell list; in this way, the 80 handovers that occur within 100 times of these 8 users are independently completed by the mobile phone, no need The mobile phone performs signaling interaction with the system side.

If two users fail to match, the mobile phone will report a carrier frequency strength measurement message; the system side will issue a handover instruction message after making a handover decision; the mobile phone will report a handover completion message after updating the active set; District list update message. In the process of completing 20 handovers between two users within 100 seconds, at least 40 reverse signaling and 40 forward signaling are required. In this way, part or all of the user switching can be independently completed by the mobile phone according to the matching, which reduces the load of the signaling channel.

Referring to Figure 2, it is a flowchart provided by Embodiment 2 of the present invention, including:

201: Receive the adjacent shared channel list information of the carrier frequency of the sector where it is located. The receiving of the adjacent shared channel list information of the carrier frequency of the sector where it is located may be periodic, and the list information carries the PN code of the adjacent shared channel;

Wherein, the sector refers to a set of areas corresponding to PN codes of all channels in the active set of the mobile terminal.

202: Search for a carrier frequency signal during a session;

203: If an adjacent pilot signal is found during the session, compare the searched adjacent carrier signal strength with a preset threshold, and if the signal strength exceeds the preset threshold, execute step 204;

204: Match the PN code of the carrier frequency channel with the PN code in the list;

205: Add the channel of the successfully matched carrier frequency to the active set;

206: Add the adjacent shared channel list of the channel added to the carrier frequency of the active set to the adjacent shared channel list of the carrier frequency of the sector where it is located. For example, if the carrier frequency channel of the active set A is A1, then the adjacent shared channel list of A1 is added to the adjacent shared channel list of A.

Wherein, the preset threshold and the preset duration are set according to actual needs.

Wherein, the adjacent shared channel list includes: PN code, Walsh code, QOF plane, and handover type.

Referring to Figure 3, it is a flow chart provided by Embodiment 3 of the present invention, including:

301: Receive the adjacent shared channel list information of the carrier frequency of the sector where it is located. The receiving of the adjacent shared channel list information of the carrier frequency of the sector where it is located may be periodic, and the list information carries the PN code of the adjacent shared channel;

Wherein, the sector refers to a set of areas corresponding to PN codes of all channels in the active set of the mobile terminal.

302: Search for carrier frequency signals during the session;

303: If an adjacent carrier frequency signal is found during the session, compare the strength of the searched adjacent carrier frequency signal with a preset threshold, and if the strength of the signal exceeds the preset threshold, perform step 304;

304: Match the PN code of the carrier frequency channel with the PN code in the list;

305: Add the channel of the successfully matched carrier frequency to the active set;

306: Add the adjacent shared channel list of the carrier frequency channel of the active set to the adjacent shared channel list of the carrier frequency of the sector; for example, if the channel of the carrier frequency of the active set A is A1, then add the corresponding The adjacent shared channel list is added to A's adjacent shared channel list.

307: If it is detected during the session that the signal strength of the carrier frequency in the active set is lower than the preset threshold and lasts for a preset duration, delete the channel of the carrier frequency from the active set;

308: Change the list of adjacent shared channels of the channel of the carrier frequency from the list of adjacent shared channels of the carrier frequency of the sector where it is located. For example, the channel of the carrier frequency in the active set A is A1 deleted, then the adjacent shared channel list of A1 is deleted from the adjacent shared channel list of A;

Wherein, the preset threshold and the preset duration are set according to actual needs.

Wherein, the adjacent shared channel list includes: PN code, Walsh code, QOF plane, and handover type.

The above embodiments describe the method provided by the invention, and the device and system provided by the embodiment of the invention are described below.

Referring to Figure 4, it is a schematic diagram of the device provided by Embodiment 1 of the present invention, including:

The receiving unit 401 is configured to receive the adjacent shared channel list information of the carrier frequency of the sector where it is located. For example, the mobile phone receives the adjacent shared channel list information of the sector where it is located.

The searching unit 402 is configured to search for carrier frequency signals during a session.

The threshold comparison unit 403 is configured to compare the strength of the adjacent carrier frequency signal with a preset threshold when the adjacent carrier frequency signal is searched during the session, and the threshold can be set according to specific situations.

The matching unit 404, when the strength of the carrier frequency signal exceeds a preset threshold, matches the PN code of the channel of the carrier frequency with the PN codes in the list;

The switching unit 405 is configured to add the channel of the successfully matched carrier frequency to the active set.

Referring to Figure 5, it is a schematic diagram of the device provided by Embodiment 2 of the present invention, including:

The receiving unit 401 is configured to receive the adjacent shared channel list information of the carrier frequency of the sector where it is located. For example, the mobile phone receives the adjacent shared channel list information of the sector where it is located.

The searching unit 402 is configured to search for carrier frequency signals during a session.

