CN100438686C - Cross district switching method for colony mobile station - Google Patents
Cross district switching method for colony mobile station Download PDFInfo
- Publication number
- CN100438686C CN100438686C CNB2004100703982A CN200410070398A CN100438686C CN 100438686 C CN100438686 C CN 100438686C CN B2004100703982 A CNB2004100703982 A CN B2004100703982A CN 200410070398 A CN200410070398 A CN 200410070398A CN 100438686 C CN100438686 C CN 100438686C
- Authority
- CN
- China
- Prior art keywords
- travelling carriage
- base station
- cell base
- district
- target cell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/02—Buffering or recovering information during reselection ; Modification of the traffic flow during hand-off
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/12—Reselecting a serving backbone network switching or routing node
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/08—Trunked mobile radio systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention discloses a cross district switching method for colony mobile stations. After a mobile station enters a signal covering range of a target district, a source district base station sends a switching request to a target district base station; the target district base station judges whether itself assigns a forward shared service channel for a mobile station which belongs to the same colony with the cross district mobile station in the district; if yes, the mobile station is connected to the target district base station and assigns a forward shared service channel for the mobile station in the district. After finishing switching to the target district, the mobile station releases wireless resources assigned by the source district base station. The procedure is ended. Otherwise, the target district base station assigns a forward special service channel for the mobile station according to the switching request sent by the source district base station; the mobile station is connected to the channel. After finishing switching to the target district, the mobile station release the wireless resource assigned by the source district base station. The present invention fully utilizes the forward shared service channel assigned by the colony mobile station to the system, and saves the resource of the base station system.
Description
Technical field
The present invention relates to the soft hand-off field of mobile communication, be specifically related to a kind of cross district switching method of cluster mobile station.
Background technology
Along with the fast development of mobile communication technology, as an important branch of mobile communication, trunking communicating technology also has rapid progress, compares initial trunked communication system, and the looks of present applied trunked communication system are taken on an entirely new look.Early stage group service is the private network operation, and for the professional user provides service, operation cost is higher, has also limited the development of group service simultaneously.In order to promote the sizable application of group system, trunked communication system a new application trend occurred on using, that provides professional clustering functionality exactly in code division multiple access (CDMA) system, cdma system specifically can be divided into Wideband Code Division Multiple Access (WCDMA) (WCDMA), CDMA2000 etc. again.This make group service to a great extent can the employing wireless communication system in existing hardware resource, reduced operation cost, simultaneously, the development range of group service is also expanded.
Group system has two characteristics the most outstanding, first characteristics are: a plurality of users that belong to a cluster can communicate simultaneously, but at one time, a user can only be arranged in speech, other users can only listen, the colony dispatching thought when this has embodied initial application cluster system; Second characteristic is: in a sub-district, radio communication is carried out by the travelling carriage of same group in a forward direction shared service channel (S-TCH) and the sub-district in the base station, and each travelling carriage that belongs to same group then carries out radio communication by separately Reverse Dedicated Traffic Channel (D-TCH) and base station.
When the travelling carriage that is in cluster calling state by the cell-of-origin when Target cell moves, the handover operation of this travelling carriage will start, and the mode of this transregional switching is mainly soft handover.This travelling carriage is in transregional moving process, can be through a cell-of-origin signal and the common zone that covers of Target cell signal, when the Target cell pilot signal that receives when travelling carriage arrives certain intensity, just send pilot measurement message, comprise the relevant information that travelling carriage receives the Target cell pilot signal strength in this pilot measurement message to source cell base station.After source cell base station is received this message, send handoff request message to target cell base station, at this moment, the soft handoff procedure of travelling carriage has just begun.Described handoff request message contains parameters such as radio configuration that forward direction shared service channel that source cell base station distributes for its sub-district travelling carriage comprised, Long Code Mask, frame biasing.
After target cell base station is received above-mentioned handoff request message, for travelling carriage distributes Forward Dedicated Traffic Channel, and return handover acknowledge message to source cell base station, this message comprises the channel parameter of target cell base station for the Forward Dedicated Traffic Channel of this travelling carriage distribution, after source cell base station was received this handover acknowledge message, just the channel parameter that comprises according to this message guided this travelling carriage to insert the Forward Dedicated Traffic Channel of target cell base station for its distribution.
Parameters such as the radio configuration that Forward Dedicated Traffic Channel comprised that above-mentioned target cell base station is distributed for this travelling carriage, Long Code Mask, frame biasing, parameters such as the radio configuration that is comprised with forward direction shared service channel that source cell base station is distributed for its sub-district travelling carriage, Long Code Mask, frame biasing must be identical, like this, travelling carriage could receive and handle the wireless signal from source cell base station and target cell base station simultaneously, to carry out soft handover; Otherwise, travelling carriage can only be that travelling carriage forward direction shared service channel direct-cut operation of distributing in its sub-district is to the Forward Dedicated Traffic Channel of target cell base station for this travelling carriage distribution by source cell base station, that is: travelling carriage discharges the channel that keeps wireless connections with source cell base station earlier, and inserts the Forward Dedicated Traffic Channel of target cell base station for its distribution in a short period of time.
Described travelling carriage is through behind the above-mentioned operating in soft handover, except by source cell base station for the forward direction shared service channel of its distribution with source cell base station is communicated by letter, be that the Forward Dedicated Traffic Channel of its distribution is communicated by letter with target cell base station also by target cell base station.When travelling carriage continues to move to Target cell, and when the intensity that receives the cell-of-origin pilot signal is reduced to a certain degree, travelling carriage just sends pilot measurement message to network side, comprises the relevant information that travelling carriage receives the cell-of-origin pilot signal strength in this pilot measurement message.After source cell base station is received this message, just send switch indicating information to travelling carriage, after travelling carriage is received this message, just discharge the wireless connections of itself and cell-of-origin, at this moment, travelling carriage is the Forward Dedicated Traffic Channel and the target cell base station maintenance wireless connections of its distribution by target cell base station only just, and the soft handoff procedure of travelling carriage so far promptly comes to an end.
Certainly, after travelling carriage enters cell-of-origin signal and the common coverage of Target cell signal, also might not continue to move, but move, and finally leave the signal cover of target cell base station to the cell-of-origin to Target cell; Perhaps to neither the cell-of-origin is not again another sub-district of Target cell moves and finally leave the signal cover of source cell base station and target cell base station.In this case, when the intensity that receives certain district pilots signal when travelling carriage is reduced to a certain degree, just send pilot measurement message, after this pilot measurement message is received in described sub-district, just discharge the wireless connections between itself and this travelling carriage to network side.
