Resumen
A radio base station system is disclosed that comprises at least one Radio Equipment Control, REC, (3) that comprises radio functions of a digital baseband domain, at least one Radio Equipment, RE, (2) that serves as an air interface and comprises analogue radio frequency functions, and a CPRI link (6) connecting said at least one REC (3) and said at least one RE (2), wherein the CPRI traffic carried by said CPRI link (6) leaves an amount of spare capacity. In order to enhance the efficiency of the CPRI bandwidth utilization and to reduce the amount of available capacity that remains unused the amount of spare capacity of said aggregated CPRI link (6) is determined and non-CPRI frames are encapsulated within said spare capacity.
Reivindicaciones
C l a i m s 1. Radio base station system, comprising: at least one Radio Equipment Control, REC, (3) that comprises radio functions of a digital baseband domain, at least one Radio Equipment, RE, (2) that serves as an air interface and comprises analogue radio frequency functions, and a CPRI link (6) connecting said at least one REC (3) and said at least one RE (2), wherein the CPRI traffic carried by said CPRI link (6) leaves an amount of spare capacity, and said CPRI link (6) carries non-CPRI traffic encapsulated within said spare capacity. 2. System according to claim 1 , further comprising an aggregation point (4) configured to perform a fragmentation of non-CPRI frames according to said spare bandwidth and to perform multiplexing of said non-CPRI frames with the CPRI traffic carried by said CPRI link (6). 3. System according to claim 2, wherein said aggregation point (4) includes a number of queues (8) for queuing non-CPRI traffic per aggregated non-CPRI traffic sources. 4. System according to claim 3, wherein said aggregation point (4) includes a fragmentation buffer (9) connected to said queues (8), wherein said fragmentation buffer (9) is configured to maintain the portions of non-CPRI frames not yet injected into said CPRI link (6). 5. System according to any of claims 1 to 4, further comprising a deaggregation point (5) located on said CPRI link (6) ahead of the at least one REC (3) that terminates said CPRI link (6), wherein said deaggregation point (5) is configured to recover and reassemble said non-CPRI frames. 6. System according to any of claims 1 to 5, wherein said CPRI link (6) is an aggregated CPRI link that carries CPRI traffic from a chain of REs (2). 7. System according to any of claims 1 to 6, wherein said CPRI link (6) is a high speed of at least 10137.6 Mbps as link rate. 8. Method for CPRI basic frame assembly, in particular for deployment in a radio base station system according to any of claims 1 to 7, the method comprising: providing an aggregated CPRI link (6) that carries CPRI traffic from one or more CPRI links, determining an amount of spare capacity of said aggregated CPRI link (6), and encapsulating non-CPRI frames within said spare capacity. 9. Method according to claim 8, wherein said non-CPRI frames include Ethernet frames. 10. Method according to claim 8 or 9, wherein said aggregated CPRI link (6) aggregates CPRI traffic from a number of Radio Equipments, RE (2). 1 1. Method according to any of claims 8 to 10, wherein the encapsulation of non-CPRI frames within said aggregated CPRI link's (6) spare capacity is performed by fragmenting said non-CPRI frames according to said spare bandwidth and by introducing a frame delimiter sequence at the beginning and at the end of said non-CPRI frames. 12. Method according to any of claims 8 to 1 1 , wherein the unused capacity of the control word of said CPRI basic frame is employed for introducing signaling and/or control information related to said non-CPRI frames. 13. Method according to any of claims 8 to 12, wherein the unused capacity of the control word of said CPRI basic frame is employed for introducing information on the byte or word where said non-CPRI frames start. 14. Method according to any of claims 8 to 13, wherein the unused capacity of the control word of said CPRI basic frame is employed for introducing a flag that indicates whether a non-CPRI frame carried within said CPRI basic frame is fragmented or not. 15. Method according to any of claims 8 to 14, wherein the unused capacity of the control word of said CPRI basic frame is employed for introducing a first flag that indicates whether the first non-CPRI frame carried within said CPRI basic frame is fragmented or not and a second flag that indicates whether the last non- CPRI frame carried within said CPRI basic frame is fragmented or not.