The threshold comparison unit 403 is configured to compare the strength of the adjacent carrier frequency signal with a preset threshold when the adjacent carrier frequency signal is searched during the session, and the threshold can be set according to specific situations.

The matching unit 404, when the strength of the carrier frequency signal exceeds a preset threshold, matches the PN code of the channel of the carrier frequency with the PN codes in the list;

The switching unit 405 is configured to add the channel of the successfully matched carrier frequency to the active set.

The update unit 501 is configured to update the adjacent shared channel list of the carrier frequency of the sector where the number of channels in the active set changes. For example, when a channel is added to the active set, the adjacent shared channel list of the carrier frequency channel added to the active set is added to the adjacent shared channel list of the carrier frequency of the sector where it is located.

Referring to Figure 6, it is a schematic diagram of the device provided by Embodiment 3 of the present invention, including:

The receiving unit 401 is configured to receive the adjacent shared channel list information of the carrier frequency of the sector where it is located. For example, the mobile phone receives the adjacent shared channel list information of the sector where it is located.

The searching unit 402 is configured to search for carrier frequency signals during a session.

The threshold comparison unit 403 is configured to compare the strength of the adjacent carrier frequency signal with a preset threshold when the adjacent carrier frequency signal is searched during the session, and the threshold can be set according to specific situations.

The matching unit 404, when the strength of the carrier frequency signal exceeds a preset threshold, matches the PN code of the channel of the carrier frequency with the PN codes in the list;

A switching unit 405, configured to add the channel of the successfully matched carrier frequency to the active set;

The update unit 501 is configured to update the adjacent shared channel list of the carrier frequency of the sector where the channel is located when the number of channels in the active set changes; The adjacent shared channel list is added to the adjacent shared channel list of the carrier frequency of the sector where it is located, or when a channel is deleted from the active set, the adjacent shared channel list of the channel of the carrier frequency is removed from the adjacent shared channel list of the sector Adjacent shared channel list for the carrier frequency.

The deletion unit 601 is configured to detect that the carrier frequency signal strength of the active set is lower than a preset threshold during the session, the preset threshold is set according to specific situations, and the carrier frequency signal strength is lower than the preset threshold within the preset time length If the state of the set threshold continues, the channel where the carrier frequency signal is located is deleted from the active set.

Referring to Figure 7, it is a schematic diagram of the system provided by Embodiment 3 of the present invention, including:

The broadcasting unit 701 is configured to broadcast adjacent shared channel list information on the forward shared channel. For example, the system side periodically broadcasts on the forward shared channel, and sends the adjacent shared channel list of the sector where the mobile phone is located to the mobile phone.

The receiving unit 401 is configured to receive the adjacent shared channel list information of the carrier frequency of the sector where it is located. The mobile phone receives the adjacent shared channel list information of the sector where it is located.

The searching unit 402 is configured to search for carrier frequency signals during a session.

The threshold comparison unit 403 is configured to compare the strength of the adjacent carrier frequency signal with a preset threshold when the adjacent carrier frequency signal is searched during the session, and the threshold can be set according to specific situations.

The matching unit 404, when the strength of the carrier frequency signal exceeds a preset threshold, matches the PN code of the channel of the carrier frequency with the PN codes in the list;

A switching unit 405, configured to add the channel of the successfully matched carrier frequency to the active set;

The update unit 501 is configured to update the adjacent shared channel list of the carrier frequency of the sector where the channel is located when the number of channels in the active set changes; The adjacent shared channel list is added to the adjacent shared channel list of the carrier frequency of the sector where it is located, or when a channel is deleted from the active set, the adjacent shared channel list of the channel of the carrier frequency is removed from the adjacent shared channel list of the sector List of adjacent shared channels for the carrier frequency.

The deletion unit 601 is configured to detect that the carrier frequency signal strength of the active set is lower than a preset threshold during the session, the preset threshold is set according to specific situations, and the carrier frequency signal strength is lower than the preset threshold within the preset time length If the state of the set threshold continues, the channel where the carrier frequency signal is located is deleted from the active set.

It can be seen from the above embodiments that due to receiving the adjacent shared channel list information of the carrier frequency of the sector where the sector is located, the list information carries different PN codes; when searching for adjacent carrier frequency signals during the session, if the strength of the signal Exceeding the preset threshold, match the PN code of the signal with the PN code in the list. It can be seen that the switching judgment and PN code matching are all completed at one end. If the matching is successful, the channel where the successfully matched carrier frequency signal is located Join the active set. Therefore, only by receiving the adjacent shared channel list information of the carrier frequency of the sector where the mobile terminal is located, the mobile terminal can independently complete the handover, thereby avoiding channel congestion caused by a large number of forward and reverse signaling interactions and improving the system capacity. And, if it is detected during the session that the strength of the carrier frequency signal in the active set is lower than the preset threshold and lasts for a preset duration, the carrier frequency signal will be deleted from the active set to avoid a large number of low-strength signals in the active set .