All be provided with handoff threshold numerical value in the above-described base station and discharge threshold value, and this handoff threshold numerical value and release threshold value are handed down to travelling carriage with the form of broadcasting.Travelling carriage constantly compares the intensity and the described handoff threshold numerical value of the Target cell pilot signal that receives, when the intensity of the Target cell pilot signal that receives when travelling carriage surpasses handoff threshold numerical value, travelling carriage thinks that then the current Target cell pilot signal that receives has arrived certain intensity, and described pilot signal strength surpasses handoff threshold numerical value and is meant: pilot signal strength is more than or equal to handoff threshold numerical value.Equally, travelling carriage also constantly compares the intensity and the described release threshold value of the cell-of-origin pilot signal that receives, the intensity that receives the cell-of-origin pilot signal when travelling carriage is lower than when discharging threshold value, and travelling carriage thinks that then the intensity of the current cell-of-origin pilot signal that receives is reduced to a certain degree.
By the above as can be seen, travelling carriage in being in cluster calling state is by the cell-of-origin soft handover at its place during to Target cell, inserting target cell base station is the Forward Dedicated Traffic Channel of its distribution, and not inserting the forward direction shared service channel that target cell base station is distributed for its sub-district travelling carriage, this makes target cell base station is that the forward direction shared service channel resource that its sub-district travelling carriage distributes is not fully utilized; Along with increasing of soft handover travelling carriage, network side has distributed increasing Dedicated Traffic Channel for travelling carriage that soft handover or soft handover finish is taking place for these, finally makes this forward direction shared service channel lose meaning; Simultaneously, target cell base station is distributed different channels respectively for the travelling carriage that each switches in the sub-district, this makes the live load of target cell base station increase greatly, target cell base station has been caused system resource waste, and under the current general condition with higher of soft switching ratio, this resource waste is then more serious.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of cross district switching method of cluster mobile station, and making cell base station is that the forward direction shared service channel that its sub-district travelling carriage distributes can be fully utilized, to save the system resource of cell base station.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention discloses a kind of cross district switching method of cluster mobile station, the method includes the steps of:
A. after the travelling carriage target approach cell signal coverage, source cell base station sends handoff request to target cell base station;
B. target cell base station judges self whether to be that the travelling carriage that belongs to same group with described travelling carriage in its sub-district has distributed forward direction shared service channel, if distributed, then enters step c; Otherwise, enter steps d;
C. travelling carriage inserts the forward direction shared service channel that target cell base station is its sub-district travelling carriage distribution, and process ends;
D. to the handoff request of its transmission, for travelling carriage distributes Forward Dedicated Traffic Channel, travelling carriage inserts this Forward Dedicated Traffic Channel to target cell base station according to source cell base station among the step a.
Among the step a, described source cell base station sends handoff request to target cell base station and comprises:
When the Target cell pilot signal strength that receives when travelling carriage surpassed the handoff threshold numerical value that is provided with, travelling carriage sent pilot measurement reports to network side, after source cell base station is received this pilot measurement reports, sent handoff request to target cell base station.
Described handoff request is: comprise the message of source cell base station for the forward direction shared service channel parameter of its sub-district travelling carriage distribution.
Among the step c, travelling carriage inserts before the described forward direction shared service channel, further may further comprise the steps:
C1. the channel parameter that in the handoff request of its transmission, comprises according to source cell base station of target cell base station, judge that whether being fit to described travelling carriage from the forward direction shared service channel that distributes as its sub-district travelling carriage carries out soft handover, if be fit to soft handover, then travelling carriage inserts the forward direction shared service channel that target cell base station is its sub-district travelling carriage distribution among the execution in step c, and the operation of process ends; Otherwise target cell base station is according to the channel parameter that handoff request comprised of source cell base station to its transmission among the execution in step d, and for travelling carriage distributes Forward Dedicated Traffic Channel, travelling carriage inserts the operation of this Forward Dedicated Traffic Channel.
Before described travelling carriage inserted described forward direction shared service channel, this method further comprised:
Target cell base station sends handover acknowledge to source cell base station, and source cell base station guides travelling carriage to insert described forward direction shared service channel according to this handover acknowledge.
Described handover acknowledge is: comprise the message of target cell base station for the forward direction shared service channel parameter of its sub-district travelling carriage distribution.
Before described travelling carriage inserted described Forward Dedicated Traffic Channel, this method further comprised:
Target cell base station sends handover acknowledge to source cell base station, and source cell base station guides travelling carriage to insert described Forward Dedicated Traffic Channel according to this handover acknowledge.
After described travelling carriage inserted described Forward Dedicated Traffic Channel, this method further comprised following operation:
Travelling carriage inserts target cell base station again for the forward direction shared service channel that its sub-district travelling carriage distributes, and discharge described Forward Dedicated Traffic Channel, and the source of release cell base station is its assigned radio resource.
After described travelling carriage inserts described Forward Dedicated Traffic Channel, insert the forward direction shared service channel that target cell base station is distributed for its sub-district travelling carriage again, discharge described Forward Dedicated Traffic Channel, and the source of release cell base station may further comprise the steps for its assigned radio resource:
When c31. the intensity that receives the cell-of-origin pilot signal when travelling carriage was lower than the release threshold value that self is provided with, travelling carriage sent pilot measurement reports to network side, after source cell base station is received this pilot measurement reports, sent handoff request to target cell base station;
C32. after target cell base station is received described handoff request, send handover acknowledge to source cell base station, source cell base station guides travelling carriage to insert described forward direction shared service channel according to this handover acknowledge, and discharge the wireless connections of itself and this travelling carriage, send to target cell base station again and discharge indication;
C33. after target cell base station is received and discharged indication, discharge the Forward Dedicated Traffic Channel that it distributes for this travelling carriage.
Among the step c32, described handover acknowledge is: comprise the message of target cell base station for the forward direction shared service channel parameter of its sub-district travelling carriage distribution.
In the steps d, after travelling carriage inserted described Forward Dedicated Traffic Channel, this method further comprised following operation:
Travelling carriage source of release cell base station is its assigned radio resource.
Described travelling carriage source of release cell base station may further comprise the steps for its assigned radio resource:
D1. when cell-of-origin pilot signal strength that travelling carriage receives was lower than the release threshold value that self is provided with, travelling carriage sent pilot measurement reports to network side;
D2. after source cell base station is received described pilot measurement reports, send to switch indication, after travelling carriage is received this indication, discharge the wireless connections of itself and cell-of-origin to travelling carriage.
Compared with prior art, the cross district switching method of cluster mobile station provided by the present invention, when the travelling carriage that belongs to a group carries out transregional switching, target cell base station judges whether self is that its sub-district travelling carriage has distributed forward direction shared service channel earlier, do not distribute if, just for this travelling carriage distributes a Forward Dedicated Traffic Channel, this travelling carriage and then soft handover are to described Forward Dedicated Traffic Channel.
If target cell base station has been distributed forward direction shared service channel for its sub-district travelling carriage, target cell base station judges then whether this forward direction shared service channel is fit to travelling carriage and carries out soft handover, if be fit to, the then direct soft handover of travelling carriage is the forward direction shared service channel that its sub-district travelling carriage distributes to target cell base station.Otherwise travelling carriage can directly pass through direct-cut operation at the fringe region of Target cell signal cover, inserts this forward direction shared service channel; Target cell base station also can be distributed a Forward Dedicated Traffic Channel for this travelling carriage earlier, travelling carriage and then soft handover are the forward direction shared service channel that its sub-district travelling carriage distributes by this Forward Dedicated Traffic Channel direct-cut operation to target cell base station to this Forward Dedicated Traffic Channel again.It is that the forward direction shared service channel that its sub-district travelling carriage distributes can be fully utilized that the inventive method makes cell base station, has saved the system resource of cell base station.
Description of drawings
Fig. 1 is the transregional switching flow figure of cluster mobile station of the present invention's first preferred embodiment;
Fig. 2 A is the travelling carriage mobile alignment figure of the present invention's first preferred embodiment;
Channel access state figure when Fig. 2 B is in the p1 position for the travelling carriage of the present invention's first preferred embodiment;
Channel access state figure when Fig. 2 C is in the p2 position for the travelling carriage of the present invention's first preferred embodiment;
Channel access state figure when Fig. 2 D is in the p3 position for the travelling carriage of the present invention's first preferred embodiment;
Channel access state figure when Fig. 2 E is in the p4 position for the travelling carriage of the present invention's first preferred embodiment;
Fig. 3 is the transregional switching flow figure of cluster mobile station of the present invention's second preferred embodiment;
Fig. 4 A is the travelling carriage mobile alignment figure of the present invention's second preferred embodiment;
Channel access state figure when Fig. 4 B is in the p1 position for the travelling carriage of the present invention's second preferred embodiment;
Channel access state figure when Fig. 4 C is in the p2 position for the travelling carriage of the present invention's second preferred embodiment;
Channel access state figure when Fig. 4 D is in the p3 position for the travelling carriage of the present invention's second preferred embodiment;
Channel access state figure when Fig. 4 E is in the p4 position for the travelling carriage of the present invention's second preferred embodiment;
Channel access state figure when Fig. 4 F is in the p5 position for the travelling carriage of the present invention's second preferred embodiment.
Embodiment
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
The cross district switching method of cluster mobile station of the present invention, when certain travelling carriage in the group carries out transregional switching, target cell base station judges whether self is that its sub-district travelling carriage has distributed forward direction shared service channel earlier, do not distribute if, just for this travelling carriage distributes a Forward Dedicated Traffic Channel, this travelling carriage and then soft handover are to described Forward Dedicated Traffic Channel.
If target cell base station has been distributed forward direction shared service channel for the travelling carriage that belongs to same group with described transregional switching travelling carriage in its sub-district, target cell base station judges then whether this forward direction shared service channel is fit to travelling carriage and carries out soft handover, if be fit to, the then direct soft handover of travelling carriage is the forward direction shared service channel that its sub-district travelling carriage distributes to target cell base station.Otherwise travelling carriage can directly pass through direct-cut operation at the fringe region of Target cell signal cover, inserts this forward direction shared service channel; Target cell base station also can be distributed a Forward Dedicated Traffic Channel for this travelling carriage earlier, travelling carriage and then soft handover are the forward direction shared service channel that its sub-district travelling carriage distributes by this Forward Dedicated Traffic Channel direct-cut operation to target cell base station to this Forward Dedicated Traffic Channel again.
Now, the present invention is further detailed explanation to reach a specific embodiment in conjunction with the accompanying drawings earlier.
Embodiment one:
For making description clearer and more definite, clear, suppose that now the following stated travelling carriage all belongs to same group.
Fig. 1 is the transregional switching flow figure of the cluster mobile station of a preferred embodiment of the present invention, and Fig. 1 specifically may further comprise the steps:
Step 100: when the travelling carriage that belongs to same group carries out trunking communication, the a plurality of travelling carriages that belong to this group in each sub-district insert the forward direction shared service channel that its place cell base station distributes for its sub-district travelling carriage respectively, with the wireless connections of maintenance with the base station.At this moment, if there is certain travelling carriage that belongs to this group to be moved to adjacent Target cell by the cell-of-origin at its current place, then this travelling carriage can enter the common zone that covers of a cell-of-origin signal and Target cell signal in moving process.
When the Target cell pilot signal that receives when travelling carriage arrives certain intensity, just send pilot measurement message, comprise the relevant information that travelling carriage receives the Target cell pilot signal strength in this pilot measurement message to source cell base station.After source cell base station is received this message, send handoff request message to target cell base station, the channel parameter that comprises the forward direction shared service channel that source cell base station distributes for this travelling carriage in this handoff request message, this channel parameter are meant that source cell base station is parameters such as the radio configuration that comprised of forward direction shared service channel that its sub-district travelling carriage distributes, Long Code Mask, frame biasing.
Step 101: target cell base station judges self whether to be that travelling carriage in this sub-district has distributed forward direction shared service channel, if distributed, then enters step 104; Otherwise, enter step 102.
Step 102: the channel parameter that target cell base station is comprised according to the handoff request message of receiving is that travelling carriage distributes a Forward Dedicated Traffic Channel, and return handover acknowledge message to source cell base station, this message comprises the channel parameter that target cell base station is the Forward Dedicated Traffic Channel that distributes of travelling carriage.
Step 103: after source cell base station was received the handover acknowledge message that target cell base station returns, just to guide travelling carriage to insert target cell base station be the Forward Dedicated Traffic Channel that travelling carriage distributes to the channel parameter that comprises according to this message.
Above-mentioned target cell base station is the Forward Dedicated Traffic Channel that travelling carriage distributes, with the current source cell base station that inserts simultaneously of travelling carriage be the forward direction shared service channel of its distribution, have channel parameters such as identical radio configuration, Long Code Mask, frame biasing, this makes travelling carriage can receive and handle the wireless signal from source cell base station and target cell base station simultaneously.