Those skilled in the art can understand that all or part of the steps in the methods of the above embodiments can be implemented by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium.

The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, and the like.

The method, device and system for providing a shared channel switching provided by the present invention have been introduced in detail above. For those of ordinary skill in the art, based on the ideas of the embodiments of the present invention, there will be specific implementation methods and application scopes. Changes, in summary, the contents of this specification should not be construed as limiting the present invention.

Claims (10)

1. the changing method of a shared channel is characterized in that, comprising:

Receive the adjacent shared channel list information of sector of living in carrier frequency, described list information carries the PN sign indicating number of adjacent shared channel;

In conversation procedure, search for CF signal, if the intensity of the adjacent carrier frequency signal that searches surpasses the thresholding that presets, the intensity of signal is mated above the PN sign indicating number of the channel of the adjacent carrier frequency of the thresholding that presets and the PN sign indicating number in the described tabulation, if the match is successful, with the channel adding Active Set of the carrier frequency that the match is successful.

2. method according to claim 1 is characterized in that, described channel with the carrier frequency that the match is successful adds after the Active Set, further comprises:

The adjacent shared channel tabulation that the adjacent shared channel tabulation that adds the channel of Active Set carrier frequency is added described sector of living in carrier frequency.

3. method according to claim 1 is characterized in that, described channel with the carrier frequency that the match is successful adds after the Active Set, further comprises:

Be lower than the thresholding that presets if in conversation procedure, detect Active Set CF signal intensity, and in the duration that presets, continue, the channel that signal strength signal intensity is lower than the Active Set carrier frequency of the thresholding that presets is deleted from Active Set, and the adjacent shared channel tabulation of channel of Active Set carrier frequency that signal strength signal intensity is lower than the thresholding that presets is from the adjacent shared channel tabulation deletion of described sector of living in carrier frequency.

4. method according to claim 1 is characterized in that, described adjacent shared channel tabulation comprises: PN sign indicating number, Walsh sign indicating number, QOF plane, and switching type.

5. method according to claim 1 is characterized in that, described intensity with signal is mated above the PN sign indicating number of the channel of the adjacent carrier frequency of the thresholding that presets and the PN sign indicating number in the described tabulation, comprising:

Carry out the structure matching between PN sign indicating number and the PN sign indicating number, and/or frequency match.

6. the switching device shifter of a shared channel is characterized in that, comprising:

Receiving element is used to receive the adjacent shared channel list information of sector of living in carrier frequency;

Search unit is used for searching for CF signal at conversation procedure;

The thresholding comparing unit, the intensity that is used for the adjacent carrier frequency signal that will search compares with the thresholding that presets;

Matching unit is used for when the intensity of adjacent carrier frequency signal surpasses the thresholding that presets the intensity of signal being mated above the PN sign indicating number of the channel of the adjacent carrier frequency of the thresholding that presets and the PN sign indicating number in the described tabulation;

Switch unit is used for the channel of the carrier frequency that the match is successful is added Active Set.

7. device according to claim 6 is characterized in that, described device further comprises:

Delete cells is used for searching Active Set CF signal intensity at conversation procedure and is lower than the thresholding that presets, and continues in the duration that presets, and the Active Set CF signal place channel that signal strength signal intensity is lower than the thresholding that presets is deleted from Active Set.

8. according to claim 6 or 7 described devices, it is characterized in that described device further comprises:

Updating block when the number that is used for described Active Set channel changes, upgrades the adjacent shared channel tabulation of sector of living in carrier frequency.

9. the switched system of a shared channel is characterized in that, comprising:

Radio unit is used for the adjacent shared channel list information of broadcasting on forward shared channel;

Receiving element is used to receive the adjacent shared channel list information of sector of living in carrier frequency;

Search unit is used for searching for CF signal at conversation procedure;

The thresholding comparing unit, the intensity that is used for the adjacent carrier frequency signal that will search compares with the thresholding that presets;

Matching unit is used for when the intensity of adjacent carrier frequency signal surpasses the thresholding that presets, and the PN sign indicating number during the PN sign indicating number of channel that the intensity of signal is surpassed the adjacent carrier frequency of the thresholding that presets is tabulated with the adjacent shared channel of sector of living in carrier frequency mates;

Switch unit is used for the channel of the carrier frequency that the match is successful is added Active Set.

10. system according to claim 9 is characterized in that, described system further comprises:

Delete cells is used for searching Active Set CF signal intensity at conversation procedure and is lower than the thresholding that presets, and continues in the duration that presets, and the Active Set CF signal place channel that signal strength signal intensity is lower than the thresholding that presets is deleted from Active Set;

Updating block when the number that is used for described Active Set channel changes, upgrades the adjacent shared channel tabulation of sector of living in carrier frequency.

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