When travelling carriage continues to move to Target cell, and when the intensity that receives the cell-of-origin pilot signal is reduced to a certain degree, travelling carriage just sends pilot measurement message to source cell base station, comprises the relevant information that travelling carriage receives the Target cell pilot signal strength in this pilot measurement message.After source cell base station is received this message, just send switch indicating information, after travelling carriage is received this message, just discharge the wireless connections of itself and cell-of-origin to travelling carriage, and process ends.
Step 104: the parameter that target cell base station is comprised according to the handoff request message of receiving, judge that whether being fit to this travelling carriage from the forward direction shared service channel that distributes as its sub-district travelling carriage carries out soft handover, if be fit to, then enters step 105; Otherwise, enter step 107.
The above-mentioned soft handover that whether is fit to, specifically be meant: parameters such as the radio configuration that the forward direction shared service channel that target cell base station is distributed for its sub-district travelling carriage is comprised, Long Code Mask, frame biasing, whether parameters such as the radio configuration that is comprised with forward direction shared service channel that source cell base station is distributed for its sub-district travelling carriage, Long Code Mask, frame biasing are identical, if identical, then think suitable soft handover; Otherwise, just think to be not suitable for soft handover.
Step 105: target cell base station is returned handover acknowledge message to source cell base station, and this handover acknowledge message comprises the channel parameter of target cell base station for the forward direction shared service channel of its sub-district travelling carriage distribution.After source cell base station was received the handover acknowledge message that target cell base station returns, just the channel parameter that is comprised according to this handover acknowledge message guided this travelling carriage to insert the forward direction shared service channel that target cell base station is distributed for its sub-district travelling carriage.
Step 106: when travelling carriage continues to move to Target cell, and when the intensity that receives the cell-of-origin pilot signal is reduced to a certain degree, travelling carriage just sends pilot measurement message to network side, comprises the relevant information that travelling carriage receives the cell-of-origin pilot signal strength in this pilot measurement message.After source cell base station is received this message, just send switch indicating information to travelling carriage, after travelling carriage is received this message, just discharge the wireless connections of itself and cell-of-origin, this travelling carriage transregional switches to this and promptly comes to an end.
Step 107: the travelling carriage direct-cut operation is the forward direction shared service channel that its sub-district travelling carriage distributes to target cell base station, and concrete method for hard switching is:
Target cell base station is returned handover acknowledge message to source cell base station, and this handover acknowledge message comprises the channel parameter of target cell base station for the forward direction shared service channel of its sub-district travelling carriage distribution.After source cell base station is received the handover acknowledge message that target cell base station returns, just discharge itself and this user's wireless connections, and, guide this travelling carriage to insert the forward direction shared service channel that target cell base station is distributed for its sub-district travelling carriage according to the channel parameter that this handover acknowledge message is comprised.
In the above-mentioned step 107, though travelling carriage has inserted the forward direction shared service channel that target cell base station is distributed for its sub-district travelling carriage by direct-cut operation, but generally speaking, the current edge that is in the Target cell signal coverage areas of travelling carriage, so, travelling carriage carries out the moment of direct-cut operation, easily the strong inadequately call drop of Target cell signal because of receiving.
Below, by describing the different channels access state of travelling carriage in transregional handoff procedure, the described travelling carriage cross district switching method of further clear and definite present embodiment.
Referring to Fig. 2 A, Fig. 2 A is the travelling carriage mobile alignment figure of the present invention's first preferred embodiment.Wherein, three circles are represented the signal cover of sub-district a, sub-district b and sub-district c respectively, and p1 to p4 represents travelling carriage residing position in different moving process, the line segment of band arrow is represented the mobile alignment of travelling carriage, as seen, travelling carriage has experienced four different processes altogether in moving.When travelling carriage was positioned at the p1 position, travelling carriage only was in the signal cover of sub-district a; When travelling carriage moved to the p2 position, travelling carriage was in the common scope that covers of b signal of the signal of sub-district a and sub-district; When travelling carriage was positioned at the p3 position, travelling carriage only was in the signal cover of sub-district b; When travelling carriage moved to the p4 position, travelling carriage was in the common scope that covers of signal of the signal of sub-district b and sub-district c.
Now suppose all to exist among sub-district a, sub-district b and the sub-district c travelling carriage that belongs to same group with the above-mentioned travelling carriage that moves to the p4 position by the p1 position, and all travelling carriages of the following stated all belong to same group.When these travelling carriages carried out trunking communication, it was the forward direction shared service channel of its distribution that the travelling carriage among a of sub-district inserts a base station, sub-district; It is the forward direction shared service channel of its distribution that travelling carriage among the b of sub-district inserts b base station, sub-district; It is the forward direction shared service channel of its distribution that travelling carriage among the c of sub-district inserts c base station, sub-district.In addition, the travelling carriage among the forward direction shared service channel suitable cell a of sub-district b base station assigns carries out soft handover; The travelling carriage that the forward direction shared service channel of sub-district c base station assigns then is not suitable among the b of sub-district carries out soft handover.
Referring to Fig. 2 B, the channel access state figure when Fig. 2 B is in the p1 position for the travelling carriage of the present invention's first preferred embodiment.Shown in Fig. 2 B, travelling carriage is in the p1 position, the forward direction shared service channel that on behalf of a base station, sub-district, the real segment of an end band arrow other end band initial point distribute for its sub-district travelling carriage, and at this moment, travelling carriage just keeps wireless connections by this channel and base station; The phantom line segments of the end band arrow other end band initial point among sub-district b and the sub-district c then represent b base station, sub-district and c base station, sub-district respectively to do for oneself forward direction shared service channel that its sub-district travelling carriage distributes, and this moment, this travelling carriage did not insert the forward direction shared service channel of b base station, sub-district or sub-district c base station assigns, and above-mentioned initial point is then represented the base station.The represented implication of initial point among the represented implication of initial point among each figure of the following stated and line segment and this figure and line segment is identical.
By Fig. 2 B as can be known, when travelling carriage communicates in the p1 position at its current place, be that forward direction shared service channel and a base station, sub-district that its sub-district travelling carriage distributes keeps wireless connections by a base station, sub-district.
Referring to Fig. 2 C, the channel access state figure when Fig. 2 C is in the p2 position for the travelling carriage of the present invention's first preferred embodiment.Shown in Fig. 2 C, travelling carriage is in the p2 position now, at this moment, it is the forward direction shared service channel that its sub-district travelling carriage distributes that travelling carriage inserts b base station, sub-district by soft handover, then travelling carriage is current except being that forward direction shared service channel and a base station, sub-district that its sub-district travelling carriage distributes keeps the radio communication by a base station, sub-district, is that forward direction shared service channel and the b base station, sub-district that its sub-district travelling carriage distributes keeps radio communication by b base station, sub-district also.
Referring to Fig. 2 D, the channel access state figure when Fig. 2 D is in the p3 position for the travelling carriage of the present invention's first preferred embodiment.Shown in Fig. 2 D, travelling carriage is in the p3 position now, when the intensity that receives sub-district a pilot signal when travelling carriage is reduced to a certain degree, just sends pilot measurement message to a base station, sub-district.After this message is received in a base station, sub-district, just send switch indicating information, after travelling carriage is received this message, just discharge the wireless connections of itself and sub-district a to travelling carriage.Then travelling carriage is current is that forward direction shared service channel and the b base station, sub-district that its sub-district travelling carriage distributes keeps radio communication by b base station, sub-district only just.
Referring to Fig. 2 E, the channel access state figure when Fig. 2 E is in the p4 position for the travelling carriage of the present invention's first preferred embodiment.Shown in Fig. 2 E, travelling carriage is in the p4 position now, at this moment, it is the forward direction shared service channel that its sub-district travelling carriage distributes that travelling carriage inserts c base station, sub-district by direct-cut operation, simultaneously, b base station, sub-district discharges the wireless connections of setting up with this travelling carriage, and then travelling carriage is current is that forward direction shared service channel and the c base station, sub-district that its sub-district travelling carriage distributes keeps radio communication by c base station, sub-district only just.
Embodiment two:
When carrying out direct-cut operation at Target cell signal coverage areas edge in order to solve travelling carriage, the call drop problem that is easy to generate, below, enumerate a more excellent travelling carriage cross district switching method again.
Referring to Fig. 3, Fig. 3 is the transregional switching flow figure of cluster mobile station of the present invention's second preferred embodiment.Wherein, step 300 to step 306 respectively with the described flow process of Fig. 1 in step 100 identical to step 106.Now, only from the step 307 of Fig. 3, the more excellent flow process when travelling carriage is transregional to be switched is described.
Step 307～308: after target cell base station is judged the suitable soft handover of this travelling carriage, just the channel parameter that is comprised according to the handoff request message of receiving is that travelling carriage distributes a Forward Dedicated Traffic Channel, and return handover acknowledge message to source cell base station, this handover acknowledge message comprises the channel parameter that target cell base station is the Forward Dedicated Traffic Channel of travelling carriage distribution, after source cell base station was received this handover acknowledge message, just the channel parameter that comprises according to this message guided travelling carriage to insert the Forward Dedicated Traffic Channel that target cell base station is the travelling carriage distribution.
Above-mentioned target cell base station is the Forward Dedicated Traffic Channel that travelling carriage distributes, with the source cell base station of the current access of travelling carriage be the forward direction shared service channel of its distribution, have channel parameters such as identical radio configuration, Long Code Mask, frame biasing, this makes travelling carriage can receive and handle the wireless signal from source cell base station and target cell base station simultaneously.
Step 309: move to Target cell because continue when travelling carriage, make when its intensity that receives the cell-of-origin pilot signal is reduced to a certain degree, travelling carriage just sends pilot measurement message to network side, comprises the relevant information that travelling carriage receives the cell-of-origin pilot signal strength in this pilot measurement message.After source cell base station is received this message, send handoff request message to target cell base station once more.Target cell base station is returned handover acknowledge message to source cell base station after receiving this handoff request message, and this handover acknowledge message comprises the channel parameter of target cell base station for the forward direction shared service channel of its sub-district travelling carriage distribution.
After source cell base station is received above-mentioned handover acknowledge message, discharge itself and this user's wireless connections, and, guide this travelling carriage to insert the forward direction shared service channel that target cell base station is distributed for its sub-district travelling carriage according to the channel parameter that this handover acknowledge message comprises; Afterwards, source cell base station sends handoff request message to target cell base station, after target cell base station is received this handoff request message, discharges the Forward Dedicated Traffic Channel that it distributes for this travelling carriage.
At this moment, travelling carriage is that forward direction shared service channel and the target cell base station that its sub-district travelling carriage distributes keeps radio communication by target cell base station only.
Wherein, step 309 is actual is a direct-cut operation.In step 309, source cell base station discharges its forward direction shared service channel that distributes for this travelling carriage; Source cell base station guides this travelling carriage to insert the forward direction shared service channel that target cell base station is distributed for its sub-district travelling carriage; And target cell base station discharges it for these three operations of Forward Dedicated Traffic Channel that this travelling carriage distributes, and can successively carry out, and also can carry out simultaneously.
In addition, when the user carried out direct-cut operation in step 309, it had been in the Target cell signal cover, can receive the zone of strong relatively signal.At this moment the direct-cut operation operation of carrying out has same low cutting off rate with soft handover of the prior art, and this makes the user in the process of whole transregional switching, can both keep continuity preferably.
Below, by describing the different channels access state of travelling carriage in transregional handoff procedure, the described travelling carriage cross district switching method of further clear and definite present embodiment.
Referring to Fig. 4 A, Fig. 4 A is the travelling carriage mobile alignment figure of the present invention's second preferred embodiment.Wherein, three circles are represented the signal cover of sub-district a, sub-district b and sub-district c respectively, and p1 to p5 represents travelling carriage residing position in different moving process, the line segment of band arrow is represented the mobile alignment of travelling carriage, as seen, travelling carriage has experienced five different processes altogether in moving.When travelling carriage was positioned at the p1 position, travelling carriage only was in the signal cover of sub-district a; When travelling carriage moved to the p2 position, travelling carriage was in the common scope that covers of b signal of the signal of sub-district a and sub-district; When travelling carriage was positioned at the p3 position, travelling carriage only was in the signal cover of sub-district b; When travelling carriage moved to the p4 position, travelling carriage was in the common scope that covers of signal of the signal of sub-district b and sub-district c; When travelling carriage was positioned at the p5 position, travelling carriage only was in the signal cover of sub-district c.
Now suppose all to exist among sub-district a, sub-district b and the sub-district c travelling carriage that belongs to same group with the above-mentioned travelling carriage that moves to the p5 position by the p1 position, and all travelling carriages of the following stated all belong to same group.When these travelling carriages carried out trunking communication, it was the forward direction shared service channel of its distribution that the travelling carriage among a of sub-district inserts a base station, sub-district; It is the forward direction shared service channel of its distribution that travelling carriage among the b of sub-district inserts b base station, sub-district; It is the forward direction shared service channel of its distribution that travelling carriage among the c of sub-district inserts c base station, sub-district.In addition, the travelling carriage among the forward direction shared service channel suitable cell a of sub-district b base station assigns carries out soft handover; The travelling carriage that the forward direction shared service channel of sub-district c base station assigns then is not suitable among the b of sub-district carries out soft handover.
Fig. 4 B to Fig. 4 D in the present embodiment is identical with Fig. 2 B to Fig. 2 D among the embodiment one respectively, and now, only Fig. 4 E from present embodiment begins, and describes the different channels access state of travelling carriage in transregional handoff procedure.
Referring to Fig. 4 E, the channel access state figure when Fig. 4 E is in the p4 position for the travelling carriage of the present invention's second preferred embodiment.Shown in Fig. 4 E, travelling carriage is in the p4 position now, at this moment, a Forward Dedicated Traffic Channel is distributed for this travelling carriage in c base station, sub-district, and, make b base station, sub-district guide this travelling carriage to insert this Forward Dedicated Traffic Channel according to the corresponding message of receiving by soft handover by sending the message that comprises this channel parameter to b base station, sub-district; Simultaneously, described Forward Dedicated Traffic Channel is that the forward direction shared service channel that its sub-district travelling carriage distributes has channel parameters such as identical radio configuration, Long Code Mask, frame biasing with b base station, sub-district, makes and can carry out soft handover.
After travelling carriage is the Forward Dedicated Traffic Channel of its distribution by soft handover access c base station, sub-district, travelling carriage also is the Forward Dedicated Traffic Channel and c base station, the sub-district maintenance radio communication of its distribution by c base station, sub-district except being that forward direction shared service channel and the b base station, sub-district that its sub-district travelling carriage distributes keeps the radio communication by b base station, sub-district.
Referring to Fig. 4 F, the channel access state figure when Fig. 4 F is in the p5 position for the travelling carriage of the present invention's second preferred embodiment.Shown in Fig. 4 F, travelling carriage is in the p5 position now, at this moment, travelling carriage carries out direct-cut operation in the c of sub-district, overall direct-cut operation is operating as: travelling carriage source of release cell base station is the forward direction shared service channel of its distribution, discharging target cell base station is the Forward Dedicated Traffic Channel of its distribution, and inserts the forward direction shared service channel that Target cell is its sub-district travelling carriage distribution.
Through behind the above-mentioned direct-cut operation, travelling carriage is that forward direction shared service channel and the c base station, sub-district that its sub-district travelling carriage distributes keeps radio communication by c base station, sub-district only just.
More than all be provided with handoff threshold numerical value and discharge threshold value in the base station described in two embodiment, and with this handoff threshold numerical value and discharge threshold value and be handed down to travelling carriage with the form of broadcasting.Travelling carriage constantly compares the intensity and the described handoff threshold numerical value of the Target cell pilot signal that receives, when the intensity of the Target cell pilot signal that receives when travelling carriage surpasses handoff threshold numerical value, travelling carriage thinks that then the current Target cell pilot signal that receives has arrived certain intensity, and described pilot signal strength surpasses handoff threshold numerical value and is meant: pilot signal strength is more than or equal to handoff threshold numerical value.Equally, travelling carriage also constantly compares the intensity and the described release threshold value of the cell-of-origin pilot signal that receives, the intensity that receives the cell-of-origin pilot signal when travelling carriage is lower than when discharging threshold value, and travelling carriage thinks that then the intensity of the current cell-of-origin pilot signal that receives is reduced to a certain degree.
In addition, by the Fig. 1 among above two embodiment and Fig. 3 as can be known, when the user carries out transregional switching, need judge whether target cell base station has distributed forward direction shared service channel for its sub-district travelling carriage; If target cell base station is not distributed forward direction shared service channel for its sub-district travelling carriage, then when travelling carriage carries out soft handover, target cell base station is then distributed a Forward Dedicated Traffic Channel according to the soft handover method of prior art for this travelling carriage, travelling carriage also will insert this Forward Dedicated Traffic Channel according to the soft handover method of prior art, and when the intensity that receives the cell-of-origin pilot signal was reduced to a certain degree, final source of release cell base station was its assigned radio resource.
Above-describedly be travelling carriage is switched to Target cell by the cell-of-origin complete procedure, certainly, after travelling carriage enters cell-of-origin signal and the common coverage of Target cell signal, also might not continue to move to Target cell, but move, and finally leave the signal cover of target cell base station to the cell-of-origin; Perhaps to neither the cell-of-origin is not again another sub-district of Target cell moves and finally leave the signal cover of source cell base station and target cell base station.In this case, when the intensity that receives certain district pilots signal when travelling carriage is reduced to a certain degree, just send pilot measurement message, after this pilot measurement message is received in described sub-district, just discharge the wireless connections between itself and this travelling carriage to network side.
By the above as can be seen, it is that the forward direction shared service channel that its sub-district travelling carriage distributes can be fully utilized that the cross district switching method of cluster mobile station provided by the present invention makes cell base station, has saved the system resource of cell base station.The above only is process of the present invention and method embodiment, in order to restriction the present invention, all any modifications of being made within the spirit and principles in the present invention, is not equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1, a kind of cross district switching method of cluster mobile station is characterized in that, the method includes the steps of:
A. after the travelling carriage target approach cell signal coverage, source cell base station sends handoff request to target cell base station;
B. target cell base station judges self whether to be that the travelling carriage that belongs to same group with described travelling carriage in its sub-district has distributed forward direction shared service channel, if distributed, then enters step c; Otherwise, enter steps d;
C. travelling carriage inserts the forward direction shared service channel that target cell base station is its sub-district travelling carriage distribution, and process ends;
D. to the handoff request of its transmission, for travelling carriage distributes Forward Dedicated Traffic Channel, travelling carriage inserts this Forward Dedicated Traffic Channel to target cell base station according to source cell base station among the step a.
2, the method for claim 1 is characterized in that, among the step a, described source cell base station sends handoff request to target cell base station and comprises:
When the Target cell pilot signal strength that receives when travelling carriage surpassed the handoff threshold numerical value that is provided with, travelling carriage sent pilot measurement reports to network side, after source cell base station is received this pilot measurement reports, sent handoff request to target cell base station.
3, method as claimed in claim 1 or 2 is characterized in that, described handoff request is:
Comprise the message of source cell base station for the forward direction shared service channel parameter of its sub-district travelling carriage distribution.
4, method as claimed in claim 3 is characterized in that, among the step c, travelling carriage inserts before the described forward direction shared service channel, further may further comprise the steps:
C1. the channel parameter that in the handoff request of its transmission, comprises according to source cell base station of target cell base station, judge that whether being fit to described travelling carriage from the forward direction shared service channel that distributes as its sub-district travelling carriage carries out soft handover, if be fit to soft handover, then travelling carriage inserts the forward direction shared service channel that target cell base station is its sub-district travelling carriage distribution among the execution in step c, and the operation of process ends; Otherwise target cell base station is according to the channel parameter that handoff request comprised of source cell base station to its transmission among the execution in step d, and for travelling carriage distributes Forward Dedicated Traffic Channel, travelling carriage inserts the operation of this Forward Dedicated Traffic Channel.
5, method as claimed in claim 4 is characterized in that, before described travelling carriage inserted forward direction shared service channel, this method further comprised:
Target cell base station sends handover acknowledge to source cell base station, and source cell base station guides travelling carriage to insert described forward direction shared service channel according to this handover acknowledge.
6, method as claimed in claim 5 is characterized in that, described handover acknowledge is: comprise the message of target cell base station for the forward direction shared service channel parameter of its sub-district travelling carriage distribution.
7, method as claimed in claim 4 is characterized in that, before described travelling carriage inserted Forward Dedicated Traffic Channel, this method further comprised:
Target cell base station sends handover acknowledge to source cell base station, and source cell base station guides travelling carriage to insert described Forward Dedicated Traffic Channel according to this handover acknowledge.
8, method as claimed in claim 4 is characterized in that, after described travelling carriage inserted described Forward Dedicated Traffic Channel, this method further comprised following operation:
Travelling carriage inserts target cell base station again for the forward direction shared service channel that its sub-district travelling carriage distributes, and discharge described Forward Dedicated Traffic Channel, and the source of release cell base station is its assigned radio resource.
9, method as claimed in claim 8, it is characterized in that, after described travelling carriage inserts Forward Dedicated Traffic Channel, insert the forward direction shared service channel that target cell base station is distributed for its sub-district travelling carriage again, discharge described Forward Dedicated Traffic Channel, and the source of release cell base station may further comprise the steps for its assigned radio resource:
When c31. the intensity that receives the cell-of-origin pilot signal when travelling carriage was lower than the release threshold value that self is provided with, travelling carriage sent pilot measurement reports to network side, after source cell base station is received this pilot measurement reports, sent handoff request to target cell base station;
C32. after target cell base station is received described handoff request, send handover acknowledge to source cell base station, source cell base station guides travelling carriage to insert described forward direction shared service channel according to this handover acknowledge, and discharge the wireless connections of itself and this travelling carriage, send to target cell base station again and discharge indication;
C33. after target cell base station is received and discharged indication, discharge the Forward Dedicated Traffic Channel that it distributes for this travelling carriage.
10, method as claimed in claim 9 is characterized in that, among the step c32, described handover acknowledge is: comprise the message of target cell base station for the forward direction shared service channel parameter of its sub-district travelling carriage distribution.
11, the method for claim 1 is characterized in that, in the steps d, after travelling carriage inserted described Forward Dedicated Traffic Channel, this method further comprised following operation:
Travelling carriage source of release cell base station is its assigned radio resource.
12, method as claimed in claim 11 is characterized in that, described travelling carriage source of release cell base station may further comprise the steps for its assigned radio resource:
D1. when cell-of-origin pilot signal strength that travelling carriage receives was lower than the release threshold value that self is provided with, travelling carriage sent pilot measurement reports to network side;
D2. after source cell base station is received described pilot measurement reports, send to switch indication, after travelling carriage is received this indication, discharge the wireless connections of itself and cell-of-origin to travelling carriage.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100703982A CN100438686C (en) | 2004-08-02 | 2004-08-02 | Cross district switching method for colony mobile station |
| ROA200700070A RO123643B1 (en) | 2004-08-02 | 2005-08-02 | Method of cross-cell handover for a mobile station in a switched communication system |
| PCT/CN2005/001178 WO2006012795A1 (en) | 2004-08-02 | 2005-08-02 | A method of crossing-cell handover of cluster mobile station |
| NO20071049A NO343611B1 (en) | 2004-08-02 | 2007-02-23 | Method of handover at the cell transition in the central system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100703982A CN100438686C (en) | 2004-08-02 | 2004-08-02 | Cross district switching method for colony mobile station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1735269A CN1735269A (en) | 2006-02-15 |
| CN100438686C true CN100438686C (en) | 2008-11-26 |
Family
ID=35786876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100703982A Active CN100438686C (en) | 2004-08-02 | 2004-08-02 | Cross district switching method for colony mobile station |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN100438686C (en) |
| NO (1) | NO343611B1 (en) |
| RO (1) | RO123643B1 (en) |
| WO (1) | WO2006012795A1 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100441002C (en) * | 2006-09-19 | 2008-12-03 | 华为技术有限公司 | A method to reselect and quickly return to group call under optimal group receiving |
| CN101155415B (en) * | 2006-09-29 | 2011-02-23 | 中兴通讯股份有限公司 | Switching access method and apparatus based on random access channel |
| DE602008001662D1 (en) * | 2007-03-07 | 2010-08-12 | Nokia Corp | SYSTEM AND METHOD FOR CONFLICT-FREE TRANSMISSIONS BASED ON PRE-RESERVED TARGET CELL UPLINK ASSIGNMENTS IN COMMUNICATION SYSTEMS |
| CN100508633C (en) * | 2007-03-30 | 2009-07-01 | 华为技术有限公司 | Group switching method and device |
| CN101400096B (en) * | 2007-09-28 | 2010-06-16 | 华为技术有限公司 | Call control method, base station subsystem and user terminal |
| CN101547479B (en) * | 2008-03-27 | 2010-12-22 | 华为技术有限公司 | Method, device and system for scheduling data of base station |
| CN101730160A (en) * | 2008-10-27 | 2010-06-09 | 华为技术有限公司 | Method, system, device and base station for sending information |
| CN101742670B (en) * | 2008-11-10 | 2012-05-30 | 电信科学技术研究院 | Method and device for realizing resource scheduling |
| CN101577953B (en) * | 2009-06-09 | 2013-01-16 | 中兴通讯股份有限公司 | Soft handover method and system in trunking communication |
| CN102291788B (en) * | 2010-06-21 | 2014-06-04 | 华为技术有限公司 | Group moving terminal switching success ratio improving method, mobile agent and mobile terminal |
| CN101895825B (en) * | 2010-08-19 | 2012-10-31 | 优能通信科技（杭州）有限公司 | Session initiation protocol-based cluster switch-spanning non-annunciation group call handover switching method |
| WO2018119816A1 (en) * | 2016-12-29 | 2018-07-05 | 华为技术有限公司 | Cell switching method and device |
| CN109963313B (en) * | 2017-12-26 | 2021-08-24 | 海能达通信股份有限公司 | Channel recovery method and device after intra-system and inter-system handover |
| CN114980240B (en) * | 2021-11-19 | 2024-01-16 | 广州华立科技职业学院 | Sharing communication method, device and system for multi-operator co-built base station |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1201348A (en) * | 1997-06-03 | 1998-12-09 | Ntt移动通信网株式会社 | Switching-over control method capable of reducing control load in mobile radio communication |
| WO1999001003A1 (en) * | 1997-06-18 | 1999-01-07 | Nokia Networks Oy | Handover in a base station |
| CN1252206A (en) * | 1997-02-28 | 2000-05-03 | 诺基亚电信公司 | Handover and call setup in mobile communication system |
| WO2002067594A2 (en) * | 2001-02-16 | 2002-08-29 | Nokia Corporation | Method and device for downlink packet switching |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5267261A (en) * | 1992-03-05 | 1993-11-30 | Qualcomm Incorporated | Mobile station assisted soft handoff in a CDMA cellular communications system |
| GB2348776B (en) * | 1999-04-06 | 2003-07-09 | Motorola Ltd | A communications network and method of allocating resource thefor |
| GB9907803D0 (en) * | 1999-04-06 | 1999-06-02 | Nokia Telecommunications Oy | Handover in a mobile communication system using conference facility |
| US6725052B1 (en) * | 1999-12-20 | 2004-04-20 | Ericsson Inc. | Cell assignment method during group calls |
| AUPQ743500A0 (en) * | 2000-05-11 | 2000-06-01 | Telefonaktiebolaget Lm Ericsson (Publ) | Handover method and apparatus for voice group calls in a mobile communications system |
| SE0004922D0 (en) * | 2000-12-29 | 2000-12-29 | Ericsson Telefon Ab L M | Method and system of handover |
| US6788941B2 (en) * | 2001-12-20 | 2004-09-07 | Motorola, Inc. | Method and apparatus for mobile-initiated, CDMA-dispatch soft handoff |
| EP1365614A1 (en) * | 2002-05-22 | 2003-11-26 | Lucent Technologies Inc. | A method of selecting which base station of those in dedicated channel connection with a mobile user terminal is to be in shared channel connection with the mobile user terminal, and a corresponding network for mobile telecommunications |
| FI20021042A0 (en) * | 2002-05-31 | 2002-05-31 | Sonera Oyj | Method and controller for updating a subscriber terminal's activit in a cellular radio system |
| EP1432262A1 (en) * | 2002-12-20 | 2004-06-23 | Matsushita Electric Industrial Co., Ltd. | Protocol context preservation in mobile communication systems |
-
2004
- 2004-08-02 CN CNB2004100703982A patent/CN100438686C/en active Active
-
2005
- 2005-08-02 WO PCT/CN2005/001178 patent/WO2006012795A1/en active Application Filing
- 2005-08-02 RO ROA200700070A patent/RO123643B1/en unknown
-
2007
- 2007-02-23 NO NO20071049A patent/NO343611B1/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1252206A (en) * | 1997-02-28 | 2000-05-03 | 诺基亚电信公司 | Handover and call setup in mobile communication system |
| CN1201348A (en) * | 1997-06-03 | 1998-12-09 | Ntt移动通信网株式会社 | Switching-over control method capable of reducing control load in mobile radio communication |
| WO1999001003A1 (en) * | 1997-06-18 | 1999-01-07 | Nokia Networks Oy | Handover in a base station |
| WO2002067594A2 (en) * | 2001-02-16 | 2002-08-29 | Nokia Corporation | Method and device for downlink packet switching |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1735269A (en) | 2006-02-15 |
| NO343611B1 (en) | 2019-04-15 |
| NO20071049L (en) | 2007-04-30 |
| WO2006012795A1 (en) | 2006-02-09 |
| RO123643B1 (en) | 2015-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100438686C (en) | Cross district switching method for colony mobile station | |
| KR100244193B1 (en) | The method of hard handoff using dummy pilot | |
| KR100259846B1 (en) | Semi-soft handoff | |
| CN100551121C (en) | The method of mobile terminal skip zone autonomous switching | |
| US7307969B2 (en) | Method and system for making handoff between CDMA mobile communication system | |
| CN101562835B (en) | Method for switching terminal among heterogeneous hierarchical distributing type base stations | |
| CN101370239B (en) | Handover method and customer equipment | |
| CN100454794C (en) | Hard switchover judging method for wide band CDMA system | |
| CN100464603C (en) | Method for handover in digital cellular communication system using same-frequency netting | |
| CN100466822C (en) | Method and apparatus for selecting target cell | |
| CN100502557C (en) | User's terminal switch control method in mobile communication system | |
| KR20000001838A (en) | Determining point of time and environment of hard handoff between frequencies of mobile communication system | |
| CN102271374A (en) | Rapid switching method of TD-LTE (Time-division Duplex Long Term Evolution) communication system based on destination cell pre-load | |
| TW201008204A (en) | Pilot signal set management in a multi-carrier communication system | |
| CN101137227A (en) | Hard handoff method in digital cluster system | |
| CN101772108B (en) | Method, system and device for realizing handoff in micro-micro cellular communication system | |
| CN100358370C (en) | Method for switching aggregated terminal on receiving business state | |
| WO2000038439A3 (en) | Systems and methods to assist a handover operation of a mobile station, including methods of performing an inter-bsc cell change during group calls | |
| CN1964551A (en) | A method to realize soft hand-over of group call in CDMA cluster system | |
| CN101262654B (en) | Call establishment method for digital cluster system | |
| CN102123470A (en) | Circuit switched domain based system and method for transmitting GSM-R (Global System for Mobile Communication-Railway) train control data in real time | |
| CN101179822B (en) | Method, device and system for implementing soft switch | |
| CN101420732B (en) | Soft switching method and system for cross base station controller, target base station controller | |
| CN100551161C (en) | The method that mobile terminal skip zone switches | |
| CN101677450A (en) | Method and device for switching cells and communication system thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |